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Merge branch 'main' of https://github.com/embassy-rs/embassy into tl-mbox-2

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This commit is contained in:
xoviat 2023-06-19 21:18:46 -05:00
commit 0d67ef795e
69 changed files with 2911 additions and 3581 deletions
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10
docs/modules/ROOT/examples/layer-by-layer/blinky-irq/src/main.rs
View File

@ -20,13 +20,13 @@ fn main() -> ! {
let led = Output::new(p.PB14, Level::Low, Speed::Low);
let mut button = Input::new(p.PC13, Pull::Up);
cortex_m::interrupt::free(|cs| unsafe {
cortex_m::interrupt::free(|cs| {
enable_interrupt(&mut button);
LED.borrow(cs).borrow_mut().replace(led);
BUTTON.borrow(cs).borrow_mut().replace(button);
NVIC::unmask(pac::Interrupt::EXTI15_10);
unsafe { NVIC::unmask(pac::Interrupt::EXTI15_10) };
});
loop {
@ -64,25 +64,21 @@ const PORT: u8 = 2;
const PIN: usize = 13;
fn check_interrupt<P: Pin>(_pin: &mut Input<'static, P>) -> bool {
let exti = pac::EXTI;
unsafe {
let pin = PIN;
let lines = exti.pr(0).read();
lines.line(pin)
}
}
fn clear_interrupt<P: Pin>(_pin: &mut Input<'static, P>) {
let exti = pac::EXTI;
unsafe {
let pin = PIN;
let mut lines = exti.pr(0).read();
lines.set_line(pin, true);
exti.pr(0).write_value(lines);
}
}
fn enable_interrupt<P: Pin>(_pin: &mut Input<'static, P>) {
cortex_m::interrupt::free(|_| unsafe {
cortex_m::interrupt::free(|_| {
let rcc = pac::RCC;
rcc.apb2enr().modify(|w| w.set_syscfgen(true));

8
embassy-lora/src/iv.rs
View File

@ -68,29 +68,23 @@ where
}
async fn set_nss_low(&mut self) -> Result<(), RadioError> {
let pwr = pac::PWR;
unsafe {
pwr.subghzspicr().modify(|w| w.set_nss(pac::pwr::vals::Nss::LOW));
}
Ok(())
}
async fn set_nss_high(&mut self) -> Result<(), RadioError> {
let pwr = pac::PWR;
unsafe {
pwr.subghzspicr().modify(|w| w.set_nss(pac::pwr::vals::Nss::HIGH));
}
Ok(())
}
async fn reset(&mut self, _delay: &mut impl DelayUs) -> Result<(), RadioError> {
let rcc = pac::RCC;
unsafe {
rcc.csr().modify(|w| w.set_rfrst(true));
rcc.csr().modify(|w| w.set_rfrst(false));
}
Ok(())
}
async fn wait_on_busy(&mut self) -> Result<(), RadioError> {
let pwr = pac::PWR;
while unsafe { pwr.sr2().read().rfbusys() == pac::pwr::vals::Rfbusys::BUSY } {}
while pwr.sr2().read().rfbusys() == pac::pwr::vals::Rfbusys::BUSY {}
Ok(())
}

4
embassy-stm32/Cargo.toml
View File

@ -57,7 +57,7 @@ sdio-host = "0.5.0"
embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
critical-section = "1.1"
atomic-polyfill = "1.0.1"
stm32-metapac = "9"
stm32-metapac = "10"
vcell = "0.1.3"
bxcan = "0.7.0"
nb = "1.0.0"
@ -74,7 +74,7 @@ critical-section = { version = "1.1", features = ["std"] }
[build-dependencies]
proc-macro2 = "1.0.36"
quote = "1.0.15"
stm32-metapac = { version = "9", default-features = false, features = ["metadata"]}
stm32-metapac = { version = "10", default-features = false, features = ["metadata"]}
[features]
default = ["rt"]

6
embassy-stm32/build.rs
View File

@ -322,7 +322,7 @@ fn main() {
let rst_reg = format_ident!("{}", rst.register.to_ascii_lowercase());
let set_rst_field = format_ident!("set_{}", rst.field.to_ascii_lowercase());
quote! {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.#rst_reg().modify(|w| w.#set_rst_field(true));
crate::pac::RCC.#rst_reg().modify(|w| w.#set_rst_field(false));
});
@ -353,13 +353,13 @@ fn main() {
})
}
fn enable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.#en_reg().modify(|w| w.#set_en_field(true));
#after_enable
})
}
fn disable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.#en_reg().modify(|w| w.#set_en_field(false));
})
}

20
embassy-stm32/src/adc/f1.rs
View File

@ -32,15 +32,12 @@ impl<'d, T: Instance> Adc<'d, T> {
into_ref!(adc);
T::enable();
T::reset();
unsafe {
T::regs().cr2().modify(|reg| reg.set_adon(true));
}
// 11.4: Before starting a calibration, the ADC must have been in power-on state (ADON bit = ‘1’)
// for at least two ADC clock cycles
delay.delay_us((1_000_000 * 2) / Self::freq().0 + 1);
unsafe {
// Reset calibration
T::regs().cr2().modify(|reg| reg.set_rstcal(true));
while T::regs().cr2().read().rstcal() {
@ -52,7 +49,6 @@ impl<'d, T: Instance> Adc<'d, T> {
while T::regs().cr2().read().cal() {
// spin
}
}
// One cycle after calibration
delay.delay_us((1_000_000) / Self::freq().0 + 1);
@ -81,20 +77,16 @@ impl<'d, T: Instance> Adc<'d, T> {
}
pub fn enable_vref(&self, _delay: &mut impl DelayUs<u32>) -> Vref {
unsafe {
T::regs().cr2().modify(|reg| {
reg.set_tsvrefe(true);
})
}
});
Vref {}
}
pub fn enable_temperature(&self) -> Temperature {
unsafe {
T::regs().cr2().modify(|reg| {
reg.set_tsvrefe(true);
})
}
});
Temperature {}
}
@ -104,7 +96,6 @@ impl<'d, T: Instance> Adc<'d, T> {
/// Perform a single conversion.
fn convert(&mut self) -> u16 {
unsafe {
T::regs().cr2().modify(|reg| {
reg.set_adon(true);
reg.set_swstart(true);
@ -114,10 +105,8 @@ impl<'d, T: Instance> Adc<'d, T> {
T::regs().dr().read().0 as u16
}
}
pub fn read(&mut self, pin: &mut impl AdcPin<T>) -> u16 {
unsafe {
Self::set_channel_sample_time(pin.channel(), self.sample_time);
T::regs().cr1().modify(|reg| {
reg.set_scan(false);
@ -131,14 +120,13 @@ impl<'d, T: Instance> Adc<'d, T> {
reg.set_swstart(false);
reg.set_extsel(crate::pac::adc::vals::Extsel::SWSTART);
});
}
// Configure the channel to sample
unsafe { T::regs().sqr3().write(|reg| reg.set_sq(0, pin.channel())) }
T::regs().sqr3().write(|reg| reg.set_sq(0, pin.channel()));
self.convert()
}
unsafe fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
let sample_time = sample_time.into();
if ch <= 9 {
T::regs().smpr2().modify(|reg| reg.set_smp(ch as _, sample_time));

16
embassy-stm32/src/adc/v1.rs
View File

@ -57,18 +57,14 @@ impl<'d, T: Instance> Adc<'d, T> {
//
// 6.3.20 Vbat monitoring characteristics
// ts_vbat ≥ 4μs
unsafe {
T::regs().ccr().modify(|reg| reg.set_vbaten(true));
}
Vbat
}
pub fn enable_vref(&self, delay: &mut impl DelayUs<u32>) -> Vref {
// Table 28. Embedded internal reference voltage
// tstart = 10μs
unsafe {
T::regs().ccr().modify(|reg| reg.set_vrefen(true));
}
delay.delay_us(10);
Vref
}
@ -79,15 +75,12 @@ impl<'d, T: Instance> Adc<'d, T> {
// 6.3.19 Temperature sensor characteristics
// tstart ≤ 10μs
// ts_temp ≥ 4μs
unsafe {
T::regs().ccr().modify(|reg| reg.set_tsen(true));
}
delay.delay_us(10);
Temperature
}
fn calibrate(&self) {
unsafe {
// A.7.1 ADC calibration code example
if T::regs().cr().read().aden() {
T::regs().cr().modify(|reg| reg.set_addis(true));
@ -101,35 +94,30 @@ impl<'d, T: Instance> Adc<'d, T> {
// spin
}
}
}
pub fn set_sample_time(&mut self, sample_time: SampleTime) {
self.sample_time = sample_time;
}
pub fn set_resolution(&mut self, resolution: Resolution) {
unsafe {
T::regs().cfgr1().modify(|reg| reg.set_res(resolution.into()));
}
}
pub fn read<P>(&mut self, pin: &mut P) -> u16
where
P: AdcPin<T> + crate::gpio::sealed::Pin,
{
let channel = pin.channel();
unsafe {
pin.set_as_analog();
self.read_channel(channel)
}
}
pub fn read_internal(&mut self, channel: &mut impl InternalChannel<T>) -> u16 {
let channel = channel.channel();
unsafe { self.read_channel(channel) }
self.read_channel(channel)
}
unsafe fn read_channel(&mut self, channel: u8) -> u16 {
fn read_channel(&mut self, channel: u8) -> u16 {
// A.7.2 ADC enable sequence code example
if T::regs().isr().read().adrdy() {
T::regs().isr().modify(|reg| reg.set_adrdy(true));

21
embassy-stm32/src/adc/v2.rs
View File

@ -100,13 +100,10 @@ where
T::reset();
let presc = Prescaler::from_pclk2(T::frequency());
unsafe {
T::common_regs().ccr().modify(|w| w.set_adcpre(presc.adcpre()));
T::regs().cr2().modify(|reg| {
reg.set_adon(crate::pac::adc::vals::Adon::ENABLED);
});
}
delay.delay_us(ADC_POWERUP_TIME_US);
@ -121,19 +118,15 @@ where
}
pub fn set_resolution(&mut self, resolution: Resolution) {
unsafe {
T::regs().cr1().modify(|reg| reg.set_res(resolution.into()));
}
}
/// Enables internal voltage reference and returns [VrefInt], which can be used in
/// [Adc::read_internal()] to perform conversion.
pub fn enable_vrefint(&self) -> VrefInt {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_tsvrefe(crate::pac::adccommon::vals::Tsvrefe::ENABLED);
});
}
VrefInt {}
}
@ -144,11 +137,9 @@ where
/// On STM32F42 and STM32F43 this can not be used together with [Vbat]. If both are enabled,
/// temperature sensor will return vbat value.
pub fn enable_temperature(&self) -> Temperature {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_tsvrefe(crate::pac::adccommon::vals::Tsvrefe::ENABLED);
});
}
Temperature {}
}
@ -156,18 +147,15 @@ where
/// Enables vbat input and returns [Vbat], which can be used in
/// [Adc::read_internal()] to perform conversion.
pub fn enable_vbat(&self) -> Vbat {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_vbate(crate::pac::adccommon::vals::Vbate::ENABLED);
});
}
Vbat {}
}
/// Perform a single conversion.
fn convert(&mut self) -> u16 {
unsafe {
// clear end of conversion flag
T::regs().sr().modify(|reg| {
reg.set_eoc(crate::pac::adc::vals::Eoc::NOTCOMPLETE);
@ -187,25 +175,22 @@ where
T::regs().dr().read().0 as u16
}
}
pub fn read<P>(&mut self, pin: &mut P) -> u16
where
P: AdcPin<T>,
P: crate::gpio::sealed::Pin,
{
unsafe {
pin.set_as_analog();
self.read_channel(pin.channel())
}
}
pub fn read_internal(&mut self, channel: &mut impl InternalChannel<T>) -> u16 {
unsafe { self.read_channel(channel.channel()) }
self.read_channel(channel.channel())
}
unsafe fn read_channel(&mut self, channel: u8) -> u16 {
fn read_channel(&mut self, channel: u8) -> u16 {
// Configure ADC
// Select channel
@ -219,7 +204,7 @@ where
val
}
unsafe fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
let sample_time = sample_time.into();
if ch <= 9 {
T::regs().smpr2().modify(|reg| reg.set_smp(ch as _, sample_time));

22
embassy-stm32/src/adc/v3.rs
View File

@ -12,7 +12,7 @@ pub const VREF_CALIB_MV: u32 = 3000;
/// Sadly we cannot use `RccPeripheral::enable` since devices are quite inconsistent ADC clock
/// configuration.
fn enable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
#[cfg(stm32h7)]
crate::pac::RCC.apb2enr().modify(|w| w.set_adcen(true));
#[cfg(stm32g0)]
@ -62,7 +62,6 @@ impl<'d, T: Instance> Adc<'d, T> {
pub fn new(adc: impl Peripheral<P = T> + 'd, delay: &mut impl DelayUs<u32>) -> Self {
into_ref!(adc);
enable();
unsafe {
T::regs().cr().modify(|reg| {
#[cfg(not(adc_g0))]
reg.set_deeppwd(false);
@ -73,11 +72,9 @@ impl<'d, T: Instance> Adc<'d, T> {
T::regs().cfgr1().modify(|reg| {
reg.set_chselrmod(false);
});
}
delay.delay_us(20);
unsafe {
T::regs().cr().modify(|reg| {
reg.set_adcal(true);
});
@ -85,7 +82,6 @@ impl<'d, T: Instance> Adc<'d, T> {
while T::regs().cr().read().adcal() {
// spin
}
}
delay.delay_us(1);
@ -96,11 +92,9 @@ impl<'d, T: Instance> Adc<'d, T> {
}
pub fn enable_vrefint(&self, delay: &mut impl DelayUs<u32>) -> VrefInt {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_vrefen(true);
});
}
// "Table 24. Embedded internal voltage reference" states that it takes a maximum of 12 us
// to stabilize the internal voltage reference, we wait a little more.
@ -112,21 +106,17 @@ impl<'d, T: Instance> Adc<'d, T> {
}
pub fn enable_temperature(&self) -> Temperature {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_ch17sel(true);
});
}
Temperature {}
}
pub fn enable_vbat(&self) -> Vbat {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_ch18sel(true);
});
}
Vbat {}
}
@ -136,13 +126,11 @@ impl<'d, T: Instance> Adc<'d, T> {
}
pub fn set_resolution(&mut self, resolution: Resolution) {
unsafe {
#[cfg(not(stm32g0))]
T::regs().cfgr().modify(|reg| reg.set_res(resolution.into()));
#[cfg(stm32g0)]
T::regs().cfgr1().modify(|reg| reg.set_res(resolution.into()));
}
}
/*
/// Convert a raw sample from the `Temperature` to deg C
@ -155,7 +143,6 @@ impl<'d, T: Instance> Adc<'d, T> {
/// Perform a single conversion.
fn convert(&mut self) -> u16 {
unsafe {
T::regs().isr().modify(|reg| {
reg.set_eos(true);
reg.set_eoc(true);
@ -172,10 +159,8 @@ impl<'d, T: Instance> Adc<'d, T> {
T::regs().dr().read().0 as u16
}
}
pub fn read(&mut self, pin: &mut impl AdcPin<T>) -> u16 {
unsafe {
// Make sure bits are off
while T::regs().cr().read().addis() {
// spin
@ -217,15 +202,14 @@ impl<'d, T: Instance> Adc<'d, T> {
val
}
}
#[cfg(stm32g0)]
unsafe fn set_channel_sample_time(_ch: u8, sample_time: SampleTime) {
fn set_channel_sample_time(_ch: u8, sample_time: SampleTime) {
T::regs().smpr().modify(|reg| reg.set_smp1(sample_time.into()));
}
#[cfg(not(stm32g0))]
unsafe fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
let sample_time = sample_time.into();
if ch <= 9 {
T::regs().smpr1().modify(|reg| reg.set_smp(ch as _, sample_time));

66
embassy-stm32/src/adc/v4.rs
View File

@ -46,8 +46,8 @@ foreach_peripheral!(
(adc, ADC1) => {
impl crate::rcc::sealed::RccPeripheral for crate::peripherals::ADC1 {
fn frequency() -> crate::time::Hertz {
critical_section::with(|_| unsafe {
match crate::rcc::get_freqs().adc {
critical_section::with(|_| {
match unsafe { crate::rcc::get_freqs() }.adc {
Some(ck) => ck,
None => panic!("Invalid ADC clock configuration, AdcClockSource was likely not properly configured.")
}
@ -55,7 +55,7 @@ foreach_peripheral!(
}
fn enable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb1enr().modify(|w| w.set_adc12en(true))
});
ADC12_ENABLE_COUNTER.fetch_add(1, Ordering::SeqCst);
@ -63,7 +63,7 @@ foreach_peripheral!(
fn disable() {
if ADC12_ENABLE_COUNTER.load(Ordering::SeqCst) == 1 {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb1enr().modify(|w| w.set_adc12en(false));
})
}
@ -72,7 +72,7 @@ foreach_peripheral!(
fn reset() {
if ADC12_ENABLE_COUNTER.load(Ordering::SeqCst) == 1 {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb1rstr().modify(|w| w.set_adc12rst(true));
crate::pac::RCC.ahb1rstr().modify(|w| w.set_adc12rst(false));
});
@ -85,8 +85,8 @@ foreach_peripheral!(
(adc, ADC2) => {
impl crate::rcc::sealed::RccPeripheral for crate::peripherals::ADC2 {
fn frequency() -> crate::time::Hertz {
critical_section::with(|_| unsafe {
match crate::rcc::get_freqs().adc {
critical_section::with(|_| {
match unsafe { crate::rcc::get_freqs() }.adc {
Some(ck) => ck,
None => panic!("Invalid ADC clock configuration, AdcClockSource was likely not properly configured.")
}
@ -94,7 +94,7 @@ foreach_peripheral!(
}
fn enable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb1enr().modify(|w| w.set_adc12en(true))
});
ADC12_ENABLE_COUNTER.fetch_add(1, Ordering::SeqCst);
@ -102,7 +102,7 @@ foreach_peripheral!(
fn disable() {
if ADC12_ENABLE_COUNTER.load(Ordering::SeqCst) == 1 {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb1enr().modify(|w| w.set_adc12en(false));
})
}
@ -111,7 +111,7 @@ foreach_peripheral!(
fn reset() {
if ADC12_ENABLE_COUNTER.load(Ordering::SeqCst) == 1 {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb1rstr().modify(|w| w.set_adc12rst(true));
crate::pac::RCC.ahb1rstr().modify(|w| w.set_adc12rst(false));
});
@ -124,8 +124,8 @@ foreach_peripheral!(
(adc, ADC3) => {
impl crate::rcc::sealed::RccPeripheral for crate::peripherals::ADC3 {
fn frequency() -> crate::time::Hertz {
critical_section::with(|_| unsafe {
match crate::rcc::get_freqs().adc {
critical_section::with(|_| {
match unsafe { crate::rcc::get_freqs() }.adc {
Some(ck) => ck,
None => panic!("Invalid ADC clock configuration, AdcClockSource was likely not properly configured.")
}
@ -133,19 +133,19 @@ foreach_peripheral!(
}
fn enable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb4enr().modify(|w| w.set_adc3en(true))
});
}
fn disable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb4enr().modify(|w| w.set_adc3en(false));
})
}
fn reset() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.ahb4rstr().modify(|w| w.set_adc3rst(true));
crate::pac::RCC.ahb4rstr().modify(|w| w.set_adc3rst(false));
});
@ -232,9 +232,7 @@ impl<'d, T: Instance> Adc<'d, T> {
let prescaler = Prescaler::from_ker_ck(T::frequency());
unsafe {
T::common_regs().ccr().modify(|w| w.set_presc(prescaler.presc()));
}
let frequency = Hertz(T::frequency().0 / prescaler.divisor());
info!("ADC frequency set to {} Hz", frequency.0);
@ -251,9 +249,7 @@ impl<'d, T: Instance> Adc<'d, T> {
} else {
Boost::LT50
};
unsafe {
T::regs().cr().modify(|w| w.set_boost(boost));
}
let mut s = Self {
adc,
@ -272,28 +268,23 @@ impl<'d, T: Instance> Adc<'d, T> {
}
fn power_up(&mut self, delay: &mut impl DelayUs<u16>) {
unsafe {
T::regs().cr().modify(|reg| {
reg.set_deeppwd(false);
reg.set_advregen(true);
});
}
delay.delay_us(10);
}
fn configure_differential_inputs(&mut self) {
unsafe {
T::regs().difsel().modify(|w| {
for n in 0..20 {
w.set_difsel(n, Difsel::SINGLEENDED);
}
})
};
});
}
fn calibrate(&mut self) {
unsafe {
T::regs().cr().modify(|w| {
w.set_adcaldif(Adcaldif::SINGLEENDED);
w.set_adcallin(true);
@ -303,53 +294,42 @@ impl<'d, T: Instance> Adc<'d, T> {
while T::regs().cr().read().adcal() {}
}
}
fn enable(&mut self) {
unsafe {
T::regs().isr().write(|w| w.set_adrdy(true));
T::regs().cr().modify(|w| w.set_aden(true));
while !T::regs().isr().read().adrdy() {}
T::regs().isr().write(|w| w.set_adrdy(true));
}
}
fn configure(&mut self) {
// single conversion mode, software trigger
unsafe {
T::regs().cfgr().modify(|w| {
w.set_cont(false);
w.set_exten(Exten::DISABLED);
})
}
});
}
pub fn enable_vrefint(&self) -> VrefInt {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_vrefen(true);
});
}
VrefInt {}
}
pub fn enable_temperature(&self) -> Temperature {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_vsenseen(true);
});
}
Temperature {}
}
pub fn enable_vbat(&self) -> Vbat {
unsafe {
T::common_regs().ccr().modify(|reg| {
reg.set_vbaten(true);
});
}
Vbat {}
}
@ -359,14 +339,11 @@ impl<'d, T: Instance> Adc<'d, T> {
}
pub fn set_resolution(&mut self, resolution: Resolution) {
unsafe {
T::regs().cfgr().modify(|reg| reg.set_res(resolution.into()));
}
}
/// Perform a single conversion.
fn convert(&mut self) -> u16 {
unsafe {
T::regs().isr().modify(|reg| {
reg.set_eos(true);
reg.set_eoc(true);
@ -383,25 +360,22 @@ impl<'d, T: Instance> Adc<'d, T> {
T::regs().dr().read().0 as u16
}
}
pub fn read<P>(&mut self, pin: &mut P) -> u16
where
P: AdcPin<T>,
P: crate::gpio::sealed::Pin,
{
unsafe {
pin.set_as_analog();
self.read_channel(pin.channel())
}
}
pub fn read_internal(&mut self, channel: &mut impl InternalChannel<T>) -> u16 {
unsafe { self.read_channel(channel.channel()) }
self.read_channel(channel.channel())
}
unsafe fn read_channel(&mut self, channel: u8) -> u16 {
fn read_channel(&mut self, channel: u8) -> u16 {
// Configure channel
Self::set_channel_sample_time(channel, self.sample_time);
@ -417,7 +391,7 @@ impl<'d, T: Instance> Adc<'d, T> {
self.convert()
}
unsafe fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
let sample_time = sample_time.into();
if ch <= 9 {
T::regs().smpr(0).modify(|reg| reg.set_smp(ch as _, sample_time));

8
embassy-stm32/src/can/bxcan.rs
View File

@ -20,10 +20,8 @@ impl<'d, T: Instance> Can<'d, T> {
) -> Self {
into_ref!(peri, rx, tx);
unsafe {
rx.set_as_af(rx.af_num(), AFType::Input);
tx.set_as_af(tx.af_num(), AFType::OutputPushPull);
}
T::enable();
T::reset();
@ -42,10 +40,8 @@ impl<'d, T: Instance> Can<'d, T> {
) -> Self {
into_ref!(peri, rx, tx);
unsafe {
rx.set_as_af(rx.af_num(), AFType::Input);
tx.set_as_af(tx.af_num(), AFType::OutputPushPull);
}
T::enable();
T::reset();
@ -60,7 +56,7 @@ impl<'d, T: Instance> Drop for Can<'d, T> {
fn drop(&mut self) {
// Cannot call `free()` because it moves the instance.
// Manually reset the peripheral.
unsafe { T::regs().mcr().write(|w| w.set_reset(true)) }
T::regs().mcr().write(|w| w.set_reset(true));
T::disable();
}
}
@ -98,7 +94,7 @@ unsafe impl<'d, T: Instance> bxcan::Instance for BxcanInstance<'d, T> {
foreach_peripheral!(
(can, $inst:ident) => {
impl sealed::Instance for peripherals::$inst {
const REGISTERS: *mut bxcan::RegisterBlock = crate::pac::$inst.0 as *mut _;
const REGISTERS: *mut bxcan::RegisterBlock = crate::pac::$inst.as_ptr() as *mut _;
fn regs() -> &'static crate::pac::can::Can {
&crate::pac::$inst

8
embassy-stm32/src/crc/v1.rs
View File

@ -27,26 +27,24 @@ impl<'d> Crc<'d> {
/// Resets the CRC unit to default value (0xFFFF_FFFF)
pub fn reset(&mut self) {
unsafe { PAC_CRC.cr().write(|w| w.set_reset(true)) };
PAC_CRC.cr().write(|w| w.set_reset(true));
}
/// Feeds a word to the peripheral and returns the current CRC value
pub fn feed_word(&mut self, word: u32) -> u32 {
// write a single byte to the device, and return the result
unsafe {
PAC_CRC.dr().write_value(word);
}
self.read()
}
/// Feed a slice of words to the peripheral and return the result.
pub fn feed_words(&mut self, words: &[u32]) -> u32 {
for word in words {
unsafe { PAC_CRC.dr().write_value(*word) }
PAC_CRC.dr().write_value(*word);
}
self.read()
}
pub fn read(&self) -> u32 {
unsafe { PAC_CRC.dr().read() }
PAC_CRC.dr().read()
}
}

24
embassy-stm32/src/crc/v2v3.rs
View File

@ -85,14 +85,11 @@ impl<'d> Crc<'d> {
}
pub fn reset(&mut self) {
unsafe {
PAC_CRC.cr().modify(|w| w.set_reset(true));
}
}
/// Reconfigures the CRC peripheral. Doesn't reset.
fn reconfigure(&mut self) {
unsafe {
// Init CRC value
PAC_CRC.init().write_value(self._config.crc_init_value);
#[cfg(crc_v3)]
@ -121,59 +118,46 @@ impl<'d> Crc<'d> {
PolySize::Width16 => vals::Polysize::POLYSIZE16,
PolySize::Width32 => vals::Polysize::POLYSIZE32,
});
})
}
});
self.reset();
}
/// Feeds a byte into the CRC peripheral. Returns the computed checksum.
pub fn feed_byte(&mut self, byte: u8) -> u32 {
unsafe {
PAC_CRC.dr8().write_value(byte);
PAC_CRC.dr().read()
}
}
/// Feeds an slice of bytes into the CRC peripheral. Returns the computed checksum.
pub fn feed_bytes(&mut self, bytes: &[u8]) -> u32 {
for byte in bytes {
unsafe {
PAC_CRC.dr8().write_value(*byte);
}
}
unsafe { PAC_CRC.dr().read() }
PAC_CRC.dr().read()
}
/// Feeds a halfword into the CRC peripheral. Returns the computed checksum.
pub fn feed_halfword(&mut self, halfword: u16) -> u32 {
unsafe {
PAC_CRC.dr16().write_value(halfword);
PAC_CRC.dr().read()
}
}
/// Feeds an slice of halfwords into the CRC peripheral. Returns the computed checksum.
pub fn feed_halfwords(&mut self, halfwords: &[u16]) -> u32 {
for halfword in halfwords {
unsafe {
PAC_CRC.dr16().write_value(*halfword);
}
}
unsafe { PAC_CRC.dr().read() }
PAC_CRC.dr().read()
}
/// Feeds a words into the CRC peripheral. Returns the computed checksum.
pub fn feed_word(&mut self, word: u32) -> u32 {
unsafe {
PAC_CRC.dr().write_value(word as u32);
PAC_CRC.dr().read()
}
}
/// Feeds an slice of words into the CRC peripheral. Returns the computed checksum.
pub fn feed_words(&mut self, words: &[u32]) -> u32 {
for word in words {
unsafe {
PAC_CRC.dr().write_value(*word as u32);
}
}
unsafe { PAC_CRC.dr().read() }
PAC_CRC.dr().read()
}
}

38
embassy-stm32/src/dac.rs
View File

@ -121,13 +121,11 @@ impl<'d, T: Instance> Dac<'d, T> {
T::enable();
T::reset();
unsafe {
T::regs().cr().modify(|reg| {
for ch in 0..channels {
reg.set_en(ch as usize, true);
}
});
}
Self { channels, _peri: peri }
}
@ -143,11 +141,9 @@ impl<'d, T: Instance> Dac<'d, T> {
fn set_channel_enable(&mut self, ch: Channel, on: bool) -> Result<(), Error> {
self.check_channel_exists(ch)?;
unsafe {
T::regs().cr().modify(|reg| {
reg.set_en(ch.index(), on);
})
}
});
Ok(())
}
@ -162,56 +158,42 @@ impl<'d, T: Instance> Dac<'d, T> {
pub fn select_trigger_ch1(&mut self, trigger: Ch1Trigger) -> Result<(), Error> {
self.check_channel_exists(Channel::Ch1)?;
unwrap!(self.disable_channel(Channel::Ch1));
unsafe {
T::regs().cr().modify(|reg| {
reg.set_tsel1(trigger.tsel());
})
}
});
Ok(())
}
pub fn select_trigger_ch2(&mut self, trigger: Ch2Trigger) -> Result<(), Error> {
self.check_channel_exists(Channel::Ch2)?;
unwrap!(self.disable_channel(Channel::Ch2));
unsafe {
T::regs().cr().modify(|reg| {
reg.set_tsel2(trigger.tsel());
})
}
});
Ok(())
}
pub fn trigger(&mut self, ch: Channel) -> Result<(), Error> {
self.check_channel_exists(ch)?;
unsafe {
T::regs().swtrigr().write(|reg| {
reg.set_swtrig(ch.index(), true);
});
}
Ok(())
}
pub fn trigger_all(&mut self) {
unsafe {
T::regs().swtrigr().write(|reg| {
reg.set_swtrig(Channel::Ch1.index(), true);
reg.set_swtrig(Channel::Ch2.index(), true);
})
}
});
}
pub fn set(&mut self, ch: Channel, value: Value) -> Result<(), Error> {
self.check_channel_exists(ch)?;
match value {
Value::Bit8(v) => unsafe {
T::regs().dhr8r(ch.index()).write(|reg| reg.set_dhr(v));
},
Value::Bit12(v, Alignment::Left) => unsafe {
T::regs().dhr12l(ch.index()).write(|reg| reg.set_dhr(v));
},
Value::Bit12(v, Alignment::Right) => unsafe {
T::regs().dhr12r(ch.index()).write(|reg| reg.set_dhr(v));
},
Value::Bit8(v) => T::regs().dhr8r(ch.index()).write(|reg| reg.set_dhr(v)),
Value::Bit12(v, Alignment::Left) => T::regs().dhr12l(ch.index()).write(|reg| reg.set_dhr(v)),
Value::Bit12(v, Alignment::Right) => T::regs().dhr12r(ch.index()).write(|reg| reg.set_dhr(v)),
}
Ok(())
}
@ -239,20 +221,20 @@ foreach_peripheral!(
}
fn reset() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.apb1lrstr().modify(|w| w.set_dac12rst(true));
crate::pac::RCC.apb1lrstr().modify(|w| w.set_dac12rst(false));
})
}
fn enable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.apb1lenr().modify(|w| w.set_dac12en(true));
})
}
fn disable() {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
crate::pac::RCC.apb1lenr().modify(|w| w.set_dac12en(false));
})
}

64
embassy-stm32/src/dcmi.rs
View File

@ -96,8 +96,7 @@ impl Default for Config {
macro_rules! config_pins {
($($pin:ident),*) => {
into_ref!($($pin),*);
// NOTE(unsafe) Exclusive access to the registers
critical_section::with(|_| unsafe {
critical_section::with(|_| {
$(
$pin.set_as_af($pin.af_num(), AFType::Input);
$pin.set_speed(Speed::VeryHigh);
@ -334,7 +333,6 @@ where
T::reset();
T::enable();
unsafe {
peri.regs().cr().modify(|r| {
r.set_cm(true); // disable continuous mode (snapshot mode)
r.set_ess(use_embedded_synchronization);
@ -344,7 +342,6 @@ where
r.set_fcrc(0x00); // capture every frame
r.set_edm(edm); // extended data mode
});
}
T::Interrupt::unpend();
unsafe { T::Interrupt::enable() };
@ -352,7 +349,7 @@ where
Self { inner: peri, dma }
}
unsafe fn toggle(enable: bool) {
fn toggle(enable: bool) {
crate::pac::DCMI.cr().modify(|r| {
r.set_enable(enable);
r.set_capture(enable);
@ -360,24 +357,20 @@ where
}
fn enable_irqs() {
unsafe {
crate::pac::DCMI.ier().modify(|r| {
r.set_err_ie(true);
r.set_ovr_ie(true);
r.set_frame_ie(true);
});
}
}
fn clear_interrupt_flags() {
unsafe {
crate::pac::DCMI.icr().write(|r| {
r.set_ovr_isc(true);
r.set_err_isc(true);
r.set_frame_isc(true);
})
}
}
/// This method starts the capture and finishes when both the dma transfer and DCMI finish the frame transfer.
/// The implication is that the input buffer size must be exactly the size of the captured frame.
@ -392,41 +385,30 @@ where
return self.capture_giant(buffer).await;
}
}
async fn capture_small(&mut self, buffer: &mut [u32]) -> Result<(), Error> {
let r = self.inner.regs();
let src = r.dr().ptr() as *mut u32;
let src = r.dr().as_ptr() as *mut u32;
let request = self.dma.request();
let dma_read = unsafe { Transfer::new_read(&mut self.dma, request, src, buffer, Default::default()) };
Self::clear_interrupt_flags();
Self::enable_irqs();
unsafe { Self::toggle(true) };
Self::toggle(true);
let result = poll_fn(|cx| {
STATE.waker.register(cx.waker());
let ris = unsafe { crate::pac::DCMI.ris().read() };
let ris = crate::pac::DCMI.ris().read();
if ris.err_ris() {
unsafe {
crate::pac::DCMI.icr().write(|r| {
r.set_err_isc(true);
})
};
crate::pac::DCMI.icr().write(|r| r.set_err_isc(true));
Poll::Ready(Err(Error::PeripheralError))
} else if ris.ovr_ris() {
unsafe {
crate::pac::DCMI.icr().write(|r| {
r.set_ovr_isc(true);
})
};
crate::pac::DCMI.icr().write(|r| r.set_ovr_isc(true));
Poll::Ready(Err(Error::Overrun))
} else if ris.frame_ris() {
unsafe {
crate::pac::DCMI.icr().write(|r| {
r.set_frame_isc(true);
})
};
crate::pac::DCMI.icr().write(|r| r.set_frame_isc(true));
Poll::Ready(Ok(()))
} else {
Poll::Pending
@ -435,7 +417,7 @@ where
let (_, result) = embassy_futures::join::join(dma_read, result).await;
unsafe { Self::toggle(false) };
Self::toggle(false);
result
}
@ -468,7 +450,7 @@ where
let request = channel.request();
let r = self.inner.regs();
let src = r.dr().ptr() as *mut u32;
let src = r.dr().as_ptr() as *mut u32;
let mut transfer = unsafe {
crate::dma::DoubleBuffered::new_read(
@ -526,38 +508,26 @@ where
let result = poll_fn(|cx| {
STATE.waker.register(cx.waker());
let ris = unsafe { crate::pac::DCMI.ris().read() };
let ris = crate::pac::DCMI.ris().read();
if ris.err_ris() {
unsafe {
crate::pac::DCMI.icr().write(|r| {
r.set_err_isc(true);
})
};
crate::pac::DCMI.icr().write(|r| r.set_err_isc(true));
Poll::Ready(Err(Error::PeripheralError))
} else if ris.ovr_ris() {
unsafe {
crate::pac::DCMI.icr().write(|r| {
r.set_ovr_isc(true);
})
};
crate::pac::DCMI.icr().write(|r| r.set_ovr_isc(true));
Poll::Ready(Err(Error::Overrun))
} else if ris.frame_ris() {
unsafe {
crate::pac::DCMI.icr().write(|r| {
r.set_frame_isc(true);
})
};
crate::pac::DCMI.icr().write(|r| r.set_frame_isc(true));
Poll::Ready(Ok(()))
} else {
Poll::Pending
}
});
unsafe { Self::toggle(true) };
Self::toggle(true);
let (_, result) = embassy_futures::join::join(dma_result, result).await;
unsafe { Self::toggle(false) };
Self::toggle(false);
result
}

29
embassy-stm32/src/dma/bdma.rs
View File

@ -107,7 +107,7 @@ pub(crate) unsafe fn on_irq_inner(dma: pac::bdma::Dma, channel_num: usize, index
let cr = dma.ch(channel_num).cr();
if isr.teif(channel_num) {
panic!("DMA: error on BDMA@{:08x} channel {}", dma.0 as u32, channel_num);
panic!("DMA: error on BDMA@{:08x} channel {}", dma.as_ptr() as u32, channel_num);
}
if isr.htif(channel_num) && cr.read().htie() {
@ -291,29 +291,25 @@ impl<'a, C: Channel> Transfer<'a, C> {
}
fn clear_irqs(&mut self) {
unsafe {
self.channel.regs().ifcr().write(|w| {
w.set_tcif(self.channel.num(), true);
w.set_teif(self.channel.num(), true);
})
}
});
}
pub fn request_stop(&mut self) {
let ch = self.channel.regs().ch(self.channel.num());
// Disable the channel. Keep the IEs enabled so the irqs still fire.
unsafe {
ch.cr().write(|w| {
w.set_teie(true);
w.set_tcie(true);
})
}
});
}
pub fn is_running(&mut self) -> bool {
let ch = self.channel.regs().ch(self.channel.num());
let en = unsafe { ch.cr().read() }.en();
let en = ch.cr().read().en();
let tcif = STATE.complete_count[self.channel.index()].load(Ordering::Acquire) != 0;
en && !tcif
}
@ -322,11 +318,12 @@ impl<'a, C: Channel> Transfer<'a, C> {
/// Note: this will be zero for transfers that completed without cancellation.
pub fn get_remaining_transfers(&self) -> u16 {
let ch = self.channel.regs().ch(self.channel.num());
unsafe { ch.ndtr().read() }.ndt()
ch.ndtr().read().ndt()
}
pub fn blocking_wait(mut self) {
while self.is_running() {}
self.request_stop();
// "Subsequent reads and writes cannot be moved ahead of preceding reads."
fence(Ordering::SeqCst);
@ -366,7 +363,7 @@ struct DmaCtrlImpl<'a, C: Channel>(PeripheralRef<'a, C>);
impl<'a, C: Channel> DmaCtrl for DmaCtrlImpl<'a, C> {
fn get_remaining_transfers(&self) -> usize {
let ch = self.0.regs().ch(self.0.num());
unsafe { ch.ndtr().read() }.ndt() as usize
ch.ndtr().read().ndt() as usize
}
fn get_complete_count(&self) -> usize {
@ -442,7 +439,7 @@ impl<'a, C: Channel, W: Word> RingBuffer<'a, C, W> {
pub fn start(&mut self) {
let ch = self.channel.regs().ch(self.channel.num());
unsafe { ch.cr().write_value(self.cr) }
ch.cr().write_value(self.cr)
}
pub fn clear(&mut self) {
@ -469,31 +466,27 @@ impl<'a, C: Channel, W: Word> RingBuffer<'a, C, W> {
fn clear_irqs(&mut self) {
let dma = self.channel.regs();
unsafe {
dma.ifcr().write(|w| {
w.set_htif(self.channel.num(), true);
w.set_tcif(self.channel.num(), true);
w.set_teif(self.channel.num(), true);
})
}
});
}
pub fn request_stop(&mut self) {
let ch = self.channel.regs().ch(self.channel.num());
// Disable the channel. Keep the IEs enabled so the irqs still fire.
unsafe {
ch.cr().write(|w| {
w.set_teie(true);
w.set_htie(true);
w.set_tcie(true);
})
}
});
}
pub fn is_running(&mut self) -> bool {
let ch = self.channel.regs().ch(self.channel.num());
unsafe { ch.cr().read() }.en()
ch.cr().read().en()
}
}

42
embassy-stm32/src/dma/dma.rs
View File

@ -183,7 +183,7 @@ pub(crate) unsafe fn on_irq_inner(dma: pac::dma::Dma, channel_num: usize, index:
let isr = dma.isr(channel_num / 4).read();
if isr.teif(channel_num % 4) {
panic!("DMA: error on DMA@{:08x} channel {}", dma.0 as u32, channel_num);
panic!("DMA: error on DMA@{:08x} channel {}", dma.as_ptr() as u32, channel_num);
}
if isr.htif(channel_num % 4) && cr.read().htie() {
@ -387,36 +387,32 @@ impl<'a, C: Channel> Transfer<'a, C> {
let isrn = self.channel.num() / 4;
let isrbit = self.channel.num() % 4;
unsafe {
self.channel.regs().ifcr(isrn).write(|w| {
w.set_tcif(isrbit, true);
w.set_teif(isrbit, true);
})
}
});
}
pub fn request_stop(&mut self) {
let ch = self.channel.regs().st(self.channel.num());
// Disable the channel. Keep the IEs enabled so the irqs still fire.
unsafe {
ch.cr().write(|w| {
w.set_teie(true);
w.set_tcie(true);
})
}
});
}
pub fn is_running(&mut self) -> bool {
let ch = self.channel.regs().st(self.channel.num());
unsafe { ch.cr().read() }.en()
ch.cr().read().en()
}
/// Gets the total remaining transfers for the channel
/// Note: this will be zero for transfers that completed without cancellation.
pub fn get_remaining_transfers(&self) -> u16 {
let ch = self.channel.regs().st(self.channel.num());
unsafe { ch.ndtr().read() }.ndt()
ch.ndtr().read().ndt()
}
pub fn blocking_wait(mut self) {
@ -537,13 +533,11 @@ impl<'a, C: Channel, W: Word> DoubleBuffered<'a, C, W> {
let isrn = channel_number / 4;
let isrbit = channel_number % 4;
unsafe {
dma.ifcr(isrn).write(|w| {
w.set_htif(isrbit, true);
w.set_tcif(isrbit, true);
w.set_teif(isrbit, true);
})
}
});
}
pub unsafe fn set_buffer0(&mut self, buffer: *mut W) {
@ -558,7 +552,7 @@ impl<'a, C: Channel, W: Word> DoubleBuffered<'a, C, W> {
pub fn is_buffer0_accessible(&mut self) -> bool {
let ch = self.channel.regs().st(self.channel.num());
unsafe { ch.cr().read() }.ct() == vals::Ct::MEMORY1
ch.cr().read().ct() == vals::Ct::MEMORY1
}
pub fn set_waker(&mut self, waker: &Waker) {
@ -569,24 +563,22 @@ impl<'a, C: Channel, W: Word> DoubleBuffered<'a, C, W> {
let ch = self.channel.regs().st(self.channel.num());
// Disable the channel. Keep the IEs enabled so the irqs still fire.
unsafe {
ch.cr().write(|w| {
w.set_teie(true);
w.set_tcie(true);
})
}
});
}
pub fn is_running(&mut self) -> bool {
let ch = self.channel.regs().st(self.channel.num());
unsafe { ch.cr().read() }.en()
ch.cr().read().en()
}
/// Gets the total remaining transfers for the channel
/// Note: this will be zero for transfers that completed without cancellation.
pub fn get_remaining_transfers(&self) -> u16 {
let ch = self.channel.regs().st(self.channel.num());
unsafe { ch.ndtr().read() }.ndt()
ch.ndtr().read().ndt()
}
}
@ -607,7 +599,7 @@ struct DmaCtrlImpl<'a, C: Channel>(PeripheralRef<'a, C>);
impl<'a, C: Channel> DmaCtrl for DmaCtrlImpl<'a, C> {
fn get_remaining_transfers(&self) -> usize {
let ch = self.0.regs().st(self.0.num());
unsafe { ch.ndtr().read() }.ndt() as usize
ch.ndtr().read().ndt() as usize
}
fn get_complete_count(&self) -> usize {
@ -698,7 +690,7 @@ impl<'a, C: Channel, W: Word> RingBuffer<'a, C, W> {
pub fn start(&mut self) {
let ch = self.channel.regs().st(self.channel.num());
unsafe { ch.cr().write_value(self.cr) }
ch.cr().write_value(self.cr);
}
pub fn clear(&mut self) {
@ -729,31 +721,27 @@ impl<'a, C: Channel, W: Word> RingBuffer<'a, C, W> {
let isrn = channel_number / 4;
let isrbit = channel_number % 4;
unsafe {
dma.ifcr(isrn).write(|w| {
w.set_htif(isrbit, true);
w.set_tcif(isrbit, true);
w.set_teif(isrbit, true);
})
}
});
}
pub fn request_stop(&mut self) {
let ch = self.channel.regs().st(self.channel.num());
// Disable the channel. Keep the IEs enabled so the irqs still fire.
unsafe {
ch.cr().write(|w| {
w.set_teie(true);
w.set_htie(true);
w.set_tcie(true);
})
}
});
}
pub fn is_running(&mut self) -> bool {
let ch = self.channel.regs().st(self.channel.num());
unsafe { ch.cr().read() }.en()
ch.cr().read().en()
}
}

2
embassy-stm32/src/dma/dmamux.rs
View File

@ -2,7 +2,7 @@
use crate::{pac, peripherals};
pub(crate) unsafe fn configure_dmamux<M: MuxChannel>(channel: &mut M, request: u8) {
pub(crate) fn configure_dmamux<M: MuxChannel>(channel: &mut M, request: u8) {
let ch_mux_regs = channel.mux_regs().ccr(channel.mux_num());
ch_mux_regs.write(|reg| {
reg.set_nbreq(0);

13
embassy-stm32/src/dma/gpdma.rs
View File

@ -92,13 +92,15 @@ pub(crate) unsafe fn on_irq_inner(dma: pac::gpdma::Gpdma, channel_num: usize, in
if sr.dtef() {
panic!(
"DMA: data transfer error on DMA@{:08x} channel {}",
dma.0 as u32, channel_num
dma.as_ptr() as u32,
channel_num
);
}
if sr.usef() {
panic!(
"DMA: user settings error on DMA@{:08x} channel {}",
dma.0 as u32, channel_num
dma.as_ptr() as u32,
channel_num
);
}
@ -250,6 +252,7 @@ impl<'a, C: Channel> Transfer<'a, C> {
super::dmamux::configure_dmamux(&mut *this.channel, request);
ch.cr().write(|w| w.set_reset(true));
ch.fcr().write(|w| w.0 = 0xFFFF_FFFF); // clear all irqs
ch.llr().write(|_| {}); // no linked list
ch.tr1().write(|w| {
w.set_sdw(data_size.into());
@ -298,7 +301,6 @@ impl<'a, C: Channel> Transfer<'a, C> {
let ch = self.channel.regs().ch(self.channel.num());
// Disable the channel. Keep the IEs enabled so the irqs still fire.
unsafe {
ch.cr().write(|w| {
w.set_tcie(true);
w.set_useie(true);
@ -306,18 +308,17 @@ impl<'a, C: Channel> Transfer<'a, C> {
w.set_suspie(true);
})
}
}
pub fn is_running(&mut self) -> bool {
let ch = self.channel.regs().ch(self.channel.num());
!unsafe { ch.sr().read() }.tcf()
!ch.sr().read().tcf()
}
/// Gets the total remaining transfers for the channel
/// Note: this will be zero for transfers that completed without cancellation.
pub fn get_remaining_transfers(&self) -> u16 {
let ch = self.channel.regs().ch(self.channel.num());
unsafe { ch.br1().read() }.bndt()
ch.br1().read().bndt()
}
pub fn blocking_wait(mut self) {

25
embassy-stm32/src/eth/v1/mod.rs
View File

@ -29,7 +29,6 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::ETH> for InterruptHandl
WAKER.wake();
// TODO: Check and clear more flags
unsafe {
let dma = ETH.ethernet_dma();
dma.dmasr().modify(|w| {
@ -41,7 +40,6 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::ETH> for InterruptHandl
dma.dmasr().read();
dma.dmasr().read();
}
}
}
pub struct Ethernet<'d, T: Instance, P: PHY> {
@ -59,7 +57,6 @@ pub struct Ethernet<'d, T: Instance, P: PHY> {
#[cfg(eth_v1a)]
macro_rules! config_in_pins {
($($pin:ident),*) => {
// NOTE(unsafe) Exclusive access to the registers
critical_section::with(|_| {
$(
// TODO properly create a set_as_input function
@ -72,7 +69,6 @@ macro_rules! config_in_pins {
#[cfg(eth_v1a)]
macro_rules! config_af_pins {
($($pin:ident),*) => {
// NOTE(unsafe) Exclusive access to the registers
critical_section::with(|_| {
$(
// We are lucky here, this configures to max speed (50MHz)
@ -85,7 +81,6 @@ macro_rules! config_af_pins {
#[cfg(any(eth_v1b, eth_v1c))]
macro_rules! config_pins {
($($pin:ident),*) => {
// NOTE(unsafe) Exclusive access to the registers
critical_section::with(|_| {
$(
$pin.set_as_af($pin.af_num(), AFType::OutputPushPull);
@ -116,9 +111,7 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
) -> Self {
into_ref!(peri, ref_clk, mdio, mdc, crs, rx_d0, rx_d1, tx_d0, tx_d1, tx_en);
unsafe {
// Enable the necessary Clocks
// NOTE(unsafe) We have exclusive access to the registers
#[cfg(eth_v1a)]
critical_section::with(|_| {
RCC.apb2enr().modify(|w| w.set_afioen(true));
@ -156,7 +149,6 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
#[cfg(any(eth_v1b, eth_v1c))]
config_pins!(ref_clk, mdio, mdc, crs, rx_d0, rx_d1, tx_d0, tx_d1, tx_en);
// NOTE(unsafe) We have exclusive access to the registers
let dma = ETH.ethernet_dma();
let mac = ETH.ethernet_mac();
@ -201,7 +193,7 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
// TODO MTU size setting not found for v1 ethernet, check if correct
// NOTE(unsafe) We got the peripheral singleton, which means that `rcc::init` was called
let hclk = crate::rcc::get_freqs().ahb1;
let hclk = unsafe { crate::rcc::get_freqs() }.ahb1;
let hclk_mhz = hclk.0 / 1_000_000;
// Set the MDC clock frequency in the range 1MHz - 2.5MHz
@ -268,17 +260,14 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
P::phy_init(&mut this);
interrupt::ETH.unpend();
interrupt::ETH.enable();
unsafe { interrupt::ETH.enable() };
this
}
}
}
unsafe impl<'d, T: Instance, P: PHY> StationManagement for Ethernet<'d, T, P> {
fn smi_read(&mut self, reg: u8) -> u16 {
// NOTE(unsafe) These registers aren't used in the interrupt and we have `&mut self`
unsafe {
let mac = ETH.ethernet_mac();
mac.macmiiar().modify(|w| {
@ -291,11 +280,8 @@ unsafe impl<'d, T: Instance, P: PHY> StationManagement for Ethernet<'d, T, P> {
while mac.macmiiar().read().mb() == MbProgress::BUSY {}
mac.macmiidr().read().md()
}
}
fn smi_write(&mut self, reg: u8, val: u16) {
// NOTE(unsafe) These registers aren't used in the interrupt and we have `&mut self`
unsafe {
let mac = ETH.ethernet_mac();
mac.macmiidr().write(|w| w.set_md(val));
@ -308,13 +294,10 @@ unsafe impl<'d, T: Instance, P: PHY> StationManagement for Ethernet<'d, T, P> {
});
while mac.macmiiar().read().mb() == MbProgress::BUSY {}
}
}
}
impl<'d, T: Instance, P: PHY> Drop for Ethernet<'d, T, P> {
fn drop(&mut self) {
// NOTE(unsafe) We have `&mut self` and the interrupt doesn't use this registers
unsafe {
let dma = ETH.ethernet_dma();
let mac = ETH.ethernet_mac();
@ -328,10 +311,8 @@ impl<'d, T: Instance, P: PHY> Drop for Ethernet<'d, T, P> {
});
dma.dmaomr().modify(|w| w.set_sr(DmaomrSr::STOPPED));
}
// NOTE(unsafe) Exclusive access to the regs
critical_section::with(|_| unsafe {
critical_section::with(|_| {
for pin in self.pins.iter_mut() {
pin.set_as_disconnected();
}

7
embassy-stm32/src/eth/v1/rx_desc.rs
View File

@ -146,12 +146,9 @@ impl<'a> RDesRing<'a> {
}
// Register rx descriptor start
// NOTE (unsafe) Used for atomic writes
unsafe {
ETH.ethernet_dma()
.dmardlar()
.write(|w| w.0 = descriptors.as_ptr() as u32);
};
// We already have fences in `set_owned`, which is called in `setup`
Self {
@ -162,12 +159,12 @@ impl<'a> RDesRing<'a> {
}
pub(crate) fn demand_poll(&self) {
unsafe { ETH.ethernet_dma().dmarpdr().write(|w| w.set_rpd(Rpd::POLL)) };
ETH.ethernet_dma().dmarpdr().write(|w| w.set_rpd(Rpd::POLL));
}
/// Get current `RunningState`
fn running_state(&self) -> RunningState {
match unsafe { ETH.ethernet_dma().dmasr().read().rps() } {
match ETH.ethernet_dma().dmasr().read().rps() {
// Reset or Stop Receive Command issued
Rps::STOPPED => RunningState::Stopped,
// Fetching receive transfer descriptor

5
embassy-stm32/src/eth/v1/tx_desc.rs
View File

@ -120,12 +120,9 @@ impl<'a> TDesRing<'a> {
}
// Register txdescriptor start
// NOTE (unsafe) Used for atomic writes
unsafe {
ETH.ethernet_dma()
.dmatdlar()
.write(|w| w.0 = descriptors.as_ptr() as u32);
}
Self {
descriptors,
@ -169,6 +166,6 @@ impl<'a> TDesRing<'a> {
self.index = 0
}
// Request the DMA engine to poll the latest tx descriptor
unsafe { ETH.ethernet_dma().dmatpdr().modify(|w| w.0 = 1) }
ETH.ethernet_dma().dmatpdr().modify(|w| w.0 = 1)
}
}

13
embassy-stm32/src/eth/v2/descriptors.rs
View File

@ -73,14 +73,10 @@ impl<'a> TDesRing<'a> {
// Initialize the pointers in the DMA engine. (There will be a memory barrier later
// before the DMA engine is enabled.)
// NOTE (unsafe) Used for atomic writes
unsafe {
let dma = ETH.ethernet_dma();
dma.dmactx_dlar().write(|w| w.0 = descriptors.as_mut_ptr() as u32);
dma.dmactx_rlr().write(|w| w.set_tdrl((descriptors.len() as u16) - 1));
dma.dmactx_dtpr().write(|w| w.0 = 0);
}
Self {
descriptors,
@ -129,8 +125,7 @@ impl<'a> TDesRing<'a> {
}
// signal DMA it can try again.
// NOTE(unsafe) Atomic write
unsafe { ETH.ethernet_dma().dmactx_dtpr().write(|w| w.0 = 0) }
ETH.ethernet_dma().dmactx_dtpr().write(|w| w.0 = 0)
}
}
@ -199,13 +194,10 @@ impl<'a> RDesRing<'a> {
desc.set_ready(buffers[i].0.as_mut_ptr());
}
unsafe {
let dma = ETH.ethernet_dma();
dma.dmacrx_dlar().write(|w| w.0 = descriptors.as_mut_ptr() as u32);
dma.dmacrx_rlr().write(|w| w.set_rdrl((descriptors.len() as u16) - 1));
dma.dmacrx_dtpr().write(|w| w.0 = 0);
}
Self {
descriptors,
@ -254,8 +246,7 @@ impl<'a> RDesRing<'a> {
fence(Ordering::Release);
// signal DMA it can try again.
// NOTE(unsafe) Atomic write
unsafe { ETH.ethernet_dma().dmacrx_dtpr().write(|w| w.0 = 0) }
ETH.ethernet_dma().dmacrx_dtpr().write(|w| w.0 = 0);
// Increment index.
self.index += 1;

23
embassy-stm32/src/eth/v2/mod.rs
View File

@ -20,7 +20,6 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::ETH> for InterruptHandl
WAKER.wake();
// TODO: Check and clear more flags
unsafe {
let dma = ETH.ethernet_dma();
dma.dmacsr().modify(|w| {
@ -32,7 +31,6 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::ETH> for InterruptHandl
dma.dmacsr().read();
dma.dmacsr().read();
}
}
}
const MTU: usize = 1514; // 14 Ethernet header + 1500 IP packet
@ -50,7 +48,6 @@ pub struct Ethernet<'d, T: Instance, P: PHY> {
macro_rules! config_pins {
($($pin:ident),*) => {
// NOTE(unsafe) Exclusive access to the registers
critical_section::with(|_| {
$(
$pin.set_as_af($pin.af_num(), AFType::OutputPushPull);
@ -80,9 +77,7 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
) -> Self {
into_ref!(peri, ref_clk, mdio, mdc, crs, rx_d0, rx_d1, tx_d0, tx_d1, tx_en);
unsafe {
// Enable the necessary Clocks
// NOTE(unsafe) We have exclusive access to the registers
#[cfg(not(rcc_h5))]
critical_section::with(|_| {
crate::pac::RCC.apb4enr().modify(|w| w.set_syscfgen(true));
@ -114,7 +109,6 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
config_pins!(ref_clk, mdio, mdc, crs, rx_d0, rx_d1, tx_d0, tx_d1, tx_en);
// NOTE(unsafe) We have exclusive access to the registers
let dma = ETH.ethernet_dma();
let mac = ETH.ethernet_mac();
let mtl = ETH.ethernet_mtl();
@ -174,7 +168,7 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
});
// NOTE(unsafe) We got the peripheral singleton, which means that `rcc::init` was called
let hclk = crate::rcc::get_freqs().ahb1;
let hclk = unsafe { crate::rcc::get_freqs() }.ahb1;
let hclk_mhz = hclk.0 / 1_000_000;
// Set the MDC clock frequency in the range 1MHz - 2.5MHz
@ -239,17 +233,14 @@ impl<'d, T: Instance, P: PHY> Ethernet<'d, T, P> {
P::phy_init(&mut this);
interrupt::ETH.unpend();
interrupt::ETH.enable();
unsafe { interrupt::ETH.enable() };
this
}
}
}
unsafe impl<'d, T: Instance, P: PHY> StationManagement for Ethernet<'d, T, P> {
fn smi_read(&mut self, reg: u8) -> u16 {
// NOTE(unsafe) These registers aren't used in the interrupt and we have `&mut self`
unsafe {
let mac = ETH.ethernet_mac();
mac.macmdioar().modify(|w| {
@ -262,11 +253,8 @@ unsafe impl<'d, T: Instance, P: PHY> StationManagement for Ethernet<'d, T, P> {
while mac.macmdioar().read().mb() {}
mac.macmdiodr().read().md()
}
}
fn smi_write(&mut self, reg: u8, val: u16) {
// NOTE(unsafe) These registers aren't used in the interrupt and we have `&mut self`
unsafe {
let mac = ETH.ethernet_mac();
mac.macmdiodr().write(|w| w.set_md(val));
@ -279,13 +267,10 @@ unsafe impl<'d, T: Instance, P: PHY> StationManagement for Ethernet<'d, T, P> {
});
while mac.macmdioar().read().mb() {}
}
}
}
impl<'d, T: Instance, P: PHY> Drop for Ethernet<'d, T, P> {
fn drop(&mut self) {
// NOTE(unsafe) We have `&mut self` and the interrupt doesn't use this registers
unsafe {
let dma = ETH.ethernet_dma();
let mac = ETH.ethernet_mac();
let mtl = ETH.ethernet_mtl();
@ -309,10 +294,8 @@ impl<'d, T: Instance, P: PHY> Drop for Ethernet<'d, T, P> {
rxqueue.rxqsts() != 0b00 || rxqueue.prxq() != 0
} {}
dma.dmacrx_cr().modify(|w| w.set_sr(false));
}
// NOTE(unsafe) Exclusive access to the regs
critical_section::with(|_| unsafe {
critical_section::with(|_| {
for pin in self.pins.iter_mut() {
pin.set_as_disconnected();
}

6
embassy-stm32/src/exti.rs
View File

@ -206,7 +206,7 @@ struct ExtiInputFuture<'a> {
impl<'a> ExtiInputFuture<'a> {
fn new(pin: u8, port: u8, rising: bool, falling: bool) -> Self {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
let pin = pin as usize;
exticr_regs().exticr(pin / 4).modify(|w| w.set_exti(pin % 4, port));
EXTI.rtsr(0).modify(|w| w.set_line(pin, rising));
@ -233,7 +233,7 @@ impl<'a> ExtiInputFuture<'a> {
impl<'a> Drop for ExtiInputFuture<'a> {
fn drop(&mut self) {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
let pin = self.pin as _;
cpu_regs().imr(0).modify(|w| w.set_line(pin, false));
});
@ -246,7 +246,7 @@ impl<'a> Future for ExtiInputFuture<'a> {
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
EXTI_WAKERS[self.pin as usize].register(cx.waker());
let imr = unsafe { cpu_regs().imr(0).read() };
let imr = cpu_regs().imr(0).read();
if !imr.line(self.pin as _) {
Poll::Ready(())
} else {

16
embassy-stm32/src/flash/f4.rs
View File

@ -192,7 +192,7 @@ impl FlashSector {
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f469, stm32f479))]
pub(crate) fn is_default_layout() -> bool {
unsafe { !pac::FLASH.optcr().read().db1m() }
!pac::FLASH.optcr().read().db1m()
}
#[cfg(not(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f469, stm32f479)))]
@ -336,7 +336,7 @@ pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), E
ret
}
pub(crate) unsafe fn clear_all_err() {
pub(crate) fn clear_all_err() {
pac::FLASH.sr().write(|w| {
w.set_pgserr(true);
w.set_pgperr(true);
@ -345,7 +345,7 @@ pub(crate) unsafe fn clear_all_err() {
});
}
pub(crate) async unsafe fn wait_ready() -> Result<(), Error> {
pub(crate) async fn wait_ready() -> Result<(), Error> {
use core::task::Poll;
use futures::future::poll_fn;
@ -391,10 +391,10 @@ fn save_data_cache_state() {
let dual_bank = get_flash_regions().last().unwrap().bank == FlashBank::Bank2;
if dual_bank {
// Disable data cache during write/erase if there are two banks, see errata 2.2.12
let dcen = unsafe { pac::FLASH.acr().read().dcen() };
let dcen = pac::FLASH.acr().read().dcen();
DATA_CACHE_WAS_ENABLED.store(dcen, Ordering::Relaxed);
if dcen {
unsafe { pac::FLASH.acr().modify(|w| w.set_dcen(false)) };
pac::FLASH.acr().modify(|w| w.set_dcen(false));
}
}
}
@ -405,12 +405,10 @@ fn restore_data_cache_state() {
// Restore data cache if it was enabled
let dcen = DATA_CACHE_WAS_ENABLED.load(Ordering::Relaxed);
if dcen {
unsafe {
// Reset data cache before we enable it again
pac::FLASH.acr().modify(|w| w.set_dcrst(true));
pac::FLASH.acr().modify(|w| w.set_dcrst(false));
pac::FLASH.acr().modify(|w| w.set_dcen(true))
};
}
}
}
@ -445,7 +443,7 @@ pub(crate) fn assert_not_corrupted_read(end_address: u32) {
feature = "stm32f439vi",
feature = "stm32f439zi",
))]
if second_bank_read && unsafe { pac::DBGMCU.idcode().read().rev_id() < REVISION_3 && !pa12_is_output_pull_low() } {
if second_bank_read && pac::DBGMCU.idcode().read().rev_id() < REVISION_3 && !pa12_is_output_pull_low() {
panic!("Read corruption for stm32f42xxI and stm32f43xxI when PA12 is in use for chips below revision 3, see errata 2.2.11");
}
@ -479,11 +477,9 @@ fn pa12_is_output_pull_low() -> bool {
use pac::gpio::vals;
use pac::GPIOA;
const PIN: usize = 12;
unsafe {
GPIOA.moder().read().moder(PIN) == vals::Moder::OUTPUT
&& GPIOA.pupdr().read().pupdr(PIN) == vals::Pupdr::PULLDOWN
&& GPIOA.odr().read().odr(PIN) == vals::Odr::LOW
}
}
#[cfg(test)]

8
embassy-stm32/src/fmc.rs
View File

@ -16,7 +16,7 @@ unsafe impl<'d, T> stm32_fmc::FmcPeripheral for Fmc<'d, T>
where
T: Instance,
{
const REGISTERS: *const () = T::REGS.0 as *const _;
const REGISTERS: *const () = T::REGS.as_ptr() as *const _;
fn enable(&mut self) {
<T as crate::rcc::sealed::RccPeripheral>::enable();
@ -28,9 +28,7 @@ where
// fsmc v1, v2 and v3 does not have the fmcen bit
// This is a "not" because it is expected that all future versions have this bit
#[cfg(not(any(fmc_v1x3, fmc_v2x1, fsmc_v1x0, fsmc_v1x3, fsmc_v2x3, fsmc_v3x1)))]
unsafe {
T::REGS.bcr1().modify(|r| r.set_fmcen(true))
};
T::REGS.bcr1().modify(|r| r.set_fmcen(true));
}
fn source_clock_hz(&self) -> u32 {
@ -67,7 +65,7 @@ macro_rules! fmc_sdram_constructor {
chip: CHIP
) -> stm32_fmc::Sdram<Fmc<'d, T>, CHIP> {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
config_pins!(
$($addr_pin_name),*,
$($ba_pin_name),*,

28
embassy-stm32/src/gpio.rs
View File

@ -46,7 +46,7 @@ impl<'d, T: Pin> Flex<'d, T> {
/// Put the pin into input mode.
#[inline]
pub fn set_as_input(&mut self, pull: Pull) {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
let r = self.pin.block();
let n = self.pin.pin() as usize;
#[cfg(gpio_v1)]
@ -84,7 +84,7 @@ impl<'d, T: Pin> Flex<'d, T> {
/// at a specific level, call `set_high`/`set_low` on the pin first.
#[inline]
pub fn set_as_output(&mut self, speed: Speed) {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
let r = self.pin.block();
let n = self.pin.pin() as usize;
#[cfg(gpio_v1)]
@ -116,7 +116,7 @@ impl<'d, T: Pin> Flex<'d, T> {
/// at a specific level, call `set_high`/`set_low` on the pin first.
#[inline]
pub fn set_as_input_output(&mut self, speed: Speed, pull: Pull) {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
let r = self.pin.block();
let n = self.pin.pin() as usize;
#[cfg(gpio_v1)]
@ -147,7 +147,7 @@ impl<'d, T: Pin> Flex<'d, T> {
#[inline]
pub fn is_low(&self) -> bool {
let state = unsafe { self.pin.block().idr().read().idr(self.pin.pin() as _) };
let state = self.pin.block().idr().read().idr(self.pin.pin() as _);
state == vals::Idr::LOW
}
@ -164,7 +164,7 @@ impl<'d, T: Pin> Flex<'d, T> {
/// Is the output pin set as low?
#[inline]
pub fn is_set_low(&self) -> bool {
let state = unsafe { self.pin.block().odr().read().odr(self.pin.pin() as _) };
let state = self.pin.block().odr().read().odr(self.pin.pin() as _);
state == vals::Odr::LOW
}
@ -207,7 +207,7 @@ impl<'d, T: Pin> Flex<'d, T> {
impl<'d, T: Pin> Drop for Flex<'d, T> {
#[inline]
fn drop(&mut self) {
critical_section::with(|_| unsafe {
critical_section::with(|_| {
let r = self.pin.block();
let n = self.pin.pin() as usize;
#[cfg(gpio_v1)]
@ -534,29 +534,25 @@ pub(crate) mod sealed {
/// Set the output as high.
#[inline]
fn set_high(&self) {
unsafe {
let n = self._pin() as _;
self.block().bsrr().write(|w| w.set_bs(n, true));
}
}
/// Set the output as low.
#[inline]
fn set_low(&self) {
unsafe {
let n = self._pin() as _;
self.block().bsrr().write(|w| w.set_br(n, true));
}
}
#[inline]
unsafe fn set_as_af(&self, af_num: u8, af_type: AFType) {
fn set_as_af(&self, af_num: u8, af_type: AFType) {
self.set_as_af_pull(af_num, af_type, Pull::None);
}
#[cfg(gpio_v1)]
#[inline]
unsafe fn set_as_af_pull(&self, _af_num: u8, af_type: AFType, pull: Pull) {
fn set_as_af_pull(&self, _af_num: u8, af_type: AFType, pull: Pull) {
// F1 uses the AFIO register for remapping.
// For now, this is not implemented, so af_num is ignored
// _af_num should be zero here, since it is not set by stm32-data
@ -599,7 +595,7 @@ pub(crate) mod sealed {
#[cfg(gpio_v2)]
#[inline]
unsafe fn set_as_af_pull(&self, af_num: u8, af_type: AFType, pull: Pull) {
fn set_as_af_pull(&self, af_num: u8, af_type: AFType, pull: Pull) {
let pin = self._pin() as usize;
let block = self.block();
block.afr(pin / 8).modify(|w| w.set_afr(pin % 8, af_num));
@ -614,7 +610,7 @@ pub(crate) mod sealed {
}
#[inline]
unsafe fn set_as_analog(&self) {
fn set_as_analog(&self) {
let pin = self._pin() as usize;
let block = self.block();
#[cfg(gpio_v1)]
@ -635,12 +631,12 @@ pub(crate) mod sealed {
/// This is currently the same as set_as_analog but is semantically different really.
/// Drivers should set_as_disconnected pins when dropped.
#[inline]
unsafe fn set_as_disconnected(&self) {
fn set_as_disconnected(&self) {
self.set_as_analog();
}
#[inline]
unsafe fn set_speed(&self, speed: Speed) {
fn set_speed(&self, speed: Speed) {
let pin = self._pin() as usize;
#[cfg(gpio_v1)]

46
embassy-stm32/src/i2c/v1.rs
View File

@ -68,7 +68,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
T::enable();
T::reset();
unsafe {
scl.set_as_af_pull(
scl.af_num(),
AFType::OutputOpenDrain,
@ -85,18 +84,14 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
false => Pull::None,
},
);
}
unsafe {
T::regs().cr1().modify(|reg| {
reg.set_pe(false);
//reg.set_anfoff(false);
});
}
let timings = Timings::new(T::frequency(), freq.into());
unsafe {
T::regs().cr2().modify(|reg| {
reg.set_freq(timings.freq);
});
@ -108,13 +103,10 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
T::regs().trise().modify(|reg| {
reg.set_trise(timings.trise);
});
}
unsafe {
T::regs().cr1().modify(|reg| {
reg.set_pe(true);
});
}
Self {
phantom: PhantomData,
@ -123,7 +115,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
}
}
unsafe fn check_and_clear_error_flags(&self) -> Result<i2c::regs::Sr1, Error> {
fn check_and_clear_error_flags(&self) -> Result<i2c::regs::Sr1, Error> {
// Note that flags should only be cleared once they have been registered. If flags are
// cleared otherwise, there may be an inherent race condition and flags may be missed.
let sr1 = T::regs().sr1().read();
@ -162,7 +154,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
Ok(sr1)
}
unsafe fn write_bytes(
fn write_bytes(
&mut self,
addr: u8,
bytes: &[u8],
@ -211,7 +203,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
Ok(())
}
unsafe fn send_byte(&self, byte: u8, check_timeout: impl Fn() -> Result<(), Error>) -> Result<(), Error> {
fn send_byte(&self, byte: u8, check_timeout: impl Fn() -> Result<(), Error>) -> Result<(), Error> {
// Wait until we're ready for sending
while {
// Check for any I2C errors. If a NACK occurs, the ADDR bit will never be set.
@ -234,7 +226,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
Ok(())
}
unsafe fn recv_byte(&self, check_timeout: impl Fn() -> Result<(), Error>) -> Result<u8, Error> {
fn recv_byte(&self, check_timeout: impl Fn() -> Result<(), Error>) -> Result<u8, Error> {
while {
// Check for any potential error conditions.
self.check_and_clear_error_flags()?;
@ -256,56 +248,52 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
) -> Result<(), Error> {
if let Some((last, buffer)) = buffer.split_last_mut() {
// Send a START condition and set ACK bit
unsafe {
T::regs().cr1().modify(|reg| {
reg.set_start(true);
reg.set_ack(true);
});
}
// Wait until START condition was generated
while unsafe { !self.check_and_clear_error_flags()?.start() } {
while !self.check_and_clear_error_flags()?.start() {
check_timeout()?;
}
// Also wait until signalled we're master and everything is waiting for us
while {
let sr2 = unsafe { T::regs().sr2().read() };
let sr2 = T::regs().sr2().read();
!sr2.msl() && !sr2.busy()
} {
check_timeout()?;
}
// Set up current address, we're trying to talk to
unsafe { T::regs().dr().write(|reg| reg.set_dr((addr << 1) + 1)) }
T::regs().dr().write(|reg| reg.set_dr((addr << 1) + 1));
// Wait until address was sent
// Wait for the address to be acknowledged
while unsafe { !self.check_and_clear_error_flags()?.addr() } {
while !self.check_and_clear_error_flags()?.addr() {
check_timeout()?;
}
// Clear condition by reading SR2
let _ = unsafe { T::regs().sr2().read() };
let _ = T::regs().sr2().read();
// Receive bytes into buffer
for c in buffer {
*c = unsafe { self.recv_byte(&check_timeout)? };
*c = self.recv_byte(&check_timeout)?;
}
// Prepare to send NACK then STOP after next byte
unsafe {
T::regs().cr1().modify(|reg| {
reg.set_ack(false);
reg.set_stop(true);
})
}
});
// Receive last byte
*last = unsafe { self.recv_byte(&check_timeout)? };
*last = self.recv_byte(&check_timeout)?;
// Wait for the STOP to be sent.
while unsafe { T::regs().cr1().read().stop() } {
while T::regs().cr1().read().stop() {
check_timeout()?;
}
@ -326,7 +314,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
write: &[u8],
check_timeout: impl Fn() -> Result<(), Error>,
) -> Result<(), Error> {
unsafe {
self.write_bytes(addr, write, &check_timeout)?;
// Send a STOP condition
T::regs().cr1().modify(|reg| reg.set_stop(true));
@ -334,7 +321,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
while T::regs().cr1().read().stop() {
check_timeout()?;
}
};
// Fallthrough is success
Ok(())
@ -351,7 +337,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
read: &mut [u8],
check_timeout: impl Fn() -> Result<(), Error>,
) -> Result<(), Error> {
unsafe { self.write_bytes(addr, write, &check_timeout)? };
self.write_bytes(addr, write, &check_timeout)?;
self.blocking_read_timeout(addr, read, &check_timeout)?;
Ok(())
@ -478,8 +464,6 @@ impl Timings {
assert!(freq >= 2 && freq <= 50);
// Configure bus frequency into I2C peripheral
//self.i2c.cr2.write(|w| unsafe { w.freq().bits(freq as u8) });
let trise = if speed <= 100_000 {
freq + 1
} else {
@ -539,7 +523,6 @@ impl<'d, T: Instance> SetConfig for I2c<'d, T> {
type Config = Hertz;
fn set_config(&mut self, config: &Self::Config) {
let timings = Timings::new(T::frequency(), *config);
unsafe {
T::regs().cr2().modify(|reg| {
reg.set_freq(timings.freq);
});
@ -552,5 +535,4 @@ impl<'d, T: Instance> SetConfig for I2c<'d, T> {
reg.set_trise(timings.trise);
});
}
}
}

78
embassy-stm32/src/i2c/v2.rs
View File

@ -89,7 +89,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
T::enable();
T::reset();
unsafe {
scl.set_as_af_pull(
scl.af_num(),
AFType::OutputOpenDrain,
@ -106,18 +105,14 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
false => Pull::None,
},
);
}
unsafe {
T::regs().cr1().modify(|reg| {
reg.set_pe(false);
reg.set_anfoff(false);
});
}
let timings = Timings::new(T::frequency(), freq.into());
unsafe {
T::regs().timingr().write(|reg| {
reg.set_presc(timings.prescale);
reg.set_scll(timings.scll);
@ -125,13 +120,10 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
reg.set_sdadel(timings.sdadel);
reg.set_scldel(timings.scldel);
});
}
unsafe {
T::regs().cr1().modify(|reg| {
reg.set_pe(true);
});
}
T::Interrupt::unpend();
unsafe { T::Interrupt::enable() };
@ -144,12 +136,10 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
}
fn master_stop(&mut self) {
unsafe {
T::regs().cr2().write(|w| w.set_stop(true));
}
}
unsafe fn master_read(
fn master_read(
address: u8,
length: usize,
stop: Stop,
@ -191,7 +181,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
Ok(())
}
unsafe fn master_write(
fn master_write(
address: u8,
length: usize,
stop: Stop,
@ -229,7 +219,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
Ok(())
}
unsafe fn master_continue(
fn master_continue(
length: usize,
reload: bool,
check_timeout: impl Fn() -> Result<(), Error>,
@ -259,14 +249,12 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
//$i2c.txdr.write(|w| w.txdata().bits(0));
//}
unsafe {
if T::regs().isr().read().txis() {
T::regs().txdr().write(|w| w.set_txdata(0));
}
if !T::regs().isr().read().txe() {
T::regs().isr().modify(|w| w.set_txe(true))
}
}
// If TXDR is not flagged as empty, write 1 to flush it
//if $i2c.isr.read().txe().is_not_empty() {
@ -276,7 +264,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
fn wait_txe(&self, check_timeout: impl Fn() -> Result<(), Error>) -> Result<(), Error> {
loop {
unsafe {
let isr = T::regs().isr().read();
if isr.txe() {
return Ok(());
@ -291,7 +278,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
self.flush_txdr();
return Err(Error::Nack);
}
}
check_timeout()?;
}
@ -299,7 +285,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
fn wait_rxne(&self, check_timeout: impl Fn() -> Result<(), Error>) -> Result<(), Error> {
loop {
unsafe {
let isr = T::regs().isr().read();
if isr.rxne() {
return Ok(());
@ -314,7 +299,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
self.flush_txdr();
return Err(Error::Nack);
}
}
check_timeout()?;
}
@ -322,7 +306,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
fn wait_tc(&self, check_timeout: impl Fn() -> Result<(), Error>) -> Result<(), Error> {
loop {
unsafe {
let isr = T::regs().isr().read();
if isr.tc() {
return Ok(());
@ -337,7 +320,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
self.flush_txdr();
return Err(Error::Nack);
}
}
check_timeout()?;
}
@ -358,7 +340,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
};
let last_chunk_idx = total_chunks.saturating_sub(1);
unsafe {
Self::master_read(
address,
read.len().min(255),
@ -367,25 +348,19 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
restart,
&check_timeout,
)?;
}
for (number, chunk) in read.chunks_mut(255).enumerate() {
if number != 0 {
// NOTE(unsafe) We have &mut self
unsafe {
Self::master_continue(chunk.len(), number != last_chunk_idx, &check_timeout)?;
}
}
for byte in chunk {
// Wait until we have received something
self.wait_rxne(&check_timeout)?;
unsafe {
*byte = T::regs().rxdr().read().rxdata();
}
}
}
Ok(())
}
@ -407,8 +382,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
// I2C start
//
// ST SAD+W
// NOTE(unsafe) We have &mut self
unsafe {
Self::master_write(
address,
write.len().min(255),
@ -416,15 +389,11 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
last_chunk_idx != 0,
&check_timeout,
)?;
}
for (number, chunk) in write.chunks(255).enumerate() {
if number != 0 {
// NOTE(unsafe) We have &mut self
unsafe {
Self::master_continue(chunk.len(), number != last_chunk_idx, &check_timeout)?;
}
}
for byte in chunk {
// Wait until we are allowed to send data
@ -432,11 +401,9 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
// through)
self.wait_txe(&check_timeout)?;
unsafe {
T::regs().txdr().write(|w| w.set_txdata(*byte));
}
}
}
// Wait until the write finishes
self.wait_tc(&check_timeout)?;
@ -467,7 +434,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
w.set_tcie(true);
}
});
let dst = regs.txdr().ptr() as *mut u8;
let dst = regs.txdr().as_ptr() as *mut u8;
let ch = &mut self.tx_dma;
let request = ch.request();
@ -479,24 +446,20 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
let on_drop = OnDrop::new(|| {
let regs = T::regs();
unsafe {
regs.cr1().modify(|w| {
if last_slice {
w.set_txdmaen(false);
}
w.set_tcie(false);
})
}
});
poll_fn(|cx| {
state.waker.register(cx.waker());
let isr = unsafe { T::regs().isr().read() };
let isr = T::regs().isr().read();
if remaining_len == total_len {
// NOTE(unsafe) self.tx_dma does not fiddle with the i2c registers
if first_slice {
unsafe {
Self::master_write(
address,
total_len.min(255),
@ -504,13 +467,10 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
(total_len > 255) || !last_slice,
&check_timeout,
)?;
}
} else {
unsafe {
Self::master_continue(total_len.min(255), (total_len > 255) || !last_slice, &check_timeout)?;
T::regs().cr1().modify(|w| w.set_tcie(true));
}
}
} else if !(isr.tcr() || isr.tc()) {
// poll_fn was woken without an interrupt present
return Poll::Pending;
@ -519,14 +479,11 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
} else {
let last_piece = (remaining_len <= 255) && last_slice;
// NOTE(unsafe) self.tx_dma does not fiddle with the i2c registers
unsafe {
if let Err(e) = Self::master_continue(remaining_len.min(255), !last_piece, &check_timeout) {
return Poll::Ready(Err(e));
}
T::regs().cr1().modify(|w| w.set_tcie(true));
}
}
remaining_len = remaining_len.saturating_sub(255);
Poll::Pending
@ -564,7 +521,7 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
w.set_rxdmaen(true);
w.set_tcie(true);
});
let src = regs.rxdr().ptr() as *mut u8;
let src = regs.rxdr().as_ptr() as *mut u8;
let ch = &mut self.rx_dma;
let request = ch.request();
@ -576,21 +533,17 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
let on_drop = OnDrop::new(|| {
let regs = T::regs();
unsafe {
regs.cr1().modify(|w| {
w.set_rxdmaen(false);
w.set_tcie(false);
})
}
});
poll_fn(|cx| {
state.waker.register(cx.waker());
let isr = unsafe { T::regs().isr().read() };
let isr = T::regs().isr().read();
if remaining_len == total_len {
// NOTE(unsafe) self.rx_dma does not fiddle with the i2c registers
unsafe {
Self::master_read(
address,
total_len.min(255),
@ -599,7 +552,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
restart,
&check_timeout,
)?;
}
} else if !(isr.tcr() || isr.tc()) {
// poll_fn was woken without an interrupt present
return Poll::Pending;
@ -608,14 +560,11 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
} else {
let last_piece = remaining_len <= 255;
// NOTE(unsafe) self.rx_dma does not fiddle with the i2c registers
unsafe {
if let Err(e) = Self::master_continue(remaining_len.min(255), !last_piece, &check_timeout) {
return Poll::Ready(Err(e));
}
T::regs().cr1().modify(|w| w.set_tcie(true));
}
}
remaining_len = remaining_len.saturating_sub(255);
Poll::Pending
@ -758,8 +707,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
let first_length = write[0].len();
let last_slice_index = write.len() - 1;
// NOTE(unsafe) We have &mut self
unsafe {
Self::master_write(
address,
first_length.min(255),
@ -767,7 +714,6 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
(first_length > 255) || (last_slice_index != 0),
&check_timeout,
)?;
}
for (idx, slice) in write.iter().enumerate() {
let slice_len = slice.len();
@ -780,27 +726,21 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
let last_chunk_idx = total_chunks.saturating_sub(1);
if idx != 0 {
// NOTE(unsafe) We have &mut self
unsafe {
Self::master_continue(
slice_len.min(255),
(idx != last_slice_index) || (slice_len > 255),
&check_timeout,
)?;
}
}
for (number, chunk) in slice.chunks(255).enumerate() {
if number != 0 {
// NOTE(unsafe) We have &mut self
unsafe {
Self::master_continue(
chunk.len(),
(number != last_chunk_idx) || (idx != last_slice_index),
&check_timeout,
)?;
}
}
for byte in chunk {
// Wait until we are allowed to send data
@ -810,12 +750,10 @@ impl<'d, T: Instance, TXDMA, RXDMA> I2c<'d, T, TXDMA, RXDMA> {
// Put byte on the wire
//self.i2c.txdr.write(|w| w.txdata().bits(*byte));
unsafe {
T::regs().txdr().write(|w| w.set_txdata(*byte));
}
}
}
}
// Wait until the write finishes
self.wait_tc(&check_timeout)?;
self.master_stop();
@ -1061,7 +999,6 @@ impl<'d, T: Instance> SetConfig for I2c<'d, T> {
type Config = Hertz;
fn set_config(&mut self, config: &Self::Config) {
let timings = Timings::new(T::frequency(), *config);
unsafe {
T::regs().timingr().write(|reg| {
reg.set_presc(timings.prescale);
reg.set_scll(timings.scll);
@ -1070,5 +1007,4 @@ impl<'d, T: Instance> SetConfig for I2c<'d, T> {
reg.set_scldel(timings.scldel);
});
}
}
}

10
embassy-stm32/src/i2s.rs
View File

@ -153,7 +153,6 @@ impl<'d, T: Instance, Tx, Rx> I2S<'d, T, Tx, Rx> {
) -> Self {
into_ref!(sd, ws, ck, mck);
unsafe {
sd.set_as_af(sd.af_num(), AFType::OutputPushPull);
sd.set_speed(crate::gpio::Speed::VeryHigh);
@ -165,7 +164,6 @@ impl<'d, T: Instance, Tx, Rx> I2S<'d, T, Tx, Rx> {
mck.set_as_af(mck.af_num(), AFType::OutputPushPull);
mck.set_speed(crate::gpio::Speed::VeryHigh);
}
let spi = Spi::new_internal(peri, txdma, rxdma, freq, SpiConfig::default());
@ -178,7 +176,7 @@ impl<'d, T: Instance, Tx, Rx> I2S<'d, T, Tx, Rx> {
let (odd, div) = compute_baud_rate(pclk, freq, config.master_clock, config.format);
#[cfg(any(spi_v1, spi_f1))]
unsafe {
{
use stm32_metapac::spi::vals::{I2scfg, Odd};
// 1. Select the I2SDIV[7:0] bits in the SPI_I2SPR register to define the serial clock baud
@ -232,10 +230,6 @@ impl<'d, T: Instance, Tx, Rx> I2S<'d, T, Tx, Rx> {
w.set_i2se(true)
});
}
#[cfg(spi_v2)]
unsafe {}
#[cfg(any(spi_v3, spi_v4))]
unsafe {}
Self {
_peri: spi,
@ -264,13 +258,11 @@ impl<'d, T: Instance, Tx, Rx> I2S<'d, T, Tx, Rx> {
impl<'d, T: Instance, Tx, Rx> Drop for I2S<'d, T, Tx, Rx> {
fn drop(&mut self) {
unsafe {
self.sd.as_ref().map(|x| x.set_as_disconnected());
self.ws.as_ref().map(|x| x.set_as_disconnected());
self.ck.as_ref().map(|x| x.set_as_disconnected());
self.mck.as_ref().map(|x| x.set_as_disconnected());
}
}
}
// Note, calculation details:

34
embassy-stm32/src/ipcc.rs
View File

@ -26,7 +26,7 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::IPCC_C1_RX> for Receive
];
// Status register gives channel occupied status. For rx, use cpu1.
let sr = unsafe { regs.cpu(1).sr().read() };
let sr = regs.cpu(1).sr().read();
regs.cpu(0).mr().modify(|w| {
for channel in channels {
if sr.chf(channel as usize) {
@ -57,7 +57,7 @@ impl interrupt::typelevel::Handler<interrupt::typelevel::IPCC_C1_TX> for Transmi
];
// Status register gives channel occupied status. For tx, use cpu0.
let sr = unsafe { regs.cpu(0).sr().read() };
let sr = regs.cpu(0).sr().read();
regs.cpu(0).mr().modify(|w| {
for channel in channels {
if !sr.chf(channel as usize) {
@ -98,16 +98,14 @@ impl Ipcc {
IPCC::reset();
IPCC::set_cpu2(true);
unsafe { _configure_pwr() };
_configure_pwr();
let regs = IPCC::regs();
unsafe {
regs.cpu(0).cr().modify(|w| {
w.set_rxoie(true);
w.set_txfie(true);
})
}
});
// enable interrupts
crate::interrupt::typelevel::IPCC_C1_RX::unpend();
@ -128,7 +126,7 @@ impl Ipcc {
compiler_fence(Ordering::SeqCst);
trace!("ipcc: ch {}: send data", channel as u8);
unsafe { regs.cpu(0).scr().write(|w| w.set_chs(channel as usize, true)) }
regs.cpu(0).scr().write(|w| w.set_chs(channel as usize, true));
}
/// Wait for the tx channel to become clear
@ -136,20 +134,20 @@ impl Ipcc {
let regs = IPCC::regs();
// This is a race, but is nice for debugging
if unsafe { regs.cpu(0).sr().read() }.chf(channel as usize) {
if regs.cpu(0).sr().read().chf(channel as usize) {
trace!("ipcc: ch {}: wait for tx free", channel as u8);
}
poll_fn(|cx| {
IPCC::state().tx_waker_for(channel).register(cx.waker());
// If bit is set to 1 then interrupt is disabled; we want to enable the interrupt
unsafe { regs.cpu(0).mr().modify(|w| w.set_chfm(channel as usize, false)) }
regs.cpu(0).mr().modify(|w| w.set_chfm(channel as usize, false));
compiler_fence(Ordering::SeqCst);
if !unsafe { regs.cpu(0).sr().read() }.chf(channel as usize) {
if !regs.cpu(0).sr().read().chf(channel as usize) {
// If bit is set to 1 then interrupt is disabled; we want to disable the interrupt
unsafe { regs.cpu(0).mr().modify(|w| w.set_chfm(channel as usize, true)) }
regs.cpu(0).mr().modify(|w| w.set_chfm(channel as usize, true));
Poll::Ready(())
} else {
@ -165,20 +163,20 @@ impl Ipcc {
loop {
// This is a race, but is nice for debugging
if !unsafe { regs.cpu(1).sr().read() }.chf(channel as usize) {
if !regs.cpu(1).sr().read().chf(channel as usize) {
trace!("ipcc: ch {}: wait for rx occupied", channel as u8);
}
poll_fn(|cx| {
IPCC::state().rx_waker_for(channel).register(cx.waker());
// If bit is set to 1 then interrupt is disabled; we want to enable the interrupt
unsafe { regs.cpu(0).mr().modify(|w| w.set_chom(channel as usize, false)) }
regs.cpu(0).mr().modify(|w| w.set_chom(channel as usize, false));
compiler_fence(Ordering::SeqCst);
if unsafe { regs.cpu(1).sr().read() }.chf(channel as usize) {
if regs.cpu(1).sr().read().chf(channel as usize) {
// If bit is set to 1 then interrupt is disabled; we want to disable the interrupt
unsafe { regs.cpu(0).mr().modify(|w| w.set_chfm(channel as usize, true)) }
regs.cpu(0).mr().modify(|w| w.set_chfm(channel as usize, true));
Poll::Ready(())
} else {
@ -197,7 +195,7 @@ impl Ipcc {
trace!("ipcc: ch {}: clear rx", channel as u8);
compiler_fence(Ordering::SeqCst);
// If the channel is clear and the read function returns none, fetch more data
unsafe { regs.cpu(0).scr().write(|w| w.set_chc(channel as usize, true)) }
regs.cpu(0).scr().write(|w| w.set_chc(channel as usize, true));
}
}
}
@ -208,7 +206,7 @@ impl sealed::Instance for crate::peripherals::IPCC {
}
fn set_cpu2(enabled: bool) {
unsafe { crate::pac::PWR.cr4().modify(|w| w.set_c2boot(enabled)) }
crate::pac::PWR.cr4().modify(|w| w.set_c2boot(enabled));
}
fn state() -> &'static self::sealed::State {
@ -267,7 +265,7 @@ pub(crate) mod sealed {
}
}
unsafe fn _configure_pwr() {
fn _configure_pwr() {
// TODO: move this to RCC
let pwr = crate::pac::PWR;

2
embassy-stm32/src/lib.rs
View File

@ -146,7 +146,6 @@ impl Default for Config {
pub fn init(config: Config) -> Peripherals {
let p = Peripherals::take();
unsafe {
#[cfg(dbgmcu)]
if config.enable_debug_during_sleep {
crate::pac::DBGMCU.cr().modify(|cr| {
@ -175,6 +174,7 @@ pub fn init(config: Config) -> Peripherals {
});
}
unsafe {
gpio::init();
dma::init(
#[cfg(bdma)]

14
embassy-stm32/src/pwm/complementary_pwm.rs
View File

@ -21,7 +21,7 @@ macro_rules! complementary_channel_impl {
impl<'d, Perip: CaptureCompare16bitInstance> ComplementaryPwmPin<'d, Perip, $channel> {
pub fn $new_chx(pin: impl Peripheral<P = impl $complementary_pin_trait<Perip>> + 'd) -> Self {
into_ref!(pin);
critical_section::with(|_| unsafe {
critical_section::with(|_| {
pin.set_low();
pin.set_as_af(pin.af_num(), AFType::OutputPushPull);
#[cfg(gpio_v2)]
@ -72,7 +72,6 @@ impl<'d, T: ComplementaryCaptureCompare16bitInstance> ComplementaryPwm<'d, T> {
this.inner.set_frequency(freq);
this.inner.start();
unsafe {
this.inner.enable_outputs(true);
this.inner
@ -83,46 +82,39 @@ impl<'d, T: ComplementaryCaptureCompare16bitInstance> ComplementaryPwm<'d, T> {
.set_output_compare_mode(Channel::Ch3, OutputCompareMode::PwmMode1);
this.inner
.set_output_compare_mode(Channel::Ch4, OutputCompareMode::PwmMode1);
}
this
}
pub fn enable(&mut self, channel: Channel) {
unsafe {
self.inner.enable_channel(channel, true);
self.inner.enable_complementary_channel(channel, true);
}
}
pub fn disable(&mut self, channel: Channel) {
unsafe {
self.inner.enable_complementary_channel(channel, false);
self.inner.enable_channel(channel, false);
}
}
pub fn set_freq(&mut self, freq: Hertz) {
self.inner.set_frequency(freq);
}
pub fn get_max_duty(&self) -> u16 {
unsafe { self.inner.get_max_compare_value() }
self.inner.get_max_compare_value()
}
pub fn set_duty(&mut self, channel: Channel, duty: u16) {
assert!(duty < self.get_max_duty());
unsafe { self.inner.set_compare_value(channel, duty) }
self.inner.set_compare_value(channel, duty)
}
/// Set the dead time as a proportion of max_duty
pub fn set_dead_time(&mut self, value: u16) {
let (ckd, value) = compute_dead_time_value(value);
unsafe {
self.inner.set_dead_time_clock_division(ckd);
self.inner.set_dead_time_value(value);
}
}
}
fn compute_dead_time_value(value: u16) -> (Ckd, u8) {

58
embassy-stm32/src/pwm/mod.rs
View File

@ -59,33 +59,33 @@ pub(crate) mod sealed {
pub trait CaptureCompare16bitInstance: crate::timer::sealed::GeneralPurpose16bitInstance {
/// Global output enable. Does not do anything on non-advanced timers.
unsafe fn enable_outputs(&mut self, enable: bool);
fn enable_outputs(&mut self, enable: bool);
unsafe fn set_output_compare_mode(&mut self, channel: Channel, mode: OutputCompareMode);
fn set_output_compare_mode(&mut self, channel: Channel, mode: OutputCompareMode);
unsafe fn enable_channel(&mut self, channel: Channel, enable: bool);
fn enable_channel(&mut self, channel: Channel, enable: bool);
unsafe fn set_compare_value(&mut self, channel: Channel, value: u16);
fn set_compare_value(&mut self, channel: Channel, value: u16);
unsafe fn get_max_compare_value(&self) -> u16;
fn get_max_compare_value(&self) -> u16;
}
pub trait ComplementaryCaptureCompare16bitInstance: CaptureCompare16bitInstance {
unsafe fn set_dead_time_clock_division(&mut self, value: Ckd);
fn set_dead_time_clock_division(&mut self, value: Ckd);
unsafe fn set_dead_time_value(&mut self, value: u8);
fn set_dead_time_value(&mut self, value: u8);
unsafe fn enable_complementary_channel(&mut self, channel: Channel, enable: bool);
fn enable_complementary_channel(&mut self, channel: Channel, enable: bool);
}
pub trait CaptureCompare32bitInstance: crate::timer::sealed::GeneralPurpose32bitInstance {
unsafe fn set_output_compare_mode(&mut self, channel: Channel, mode: OutputCompareMode);
fn set_output_compare_mode(&mut self, channel: Channel, mode: OutputCompareMode);
unsafe fn enable_channel(&mut self, channel: Channel, enable: bool);
fn enable_channel(&mut self, channel: Channel, enable: bool);
unsafe fn set_compare_value(&mut self, channel: Channel, value: u32);
fn set_compare_value(&mut self, channel: Channel, value: u32);
unsafe fn get_max_compare_value(&self) -> u32;
fn get_max_compare_value(&self) -> u32;
}
}
@ -108,9 +108,9 @@ pub trait CaptureCompare32bitInstance:
macro_rules! impl_compare_capable_16bit {
($inst:ident) => {
impl crate::pwm::sealed::CaptureCompare16bitInstance for crate::peripherals::$inst {
unsafe fn enable_outputs(&mut self, _enable: bool) {}
fn enable_outputs(&mut self, _enable: bool) {}
unsafe fn set_output_compare_mode(&mut self, channel: crate::pwm::Channel, mode: OutputCompareMode) {
fn set_output_compare_mode(&mut self, channel: crate::pwm::Channel, mode: OutputCompareMode) {
use crate::timer::sealed::GeneralPurpose16bitInstance;
let r = Self::regs_gp16();
let raw_channel: usize = channel.raw();
@ -118,19 +118,19 @@ macro_rules! impl_compare_capable_16bit {
.modify(|w| w.set_ocm(raw_channel % 2, mode.into()));
}
unsafe fn enable_channel(&mut self, channel: Channel, enable: bool) {
fn enable_channel(&mut self, channel: Channel, enable: bool) {
use crate::timer::sealed::GeneralPurpose16bitInstance;
Self::regs_gp16()
.ccer()
.modify(|w| w.set_cce(channel.raw(), enable));
}
unsafe fn set_compare_value(&mut self, channel: Channel, value: u16) {
fn set_compare_value(&mut self, channel: Channel, value: u16) {
use crate::timer::sealed::GeneralPurpose16bitInstance;
Self::regs_gp16().ccr(channel.raw()).modify(|w| w.set_ccr(value));
}
unsafe fn get_max_compare_value(&self) -> u16 {
fn get_max_compare_value(&self) -> u16 {
use crate::timer::sealed::GeneralPurpose16bitInstance;
Self::regs_gp16().arr().read().arr()
}
@ -150,7 +150,7 @@ foreach_interrupt! {
($inst:ident, timer, TIM_GP32, UP, $irq:ident) => {
impl_compare_capable_16bit!($inst);
impl crate::pwm::sealed::CaptureCompare32bitInstance for crate::peripherals::$inst {
unsafe fn set_output_compare_mode(
fn set_output_compare_mode(
&mut self,
channel: crate::pwm::Channel,
mode: OutputCompareMode,
@ -160,17 +160,17 @@ foreach_interrupt! {
Self::regs_gp32().ccmr_output(raw_channel / 2).modify(|w| w.set_ocm(raw_channel % 2, mode.into()));
}
unsafe fn enable_channel(&mut self, channel: Channel, enable: bool) {
fn enable_channel(&mut self, channel: Channel, enable: bool) {
use crate::timer::sealed::GeneralPurpose32bitInstance;
Self::regs_gp32().ccer().modify(|w| w.set_cce(channel.raw(), enable));
}
unsafe fn set_compare_value(&mut self, channel: Channel, value: u32) {
fn set_compare_value(&mut self, channel: Channel, value: u32) {
use crate::timer::sealed::GeneralPurpose32bitInstance;
Self::regs_gp32().ccr(channel.raw()).modify(|w| w.set_ccr(value));
}
unsafe fn get_max_compare_value(&self) -> u32 {
fn get_max_compare_value(&self) -> u32 {
use crate::timer::sealed::GeneralPurpose32bitInstance;
Self::regs_gp32().arr().read().arr() as u32
}
@ -185,13 +185,13 @@ foreach_interrupt! {
($inst:ident, timer, TIM_ADV, UP, $irq:ident) => {
impl crate::pwm::sealed::CaptureCompare16bitInstance for crate::peripherals::$inst {
unsafe fn enable_outputs(&mut self, enable: bool) {
fn enable_outputs(&mut self, enable: bool) {
use crate::timer::sealed::AdvancedControlInstance;
let r = Self::regs_advanced();
r.bdtr().modify(|w| w.set_moe(enable));
}
unsafe fn set_output_compare_mode(
fn set_output_compare_mode(
&mut self,
channel: crate::pwm::Channel,
mode: OutputCompareMode,
@ -203,21 +203,21 @@ foreach_interrupt! {
.modify(|w| w.set_ocm(raw_channel % 2, mode.into()));
}
unsafe fn enable_channel(&mut self, channel: Channel, enable: bool) {
fn enable_channel(&mut self, channel: Channel, enable: bool) {
use crate::timer::sealed::AdvancedControlInstance;
Self::regs_advanced()
.ccer()
.modify(|w| w.set_cce(channel.raw(), enable));
}
unsafe fn set_compare_value(&mut self, channel: Channel, value: u16) {
fn set_compare_value(&mut self, channel: Channel, value: u16) {
use crate::timer::sealed::AdvancedControlInstance;
Self::regs_advanced()
.ccr(channel.raw())
.modify(|w| w.set_ccr(value));
}
unsafe fn get_max_compare_value(&self) -> u16 {
fn get_max_compare_value(&self) -> u16 {
use crate::timer::sealed::AdvancedControlInstance;
Self::regs_advanced().arr().read().arr()
}
@ -228,17 +228,17 @@ foreach_interrupt! {
}
impl crate::pwm::sealed::ComplementaryCaptureCompare16bitInstance for crate::peripherals::$inst {
unsafe fn set_dead_time_clock_division(&mut self, value: Ckd) {
fn set_dead_time_clock_division(&mut self, value: Ckd) {
use crate::timer::sealed::AdvancedControlInstance;
Self::regs_advanced().cr1().modify(|w| w.set_ckd(value));
}
unsafe fn set_dead_time_value(&mut self, value: u8) {
fn set_dead_time_value(&mut self, value: u8) {
use crate::timer::sealed::AdvancedControlInstance;
Self::regs_advanced().bdtr().modify(|w| w.set_dtg(value));
}
unsafe fn enable_complementary_channel(&mut self, channel: Channel, enable: bool) {
fn enable_complementary_channel(&mut self, channel: Channel, enable: bool) {
use crate::timer::sealed::AdvancedControlInstance;
Self::regs_advanced()
.ccer()

12
embassy-stm32/src/pwm/simple_pwm.rs
View File

@ -24,7 +24,7 @@ macro_rules! channel_impl {
impl<'d, Perip: CaptureCompare16bitInstance> PwmPin<'d, Perip, $channel> {
pub fn $new_chx(pin: impl Peripheral<P = impl $pin_trait<Perip>> + 'd) -> Self {
into_ref!(pin);
critical_section::with(|_| unsafe {
critical_section::with(|_| {
pin.set_low();
pin.set_as_af(pin.af_num(), AFType::OutputPushPull);
#[cfg(gpio_v2)]
@ -71,7 +71,6 @@ impl<'d, T: CaptureCompare16bitInstance> SimplePwm<'d, T> {
this.inner.set_frequency(freq);
this.inner.start();
unsafe {
this.inner.enable_outputs(true);
this.inner
@ -82,32 +81,27 @@ impl<'d, T: CaptureCompare16bitInstance> SimplePwm<'d, T> {
.set_output_compare_mode(Channel::Ch3, OutputCompareMode::PwmMode1);
this.inner
.set_output_compare_mode(Channel::Ch4, OutputCompareMode::PwmMode1);
}
this
}
pub fn enable(&mut self, channel: Channel) {
unsafe {
self.inner.enable_channel(channel, true);
}
}
pub fn disable(&mut self, channel: Channel) {
unsafe {
self.inner.enable_channel(channel, false);
}
}
pub fn set_freq(&mut self, freq: Hertz) {
self.inner.set_frequency(freq);
}
pub fn get_max_duty(&self) -> u16 {
unsafe { self.inner.get_max_compare_value() }
self.inner.get_max_compare_value()
}
pub fn set_duty(&mut self, channel: Channel, duty: u16) {
assert!(duty < self.get_max_duty());
unsafe { self.inner.set_compare_value(channel, duty) }
self.inner.set_compare_value(channel, duty)
}
}

36
embassy-stm32/src/qspi/mod.rs
View File

@ -96,7 +96,6 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
) -> Self {
into_ref!(peri, d0, d1, d2, d3, sck, nss);
unsafe {
sck.set_as_af(sck.af_num(), AFType::OutputPushPull);
sck.set_speed(crate::gpio::Speed::VeryHigh);
nss.set_as_af(nss.af_num(), AFType::OutputPushPull);
@ -109,7 +108,6 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
d2.set_speed(crate::gpio::Speed::VeryHigh);
d3.set_as_af(d3.af_num(), AFType::OutputPushPull);
d3.set_speed(crate::gpio::Speed::VeryHigh);
}
Self::new_inner(
peri,
@ -138,7 +136,6 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
into_ref!(peri, dma);
T::enable();
unsafe {
T::REGS.cr().write(|w| w.set_fthres(config.fifo_threshold.into()));
while T::REGS.sr().read().busy() {}
@ -152,7 +149,6 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
w.set_csht(config.cs_high_time.into());
w.set_ckmode(false);
});
}
Self {
_peri: peri,
@ -168,17 +164,14 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
}
pub fn command(&mut self, transaction: TransferConfig) {
unsafe {
T::REGS.cr().modify(|v| v.set_dmaen(false));
self.setup_transaction(QspiMode::IndirectWrite, &transaction);
while !T::REGS.sr().read().tcf() {}
T::REGS.fcr().modify(|v| v.set_ctcf(true));
}
}
pub fn blocking_read(&mut self, buf: &mut [u8], transaction: TransferConfig) {
unsafe {
T::REGS.cr().modify(|v| v.set_dmaen(false));
self.setup_transaction(QspiMode::IndirectWrite, &transaction);
@ -193,17 +186,15 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
for idx in 0..len {
while !T::REGS.sr().read().tcf() && !T::REGS.sr().read().ftf() {}
buf[idx] = *(T::REGS.dr().ptr() as *mut u8);
buf[idx] = unsafe { (T::REGS.dr().as_ptr() as *mut u8).read_volatile() };
}
}
while !T::REGS.sr().read().tcf() {}
T::REGS.fcr().modify(|v| v.set_ctcf(true));
}
}
pub fn blocking_write(&mut self, buf: &[u8], transaction: TransferConfig) {
unsafe {
T::REGS.cr().modify(|v| v.set_dmaen(false));
self.setup_transaction(QspiMode::IndirectWrite, &transaction);
@ -214,20 +205,18 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
for idx in 0..len {
while !T::REGS.sr().read().ftf() {}
*(T::REGS.dr().ptr() as *mut u8) = buf[idx];
unsafe { (T::REGS.dr().as_ptr() as *mut u8).write_volatile(buf[idx]) };
}
}
while !T::REGS.sr().read().tcf() {}
T::REGS.fcr().modify(|v| v.set_ctcf(true));
}
}
pub fn blocking_read_dma(&mut self, buf: &mut [u8], transaction: TransferConfig)
where
Dma: QuadDma<T>,
{
unsafe {
self.setup_transaction(QspiMode::IndirectWrite, &transaction);
T::REGS.ccr().modify(|v| {
@ -239,25 +228,25 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
});
let request = self.dma.request();
let transfer = Transfer::new_read(
let transfer = unsafe {
Transfer::new_read(
&mut self.dma,
request,
T::REGS.dr().ptr() as *mut u8,
T::REGS.dr().as_ptr() as *mut u8,
buf,
Default::default(),
);
)
};
T::REGS.cr().modify(|v| v.set_dmaen(true));
transfer.blocking_wait();
}
}
pub fn blocking_write_dma(&mut self, buf: &[u8], transaction: TransferConfig)
where
Dma: QuadDma<T>,
{
unsafe {
self.setup_transaction(QspiMode::IndirectWrite, &transaction);
T::REGS.ccr().modify(|v| {
@ -265,22 +254,22 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
});
let request = self.dma.request();
let transfer = Transfer::new_write(
let transfer = unsafe {
Transfer::new_write(
&mut self.dma,
request,
buf,
T::REGS.dr().ptr() as *mut u8,
T::REGS.dr().as_ptr() as *mut u8,
Default::default(),
);
)
};
T::REGS.cr().modify(|v| v.set_dmaen(true));
transfer.blocking_wait();
}
}
fn setup_transaction(&mut self, fmode: QspiMode, transaction: &TransferConfig) {
unsafe {
T::REGS.fcr().modify(|v| {
v.set_csmf(true);
v.set_ctcf(true);
@ -311,7 +300,6 @@ impl<'d, T: Instance, Dma> Qspi<'d, T, Dma> {
});
}
}
}
}
pub(crate) mod sealed {

16
embassy-stm32/src/rcc/f4.rs
View File

@ -36,18 +36,18 @@ pub struct Config {
}
#[cfg(stm32f410)]
unsafe fn setup_i2s_pll(_vco_in: u32, _plli2s: Option<u32>) -> Option<u32> {
fn setup_i2s_pll(_vco_in: u32, _plli2s: Option<u32>) -> Option<u32> {
None
}
// Not currently implemented, but will be in the future
#[cfg(any(stm32f411, stm32f412, stm32f413, stm32f423, stm32f446))]
unsafe fn setup_i2s_pll(_vco_in: u32, _plli2s: Option<u32>) -> Option<u32> {
fn setup_i2s_pll(_vco_in: u32, _plli2s: Option<u32>) -> Option<u32> {
None
}
#[cfg(not(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423, stm32f446)))]
unsafe fn setup_i2s_pll(vco_in: u32, plli2s: Option<u32>) -> Option<u32> {
fn setup_i2s_pll(vco_in: u32, plli2s: Option<u32>) -> Option<u32> {
let min_div = 2;
let max_div = 7;
let target = match plli2s {
@ -82,13 +82,7 @@ unsafe fn setup_i2s_pll(vco_in: u32, plli2s: Option<u32>) -> Option<u32> {
Some(output)
}
unsafe fn setup_pll(
pllsrcclk: u32,
use_hse: bool,
pllsysclk: Option<u32>,
plli2s: Option<u32>,
pll48clk: bool,
) -> PllResults {
fn setup_pll(pllsrcclk: u32, use_hse: bool, pllsysclk: Option<u32>, plli2s: Option<u32>, pll48clk: bool) -> PllResults {
use crate::pac::rcc::vals::{Pllp, Pllsrc};
let sysclk = pllsysclk.unwrap_or(pllsrcclk);
@ -320,7 +314,7 @@ impl<'d, T: McoInstance> Mco<'d, T> {
}
}
unsafe fn flash_setup(sysclk: u32) {
fn flash_setup(sysclk: u32) {
use crate::pac::flash::vals::Latency;
// Be conservative with voltage ranges

4
embassy-stm32/src/rcc/f7.rs
View File

@ -25,7 +25,7 @@ pub struct Config {
pub pll48: bool,
}
unsafe fn setup_pll(pllsrcclk: u32, use_hse: bool, pllsysclk: Option<u32>, pll48clk: bool) -> PllResults {
fn setup_pll(pllsrcclk: u32, use_hse: bool, pllsysclk: Option<u32>, pll48clk: bool) -> PllResults {
use crate::pac::rcc::vals::{Pllp, Pllsrc};
let sysclk = pllsysclk.unwrap_or(pllsrcclk);
@ -97,7 +97,7 @@ unsafe fn setup_pll(pllsrcclk: u32, use_hse: bool, pllsysclk: Option<u32>, pll48
}
}
unsafe fn flash_setup(sysclk: u32) {
fn flash_setup(sysclk: u32) {
use crate::pac::flash::vals::Latency;
// Be conservative with voltage ranges

2
embassy-stm32/src/rcc/g0.rs
View File

@ -245,7 +245,7 @@ impl Default for Config {
}
impl PllConfig {
pub(crate) unsafe fn init(self) -> u32 {
pub(crate) fn init(self) -> u32 {
assert!(self.n >= 8 && self.n <= 86);
let (src, input_freq) = match self.source {
PllSrc::HSI16 => (vals::Pllsrc::HSI16, HSI_FREQ.0),

5
embassy-stm32/src/rcc/h5.rs
View File

@ -462,7 +462,7 @@ struct PllOutput {
r: Option<Hertz>,
}
unsafe fn init_pll(num: usize, config: Option<Pll>, input: &PllInput) -> PllOutput {
fn init_pll(num: usize, config: Option<Pll>, input: &PllInput) -> PllOutput {
let Some(config) = config else {
// Stop PLL
RCC.cr().modify(|w| w.set_pllon(num, false));
@ -595,12 +595,9 @@ fn flash_setup(clk: Hertz, vos: VoltageScale) {
defmt::debug!("flash: latency={} wrhighfreq={}", latency, wrhighfreq);
// NOTE(unsafe) Atomic write
unsafe {
FLASH.acr().write(|w| {
w.set_wrhighfreq(wrhighfreq);
w.set_latency(latency);
});
while FLASH.acr().read().latency() != latency {}
}
}

12
embassy-stm32/src/rcc/h7.rs
View File

@ -253,14 +253,11 @@ fn flash_setup(rcc_aclk: u32, vos: VoltageScale) {
},
};
// NOTE(unsafe) Atomic write
unsafe {
FLASH.acr().write(|w| {
w.set_wrhighfreq(progr_delay);
w.set_latency(wait_states)
});
while FLASH.acr().read().latency() != wait_states {}
}
}
pub enum McoClock {
@ -474,7 +471,6 @@ pub(crate) unsafe fn init(mut config: Config) {
// Configure traceclk from PLL if needed
traceclk_setup(&mut config, sys_use_pll1_p);
// NOTE(unsafe) We have exclusive access to the RCC
let (pll1_p_ck, pll1_q_ck, pll1_r_ck) = pll::pll_setup(srcclk.0, &config.pll1, 0);
let (pll2_p_ck, pll2_q_ck, pll2_r_ck) = pll::pll_setup(srcclk.0, &config.pll2, 1);
let (pll3_p_ck, pll3_q_ck, pll3_r_ck) = pll::pll_setup(srcclk.0, &config.pll3, 2);
@ -756,7 +752,7 @@ mod pll {
/// # Safety
///
/// Must have exclusive access to the RCC register block
unsafe fn vco_setup(pll_src: u32, requested_output: u32, plln: usize) -> PllConfigResults {
fn vco_setup(pll_src: u32, requested_output: u32, plln: usize) -> PllConfigResults {
use crate::pac::rcc::vals::{Pllrge, Pllvcosel};
let (vco_ck_target, pll_x_p) = vco_output_divider_setup(requested_output, plln);
@ -785,11 +781,7 @@ mod pll {
/// # Safety
///
/// Must have exclusive access to the RCC register block
pub(super) unsafe fn pll_setup(
pll_src: u32,
config: &PllConfig,
plln: usize,
) -> (Option<u32>, Option<u32>, Option<u32>) {
pub(super) fn pll_setup(pll_src: u32, config: &PllConfig, plln: usize) -> (Option<u32>, Option<u32>, Option<u32>) {
use crate::pac::rcc::vals::Divp;
match config.p_ck {

18
embassy-stm32/src/rng.rs
View File

@ -34,10 +34,9 @@ impl<'d, T: Instance> Rng<'d, T> {
pub fn reset(&mut self) {
// rng_v2 locks up on seed error, needs reset
#[cfg(rng_v2)]
if unsafe { T::regs().sr().read().seis() } {
if T::regs().sr().read().seis() {
T::reset();
}
unsafe {
T::regs().cr().modify(|reg| {
reg.set_rngen(true);
reg.set_ie(true);
@ -46,28 +45,23 @@ impl<'d, T: Instance> Rng<'d, T> {
reg.set_seis(false);
reg.set_ceis(false);
});
}
// Reference manual says to discard the first.
let _ = self.next_u32();
}
pub async fn async_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
unsafe {
T::regs().cr().modify(|reg| {
reg.set_rngen(true);
})
}
});
for chunk in dest.chunks_mut(4) {
poll_fn(|cx| {
RNG_WAKER.register(cx.waker());
unsafe {
T::regs().cr().modify(|reg| {
reg.set_ie(true);
});
}
let bits = unsafe { T::regs().sr().read() };
let bits = T::regs().sr().read();
if bits.drdy() {
Poll::Ready(Ok(()))
@ -82,7 +76,7 @@ impl<'d, T: Instance> Rng<'d, T> {
}
})
.await?;
let random_bytes = unsafe { T::regs().dr().read() }.to_be_bytes();
let random_bytes = T::regs().dr().read().to_be_bytes();
for (dest, src) in chunk.iter_mut().zip(random_bytes.iter()) {
*dest = *src
}
@ -95,11 +89,11 @@ impl<'d, T: Instance> Rng<'d, T> {
impl<'d, T: Instance> RngCore for Rng<'d, T> {
fn next_u32(&mut self) -> u32 {
loop {
let sr = unsafe { T::regs().sr().read() };
let sr = T::regs().sr().read();
if sr.seis() | sr.ceis() {
self.reset();
} else if sr.drdy() {
return unsafe { T::regs().dr().read() };
return T::regs().dr().read();
}
}
}

2
embassy-stm32/src/rtc/datetime.rs
View File

@ -154,7 +154,6 @@ pub(super) fn write_date_time(rtc: &Rtc, t: DateTime) {
let yr_offset = (yr - 1970_u16) as u8;
let (yt, yu) = byte_to_bcd2(yr_offset);
unsafe {
use crate::pac::rtc::vals::Ampm;
rtc.tr().write(|w| {
@ -176,7 +175,6 @@ pub(super) fn write_date_time(rtc: &Rtc, t: DateTime) {
w.set_yu(yu);
w.set_wdu(day_of_week_to_u8(t.day_of_week));
});
}
}
pub(super) fn datetime(

10
embassy-stm32/src/rtc/mod.rs
View File

@ -113,7 +113,7 @@ impl Default for RtcCalibrationCyclePeriod {
impl<'d, T: Instance> Rtc<'d, T> {
pub fn new(_rtc: impl Peripheral<P = T> + 'd, rtc_config: RtcConfig) -> Self {
unsafe { T::enable_peripheral_clk() };
T::enable_peripheral_clk();
let mut rtc_struct = Self {
phantom: PhantomData,
@ -144,7 +144,6 @@ impl<'d, T: Instance> Rtc<'d, T> {
/// Will return an `RtcError::InvalidDateTime` if the stored value in the system is not a valid [`DayOfWeek`].
pub fn now(&self) -> Result<DateTime, RtcError> {
let r = T::regs();
unsafe {
let tr = r.tr().read();
let second = bcd2_to_byte((tr.st(), tr.su()));
let minute = bcd2_to_byte((tr.mnt(), tr.mnu()));
@ -160,18 +159,17 @@ impl<'d, T: Instance> Rtc<'d, T> {
self::datetime::datetime(year, month, day, weekday, hour, minute, second).map_err(RtcError::InvalidDateTime)
}
}
/// Check if daylight savings time is active.
pub fn get_daylight_savings(&self) -> bool {
let cr = unsafe { T::regs().cr().read() };
let cr = T::regs().cr().read();
cr.bkp()
}
/// Enable/disable daylight savings time.
pub fn set_daylight_savings(&mut self, daylight_savings: bool) {
self.write(true, |rtc| {
unsafe { rtc.cr().modify(|w| w.set_bkp(daylight_savings)) };
rtc.cr().modify(|w| w.set_bkp(daylight_savings));
})
}
@ -228,7 +226,7 @@ pub(crate) mod sealed {
crate::pac::RTC
}
unsafe fn enable_peripheral_clk() {}
fn enable_peripheral_clk() {}
/// Read content of the backup register.
///

16
embassy-stm32/src/rtc/v2.rs
View File

@ -8,7 +8,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
/// It this changes the RTC clock source the time will be reset
pub(super) fn apply_config(&mut self, rtc_config: RtcConfig) {
// Unlock the backup domain
unsafe {
let clock_config = rtc_config.clock_config as u8;
#[cfg(not(rtc_v2wb))]
@ -73,9 +72,8 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
w.set_lsebyp(reg.lsebyp());
});
}
}
self.write(true, |rtc| unsafe {
self.write(true, |rtc| {
rtc.cr().modify(|w| {
#[cfg(rtc_v2f2)]
w.set_fmt(false);
@ -117,7 +115,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
clock_drift = clock_drift / RTC_CALR_RESOLUTION_PPM;
self.write(false, |rtc| {
unsafe {
rtc.calr().write(|w| {
match period {
super::RtcCalibrationCyclePeriod::Seconds8 => {
@ -157,7 +154,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
w.set_calm((clock_drift * -1.0) as u16);
}
});
}
})
}
@ -168,7 +164,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
let r = T::regs();
// Disable write protection.
// This is safe, as we're only writin the correct and expected values.
unsafe {
r.wpr().write(|w| w.set_key(0xca));
r.wpr().write(|w| w.set_key(0x53));
@ -180,11 +175,9 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
// ~2 RTCCLK cycles
while !r.isr().read().initf() {}
}
}
let result = f(&r);
unsafe {
if init_mode {
r.isr().modify(|w| w.set_init(Init::FREERUNNINGMODE)); // Exits init mode
}
@ -192,7 +185,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
// Re-enable write protection.
// This is safe, as the field accepts the full range of 8-bit values.
r.wpr().write(|w| w.set_key(0xff));
}
result
}
}
@ -200,7 +192,7 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
impl sealed::Instance for crate::peripherals::RTC {
const BACKUP_REGISTER_COUNT: usize = 20;
unsafe fn enable_peripheral_clk() {
fn enable_peripheral_clk() {
#[cfg(any(rtc_v2l4, rtc_v2wb))]
{
// enable peripheral clock for communication
@ -213,7 +205,7 @@ impl sealed::Instance for crate::peripherals::RTC {
fn read_backup_register(rtc: &Rtc, register: usize) -> Option<u32> {
if register < Self::BACKUP_REGISTER_COUNT {
Some(unsafe { rtc.bkpr(register).read().bkp() })
Some(rtc.bkpr(register).read().bkp())
} else {
None
}
@ -221,7 +213,7 @@ impl sealed::Instance for crate::peripherals::RTC {
fn write_backup_register(rtc: &Rtc, register: usize, value: u32) {
if register < Self::BACKUP_REGISTER_COUNT {
unsafe { rtc.bkpr(register).write(|w| w.set_bkp(value)) }
rtc.bkpr(register).write(|w| w.set_bkp(value));
}
}
}

13
embassy-stm32/src/rtc/v3.rs
View File

@ -8,7 +8,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
/// It this changes the RTC clock source the time will be reset
pub(super) fn apply_config(&mut self, rtc_config: RtcConfig) {
// Unlock the backup domain
unsafe {
#[cfg(not(any(rtc_v3u5, rcc_wl5, rcc_wle)))]
{
crate::pac::PWR.cr1().modify(|w| w.set_dbp(true));
@ -50,10 +49,8 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
w.set_lsebyp(reg.lsebyp());
});
}
}
self.write(true, |rtc| {
unsafe {
rtc.cr().modify(|w| {
w.set_fmt(Fmt::TWENTYFOURHOUR);
w.set_osel(Osel::DISABLED);
@ -71,7 +68,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
w.set_tampalrm_type(TampalrmType::PUSHPULL);
w.set_tampalrm_pu(TampalrmPu::NOPULLUP);
});
}
});
self.rtc_config = rtc_config;
@ -99,7 +95,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
clock_drift = clock_drift / Self::RTC_CALR_RESOLUTION_PPM;
self.write(false, |rtc| {
unsafe {
rtc.calr().write(|w| {
match period {
RtcCalibrationCyclePeriod::Seconds8 => {
@ -139,7 +134,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
w.set_calm((clock_drift * -1.0) as u16);
}
});
}
})
}
@ -150,7 +144,6 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
let r = T::regs();
// Disable write protection.
// This is safe, as we're only writin the correct and expected values.
unsafe {
r.wpr().write(|w| w.set_key(Key::DEACTIVATE1));
r.wpr().write(|w| w.set_key(Key::DEACTIVATE2));
@ -160,11 +153,9 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
// ~2 RTCCLK cycles
while !r.icsr().read().initf() {}
}
}
let result = f(&r);
unsafe {
if init_mode {
r.icsr().modify(|w| w.set_init(Init::FREERUNNINGMODE)); // Exits init mode
}
@ -172,7 +163,7 @@ impl<'d, T: Instance> super::Rtc<'d, T> {
// Re-enable write protection.
// This is safe, as the field accepts the full range of 8-bit values.
r.wpr().write(|w| w.set_key(Key::ACTIVATE));
}
result
}
}
@ -192,7 +183,7 @@ impl sealed::Instance for crate::peripherals::RTC {
fn write_backup_register(_rtc: &Rtc, register: usize, _value: u32) {
if register < Self::BACKUP_REGISTER_COUNT {
// RTC3 backup registers come from the TAMP peripe=heral, not RTC. Not() even in the L412 PAC
//unsafe { self.rtc.bkpr()[register].write(|w| w.bits(value)) }
//self.rtc.bkpr()[register].write(|w| w.bits(value))
}
}
}

79
embassy-stm32/src/sdmmc/mod.rs
View File

@ -28,8 +28,6 @@ pub struct InterruptHandler<T: Instance> {
impl<T: Instance> InterruptHandler<T> {
fn data_interrupts(enable: bool) {
let regs = T::regs();
// NOTE(unsafe) Atomic write
unsafe {
regs.maskr().write(|w| {
w.set_dcrcfailie(enable);
w.set_dtimeoutie(enable);
@ -39,7 +37,6 @@ impl<T: Instance> InterruptHandler<T> {
w.set_dabortie(enable);
});
}
}
}
impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandler<T> {
@ -285,7 +282,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T>> Sdmmc<'d, T, Dma> {
) -> Self {
into_ref!(clk, cmd, d0);
critical_section::with(|_| unsafe {
critical_section::with(|_| {
clk.set_as_af_pull(clk.af_num(), AFType::OutputPushPull, Pull::None);
cmd.set_as_af_pull(cmd.af_num(), AFType::OutputPushPull, Pull::Up);
d0.set_as_af_pull(d0.af_num(), AFType::OutputPushPull, Pull::Up);
@ -322,7 +319,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T>> Sdmmc<'d, T, Dma> {
) -> Self {
into_ref!(clk, cmd, d0, d1, d2, d3);
critical_section::with(|_| unsafe {
critical_section::with(|_| {
clk.set_as_af_pull(clk.af_num(), AFType::OutputPushPull, Pull::None);
cmd.set_as_af_pull(cmd.af_num(), AFType::OutputPushPull, Pull::Up);
d0.set_as_af_pull(d0.af_num(), AFType::OutputPushPull, Pull::Up);
@ -364,7 +361,7 @@ impl<'d, T: Instance> Sdmmc<'d, T, NoDma> {
) -> Self {
into_ref!(clk, cmd, d0);
critical_section::with(|_| unsafe {
critical_section::with(|_| {
clk.set_as_af_pull(clk.af_num(), AFType::OutputPushPull, Pull::None);
cmd.set_as_af_pull(cmd.af_num(), AFType::OutputPushPull, Pull::Up);
d0.set_as_af_pull(d0.af_num(), AFType::OutputPushPull, Pull::Up);
@ -400,7 +397,7 @@ impl<'d, T: Instance> Sdmmc<'d, T, NoDma> {
) -> Self {
into_ref!(clk, cmd, d0, d1, d2, d3);
critical_section::with(|_| unsafe {
critical_section::with(|_| {
clk.set_as_af_pull(clk.af_num(), AFType::OutputPushPull, Pull::None);
cmd.set_as_af_pull(cmd.af_num(), AFType::OutputPushPull, Pull::Up);
d0.set_as_af_pull(d0.af_num(), AFType::OutputPushPull, Pull::Up);
@ -451,7 +448,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
unsafe { T::Interrupt::enable() };
let regs = T::regs();
unsafe {
regs.clkcr().write(|w| {
w.set_pwrsav(false);
w.set_negedge(false);
@ -470,7 +466,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
// Power off, writen 00: Clock to the card is stopped;
// D[7:0], CMD, and CK are driven high.
regs.power().modify(|w| w.set_pwrctrl(PowerCtrl::Off as u8));
}
Self {
_peri: sdmmc,
@ -495,30 +490,24 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
fn data_active() -> bool {
let regs = T::regs();
// NOTE(unsafe) Atomic read with no side-effects
unsafe {
let status = regs.star().read();
#[cfg(sdmmc_v1)]
return status.rxact() || status.txact();
#[cfg(sdmmc_v2)]
return status.dpsmact();
}
}
/// Coammand transfer is in progress
#[inline(always)]
fn cmd_active() -> bool {
let regs = T::regs();
// NOTE(unsafe) Atomic read with no side-effects
unsafe {
let status = regs.star().read();
#[cfg(sdmmc_v1)]
return status.cmdact();
#[cfg(sdmmc_v2)]
return status.cpsmact();
}
}
/// Wait idle on CMDACT, RXACT and TXACT (v1) or DOSNACT and CPSMACT (v2)
#[inline(always)]
@ -542,19 +531,17 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
Self::wait_idle();
Self::clear_interrupt_flags();
// NOTE(unsafe) We have exclusive access to the regisers
unsafe {
regs.dtimer()
.write(|w| w.set_datatime(self.config.data_transfer_timeout));
regs.dlenr().write(|w| w.set_datalength(length_bytes));
#[cfg(sdmmc_v1)]
let transfer = {
let transfer = unsafe {
let request = self.dma.request();
Transfer::new_read(
&mut self.dma,
request,
regs.fifor().ptr() as *mut u32,
regs.fifor().as_ptr() as *mut u32,
buffer,
DMA_TRANSFER_OPTIONS,
)
@ -580,7 +567,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
transfer
}
}
/// # Safety
///
@ -598,20 +584,18 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
Self::wait_idle();
Self::clear_interrupt_flags();
// NOTE(unsafe) We have exclusive access to the regisers
unsafe {
regs.dtimer()
.write(|w| w.set_datatime(self.config.data_transfer_timeout));
regs.dlenr().write(|w| w.set_datalength(length_bytes));
#[cfg(sdmmc_v1)]
let transfer = {
let transfer = unsafe {
let request = self.dma.request();
Transfer::new_write(
&mut self.dma,
request,
buffer,
regs.fifor().ptr() as *mut u32,
regs.fifor().as_ptr() as *mut u32,
DMA_TRANSFER_OPTIONS,
)
};
@ -636,13 +620,11 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
transfer
}
}
/// Stops the DMA datapath
fn stop_datapath() {
let regs = T::regs();
unsafe {
#[cfg(sdmmc_v1)]
regs.dctrl().modify(|w| {
w.set_dmaen(false);
@ -651,7 +633,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
#[cfg(sdmmc_v2)]
regs.idmactrlr().modify(|w| w.set_idmaen(false));
}
}
/// Sets the CLKDIV field in CLKCR. Updates clock field in self
fn clkcr_set_clkdiv(&mut self, freq: u32, width: BusWidth) -> Result<(), Error> {
@ -673,8 +654,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
assert!(ker_ck.0 > 3 * sdmmc_bus_bandwidth / 32);
self.clock = new_clock;
// NOTE(unsafe) We have exclusive access to the regblock
unsafe {
// CPSMACT and DPSMACT must be 0 to set CLKDIV
Self::wait_idle();
regs.clkcr().modify(|w| {
@ -682,7 +661,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
#[cfg(sdmmc_v1)]
w.set_bypass(_bypass);
});
}
Ok(())
}
@ -710,7 +688,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
// Arm `OnDrop` after the buffer, so it will be dropped first
let regs = T::regs();
let on_drop = OnDrop::new(|| unsafe { Self::on_drop() });
let on_drop = OnDrop::new(|| Self::on_drop());
let transfer = self.prepare_datapath_read(&mut status, 64, 6);
InterruptHandler::<T>::data_interrupts(true);
@ -718,7 +696,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
let res = poll_fn(|cx| {
T::state().register(cx.waker());
let status = unsafe { regs.star().read() };
let status = regs.star().read();
if status.dcrcfail() {
return Poll::Ready(Err(Error::Crc));
@ -769,8 +747,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
Self::cmd(Cmd::card_status(rca << 16), false)?; // CMD13
// NOTE(unsafe) Atomic read with no side-effects
let r1 = unsafe { regs.respr(0).read().cardstatus() };
let r1 = regs.respr(0).read().cardstatus();
Ok(r1.into())
}
@ -786,7 +763,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
// Arm `OnDrop` after the buffer, so it will be dropped first
let regs = T::regs();
let on_drop = OnDrop::new(|| unsafe { Self::on_drop() });
let on_drop = OnDrop::new(|| Self::on_drop());
let transfer = self.prepare_datapath_read(&mut status, 64, 6);
InterruptHandler::<T>::data_interrupts(true);
@ -794,7 +771,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
let res = poll_fn(|cx| {
T::state().register(cx.waker());
let status = unsafe { regs.star().read() };
let status = regs.star().read();
if status.dcrcfail() {
return Poll::Ready(Err(Error::Crc));
@ -840,8 +817,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
#[inline(always)]
fn clear_interrupt_flags() {
let regs = T::regs();
// NOTE(unsafe) Atomic write
unsafe {
regs.icr().write(|w| {
w.set_ccrcfailc(true);
w.set_dcrcfailc(true);
@ -869,7 +844,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
}
});
}
}
async fn get_scr(&mut self, card: &mut Card) -> Result<(), Error> {
// Read the the 64-bit SCR register
@ -880,7 +854,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
// Arm `OnDrop` after the buffer, so it will be dropped first
let regs = T::regs();
let on_drop = OnDrop::new(|| unsafe { Self::on_drop() });
let on_drop = OnDrop::new(|| Self::on_drop());
let transfer = self.prepare_datapath_read(&mut scr[..], 8, 3);
InterruptHandler::<T>::data_interrupts(true);
@ -888,7 +862,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
let res = poll_fn(|cx| {
T::state().register(cx.waker());
let status = unsafe { regs.star().read() };
let status = regs.star().read();
if status.dcrcfail() {
return Poll::Ready(Err(Error::Crc));
@ -921,8 +895,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
let regs = T::regs();
Self::clear_interrupt_flags();
// NOTE(safety) Atomic operations
unsafe {
// CP state machine must be idle
while Self::cmd_active() {}
@ -968,12 +940,8 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
}
Ok(())
}
}
/// # Safety
///
/// Ensure that `regs` has exclusive access to the regblocks
unsafe fn on_drop() {
fn on_drop() {
let regs = T::regs();
if Self::data_active() {
Self::clear_interrupt_flags();
@ -1017,8 +985,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
false => BusWidth::One,
};
// NOTE(unsafe) We have exclusive access to the peripheral
unsafe {
// While the SD/SDIO card or eMMC is in identification mode,
// the SDMMC_CK frequency must be no more than 400 kHz.
let (_bypass, clkdiv, init_clock) = unwrap!(clk_div(ker_ck, SD_INIT_FREQ.0));
@ -1151,7 +1117,6 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
}
// Read status after signalling change
self.read_sd_status().await?;
}
Ok(())
}
@ -1172,7 +1137,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
Self::cmd(Cmd::set_block_length(512), false)?; // CMD16
let regs = T::regs();
let on_drop = OnDrop::new(|| unsafe { Self::on_drop() });
let on_drop = OnDrop::new(|| Self::on_drop());
let transfer = self.prepare_datapath_read(buffer, 512, 9);
InterruptHandler::<T>::data_interrupts(true);
@ -1180,7 +1145,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
let res = poll_fn(|cx| {
T::state().register(cx.waker());
let status = unsafe { regs.star().read() };
let status = regs.star().read();
if status.dcrcfail() {
return Poll::Ready(Err(Error::Crc));
@ -1217,7 +1182,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
Self::cmd(Cmd::set_block_length(512), false)?; // CMD16
let regs = T::regs();
let on_drop = OnDrop::new(|| unsafe { Self::on_drop() });
let on_drop = OnDrop::new(|| Self::on_drop());
// sdmmc_v1 uses different cmd/dma order than v2, but only for writes
#[cfg(sdmmc_v1)]
@ -1231,7 +1196,7 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
let res = poll_fn(|cx| {
T::state().register(cx.waker());
let status = unsafe { regs.star().read() };
let status = regs.star().read();
if status.dcrcfail() {
return Poll::Ready(Err(Error::Crc));
@ -1289,9 +1254,9 @@ impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Sdmmc<'d, T, Dma> {
impl<'d, T: Instance, Dma: SdmmcDma<T> + 'd> Drop for Sdmmc<'d, T, Dma> {
fn drop(&mut self) {
T::Interrupt::disable();
unsafe { Self::on_drop() };
Self::on_drop();
critical_section::with(|_| unsafe {
critical_section::with(|_| {
self.clk.set_as_disconnected();
self.cmd.set_as_disconnected();
self.d0.set_as_disconnected();

66
embassy-stm32/src/spi/mod.rs
View File

@ -98,14 +98,12 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
Polarity::IdleHigh => Pull::Up,
};
unsafe {
sck.set_as_af_pull(sck.af_num(), AFType::OutputPushPull, sck_pull_mode);
sck.set_speed(crate::gpio::Speed::VeryHigh);
mosi.set_as_af(mosi.af_num(), AFType::OutputPushPull);
mosi.set_speed(crate::gpio::Speed::VeryHigh);
miso.set_as_af(miso.af_num(), AFType::Input);
miso.set_speed(crate::gpio::Speed::VeryHigh);
}
Self::new_inner(
peri,
@ -129,12 +127,10 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
config: Config,
) -> Self {
into_ref!(sck, miso);
unsafe {
sck.set_as_af(sck.af_num(), AFType::OutputPushPull);
sck.set_speed(crate::gpio::Speed::VeryHigh);
miso.set_as_af(miso.af_num(), AFType::Input);
miso.set_speed(crate::gpio::Speed::VeryHigh);
}
Self::new_inner(
peri,
@ -158,12 +154,10 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
config: Config,
) -> Self {
into_ref!(sck, mosi);
unsafe {
sck.set_as_af(sck.af_num(), AFType::OutputPushPull);
sck.set_speed(crate::gpio::Speed::VeryHigh);
mosi.set_as_af(mosi.af_num(), AFType::OutputPushPull);
mosi.set_speed(crate::gpio::Speed::VeryHigh);
}
Self::new_inner(
peri,
@ -186,10 +180,8 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
config: Config,
) -> Self {
into_ref!(mosi);
unsafe {
mosi.set_as_af_pull(mosi.af_num(), AFType::OutputPushPull, Pull::Down);
mosi.set_speed(crate::gpio::Speed::Medium);
}
Self::new_inner(peri, None, Some(mosi.map_into()), None, txdma, rxdma, freq, config)
}
@ -247,7 +239,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
T::reset();
#[cfg(any(spi_v1, spi_f1))]
unsafe {
{
T::REGS.cr2().modify(|w| {
w.set_ssoe(false);
});
@ -270,7 +262,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
});
}
#[cfg(spi_v2)]
unsafe {
{
T::REGS.cr2().modify(|w| {
let (ds, frxth) = <u8 as sealed::Word>::CONFIG;
w.set_frxth(frxth);
@ -292,7 +284,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
});
}
#[cfg(any(spi_v3, spi_v4, spi_v5))]
unsafe {
{
T::REGS.ifcr().write(|w| w.0 = 0xffff_ffff);
T::REGS.cfg2().modify(|w| {
//w.set_ssoe(true);
@ -343,29 +335,25 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
let lsbfirst = config.raw_byte_order();
#[cfg(any(spi_v1, spi_f1, spi_v2))]
unsafe {
T::REGS.cr1().modify(|w| {
w.set_cpha(cpha);
w.set_cpol(cpol);
w.set_lsbfirst(lsbfirst);
});
}
#[cfg(any(spi_v3, spi_v4, spi_v5))]
unsafe {
T::REGS.cfg2().modify(|w| {
w.set_cpha(cpha);
w.set_cpol(cpol);
w.set_lsbfirst(lsbfirst);
});
}
}
pub fn get_current_config(&self) -> Config {
#[cfg(any(spi_v1, spi_f1, spi_v2))]
let cfg = unsafe { T::REGS.cr1().read() };
let cfg = T::REGS.cr1().read();
#[cfg(any(spi_v3, spi_v4, spi_v5))]
let cfg = unsafe { T::REGS.cfg2().read() };
let cfg = T::REGS.cfg2().read();
let polarity = if cfg.cpol() == vals::Cpol::IDLELOW {
Polarity::IdleLow
} else {
@ -395,7 +383,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
#[cfg(any(spi_v1, spi_f1))]
unsafe {
{
T::REGS.cr1().modify(|reg| {
reg.set_spe(false);
reg.set_dff(word_size)
@ -405,7 +393,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
});
}
#[cfg(spi_v2)]
unsafe {
{
T::REGS.cr1().modify(|w| {
w.set_spe(false);
});
@ -418,7 +406,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
});
}
#[cfg(any(spi_v3, spi_v4, spi_v5))]
unsafe {
{
T::REGS.cr1().modify(|w| {
w.set_csusp(true);
});
@ -447,17 +435,14 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
self.set_word_size(W::CONFIG);
unsafe {
T::REGS.cr1().modify(|w| {
w.set_spe(false);
});
}
let tx_request = self.txdma.request();
let tx_dst = T::REGS.tx_ptr();
let tx_f = unsafe { Transfer::new_write(&mut self.txdma, tx_request, data, tx_dst, Default::default()) };
unsafe {
set_txdmaen(T::REGS, true);
T::REGS.cr1().modify(|w| {
w.set_spe(true);
@ -466,7 +451,6 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
T::REGS.cr1().modify(|w| {
w.set_cstart(true);
});
}
tx_f.await;
@ -485,11 +469,9 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
self.set_word_size(W::CONFIG);
unsafe {
T::REGS.cr1().modify(|w| {
w.set_spe(false);
});
}
// SPIv3 clears rxfifo on SPE=0
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
@ -517,7 +499,6 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
)
};
unsafe {
set_txdmaen(T::REGS, true);
T::REGS.cr1().modify(|w| {
w.set_spe(true);
@ -526,7 +507,6 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
T::REGS.cr1().modify(|w| {
w.set_cstart(true);
});
}
join(tx_f, rx_f).await;
@ -548,11 +528,9 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
self.set_word_size(W::CONFIG);
unsafe {
T::REGS.cr1().modify(|w| {
w.set_spe(false);
});
}
// SPIv3 clears rxfifo on SPE=0
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
@ -568,7 +546,6 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
let tx_dst = T::REGS.tx_ptr();
let tx_f = unsafe { Transfer::new_write_raw(&mut self.txdma, tx_request, write, tx_dst, Default::default()) };
unsafe {
set_txdmaen(T::REGS, true);
T::REGS.cr1().modify(|w| {
w.set_spe(true);
@ -577,7 +554,6 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
T::REGS.cr1().modify(|w| {
w.set_cstart(true);
});
}
join(tx_f, rx_f).await;
@ -603,7 +579,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_write<W: Word>(&mut self, words: &[W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
T::REGS.cr1().modify(|w| w.set_spe(true));
flush_rx_fifo(T::REGS);
self.set_word_size(W::CONFIG);
for word in words.iter() {
@ -613,7 +589,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_read<W: Word>(&mut self, words: &mut [W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
T::REGS.cr1().modify(|w| w.set_spe(true));
flush_rx_fifo(T::REGS);
self.set_word_size(W::CONFIG);
for word in words.iter_mut() {
@ -623,7 +599,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_transfer_in_place<W: Word>(&mut self, words: &mut [W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
T::REGS.cr1().modify(|w| w.set_spe(true));
flush_rx_fifo(T::REGS);
self.set_word_size(W::CONFIG);
for word in words.iter_mut() {
@ -633,7 +609,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_transfer<W: Word>(&mut self, read: &mut [W], write: &[W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
T::REGS.cr1().modify(|w| w.set_spe(true));
flush_rx_fifo(T::REGS);
self.set_word_size(W::CONFIG);
let len = read.len().max(write.len());
@ -650,12 +626,10 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
impl<'d, T: Instance, Tx, Rx> Drop for Spi<'d, T, Tx, Rx> {
fn drop(&mut self) {
unsafe {
self.sck.as_ref().map(|x| x.set_as_disconnected());
self.mosi.as_ref().map(|x| x.set_as_disconnected());
self.miso.as_ref().map(|x| x.set_as_disconnected());
}
}
}
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
@ -690,7 +664,7 @@ impl RegsExt for Regs {
let dr = self.dr();
#[cfg(any(spi_v3, spi_v4, spi_v5))]
let dr = self.txdr();
dr.ptr() as *mut W
dr.as_ptr() as *mut W
}
fn rx_ptr<W>(&self) -> *mut W {
@ -698,7 +672,7 @@ impl RegsExt for Regs {
let dr = self.dr();
#[cfg(any(spi_v3, spi_v4, spi_v5))]
let dr = self.rxdr();
dr.ptr() as *mut W
dr.as_ptr() as *mut W
}
}
@ -731,7 +705,7 @@ fn check_error_flags(sr: regs::Sr) -> Result<(), Error> {
fn spin_until_tx_ready(regs: Regs) -> Result<(), Error> {
loop {
let sr = unsafe { regs.sr().read() };
let sr = regs.sr().read();
check_error_flags(sr)?;
@ -748,7 +722,7 @@ fn spin_until_tx_ready(regs: Regs) -> Result<(), Error> {
fn spin_until_rx_ready(regs: Regs) -> Result<(), Error> {
loop {
let sr = unsafe { regs.sr().read() };
let sr = regs.sr().read();
check_error_flags(sr)?;
@ -764,7 +738,6 @@ fn spin_until_rx_ready(regs: Regs) -> Result<(), Error> {
}
fn flush_rx_fifo(regs: Regs) {
unsafe {
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
while regs.sr().read().rxne() {
let _ = regs.dr().read();
@ -773,11 +746,9 @@ fn flush_rx_fifo(regs: Regs) {
while regs.sr().read().rxp() {
let _ = regs.rxdr().read();
}
}
}
fn set_txdmaen(regs: Regs, val: bool) {
unsafe {
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
regs.cr2().modify(|reg| {
reg.set_txdmaen(val);
@ -786,11 +757,9 @@ fn set_txdmaen(regs: Regs, val: bool) {
regs.cfg1().modify(|reg| {
reg.set_txdmaen(val);
});
}
}
fn set_rxdmaen(regs: Regs, val: bool) {
unsafe {
#[cfg(not(any(spi_v3, spi_v4, spi_v5)))]
regs.cr2().modify(|reg| {
reg.set_rxdmaen(val);
@ -799,11 +768,9 @@ fn set_rxdmaen(regs: Regs, val: bool) {
regs.cfg1().modify(|reg| {
reg.set_rxdmaen(val);
});
}
}
fn finish_dma(regs: Regs) {
unsafe {
#[cfg(spi_v2)]
while regs.sr().read().ftlvl() > 0 {}
@ -829,7 +796,6 @@ fn finish_dma(regs: Regs) {
reg.set_txdmaen(false);
reg.set_rxdmaen(false);
});
}
}
fn transfer_word<W: Word>(regs: Regs, tx_word: W) -> Result<W, Error> {

20
embassy-stm32/src/time_driver.rs
View File

@ -155,8 +155,7 @@ impl RtcDriver {
let timer_freq = T::frequency();
// NOTE(unsafe) Critical section to use the unsafe methods
critical_section::with(|_| unsafe {
critical_section::with(|_| {
r.cr1().modify(|w| w.set_cen(false));
r.cnt().write(|w| w.set_cnt(0));
@ -184,7 +183,7 @@ impl RtcDriver {
});
<T as BasicInstance>::Interrupt::unpend();
<T as BasicInstance>::Interrupt::enable();
unsafe { <T as BasicInstance>::Interrupt::enable() };
r.cr1().modify(|w| w.set_cen(true));
})
@ -193,9 +192,8 @@ impl RtcDriver {
fn on_interrupt(&self) {
let r = T::regs_gp16();
// NOTE(unsafe) Use critical section to access the methods
// XXX: reduce the size of this critical section ?
critical_section::with(|cs| unsafe {
critical_section::with(|cs| {
let sr = r.sr().read();
let dier = r.dier().read();
@ -228,7 +226,7 @@ impl RtcDriver {
let period = self.period.fetch_add(1, Ordering::Relaxed) + 1;
let t = (period as u64) << 15;
critical_section::with(move |cs| unsafe {
critical_section::with(move |cs| {
r.dier().modify(move |w| {
for n in 0..ALARM_COUNT {
let alarm = &self.alarms.borrow(cs)[n];
@ -269,8 +267,7 @@ impl Driver for RtcDriver {
let period = self.period.load(Ordering::Relaxed);
compiler_fence(Ordering::Acquire);
// NOTE(unsafe) Atomic read with no side-effects
let counter = unsafe { r.cnt().read().cnt() };
let counter = r.cnt().read().cnt();
calc_now(period, counter)
}
@ -310,7 +307,7 @@ impl Driver for RtcDriver {
if timestamp <= t {
// If alarm timestamp has passed the alarm will not fire.
// Disarm the alarm and return `false` to indicate that.
unsafe { r.dier().modify(|w| w.set_ccie(n + 1, false)) };
r.dier().modify(|w| w.set_ccie(n + 1, false));
alarm.timestamp.set(u64::MAX);
@ -321,12 +318,11 @@ impl Driver for RtcDriver {
// Write the CCR value regardless of whether we're going to enable it now or not.
// This way, when we enable it later, the right value is already set.
unsafe { r.ccr(n + 1).write(|w| w.set_ccr(safe_timestamp as u16)) };
r.ccr(n + 1).write(|w| w.set_ccr(safe_timestamp as u16));
// Enable it if it'll happen soon. Otherwise, `next_period` will enable it.
let diff = timestamp - t;
// NOTE(unsafe) We're in a critical section
unsafe { r.dier().modify(|w| w.set_ccie(n + 1, diff < 0xc000)) };
r.dier().modify(|w| w.set_ccie(n + 1, diff < 0xc000));
true
})

20
embassy-stm32/src/timer/mod.rs
View File

@ -60,26 +60,20 @@ macro_rules! impl_basic_16bit_timer {
type Interrupt = crate::interrupt::typelevel::$irq;
fn regs() -> crate::pac::timer::TimBasic {
crate::pac::timer::TimBasic(crate::pac::$inst.0)
unsafe { crate::pac::timer::TimBasic::from_ptr(crate::pac::$inst.as_ptr()) }
}
fn start(&mut self) {
unsafe {
Self::regs().cr1().modify(|r| r.set_cen(true));
}
}
fn stop(&mut self) {
unsafe {
Self::regs().cr1().modify(|r| r.set_cen(false));
}
}
fn reset(&mut self) {
unsafe {
Self::regs().cnt().write(|r| r.set_cnt(0));
}
}
fn set_frequency(&mut self, frequency: Hertz) {
use core::convert::TryInto;
@ -90,7 +84,6 @@ macro_rules! impl_basic_16bit_timer {
let arr: u16 = unwrap!((pclk_ticks_per_timer_period / (u32::from(psc) + 1)).try_into());
let regs = Self::regs();
unsafe {
regs.psc().write(|r| r.set_psc(psc));
regs.arr().write(|r| r.set_arr(arr));
@ -98,11 +91,9 @@ macro_rules! impl_basic_16bit_timer {
regs.egr().write(|r| r.set_ug(true));
regs.cr1().modify(|r| r.set_urs(vals::Urs::ANYEVENT));
}
}
fn clear_update_interrupt(&mut self) -> bool {
let regs = Self::regs();
unsafe {
let sr = regs.sr().read();
if sr.uif() {
regs.sr().modify(|r| {
@ -113,14 +104,11 @@ macro_rules! impl_basic_16bit_timer {
false
}
}
}
fn enable_update_interrupt(&mut self, enable: bool) {
unsafe {
Self::regs().dier().write(|r| r.set_uie(enable));
}
}
}
};
}
@ -141,7 +129,6 @@ macro_rules! impl_32bit_timer {
let arr: u32 = unwrap!(((pclk_ticks_per_timer_period / (psc as u64 + 1)).try_into()));
let regs = Self::regs_gp32();
unsafe {
regs.psc().write(|r| r.set_psc(psc));
regs.arr().write(|r| r.set_arr(arr));
@ -150,7 +137,6 @@ macro_rules! impl_32bit_timer {
regs.cr1().modify(|r| r.set_urs(vals::Urs::ANYEVENT));
}
}
}
};
}
@ -185,7 +171,7 @@ foreach_interrupt! {
impl sealed::GeneralPurpose16bitInstance for crate::peripherals::$inst {
fn regs_gp16() -> crate::pac::timer::TimGp16 {
crate::pac::timer::TimGp16(crate::pac::$inst.0)
unsafe { crate::pac::timer::TimGp16::from_ptr(crate::pac::$inst.as_ptr()) }
}
}
@ -206,7 +192,7 @@ foreach_interrupt! {
impl sealed::GeneralPurpose16bitInstance for crate::peripherals::$inst {
fn regs_gp16() -> crate::pac::timer::TimGp16 {
crate::pac::timer::TimGp16(crate::pac::$inst.0)
unsafe { crate::pac::timer::TimGp16::from_ptr(crate::pac::$inst.as_ptr()) }
}
}

30
embassy-stm32/src/usart/buffered.rs
View File

@ -19,31 +19,30 @@ impl<T: BasicInstance> interrupt::typelevel::Handler<T::Interrupt> for Interrupt
let state = T::buffered_state();
// RX
unsafe {
let sr = sr(r).read();
let sr_val = sr(r).read();
// On v1 & v2, reading DR clears the rxne, error and idle interrupt
// flags. Keep this close to the SR read to reduce the chance of a
// flag being set in-between.
let dr = if sr.rxne() || cfg!(any(usart_v1, usart_v2)) && (sr.ore() || sr.idle()) {
let dr = if sr_val.rxne() || cfg!(any(usart_v1, usart_v2)) && (sr_val.ore() || sr_val.idle()) {
Some(rdr(r).read_volatile())
} else {
None
};
clear_interrupt_flags(r, sr);
clear_interrupt_flags(r, sr_val);
if sr.pe() {
if sr_val.pe() {
warn!("Parity error");
}
if sr.fe() {
if sr_val.fe() {
warn!("Framing error");
}
if sr.ne() {
if sr_val.ne() {
warn!("Noise error");
}
if sr.ore() {
if sr_val.ore() {
warn!("Overrun error");
}
if sr.rxne() {
if sr_val.rxne() {
let mut rx_writer = state.rx_buf.writer();
let buf = rx_writer.push_slice();
if !buf.is_empty() {
@ -58,13 +57,11 @@ impl<T: BasicInstance> interrupt::typelevel::Handler<T::Interrupt> for Interrupt
}
}
if sr.idle() {
if sr_val.idle() {
state.rx_waker.wake();
}
}
// TX
unsafe {
if sr(r).read().txe() {
let mut tx_reader = state.tx_buf.reader();
let buf = tx_reader.pop_slice();
@ -83,7 +80,6 @@ impl<T: BasicInstance> interrupt::typelevel::Handler<T::Interrupt> for Interrupt
}
}
}
}
}
pub struct State {
@ -150,14 +146,12 @@ impl<'d, T: BasicInstance> BufferedUart<'d, T> {
T::enable();
T::reset();
unsafe {
rts.set_as_af(rts.af_num(), AFType::OutputPushPull);
cts.set_as_af(cts.af_num(), AFType::Input);
T::regs().cr3().write(|w| {
w.set_rtse(true);
w.set_ctse(true);
});
}
Self::new_inner(peri, rx, tx, tx_buffer, rx_buffer, config)
}
@ -178,12 +172,10 @@ impl<'d, T: BasicInstance> BufferedUart<'d, T> {
T::enable();
T::reset();
unsafe {
de.set_as_af(de.af_num(), AFType::OutputPushPull);
T::regs().cr3().write(|w| {
w.set_dem(true);
});
}
Self::new_inner(peri, rx, tx, tx_buffer, rx_buffer, config)
}
@ -205,14 +197,11 @@ impl<'d, T: BasicInstance> BufferedUart<'d, T> {
unsafe { state.rx_buf.init(rx_buffer.as_mut_ptr(), len) };
let r = T::regs();
unsafe {
rx.set_as_af(rx.af_num(), AFType::Input);
tx.set_as_af(tx.af_num(), AFType::OutputPushPull);
}
configure(r, &config, T::frequency(), T::KIND, true, true);
unsafe {
r.cr1().modify(|w| {
#[cfg(lpuart_v2)]
w.set_fifoen(true);
@ -220,7 +209,6 @@ impl<'d, T: BasicInstance> BufferedUart<'d, T> {
w.set_rxneie(true);
w.set_idleie(true);
});
}
T::Interrupt::unpend();
unsafe { T::Interrupt::enable() };

81
embassy-stm32/src/usart/mod.rs
View File

@ -36,12 +36,11 @@ impl<T: BasicInstance> interrupt::typelevel::Handler<T::Interrupt> for Interrupt
let r = T::regs();
let s = T::state();
let (sr, cr1, cr3) = unsafe { (sr(r).read(), r.cr1().read(), r.cr3().read()) };
let (sr, cr1, cr3) = (sr(r).read(), r.cr1().read(), r.cr3().read());
let has_errors = (sr.pe() && cr1.peie()) || ((sr.fe() || sr.ne() || sr.ore()) && cr3.eie());
if has_errors {
// clear all interrupts and DMA Rx Request
unsafe {
r.cr1().modify(|w| {
// disable RXNE interrupt
w.set_rxneie(false);
@ -56,15 +55,12 @@ impl<T: BasicInstance> interrupt::typelevel::Handler<T::Interrupt> for Interrupt
// disable DMA Rx Request
w.set_dmar(false);
});
}
} else if cr1.idleie() && sr.idle() {
// IDLE detected: no more data will come
unsafe {
r.cr1().modify(|w| {
// disable idle line detection
w.set_idleie(false);
});
}
} else if cr1.rxneie() {
// We cannot check the RXNE flag as it is auto-cleared by the DMA controller
@ -205,12 +201,10 @@ impl<'d, T: BasicInstance, TxDma> UartTx<'d, T, TxDma> {
T::enable();
T::reset();
unsafe {
cts.set_as_af(cts.af_num(), AFType::Input);
T::regs().cr3().write(|w| {
w.set_ctse(true);
});
}
Self::new_inner(peri, tx, tx_dma, config)
}
@ -224,9 +218,7 @@ impl<'d, T: BasicInstance, TxDma> UartTx<'d, T, TxDma> {
let r = T::regs();
unsafe {
tx.set_as_af(tx.af_num(), AFType::OutputPushPull);
}
configure(r, &config, T::frequency(), T::KIND, false, true);
@ -245,11 +237,9 @@ impl<'d, T: BasicInstance, TxDma> UartTx<'d, T, TxDma> {
{
let ch = &mut self.tx_dma;
let request = ch.request();
unsafe {
T::regs().cr3().modify(|reg| {
reg.set_dmat(true);
});
}
// If we don't assign future to a variable, the data register pointer
// is held across an await and makes the future non-Send.
let transfer = unsafe { Transfer::new_write(ch, request, buffer, tdr(T::regs()), Default::default()) };
@ -258,21 +248,17 @@ impl<'d, T: BasicInstance, TxDma> UartTx<'d, T, TxDma> {
}
pub fn blocking_write(&mut self, buffer: &[u8]) -> Result<(), Error> {
unsafe {
let r = T::regs();
for &b in buffer {
while !sr(r).read().txe() {}
tdr(r).write_volatile(b);
}
unsafe { tdr(r).write_volatile(b) };
}
Ok(())
}
pub fn blocking_flush(&mut self) -> Result<(), Error> {
unsafe {
let r = T::regs();
while !sr(r).read().tc() {}
}
Ok(())
}
}
@ -305,12 +291,10 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
T::enable();
T::reset();
unsafe {
rts.set_as_af(rts.af_num(), AFType::OutputPushPull);
T::regs().cr3().write(|w| {
w.set_rtse(true);
});
}
Self::new_inner(peri, rx, rx_dma, config)
}
@ -325,9 +309,7 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
let r = T::regs();
unsafe {
rx.set_as_af(rx.af_num(), AFType::Input);
}
configure(r, &config, T::frequency(), T::KIND, true, false);
@ -347,7 +329,7 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
}
#[cfg(any(usart_v1, usart_v2))]
unsafe fn check_rx_flags(&mut self) -> Result<bool, Error> {
fn check_rx_flags(&mut self) -> Result<bool, Error> {
let r = T::regs();
loop {
// Handle all buffered error flags.
@ -380,7 +362,7 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
}
#[cfg(any(usart_v3, usart_v4))]
unsafe fn check_rx_flags(&mut self) -> Result<bool, Error> {
fn check_rx_flags(&mut self) -> Result<bool, Error> {
let r = T::regs();
let sr = r.isr().read();
if sr.pe() {
@ -410,22 +392,18 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
pub fn nb_read(&mut self) -> Result<u8, nb::Error<Error>> {
let r = T::regs();
unsafe {
if self.check_rx_flags()? {
Ok(rdr(r).read_volatile())
Ok(unsafe { rdr(r).read_volatile() })
} else {
Err(nb::Error::WouldBlock)
}
}
}
pub fn blocking_read(&mut self, buffer: &mut [u8]) -> Result<(), Error> {
unsafe {
let r = T::regs();
for b in buffer {
while !self.check_rx_flags()? {}
*b = rdr(r).read_volatile();
}
unsafe { *b = rdr(r).read_volatile() }
}
Ok(())
}
@ -451,8 +429,6 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
let on_drop = OnDrop::new(move || {
// defmt::trace!("Clear all USART interrupts and DMA Read Request");
// clear all interrupts and DMA Rx Request
// SAFETY: only clears Rx related flags
unsafe {
r.cr1().modify(|w| {
// disable RXNE interrupt
w.set_rxneie(false);
@ -467,7 +443,6 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
// disable DMA Rx Request
w.set_dmar(false);
});
}
});
let ch = &mut self.rx_dma;
@ -480,14 +455,11 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
// future which will complete when DMA Read request completes
let transfer = unsafe { Transfer::new_read(ch, request, rdr(T::regs()), buffer, Default::default()) };
// SAFETY: The only way we might have a problem is using split rx and tx
// here we only modify or read Rx related flags, interrupts and DMA channel
unsafe {
// clear ORE flag just before enabling DMA Rx Request: can be mandatory for the second transfer
if !self.detect_previous_overrun {
let sr = sr(r).read();
// This read also clears the error and idle interrupt flags on v1.
rdr(r).read_volatile();
unsafe { rdr(r).read_volatile() };
clear_interrupt_flags(r, sr);
}
@ -521,7 +493,7 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
let sr = sr(r).read();
// This read also clears the error and idle interrupt flags on v1.
rdr(r).read_volatile();
unsafe { rdr(r).read_volatile() };
clear_interrupt_flags(r, sr);
if sr.pe() {
@ -544,7 +516,7 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
// clear idle flag
let sr = sr(r).read();
// This read also clears the error and idle interrupt flags on v1.
rdr(r).read_volatile();
unsafe { rdr(r).read_volatile() };
clear_interrupt_flags(r, sr);
// enable idle interrupt
@ -552,7 +524,6 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
w.set_idleie(true);
});
}
}
compiler_fence(Ordering::SeqCst);
@ -562,15 +533,11 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
s.rx_waker.register(cx.waker());
// SAFETY: read only and we only use Rx related flags
let sr = unsafe { sr(r).read() };
let sr = sr(r).read();
// SAFETY: only clears Rx related flags
unsafe {
// This read also clears the error and idle interrupt flags on v1.
rdr(r).read_volatile();
unsafe { rdr(r).read_volatile() };
clear_interrupt_flags(r, sr);
}
compiler_fence(Ordering::SeqCst);
@ -677,14 +644,12 @@ impl<'d, T: BasicInstance, TxDma, RxDma> Uart<'d, T, TxDma, RxDma> {
T::enable();
T::reset();
unsafe {
rts.set_as_af(rts.af_num(), AFType::OutputPushPull);
cts.set_as_af(cts.af_num(), AFType::Input);
T::regs().cr3().write(|w| {
w.set_rtse(true);
w.set_ctse(true);
});
}
Self::new_inner(peri, rx, tx, tx_dma, rx_dma, config)
}
@ -704,12 +669,10 @@ impl<'d, T: BasicInstance, TxDma, RxDma> Uart<'d, T, TxDma, RxDma> {
T::enable();
T::reset();
unsafe {
de.set_as_af(de.af_num(), AFType::OutputPushPull);
T::regs().cr3().write(|w| {
w.set_dem(true);
});
}
Self::new_inner(peri, rx, tx, tx_dma, rx_dma, config)
}
@ -725,10 +688,8 @@ impl<'d, T: BasicInstance, TxDma, RxDma> Uart<'d, T, TxDma, RxDma> {
let r = T::regs();
unsafe {
rx.set_as_af(rx.af_num(), AFType::Input);
tx.set_as_af(tx.af_num(), AFType::OutputPushPull);
}
configure(r, &config, T::frequency(), T::KIND, true, true);
@ -847,11 +808,9 @@ fn configure(r: Regs, config: &Config, pclk_freq: Hertz, kind: Kind, enable_rx:
if div * 2 >= brr_min && kind == Kind::Uart && !cfg!(usart_v1) {
over8 = true;
let div = div as u32;
unsafe {
r.brr().write_value(regs::Brr(((div << 1) & !0xF) | (div & 0x07)));
#[cfg(usart_v4)]
r.presc().write(|w| w.set_prescaler(_presc_val));
}
found = Some(div);
break;
}
@ -860,11 +819,9 @@ fn configure(r: Regs, config: &Config, pclk_freq: Hertz, kind: Kind, enable_rx:
if div < brr_max {
let div = div as u32;
unsafe {
r.brr().write_value(regs::Brr(div));
#[cfg(usart_v4)]
r.presc().write(|w| w.set_prescaler(_presc_val));
}
found = Some(div);
break;
}
@ -883,7 +840,6 @@ fn configure(r: Regs, config: &Config, pclk_freq: Hertz, kind: Kind, enable_rx:
pclk_freq.0 / div
);
unsafe {
r.cr2().write(|w| {
w.set_stop(match config.stop_bits {
StopBits::STOP0P5 => vals::Stop::STOP0P5,
@ -920,7 +876,6 @@ fn configure(r: Regs, config: &Config, pclk_freq: Hertz, kind: Kind, enable_rx:
r.cr3().modify(|w| {
w.set_onebit(config.assume_noise_free);
});
}
}
mod eh02 {
@ -1111,12 +1066,12 @@ use self::sealed::Kind;
#[cfg(any(usart_v1, usart_v2))]
fn tdr(r: crate::pac::usart::Usart) -> *mut u8 {
r.dr().ptr() as _
r.dr().as_ptr() as _
}
#[cfg(any(usart_v1, usart_v2))]
fn rdr(r: crate::pac::usart::Usart) -> *mut u8 {
r.dr().ptr() as _
r.dr().as_ptr() as _
}
#[cfg(any(usart_v1, usart_v2))]
@ -1126,18 +1081,18 @@ fn sr(r: crate::pac::usart::Usart) -> crate::pac::common::Reg<regs::Sr, crate::p
#[cfg(any(usart_v1, usart_v2))]
#[allow(unused)]
unsafe fn clear_interrupt_flags(_r: Regs, _sr: regs::Sr) {
fn clear_interrupt_flags(_r: Regs, _sr: regs::Sr) {
// On v1 the flags are cleared implicitly by reads and writes to DR.
}
#[cfg(any(usart_v3, usart_v4))]
fn tdr(r: Regs) -> *mut u8 {
r.tdr().ptr() as _
r.tdr().as_ptr() as _
}
#[cfg(any(usart_v3, usart_v4))]
fn rdr(r: Regs) -> *mut u8 {
r.rdr().ptr() as _
r.rdr().as_ptr() as _
}
#[cfg(any(usart_v3, usart_v4))]
@ -1147,7 +1102,7 @@ fn sr(r: Regs) -> crate::pac::common::Reg<regs::Isr, crate::pac::common::R> {
#[cfg(any(usart_v3, usart_v4))]
#[allow(unused)]
unsafe fn clear_interrupt_flags(r: Regs, sr: regs::Isr) {
fn clear_interrupt_flags(r: Regs, sr: regs::Isr) {
r.icr().write(|w| *w = regs::Icr(sr.0));
}
@ -1214,7 +1169,7 @@ macro_rules! impl_usart {
type Interrupt = crate::interrupt::typelevel::$irq;
fn regs() -> Regs {
Regs(crate::pac::$inst.0)
unsafe { Regs::from_ptr(crate::pac::$inst.as_ptr()) }
}
fn state() -> &'static crate::usart::sealed::State {

13
embassy-stm32/src/usart/ringbuffered.rs
View File

@ -59,8 +59,6 @@ impl<'d, T: BasicInstance, RxDma: super::RxDma<T>> RingBufferedUartRx<'d, T, RxD
let r = T::regs();
// clear all interrupts and DMA Rx Request
// SAFETY: only clears Rx related flags
unsafe {
r.cr1().modify(|w| {
// disable RXNE interrupt
w.set_rxneie(false);
@ -76,7 +74,6 @@ impl<'d, T: BasicInstance, RxDma: super::RxDma<T>> RingBufferedUartRx<'d, T, RxD
w.set_dmar(true);
});
}
}
/// Stop uart background receive
fn teardown_uart(&mut self) {
@ -84,8 +81,6 @@ impl<'d, T: BasicInstance, RxDma: super::RxDma<T>> RingBufferedUartRx<'d, T, RxD
let r = T::regs();
// clear all interrupts and DMA Rx Request
// SAFETY: only clears Rx related flags
unsafe {
r.cr1().modify(|w| {
// disable RXNE interrupt
w.set_rxneie(false);
@ -100,7 +95,6 @@ impl<'d, T: BasicInstance, RxDma: super::RxDma<T>> RingBufferedUartRx<'d, T, RxD
// disable DMA Rx Request
w.set_dmar(false);
});
}
compiler_fence(Ordering::SeqCst);
}
@ -117,8 +111,7 @@ impl<'d, T: BasicInstance, RxDma: super::RxDma<T>> RingBufferedUartRx<'d, T, RxD
let r = T::regs();
// Start background receive if it was not already started
// SAFETY: read only
match unsafe { r.cr3().read().dmar() } {
match r.cr3().read().dmar() {
false => self.start()?,
_ => {}
};
@ -213,19 +206,17 @@ fn check_for_errors(s: Sr) -> Result<(), Error> {
/// Clear IDLE and return the Sr register
fn clear_idle_flag(r: Regs) -> Sr {
unsafe {
// SAFETY: read only and we only use Rx related flags
let sr = sr(r).read();
// This read also clears the error and idle interrupt flags on v1.
rdr(r).read_volatile();
unsafe { rdr(r).read_volatile() };
clear_interrupt_flags(r, sr);
r.cr1().modify(|w| w.set_idleie(true));
sr
}
}
#[cfg(all(feature = "unstable-traits", feature = "nightly"))]

114
embassy-stm32/src/usb/usb.rs
View File

@ -28,7 +28,6 @@ pub struct InterruptHandler<T: Instance> {
impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandler<T> {
unsafe fn on_interrupt() {
unsafe {
let regs = T::regs();
//let x = regs.istr().read().0;
//trace!("USB IRQ: {:08x}", x);
@ -105,7 +104,6 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
regs.epr(index).write_value(epr);
}
}
}
}
const EP_COUNT: usize = 8;
@ -168,20 +166,20 @@ fn calc_out_len(len: u16) -> (u16, u16) {
mod btable {
use super::*;
pub(super) unsafe fn write_in<T: Instance>(index: usize, addr: u16) {
pub(super) fn write_in<T: Instance>(index: usize, addr: u16) {
USBRAM.mem(index * 4 + 0).write_value(addr);
}
pub(super) unsafe fn write_in_len<T: Instance>(index: usize, _addr: u16, len: u16) {
pub(super) fn write_in_len<T: Instance>(index: usize, _addr: u16, len: u16) {
USBRAM.mem(index * 4 + 1).write_value(len);
}
pub(super) unsafe fn write_out<T: Instance>(index: usize, addr: u16, max_len_bits: u16) {
pub(super) fn write_out<T: Instance>(index: usize, addr: u16, max_len_bits: u16) {
USBRAM.mem(index * 4 + 2).write_value(addr);
USBRAM.mem(index * 4 + 3).write_value(max_len_bits);
}
pub(super) unsafe fn read_out_len<T: Instance>(index: usize) -> u16 {
pub(super) fn read_out_len<T: Instance>(index: usize) -> u16 {
USBRAM.mem(index * 4 + 3).read()
}
}
@ -189,19 +187,19 @@ mod btable {
mod btable {
use super::*;
pub(super) unsafe fn write_in<T: Instance>(_index: usize, _addr: u16) {}
pub(super) fn write_in<T: Instance>(_index: usize, _addr: u16) {}
pub(super) unsafe fn write_in_len<T: Instance>(index: usize, addr: u16, len: u16) {
pub(super) fn write_in_len<T: Instance>(index: usize, addr: u16, len: u16) {
USBRAM.mem(index * 2).write_value((addr as u32) | ((len as u32) << 16));
}
pub(super) unsafe fn write_out<T: Instance>(index: usize, addr: u16, max_len_bits: u16) {
pub(super) fn write_out<T: Instance>(index: usize, addr: u16, max_len_bits: u16) {
USBRAM
.mem(index * 2 + 1)
.write_value((addr as u32) | ((max_len_bits as u32) << 16));
}
pub(super) unsafe fn read_out_len<T: Instance>(index: usize) -> u16 {
pub(super) fn read_out_len<T: Instance>(index: usize) -> u16 {
(USBRAM.mem(index * 2 + 1).read() >> 16) as u16
}
}
@ -216,7 +214,7 @@ impl<T: Instance> EndpointBuffer<T> {
fn read(&mut self, buf: &mut [u8]) {
assert!(buf.len() <= self.len as usize);
for i in 0..(buf.len() + USBRAM_ALIGN - 1) / USBRAM_ALIGN {
let val = unsafe { USBRAM.mem(self.addr as usize / USBRAM_ALIGN + i).read() };
let val = USBRAM.mem(self.addr as usize / USBRAM_ALIGN + i).read();
let n = USBRAM_ALIGN.min(buf.len() - i * USBRAM_ALIGN);
buf[i * USBRAM_ALIGN..][..n].copy_from_slice(&val.to_le_bytes()[..n]);
}
@ -233,7 +231,7 @@ impl<T: Instance> EndpointBuffer<T> {
let val = u16::from_le_bytes(val);
#[cfg(usbram_32_2048)]
let val = u32::from_le_bytes(val);
unsafe { USBRAM.mem(self.addr as usize / USBRAM_ALIGN + i).write_value(val) };
USBRAM.mem(self.addr as usize / USBRAM_ALIGN + i).write_value(val);
}
}
}
@ -266,17 +264,14 @@ impl<'d, T: Instance> Driver<'d, T> {
let regs = T::regs();
#[cfg(stm32l5)]
unsafe {
{
crate::peripherals::PWR::enable();
crate::pac::PWR.cr2().modify(|w| w.set_usv(true));
}
#[cfg(pwr_h5)]
unsafe {
crate::pac::PWR.usbscr().modify(|w| w.set_usb33sv(true))
}
crate::pac::PWR.usbscr().modify(|w| w.set_usb33sv(true));
unsafe {
<T as RccPeripheral>::enable();
<T as RccPeripheral>::reset();
@ -288,14 +283,13 @@ impl<'d, T: Instance> Driver<'d, T> {
#[cfg(time)]
embassy_time::block_for(embassy_time::Duration::from_millis(100));
#[cfg(not(time))]
cortex_m::asm::delay(crate::rcc::get_freqs().sys.0 / 10);
cortex_m::asm::delay(unsafe { crate::rcc::get_freqs() }.sys.0 / 10);
#[cfg(not(usb_v4))]
regs.btable().write(|w| w.set_btable(0));
dp.set_as_af(dp.af_num(), AFType::OutputPushPull);
dm.set_as_af(dm.af_num(), AFType::OutputPushPull);
}
// Initialize the bus so that it signals that power is available
BUS_WAKER.wake();
@ -363,7 +357,7 @@ impl<'d, T: Instance> Driver<'d, T> {
let addr = self.alloc_ep_mem(len);
trace!(" len_bits = {:04x}", len_bits);
unsafe { btable::write_out::<T>(index, addr, len_bits) }
btable::write_out::<T>(index, addr, len_bits);
EndpointBuffer {
addr,
@ -379,7 +373,7 @@ impl<'d, T: Instance> Driver<'d, T> {
let addr = self.alloc_ep_mem(len);
// ep_in_len is written when actually TXing packets.
unsafe { btable::write_in::<T>(index, addr) }
btable::write_in::<T>(index, addr);
EndpointBuffer {
addr,
@ -440,7 +434,6 @@ impl<'d, T: Instance> driver::Driver<'d> for Driver<'d, T> {
let regs = T::regs();
unsafe {
regs.cntr().write(|w| {
w.set_pdwn(false);
w.set_fres(false);
@ -451,8 +444,7 @@ impl<'d, T: Instance> driver::Driver<'d> for Driver<'d, T> {
});
#[cfg(any(usb_v3, usb_v4))]
regs.bcdr().write(|w| w.set_dppu(true))
}
regs.bcdr().write(|w| w.set_dppu(true));
trace!("enabled");
@ -485,7 +477,7 @@ pub struct Bus<'d, T: Instance> {
impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
async fn poll(&mut self) -> Event {
poll_fn(move |cx| unsafe {
poll_fn(move |cx| {
BUS_WAKER.register(cx.waker());
if self.inited {
@ -548,7 +540,7 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
match ep_addr.direction() {
Direction::In => {
loop {
let r = unsafe { reg.read() };
let r = reg.read();
match r.stat_tx() {
Stat::DISABLED => break, // if disabled, stall does nothing.
Stat::STALL => break, // done!
@ -559,7 +551,7 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
};
let mut w = invariant(r);
w.set_stat_tx(Stat(r.stat_tx().0 ^ want_stat.0));
unsafe { reg.write_value(w) };
reg.write_value(w);
}
}
}
@ -567,7 +559,7 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
}
Direction::Out => {
loop {
let r = unsafe { reg.read() };
let r = reg.read();
match r.stat_rx() {
Stat::DISABLED => break, // if disabled, stall does nothing.
Stat::STALL => break, // done!
@ -578,7 +570,7 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
};
let mut w = invariant(r);
w.set_stat_rx(Stat(r.stat_rx().0 ^ want_stat.0));
unsafe { reg.write_value(w) };
reg.write_value(w);
}
}
}
@ -589,7 +581,7 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
fn endpoint_is_stalled(&mut self, ep_addr: EndpointAddress) -> bool {
let regs = T::regs();
let epr = unsafe { regs.epr(ep_addr.index() as _).read() };
let epr = regs.epr(ep_addr.index() as _).read();
match ep_addr.direction() {
Direction::In => epr.stat_tx() == Stat::STALL,
Direction::Out => epr.stat_rx() == Stat::STALL,
@ -600,7 +592,7 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
trace!("set_enabled {:x} {}", ep_addr, enabled);
// This can race, so do a retry loop.
let reg = T::regs().epr(ep_addr.index() as _);
trace!("EPR before: {:04x}", unsafe { reg.read() }.0);
trace!("EPR before: {:04x}", reg.read().0);
match ep_addr.direction() {
Direction::In => {
loop {
@ -608,13 +600,13 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
false => Stat::DISABLED,
true => Stat::NAK,
};
let r = unsafe { reg.read() };
let r = reg.read();
if r.stat_tx() == want_stat {
break;
}
let mut w = invariant(r);
w.set_stat_tx(Stat(r.stat_tx().0 ^ want_stat.0));
unsafe { reg.write_value(w) };
reg.write_value(w);
}
EP_IN_WAKERS[ep_addr.index()].wake();
}
@ -624,18 +616,18 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
false => Stat::DISABLED,
true => Stat::VALID,
};
let r = unsafe { reg.read() };
let r = reg.read();
if r.stat_rx() == want_stat {
break;
}
let mut w = invariant(r);
w.set_stat_rx(Stat(r.stat_rx().0 ^ want_stat.0));
unsafe { reg.write_value(w) };
reg.write_value(w);
}
EP_OUT_WAKERS[ep_addr.index()].wake();
}
}
trace!("EPR after: {:04x}", unsafe { reg.read() }.0);
trace!("EPR after: {:04x}", reg.read().0);
}
async fn enable(&mut self) {}
@ -685,12 +677,12 @@ impl<'d, T: Instance, D> Endpoint<'d, T, D> {
fn write_data(&mut self, buf: &[u8]) {
let index = self.info.addr.index();
self.buf.write(buf);
unsafe { btable::write_in_len::<T>(index, self.buf.addr, buf.len() as _) }
btable::write_in_len::<T>(index, self.buf.addr, buf.len() as _);
}
fn read_data(&mut self, buf: &mut [u8]) -> Result<usize, EndpointError> {
let index = self.info.addr.index();
let rx_len = unsafe { btable::read_out_len::<T>(index) as usize } & 0x3FF;
let rx_len = btable::read_out_len::<T>(index) as usize & 0x3FF;
trace!("READ DONE, rx_len = {}", rx_len);
if rx_len > buf.len() {
return Err(EndpointError::BufferOverflow);
@ -711,7 +703,7 @@ impl<'d, T: Instance> driver::Endpoint for Endpoint<'d, T, In> {
poll_fn(|cx| {
EP_OUT_WAKERS[index].register(cx.waker());
let regs = T::regs();
if unsafe { regs.epr(index).read() }.stat_tx() == Stat::DISABLED {
if regs.epr(index).read().stat_tx() == Stat::DISABLED {
Poll::Pending
} else {
Poll::Ready(())
@ -733,7 +725,7 @@ impl<'d, T: Instance> driver::Endpoint for Endpoint<'d, T, Out> {
poll_fn(|cx| {
EP_OUT_WAKERS[index].register(cx.waker());
let regs = T::regs();
if unsafe { regs.epr(index).read() }.stat_rx() == Stat::DISABLED {
if regs.epr(index).read().stat_rx() == Stat::DISABLED {
Poll::Pending
} else {
Poll::Ready(())
@ -751,7 +743,7 @@ impl<'d, T: Instance> driver::EndpointOut for Endpoint<'d, T, Out> {
let stat = poll_fn(|cx| {
EP_OUT_WAKERS[index].register(cx.waker());
let regs = T::regs();
let stat = unsafe { regs.epr(index).read() }.stat_rx();
let stat = regs.epr(index).read().stat_rx();
if matches!(stat, Stat::NAK | Stat::DISABLED) {
Poll::Ready(stat)
} else {
@ -767,7 +759,6 @@ impl<'d, T: Instance> driver::EndpointOut for Endpoint<'d, T, Out> {
let rx_len = self.read_data(buf)?;
let regs = T::regs();
unsafe {
regs.epr(index).write(|w| {
w.set_ep_type(convert_type(self.info.ep_type));
w.set_ea(self.info.addr.index() as _);
@ -775,8 +766,7 @@ impl<'d, T: Instance> driver::EndpointOut for Endpoint<'d, T, Out> {
w.set_stat_tx(Stat(0));
w.set_ctr_rx(true); // don't clear
w.set_ctr_tx(true); // don't clear
})
};
});
trace!("READ OK, rx_len = {}", rx_len);
Ok(rx_len)
@ -795,7 +785,7 @@ impl<'d, T: Instance> driver::EndpointIn for Endpoint<'d, T, In> {
let stat = poll_fn(|cx| {
EP_IN_WAKERS[index].register(cx.waker());
let regs = T::regs();
let stat = unsafe { regs.epr(index).read() }.stat_tx();
let stat = regs.epr(index).read().stat_tx();
if matches!(stat, Stat::NAK | Stat::DISABLED) {
Poll::Ready(stat)
} else {
@ -811,7 +801,6 @@ impl<'d, T: Instance> driver::EndpointIn for Endpoint<'d, T, In> {
self.write_data(buf);
let regs = T::regs();
unsafe {
regs.epr(index).write(|w| {
w.set_ep_type(convert_type(self.info.ep_type));
w.set_ea(self.info.addr.index() as _);
@ -819,8 +808,7 @@ impl<'d, T: Instance> driver::EndpointIn for Endpoint<'d, T, In> {
w.set_stat_rx(Stat(0));
w.set_ctr_rx(true); // don't clear
w.set_ctr_tx(true); // don't clear
})
};
});
trace!("WRITE OK");
@ -889,22 +877,20 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
}
// Note: if this is the first AND last transfer, the above effectively
// changes stat_tx like NAK -> NAK, so noop.
unsafe {
regs.epr(0).write(|w| {
w.set_ep_type(EpType::CONTROL);
w.set_stat_rx(Stat(stat_rx));
w.set_stat_tx(Stat(stat_tx));
w.set_ctr_rx(true); // don't clear
w.set_ctr_tx(true); // don't clear
})
}
});
}
trace!("data_out WAITING, buf.len() = {}", buf.len());
poll_fn(|cx| {
EP_OUT_WAKERS[0].register(cx.waker());
let regs = T::regs();
if unsafe { regs.epr(0).read() }.stat_rx() == Stat::NAK {
if regs.epr(0).read().stat_rx() == Stat::NAK {
Poll::Ready(())
} else {
Poll::Pending
@ -919,7 +905,6 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
let rx_len = self.ep_out.read_data(buf)?;
unsafe {
regs.epr(0).write(|w| {
w.set_ep_type(EpType::CONTROL);
w.set_stat_rx(Stat(match last {
@ -930,8 +915,7 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
}));
w.set_ctr_rx(true); // don't clear
w.set_ctr_tx(true); // don't clear
})
};
});
Ok(rx_len)
}
@ -960,15 +944,13 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
}
// Note: if this is the first AND last transfer, the above effectively
// does a change of NAK -> VALID.
unsafe {
regs.epr(0).write(|w| {
w.set_ep_type(EpType::CONTROL);
w.set_stat_rx(Stat(stat_rx));
w.set_ep_kind(last); // set OUT_STATUS if last.
w.set_ctr_rx(true); // don't clear
w.set_ctr_tx(true); // don't clear
})
}
});
}
trace!("WRITE WAITING");
@ -976,7 +958,7 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
EP_IN_WAKERS[0].register(cx.waker());
EP_OUT_WAKERS[0].register(cx.waker());
let regs = T::regs();
if unsafe { regs.epr(0).read() }.stat_tx() == Stat::NAK {
if regs.epr(0).read().stat_tx() == Stat::NAK {
Poll::Ready(())
} else {
Poll::Pending
@ -992,15 +974,13 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
self.ep_in.write_data(data);
let regs = T::regs();
unsafe {
regs.epr(0).write(|w| {
w.set_ep_type(EpType::CONTROL);
w.set_stat_tx(Stat(Stat::NAK.0 ^ Stat::VALID.0));
w.set_ep_kind(last); // set OUT_STATUS if last.
w.set_ctr_rx(true); // don't clear
w.set_ctr_tx(true); // don't clear
})
};
});
trace!("WRITE OK");
@ -1014,7 +994,6 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
self.ep_in.write_data(&[]);
// Set OUT=stall, IN=accept
unsafe {
let epr = regs.epr(0).read();
regs.epr(0).write(|w| {
w.set_ep_type(EpType::CONTROL);
@ -1023,7 +1002,6 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
w.set_ctr_rx(true); // don't clear
w.set_ctr_tx(true); // don't clear
});
}
trace!("control: accept WAITING");
// Wait is needed, so that we don't set the address too soon, breaking the status stage.
@ -1031,7 +1009,7 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
poll_fn(|cx| {
EP_IN_WAKERS[0].register(cx.waker());
let regs = T::regs();
if unsafe { regs.epr(0).read() }.stat_tx() == Stat::NAK {
if regs.epr(0).read().stat_tx() == Stat::NAK {
Poll::Ready(())
} else {
Poll::Pending
@ -1047,7 +1025,6 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
trace!("control: reject");
// Set IN+OUT to stall
unsafe {
let epr = regs.epr(0).read();
regs.epr(0).write(|w| {
w.set_ep_type(EpType::CONTROL);
@ -1057,18 +1034,15 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> {
w.set_ctr_tx(true); // don't clear
});
}
}
async fn accept_set_address(&mut self, addr: u8) {
self.accept().await;
let regs = T::regs();
trace!("setting addr: {}", addr);
unsafe {
regs.daddr().write(|w| {
w.set_ef(true);
w.set_add(addr);
})
}
});
}
}

2
embassy-stm32/src/usb_otg/mod.rs
View File

@ -148,7 +148,7 @@ foreach_interrupt!(
fn regs() -> crate::pac::otg::Otg {
// OTG HS registers are a superset of FS registers
crate::pac::otg::Otg(crate::pac::USB_OTG_HS.0)
unsafe { crate::pac::otg::Otg::from_ptr(crate::pac::USB_OTG_HS.as_ptr()) }
}
#[cfg(feature = "nightly")]

140
embassy-stm32/src/usb_otg/usb.rs
View File

@ -30,19 +30,16 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
let r = T::regs();
let state = T::state();
// SAFETY: atomic read/write
let ints = unsafe { r.gintsts().read() };
let ints = r.gintsts().read();
if ints.wkupint() || ints.usbsusp() || ints.usbrst() || ints.enumdne() {
// Mask interrupts and notify `Bus` to process them
unsafe { r.gintmsk().write(|_| {}) };
r.gintmsk().write(|_| {});
T::state().bus_waker.wake();
}
// Handle RX
// SAFETY: atomic read with no side effects
while unsafe { r.gintsts().read().rxflvl() } {
// SAFETY: atomic "pop" register
let status = unsafe { r.grxstsp().read() };
while r.gintsts().read().rxflvl() {
let status = r.grxstsp().read();
let ep_num = status.epnum() as usize;
let len = status.bcnt() as usize;
@ -57,23 +54,17 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
if state.ep0_setup_ready.load(Ordering::Relaxed) == false {
// SAFETY: exclusive access ensured by atomic bool
let data = unsafe { &mut *state.ep0_setup_data.get() };
// SAFETY: FIFO reads are exclusive to this IRQ
unsafe {
data[0..4].copy_from_slice(&r.fifo(0).read().0.to_ne_bytes());
data[4..8].copy_from_slice(&r.fifo(0).read().0.to_ne_bytes());
}
state.ep0_setup_ready.store(true, Ordering::Release);
state.ep_out_wakers[0].wake();
} else {
error!("received SETUP before previous finished processing");
// discard FIFO
// SAFETY: FIFO reads are exclusive to IRQ
unsafe {
r.fifo(0).read();
r.fifo(0).read();
}
}
}
vals::Pktstsd::OUT_DATA_RX => {
trace!("OUT_DATA_RX ep={} len={}", ep_num, len);
@ -84,8 +75,7 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
for chunk in buf.chunks_mut(4) {
// RX FIFO is shared so always read from fifo(0)
// SAFETY: FIFO reads are exclusive to IRQ
let data = unsafe { r.fifo(0).read().0 };
let data = r.fifo(0).read().0;
chunk.copy_from_slice(&data.to_ne_bytes()[0..chunk.len()]);
}
@ -97,8 +87,7 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
// discard FIFO data
let len_words = (len + 3) / 4;
for _ in 0..len_words {
// SAFETY: FIFO reads are exclusive to IRQ
unsafe { r.fifo(0).read().data() };
r.fifo(0).read().data();
}
}
}
@ -114,24 +103,20 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
// IN endpoint interrupt
if ints.iepint() {
// SAFETY: atomic read with no side effects
let mut ep_mask = unsafe { r.daint().read().iepint() };
let mut ep_mask = r.daint().read().iepint();
let mut ep_num = 0;
// Iterate over endpoints while there are non-zero bits in the mask
while ep_mask != 0 {
if ep_mask & 1 != 0 {
// SAFETY: atomic read with no side effects
let ep_ints = unsafe { r.diepint(ep_num).read() };
let ep_ints = r.diepint(ep_num).read();
// clear all
// SAFETY: DIEPINT is exclusive to IRQ
unsafe { r.diepint(ep_num).write_value(ep_ints) };
r.diepint(ep_num).write_value(ep_ints);
// TXFE is cleared in DIEPEMPMSK
if ep_ints.txfe() {
// SAFETY: DIEPEMPMSK is shared with `Endpoint` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
r.diepempmsk().modify(|w| {
w.set_ineptxfem(w.ineptxfem() & !(1 << ep_num));
});
@ -172,8 +157,7 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
macro_rules! config_ulpi_pins {
($($pin:ident),*) => {
into_ref!($($pin),*);
// NOTE(unsafe) Exclusive access to the registers
critical_section::with(|_| unsafe {
critical_section::with(|_| {
$(
$pin.set_as_af($pin.af_num(), AFType::OutputPushPull);
#[cfg(gpio_v2)]
@ -298,10 +282,8 @@ impl<'d, T: Instance> Driver<'d, T> {
) -> Self {
into_ref!(dp, dm);
unsafe {
dp.set_as_af(dp.af_num(), AFType::OutputPushPull);
dm.set_as_af(dm.af_num(), AFType::OutputPushPull);
}
Self {
phantom: PhantomData,
@ -508,8 +490,6 @@ pub struct Bus<'d, T: Instance> {
impl<'d, T: Instance> Bus<'d, T> {
fn restore_irqs() {
// SAFETY: atomic write
unsafe {
T::regs().gintmsk().write(|w| {
w.set_usbrst(true);
w.set_enumdnem(true);
@ -520,7 +500,6 @@ impl<'d, T: Instance> Bus<'d, T> {
w.set_rxflvlm(true);
});
}
}
}
impl<'d, T: Instance> Bus<'d, T> {
@ -533,8 +512,7 @@ impl<'d, T: Instance> Bus<'d, T> {
let rx_fifo_size_words = RX_FIFO_EXTRA_SIZE_WORDS + ep_fifo_size(&self.ep_out);
trace!("configuring rx fifo size={}", rx_fifo_size_words);
// SAFETY: register is exclusive to `Bus` with `&mut self`
unsafe { r.grxfsiz().modify(|w| w.set_rxfd(rx_fifo_size_words)) };
r.grxfsiz().modify(|w| w.set_rxfd(rx_fifo_size_words));
// Configure TX (USB in direction) fifo size for each endpoint
let mut fifo_top = rx_fifo_size_words;
@ -549,13 +527,10 @@ impl<'d, T: Instance> Bus<'d, T> {
let dieptxf = if i == 0 { r.dieptxf0() } else { r.dieptxf(i - 1) };
// SAFETY: register is exclusive to `Bus` with `&mut self`
unsafe {
dieptxf.write(|w| {
w.set_fd(ep.fifo_size_words);
w.set_sa(fifo_top);
});
}
fifo_top += ep.fifo_size_words;
}
@ -575,8 +550,7 @@ impl<'d, T: Instance> Bus<'d, T> {
// Configure IN endpoints
for (index, ep) in self.ep_in.iter().enumerate() {
if let Some(ep) = ep {
// SAFETY: DIEPCTL is shared with `Endpoint` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
r.diepctl(index).write(|w| {
if index == 0 {
w.set_mpsiz(ep0_mpsiz(ep.max_packet_size));
@ -593,8 +567,7 @@ impl<'d, T: Instance> Bus<'d, T> {
// Configure OUT endpoints
for (index, ep) in self.ep_out.iter().enumerate() {
if let Some(ep) = ep {
// SAFETY: DOEPCTL/DOEPTSIZ is shared with `Endpoint` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
r.doepctl(index).write(|w| {
if index == 0 {
w.set_mpsiz(ep0_mpsiz(ep.max_packet_size));
@ -618,15 +591,12 @@ impl<'d, T: Instance> Bus<'d, T> {
}
// Enable IRQs for allocated endpoints
// SAFETY: register is exclusive to `Bus` with `&mut self`
unsafe {
r.daintmsk().modify(|w| {
w.set_iepm(ep_irq_mask(&self.ep_in));
// OUT interrupts not used, handled in RXFLVL
// w.set_oepm(ep_irq_mask(&self.ep_out));
});
}
}
fn disable(&mut self) {
T::Interrupt::disable();
@ -634,11 +604,9 @@ impl<'d, T: Instance> Bus<'d, T> {
<T as RccPeripheral>::disable();
#[cfg(stm32l4)]
unsafe {
crate::pac::PWR.cr2().modify(|w| w.set_usv(false));
// Cannot disable PWR, because other peripherals might be using it
}
}
}
impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
@ -653,7 +621,7 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
T::state().bus_waker.register(cx.waker());
let ints = unsafe { r.gintsts().read() };
let ints = r.gintsts().read();
if ints.usbrst() {
trace!("reset");
@ -661,34 +629,27 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
self.configure_endpoints();
// Reset address
// SAFETY: DCFG is shared with `ControlPipe` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
r.dcfg().modify(|w| {
w.set_dad(0);
});
});
// SAFETY: atomic clear on rc_w1 register
unsafe { r.gintsts().write(|w| w.set_usbrst(true)) }; // clear
r.gintsts().write(|w| w.set_usbrst(true)); // clear
Self::restore_irqs();
}
if ints.enumdne() {
trace!("enumdne");
// SAFETY: atomic read with no side effects
let speed = unsafe { r.dsts().read().enumspd() };
let speed = r.dsts().read().enumspd();
trace!(" speed={}", speed.0);
// SAFETY: register is only accessed by `Bus` under `&mut self`
unsafe {
r.gusbcfg().modify(|w| {
w.set_trdt(calculate_trdt(speed, T::frequency()));
})
};
});
// SAFETY: atomic clear on rc_w1 register
unsafe { r.gintsts().write(|w| w.set_enumdne(true)) }; // clear
r.gintsts().write(|w| w.set_enumdne(true)); // clear
Self::restore_irqs();
return Poll::Ready(Event::Reset);
@ -696,16 +657,14 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
if ints.usbsusp() {
trace!("suspend");
// SAFETY: atomic clear on rc_w1 register
unsafe { r.gintsts().write(|w| w.set_usbsusp(true)) }; // clear
r.gintsts().write(|w| w.set_usbsusp(true)); // clear
Self::restore_irqs();
return Poll::Ready(Event::Suspend);
}
if ints.wkupint() {
trace!("resume");
// SAFETY: atomic clear on rc_w1 register
unsafe { r.gintsts().write(|w| w.set_wkupint(true)) }; // clear
r.gintsts().write(|w| w.set_wkupint(true)); // clear
Self::restore_irqs();
return Poll::Ready(Event::Resume);
}
@ -727,8 +686,7 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
let regs = T::regs();
match ep_addr.direction() {
Direction::Out => {
// SAFETY: DOEPCTL is shared with `Endpoint` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
regs.doepctl(ep_addr.index()).modify(|w| {
w.set_stall(stalled);
});
@ -737,8 +695,7 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
T::state().ep_out_wakers[ep_addr.index()].wake();
}
Direction::In => {
// SAFETY: DIEPCTL is shared with `Endpoint` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
regs.diepctl(ep_addr.index()).modify(|w| {
w.set_stall(stalled);
});
@ -758,10 +715,9 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
let regs = T::regs();
// SAFETY: atomic read with no side effects
match ep_addr.direction() {
Direction::Out => unsafe { regs.doepctl(ep_addr.index()).read().stall() },
Direction::In => unsafe { regs.diepctl(ep_addr.index()).read().stall() },
Direction::Out => regs.doepctl(ep_addr.index()).read().stall(),
Direction::In => regs.diepctl(ep_addr.index()).read().stall(),
}
}
@ -777,8 +733,7 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
let r = T::regs();
match ep_addr.direction() {
Direction::Out => {
// SAFETY: DOEPCTL is shared with `Endpoint` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
// cancel transfer if active
if !enabled && r.doepctl(ep_addr.index()).read().epena() {
r.doepctl(ep_addr.index()).modify(|w| {
@ -796,8 +751,7 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
T::state().ep_out_wakers[ep_addr.index()].wake();
}
Direction::In => {
// SAFETY: DIEPCTL is shared with `Endpoint` so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
// cancel transfer if active
if !enabled && r.diepctl(ep_addr.index()).read().epena() {
r.diepctl(ep_addr.index()).modify(|w| {
@ -820,8 +774,6 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
async fn enable(&mut self) {
trace!("enable");
// SAFETY: registers are only accessed by `Bus` under `&mut self`
unsafe {
#[cfg(stm32l4)]
{
crate::peripherals::PWR::enable();
@ -927,7 +879,7 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
<T as RccPeripheral>::reset();
T::Interrupt::unpend();
T::Interrupt::enable();
unsafe { T::Interrupt::enable() };
let r = T::regs();
let core_id = r.cid().read().0;
@ -1008,7 +960,6 @@ impl<'d, T: Instance> embassy_usb_driver::Bus for Bus<'d, T> {
// Connect
r.dctl().write(|w| w.set_sdis(false));
}
self.enabled = true;
}
@ -1066,8 +1017,7 @@ impl<'d, T: Instance> embassy_usb_driver::Endpoint for Endpoint<'d, T, In> {
T::state().ep_in_wakers[ep_index].register(cx.waker());
// SAFETY: atomic read without side effects
if unsafe { T::regs().diepctl(ep_index).read().usbaep() } {
if T::regs().diepctl(ep_index).read().usbaep() {
Poll::Ready(())
} else {
Poll::Pending
@ -1088,8 +1038,7 @@ impl<'d, T: Instance> embassy_usb_driver::Endpoint for Endpoint<'d, T, Out> {
T::state().ep_out_wakers[ep_index].register(cx.waker());
// SAFETY: atomic read without side effects
if unsafe { T::regs().doepctl(ep_index).read().usbaep() } {
if T::regs().doepctl(ep_index).read().usbaep() {
Poll::Ready(())
} else {
Poll::Pending
@ -1124,8 +1073,7 @@ impl<'d, T: Instance> embassy_usb_driver::EndpointOut for Endpoint<'d, T, Out> {
// Release buffer
state.ep_out_size[index].store(EP_OUT_BUFFER_EMPTY, Ordering::Release);
// SAFETY: DOEPCTL/DOEPTSIZ is shared with `Bus` so a critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
// Receive 1 packet
T::regs().doeptsiz(index).modify(|w| {
w.set_xfrsiz(self.info.max_packet_size as _);
@ -1163,8 +1111,7 @@ impl<'d, T: Instance> embassy_usb_driver::EndpointIn for Endpoint<'d, T, In> {
poll_fn(|cx| {
state.ep_in_wakers[index].register(cx.waker());
// SAFETY: atomic read with no side effects
let diepctl = unsafe { r.diepctl(index).read() };
let diepctl = r.diepctl(index).read();
if !diepctl.usbaep() {
Poll::Ready(Err(EndpointError::Disabled))
} else if !diepctl.epena() {
@ -1181,12 +1128,10 @@ impl<'d, T: Instance> embassy_usb_driver::EndpointIn for Endpoint<'d, T, In> {
let size_words = (buf.len() + 3) / 4;
// SAFETY: atomic read with no side effects
let fifo_space = unsafe { r.dtxfsts(index).read().ineptfsav() as usize };
let fifo_space = r.dtxfsts(index).read().ineptfsav() as usize;
if size_words > fifo_space {
// Not enough space in fifo, enable tx fifo empty interrupt
// SAFETY: DIEPEMPMSK is shared with IRQ so critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
r.diepempmsk().modify(|w| {
w.set_ineptxfem(w.ineptxfem() | (1 << index));
});
@ -1202,18 +1147,14 @@ impl<'d, T: Instance> embassy_usb_driver::EndpointIn for Endpoint<'d, T, In> {
.await
}
// SAFETY: DIEPTSIZ is exclusive to this endpoint under `&mut self`
unsafe {
// Setup transfer size
r.dieptsiz(index).write(|w| {
w.set_mcnt(1);
w.set_pktcnt(1);
w.set_xfrsiz(buf.len() as _);
});
}
// SAFETY: DIEPCTL is shared with `Bus` so a critical section is needed for RMW
critical_section::with(|_| unsafe {
critical_section::with(|_| {
// Enable endpoint
r.diepctl(index).modify(|w| {
w.set_cnak(true);
@ -1225,8 +1166,7 @@ impl<'d, T: Instance> embassy_usb_driver::EndpointIn for Endpoint<'d, T, In> {
for chunk in buf.chunks(4) {
let mut tmp = [0u8; 4];
tmp[0..chunk.len()].copy_from_slice(chunk);
// SAFETY: FIFO is exclusive to this endpoint under `&mut self`
unsafe { r.fifo(index).write_value(regs::Fifo(u32::from_ne_bytes(tmp))) };
r.fifo(index).write_value(regs::Fifo(u32::from_ne_bytes(tmp)));
}
trace!("write done ep={:?}", self.info.addr);
@ -1258,7 +1198,6 @@ impl<'d, T: Instance> embassy_usb_driver::ControlPipe for ControlPipe<'d, T> {
state.ep0_setup_ready.store(false, Ordering::Release);
// EP0 should not be controlled by `Bus` so this RMW does not need a critical section
unsafe {
// Receive 1 SETUP packet
T::regs().doeptsiz(self.ep_out.info.addr.index()).modify(|w| {
w.set_rxdpid_stupcnt(1);
@ -1268,7 +1207,6 @@ impl<'d, T: Instance> embassy_usb_driver::ControlPipe for ControlPipe<'d, T> {
T::regs().doepctl(self.ep_out.info.addr.index()).modify(|w| {
w.set_cnak(true);
});
}
trace!("SETUP received: {:?}", data);
Poll::Ready(data)
@ -1313,7 +1251,6 @@ impl<'d, T: Instance> embassy_usb_driver::ControlPipe for ControlPipe<'d, T> {
trace!("control: reject");
// EP0 should not be controlled by `Bus` so this RMW does not need a critical section
unsafe {
let regs = T::regs();
regs.diepctl(self.ep_in.info.addr.index()).modify(|w| {
w.set_stall(true);
@ -1322,11 +1259,10 @@ impl<'d, T: Instance> embassy_usb_driver::ControlPipe for ControlPipe<'d, T> {
w.set_stall(true);
});
}
}
async fn accept_set_address(&mut self, addr: u8) {
trace!("setting addr: {}", addr);
critical_section::with(|_| unsafe {
critical_section::with(|_| {
T::regs().dcfg().modify(|w| {
w.set_dad(addr);
});

6
embassy-stm32/src/wdg/mod.rs
View File

@ -48,11 +48,9 @@ impl<'d, T: Instance> IndependentWatchdog<'d, T> {
let rl = reload_value(psc, timeout_us);
let wdg = T::regs();
unsafe {
wdg.kr().write(|w| w.set_key(Key::ENABLE));
wdg.pr().write(|w| w.set_pr(Pr(pr)));
wdg.rlr().write(|w| w.set_rl(rl));
}
trace!(
"Watchdog configured with {}us timeout, desired was {}us (PR={}, RL={})",
@ -67,11 +65,11 @@ impl<'d, T: Instance> IndependentWatchdog<'d, T> {
}
}
pub unsafe fn unleash(&mut self) {
pub fn unleash(&mut self) {
T::regs().kr().write(|w| w.set_key(Key::START));
}
pub unsafe fn pet(&mut self) {
pub fn pet(&mut self) {
T::regs().kr().write(|w| w.set_key(Key::RESET));
}
}

4
examples/stm32f0/src/bin/wdg.rs
View File

@ -16,10 +16,10 @@ async fn main(_spawner: Spawner) {
let mut wdg = IndependentWatchdog::new(p.IWDG, 20_000_00);
info!("Watchdog start");
unsafe { wdg.unleash() };
wdg.unleash();
loop {
Timer::after(Duration::from_secs(1)).await;
unsafe { wdg.pet() };
wdg.pet();
}
}

4
examples/stm32f4/src/bin/wdt.rs
View File

@ -17,9 +17,7 @@ async fn main(_spawner: Spawner) {
let mut led = Output::new(p.PB7, Level::High, Speed::Low);
let mut wdt = IndependentWatchdog::new(p.IWDG, 1_000_000);
unsafe {
wdt.unleash();
}
let mut i = 0;
@ -36,10 +34,8 @@ async fn main(_spawner: Spawner) {
// MCU should restart in 1 second after the last pet.
if i < 5 {
info!("Petting watchdog");
unsafe {
wdt.pet();
}
}
i += 1;
}

2
examples/stm32g4/src/bin/usb_serial.rs
View File

@ -38,9 +38,7 @@ async fn main(_spawner: Spawner) {
let p = embassy_stm32::init(config);
info!("Hello World!");
unsafe {
pac::RCC.ccipr().write(|w| w.set_clk48sel(0b10));
}
let driver = Driver::new(p.USB, Irqs, p.PA12, p.PA11);

2
examples/stm32h5/src/bin/usb_serial.rs
View File

@ -45,11 +45,9 @@ async fn main(_spawner: Spawner) {
info!("Hello World!");
unsafe {
pac::RCC.ccipr4().write(|w| {
w.set_usbsel(pac::rcc::vals::Usbsel::HSI48);
});
}
// Create the driver, from the HAL.
let driver = Driver::new(p.USB, Irqs, p.PA12, p.PA11);

26
examples/stm32h7/src/bin/low_level_timer_api.rs
View File

@ -62,7 +62,6 @@ impl<'d, T: CaptureCompare32bitInstance> SimplePwm32<'d, T> {
T::enable();
<T as embassy_stm32::rcc::low_level::RccPeripheral>::reset();
unsafe {
ch1.set_speed(Speed::VeryHigh);
ch1.set_as_af(ch1.af_num(), AFType::OutputPushPull);
ch2.set_speed(Speed::VeryHigh);
@ -71,52 +70,43 @@ impl<'d, T: CaptureCompare32bitInstance> SimplePwm32<'d, T> {
ch3.set_as_af(ch1.af_num(), AFType::OutputPushPull);
ch4.set_speed(Speed::VeryHigh);
ch4.set_as_af(ch1.af_num(), AFType::OutputPushPull);
}
let mut this = Self { inner: tim };
this.set_freq(freq);
this.inner.start();
unsafe {
T::regs_gp32()
.ccmr_output(0)
let r = T::regs_gp32();
r.ccmr_output(0)
.modify(|w| w.set_ocm(0, OutputCompareMode::PwmMode1.into()));
T::regs_gp32()
.ccmr_output(0)
r.ccmr_output(0)
.modify(|w| w.set_ocm(1, OutputCompareMode::PwmMode1.into()));
T::regs_gp32()
.ccmr_output(1)
r.ccmr_output(1)
.modify(|w| w.set_ocm(0, OutputCompareMode::PwmMode1.into()));
T::regs_gp32()
.ccmr_output(1)
r.ccmr_output(1)
.modify(|w| w.set_ocm(1, OutputCompareMode::PwmMode1.into()));
}
this
}
pub fn enable(&mut self, channel: Channel) {
unsafe {
T::regs_gp32().ccer().modify(|w| w.set_cce(channel.raw(), true));
}
}
pub fn disable(&mut self, channel: Channel) {
unsafe {
T::regs_gp32().ccer().modify(|w| w.set_cce(channel.raw(), false));
}
}
pub fn set_freq(&mut self, freq: Hertz) {
<T as embassy_stm32::timer::low_level::GeneralPurpose32bitInstance>::set_frequency(&mut self.inner, freq);
}
pub fn get_max_duty(&self) -> u32 {
unsafe { T::regs_gp32().arr().read().arr() }
T::regs_gp32().arr().read().arr()
}
pub fn set_duty(&mut self, channel: Channel, duty: u32) {
defmt::assert!(duty < self.get_max_duty());
unsafe { T::regs_gp32().ccr(channel.raw()).modify(|w| w.set_ccr(duty)) }
T::regs_gp32().ccr(channel.raw()).modify(|w| w.set_ccr(duty))
}
}

4
examples/stm32h7/src/bin/wdg.rs
View File

@ -15,10 +15,10 @@ async fn main(_spawner: Spawner) {
let mut wdg = IndependentWatchdog::new(p.IWDG1, 20_000_000);
unsafe { wdg.unleash() };
wdg.unleash();
loop {
Timer::after(Duration::from_secs(1)).await;
unsafe { wdg.pet() };
wdg.pet();
}
}

2
examples/stm32l4/src/bin/adc.rs
View File

@ -12,12 +12,10 @@ use {defmt_rtt as _, panic_probe as _};
fn main() -> ! {
info!("Hello World!");
unsafe {
pac::RCC.ccipr().modify(|w| {
w.set_adcsel(0b11);
});
pac::RCC.ahb2enr().modify(|w| w.set_adcen(true));
}
let p = embassy_stm32::init(Default::default());

2
examples/stm32l4/src/bin/dac.rs
View File

@ -11,11 +11,9 @@ use {defmt_rtt as _, panic_probe as _};
fn main() -> ! {
info!("Hello World!");
unsafe {
pac::RCC.apb1enr1().modify(|w| {
w.set_dac1en(true);
});
}
let p = embassy_stm32::init(Default::default());

2
examples/stm32wl/src/bin/lora_lorawan.rs
View File

@ -35,7 +35,7 @@ async fn main(_spawner: Spawner) {
config.rcc.enable_lsi = true; // enable RNG
let p = embassy_stm32::init(config);
unsafe { pac::RCC.ccipr().modify(|w| w.set_rngsel(0b01)) }
pac::RCC.ccipr().modify(|w| w.set_rngsel(0b01));
let spi = Spi::new_subghz(p.SUBGHZSPI, p.DMA1_CH1, p.DMA1_CH2);

2
examples/stm32wl/src/bin/random.rs
View File

@ -15,11 +15,9 @@ async fn main(_spawner: Spawner) {
config.rcc.enable_lsi = true; //Needed for RNG to work
let p = embassy_stm32::init(config);
unsafe {
pac::RCC.ccipr().modify(|w| {
w.set_rngsel(0b01);
});
}
info!("Hello World!");

2
tests/stm32/src/bin/rtc.rs
View File

@ -24,10 +24,8 @@ async fn main(_spawner: Spawner) {
info!("Starting LSI");
unsafe {
pac::RCC.csr().modify(|w| w.set_lsion(true));
while !pac::RCC.csr().read().lsirdy() {}
}
info!("Started LSI");

9
tests/stm32/src/bin/usart_dma.rs
View File

@ -69,12 +69,14 @@ async fn main(_spawner: Spawner) {
const LEN: usize = 128;
let mut tx_buf = [0; LEN];
let mut rx_buf = [0; LEN];
for i in 0..LEN {
tx_buf[i] = i as u8;
}
let (mut tx, mut rx) = usart.split();
for n in 0..42 {
for i in 0..LEN {
tx_buf[i] = (i ^ n) as u8;
}
let tx_fut = async {
tx.write(&tx_buf).await.unwrap();
};
@ -87,6 +89,7 @@ async fn main(_spawner: Spawner) {
join(rx_fut, tx_fut).await;
assert_eq!(tx_buf, rx_buf);
}
info!("Test OK");
cortex_m::asm::bkpt();