stm32: update stm32-metapac. Fixes USB on STM32WB.

docs: document all public apis of embedded-hal-internal

docs/modules/ROOT/nav.adoc

@@ -2,6 +2,7 @@
 ** xref:basic_application.adoc[Basic application]
 ** xref:project_structure.adoc[Project Structure]
 ** xref:new_project.adoc[Starting a new Embassy project]
+** xref:best_practices.adoc[Best Practices]
 * xref:layer_by_layer.adoc[Bare metal to async]
 * xref:runtime.adoc[Executor]
 * xref:delaying_a_task.adoc[Delaying a Task]
@@ -11,7 +12,7 @@
 * xref:bootloader.adoc[Bootloader]
 
 * xref:examples.adoc[Examples]
-* xref:developer.adoc[Developer]
-** xref:developer_stm32.adoc[Developer: STM32]
+* xref:developer.adoc[Developer Docs]
+** xref:developer_stm32.adoc[Developer Docs: STM32]
 * xref:embassy_in_the_wild.adoc[Embassy in the wild]
 * xref:faq.adoc[Frequently Asked Questions]

docs/modules/ROOT/pages/best_practices.adoc

@@ -0,0 +1,53 @@
+= Best Practices
+
+Over time, a couple of best practices have emerged. The following list should serve as a guideline for developers writing embedded software in _Rust_, especially in the context of the _Embassy_ framework.
+
+== Passing Buffers by Reference
+It may be tempting to pass arrays or wrappers, like link:https://docs.rs/heapless/latest/heapless/[`heapless::Vec`], to a function or return one just like you would with a `std::Vec`. However, in most embedded applications you don't want to spend ressources on an allocator and end up placing buffers on the stack.
+This, however, can easily blow up your stack if you are not careful.
+
+Consider the following example:
+[,rust]
+----
+fn process_buffer(mut buf: [u8; 1024]) -> [u8; 1024] {
+    // do stuff and return new buffer
+    for elem in buf.iter_mut() {
+        *elem = 0;
+    }
+    buf
+}
+
+pub fn main() -> () {
+    let buf = [1u8; 1024];
+    let buf_new = process_buffer(buf);
+    // do stuff with buf_new
+    ()
+}
+----
+When calling `process_buffer` in your program, a copy of the buffer you pass to the function will be created,
+consuming another 1024 bytes.
+After the processing, another 1024 byte buffer will be placed on the stack to be returned to the caller.
+(You can check the assembly, there will be two memcopy operations, e.g., `bl __aeabi_memcpy` when compiling for a Cortex-M processor.)
+
+*Possible Solution:*
+
+Pass the data by reference and not by value on both, the way in and the way out.
+For example, you could return a slice of the input buffer as the output.
+Requiring the lifetime of the input slice and the output slice to be the same, the memory safetly of this procedure will be enforced by the compiler.
+
+[,rust]
+----
+fn process_buffer<'a>(buf: &'a mut [u8]) -> &'a mut[u8] {
+    for elem in buf.iter_mut() {
+        *elem = 0;
+    }
+    buf
+}
+
+pub fn main() -> () {
+    let mut buf = [1u8; 1024];
+    let buf_new = process_buffer(&mut buf);
+    // do stuff with buf_new
+    ()
+}
+----

docs/modules/ROOT/pages/faq.adoc

@@ -47,7 +47,8 @@ The first step to managing your binary size is to set up your link:https://doc.r
 debug = false
 lto = true
 opt-level = "s"
-incremental = true
+incremental = false
+codegen-units = 1
 ----
 
 All of these flags are elaborated on in the Rust Book page linked above.
@@ -135,3 +136,20 @@ embassy-time = { git = "https://github.com/embassy-rs/embassy.git", rev = "e5fdd
 ----
 
 Note that the git revision should match any other embassy patches or git dependencies that you are using!
+
+== How can I optimize the speed of my embassy-stm32 program?
+
+* Make sure RCC is set up to go as fast as possible
+* Make sure link:https://docs.rs/cortex-m/latest/cortex_m/peripheral/struct.SCB.html[flash cache] is enabled
+* build with `--release`
+* Set the following keys for the release profile in your `Cargo.toml`:
+    ** `opt-level = "s"`
+    ** `lto = "fat"`
+* Set the following keys in the `[unstable]` section of your `.cargo/config.toml`
+    ** `build-std = ["core"]`
+    ** `build-std-features = ["panic_immediate_abort"]`
+* Enable feature `embassy-time/generic-queue`, disable feature `embassy-executor/integrated-timers`
+* When using `InterruptExecutor`:
+    ** disable `executor-thread`
+    ** make `main`` spawn everything, then enable link:https://docs.rs/cortex-m/latest/cortex_m/peripheral/struct.SCB.html#method.set_sleeponexit[SCB.SLEEPONEXIT] and `loop { cortex_m::asm::wfi() }`
+    ** *Note:*  If you need 2 priority levels, using 2 interrupt executors is better than 1 thread executor + 1 interrupt executor.

embassy-nrf/src/lib.rs

@@ -97,6 +97,28 @@ mod chip;
 /// This defines the right interrupt handlers, and creates a unit struct (like `struct Irqs;`)
 /// and implements the right [`Binding`]s for it. You can pass this struct to drivers to
 /// prove at compile-time that the right interrupts have been bound.
+///
+/// Example of how to bind one interrupt:
+///
+/// ```rust,ignore
+/// use embassy_nrf::{bind_interrupts, spim, peripherals};
+///
+/// bind_interrupts!(struct Irqs {
+///     SPIM3 => spim::InterruptHandler<peripherals::SPI3>;
+/// });
+/// ```
+///
+/// Example of how to bind multiple interrupts in a single macro invocation:
+///
+/// ```rust,ignore
+/// use embassy_nrf::{bind_interrupts, spim, twim, peripherals};
+///
+/// bind_interrupts!(struct Irqs {
+///     SPIM3 => spim::InterruptHandler<peripherals::SPI3>;
+///     SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0 => twim::InterruptHandler<peripherals::TWISPI0>;
+/// });
+/// ```
+
 // developer note: this macro can't be in `embassy-hal-internal` due to the use of `$crate`.
 #[macro_export]
 macro_rules! bind_interrupts {

embassy-rp/src/lib.rs

@@ -86,6 +86,17 @@ embassy_hal_internal::interrupt_mod!(
 /// This defines the right interrupt handlers, and creates a unit struct (like `struct Irqs;`)
 /// and implements the right [`Binding`]s for it. You can pass this struct to drivers to
 /// prove at compile-time that the right interrupts have been bound.
+///
+/// Example of how to bind one interrupt:
+///
+/// ```rust,ignore
+/// use embassy_rp::{bind_interrupts, usb, peripherals};
+///
+/// bind_interrupts!(struct Irqs {
+///     USBCTRL_IRQ => usb::InterruptHandler<peripherals::USB>;
+/// });
+/// ```
+///
 // developer note: this macro can't be in `embassy-hal-internal` due to the use of `$crate`.
 #[macro_export]
 macro_rules! bind_interrupts {

embassy-stm32/Cargo.toml

@@ -58,7 +58,7 @@ rand_core = "0.6.3"
 sdio-host = "0.5.0"
 embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
 critical-section = "1.1"
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-7117ad49c06fa00c388130a34977e029910083bd" }
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-8f5fcae8c289c1ad481cc3a2bb37db023a61599c" }
 vcell = "0.1.3"
 bxcan = "0.7.0"
 nb = "1.0.0"
@@ -76,7 +76,7 @@ critical-section = { version = "1.1", features = ["std"] }
 [build-dependencies]
 proc-macro2 = "1.0.36"
 quote = "1.0.15"
-stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-7117ad49c06fa00c388130a34977e029910083bd", default-features = false, features = ["metadata"]}
+stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-8f5fcae8c289c1ad481cc3a2bb37db023a61599c", default-features = false, features = ["metadata"]}
 
 
 [features]

embassy-stm32/build.rs

@@ -930,6 +930,10 @@ fn main() {
                     } else if pin.signal.starts_with("INN") {
                         // TODO handle in the future when embassy supports differential measurements
                         None
+                    } else if pin.signal.starts_with("IN") && pin.signal.ends_with("b") {
+                        // we number STM32L1 ADC bank 1 as 0..=31, bank 2 as 32..=63
+                        let signal = pin.signal.strip_prefix("IN").unwrap().strip_suffix("b").unwrap();
+                        Some(32u8 + signal.parse::<u8>().unwrap())
                     } else if pin.signal.starts_with("IN") {
                         Some(pin.signal.strip_prefix("IN").unwrap().parse().unwrap())
                     } else {

embassy-stm32/src/adc/f1.rs

@@ -148,7 +148,7 @@ impl<'d, T: Instance> Adc<'d, T> {
             reg.set_cont(false);
             reg.set_exttrig(true);
             reg.set_swstart(false);
-            reg.set_extsel(crate::pac::adc::vals::Extsel::SWSTART);
+            reg.set_extsel(7); // SWSTART
         });
 
         // Configure the channel to sample

embassy-stm32/src/adc/f3_v1_1.rs

@@ -0,0 +1,413 @@
+use core::future::poll_fn;
+use core::marker::PhantomData;
+use core::task::Poll;
+
+use embassy_futures::yield_now;
+use embassy_hal_internal::into_ref;
+use embassy_time::Instant;
+
+use super::Resolution;
+use crate::adc::{Adc, AdcPin, Instance, SampleTime};
+use crate::interrupt::typelevel::Interrupt;
+use crate::time::Hertz;
+use crate::{interrupt, Peripheral};
+
+const ADC_FREQ: Hertz = crate::rcc::HSI_FREQ;
+
+pub const VDDA_CALIB_MV: u32 = 3300;
+pub const ADC_MAX: u32 = (1 << 12) - 1;
+pub const VREF_INT: u32 = 1230;
+
+pub enum AdcPowerMode {
+    AlwaysOn,
+    DelayOff,
+    IdleOff,
+    DelayIdleOff,
+}
+
+pub enum Prescaler {
+    Div1,
+    Div2,
+    Div3,
+    Div4,
+}
+
+/// Interrupt handler.
+pub struct InterruptHandler<T: Instance> {
+    _phantom: PhantomData<T>,
+}
+
+impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandler<T> {
+    unsafe fn on_interrupt() {
+        if T::regs().sr().read().eoc() {
+            T::regs().cr1().modify(|w| w.set_eocie(false));
+        } else {
+            return;
+        }
+
+        T::state().waker.wake();
+    }
+}
+
+fn update_vref<T: Instance>(op: i8) {
+    static VREF_STATUS: core::sync::atomic::AtomicU8 = core::sync::atomic::AtomicU8::new(0);
+
+    if op > 0 {
+        if VREF_STATUS.fetch_add(1, core::sync::atomic::Ordering::SeqCst) == 0 {
+            T::regs().ccr().modify(|w| w.set_tsvrefe(true));
+        }
+    } else {
+        if VREF_STATUS.fetch_sub(1, core::sync::atomic::Ordering::SeqCst) == 1 {
+            T::regs().ccr().modify(|w| w.set_tsvrefe(false));
+        }
+    }
+}
+
+pub struct Vref<T: Instance>(core::marker::PhantomData<T>);
+impl<T: Instance> AdcPin<T> for Vref<T> {}
+impl<T: Instance> super::sealed::AdcPin<T> for Vref<T> {
+    fn channel(&self) -> u8 {
+        17
+    }
+}
+
+impl<T: Instance> Vref<T> {
+    /// The value that vref would be if vdda was at 3000mv
+    pub fn calibrated_value(&self) -> u16 {
+        crate::pac::VREFINTCAL.data().read().value()
+    }
+
+    pub async fn calibrate(&mut self, adc: &mut Adc<'_, T>) -> Calibration {
+        let vref_val = adc.read(self).await;
+        Calibration {
+            vref_cal: self.calibrated_value(),
+            vref_val,
+        }
+    }
+}
+
+pub struct Calibration {
+    vref_cal: u16,
+    vref_val: u16,
+}
+
+impl Calibration {
+    /// The millivolts that the calibration value was measured at
+    pub const CALIBRATION_UV: u32 = 3_000_000;
+
+    /// Returns the measured VddA in microvolts (uV)
+    pub fn vdda_uv(&self) -> u32 {
+        (Self::CALIBRATION_UV * self.vref_cal as u32) / self.vref_val as u32
+    }
+
+    /// Returns the measured VddA as an f32
+    pub fn vdda_f32(&self) -> f32 {
+        (Self::CALIBRATION_UV as f32 / 1_000.0) * (self.vref_cal as f32 / self.vref_val as f32)
+    }
+
+    /// Returns a calibrated voltage value as in microvolts (uV)
+    pub fn cal_uv(&self, raw: u16, resolution: super::Resolution) -> u32 {
+        (self.vdda_uv() / resolution.to_max_count()) * raw as u32
+    }
+
+    /// Returns a calibrated voltage value as an f32
+    pub fn cal_f32(&self, raw: u16, resolution: super::Resolution) -> f32 {
+        raw as f32 * self.vdda_f32() / resolution.to_max_count() as f32
+    }
+}
+
+impl<T: Instance> Drop for Vref<T> {
+    fn drop(&mut self) {
+        update_vref::<T>(-1)
+    }
+}
+
+pub struct Temperature<T: Instance>(core::marker::PhantomData<T>);
+impl<T: Instance> AdcPin<T> for Temperature<T> {}
+impl<T: Instance> super::sealed::AdcPin<T> for Temperature<T> {
+    fn channel(&self) -> u8 {
+        16
+    }
+}
+
+impl<T: Instance> Drop for Temperature<T> {
+    fn drop(&mut self) {
+        update_vref::<T>(-1)
+    }
+}
+
+impl<'d, T: Instance> Adc<'d, T> {
+    pub fn new(
+        adc: impl Peripheral<P = T> + 'd,
+        _irq: impl interrupt::typelevel::Binding<T::Interrupt, InterruptHandler<T>> + 'd,
+    ) -> Self {
+        into_ref!(adc);
+
+        T::enable_and_reset();
+
+        //let r = T::regs();
+        //r.cr2().write(|w| w.set_align(true));
+
+        T::Interrupt::unpend();
+        unsafe {
+            T::Interrupt::enable();
+        }
+
+        Self { adc }
+    }
+
+    fn freq() -> Hertz {
+        let div = T::regs().ccr().read().adcpre() + 1;
+        ADC_FREQ / div as u32
+    }
+
+    pub async fn set_resolution(&mut self, res: Resolution) {
+        let was_on = Self::is_on();
+        if was_on {
+            self.stop_adc().await;
+        }
+
+        T::regs().cr1().modify(|w| w.set_res(res.into()));
+
+        if was_on {
+            self.start_adc().await;
+        }
+    }
+
+    pub fn resolution(&self) -> Resolution {
+        match T::regs().cr1().read().res() {
+            crate::pac::adc::vals::Res::TWELVEBIT => Resolution::TwelveBit,
+            crate::pac::adc::vals::Res::TENBIT => Resolution::TenBit,
+            crate::pac::adc::vals::Res::EIGHTBIT => Resolution::EightBit,
+            crate::pac::adc::vals::Res::SIXBIT => Resolution::SixBit,
+        }
+    }
+
+    pub fn enable_vref(&self) -> Vref<T> {
+        update_vref::<T>(1);
+
+        Vref(core::marker::PhantomData)
+    }
+
+    pub fn enable_temperature(&self) -> Temperature<T> {
+        T::regs().ccr().modify(|w| w.set_tsvrefe(true));
+
+        Temperature::<T>(core::marker::PhantomData)
+    }
+
+    /// Perform a single conversion.
+    async fn convert(&mut self) -> u16 {
+        let was_on = Self::is_on();
+
+        if !was_on {
+            self.start_adc().await;
+        }
+
+        self.wait_sample_ready().await;
+
+        T::regs().sr().write(|_| {});
+        T::regs().cr1().modify(|w| {
+            w.set_eocie(true);
+            w.set_scan(false);
+        });
+        T::regs().cr2().modify(|w| {
+            w.set_swstart(true);
+            w.set_cont(false);
+        }); // swstart cleared by HW
+
+        let res = poll_fn(|cx| {
+            T::state().waker.register(cx.waker());
+
+            if T::regs().sr().read().eoc() {
+                let res = T::regs().dr().read().rdata();
+                Poll::Ready(res)
+            } else {
+                Poll::Pending
+            }
+        })
+        .await;
+
+        if !was_on {
+            self.stop_adc().await;
+        }
+
+        res
+    }
+
+    #[inline(always)]
+    fn is_on() -> bool {
+        T::regs().sr().read().adons() || T::regs().cr2().read().adon()
+    }
+
+    pub async fn start_adc(&self) {
+        //defmt::trace!("Turn ADC on");
+        T::regs().cr2().modify(|w| w.set_adon(true));
+        //defmt::trace!("Waiting for ADC to turn on");
+
+        let mut t = Instant::now();
+
+        while !T::regs().sr().read().adons() {
+            yield_now().await;
+            if t.elapsed() > embassy_time::Duration::from_millis(1000) {
+                t = Instant::now();
+                //defmt::trace!("ADC still not on");
+            }
+        }
+
+        //defmt::trace!("ADC on");
+    }
+
+    pub async fn stop_adc(&self) {
+        if T::regs().cr2().read().adon() {
+            //defmt::trace!("ADC should be on, wait for it to start");
+            while !T::regs().csr().read().adons1() {
+                yield_now().await;
+            }
+        }
+
+        //defmt::trace!("Turn ADC off");
+
+        T::regs().cr2().modify(|w| w.set_adon(false));
+
+        //defmt::trace!("Waiting for ADC to turn off");
+
+        while T::regs().csr().read().adons1() {
+            yield_now().await;
+        }
+    }
+
+    pub async fn read(&mut self, pin: &mut impl AdcPin<T>) -> u16 {
+        self.set_sample_sequence(&[pin.channel()]).await;
+        self.convert().await
+    }
+
+    async fn wait_sample_ready(&self) {
+        //trace!("Waiting for sample channel to be ready");
+        while T::regs().sr().read().rcnr() {
+            yield_now().await;
+        }
+    }
+
+    pub async fn set_sample_time(&mut self, pin: &mut impl AdcPin<T>, sample_time: SampleTime) {
+        if Self::get_channel_sample_time(pin.channel()) != sample_time {
+            self.stop_adc().await;
+            unsafe {
+                Self::set_channel_sample_time(pin.channel(), sample_time);
+            }
+            self.start_adc().await;
+        }
+    }
+
+    pub fn get_sample_time(&self, pin: &impl AdcPin<T>) -> SampleTime {
+        Self::get_channel_sample_time(pin.channel())
+    }
+
+    /// Sets the channel sample time
+    ///
+    /// ## SAFETY:
+    /// - ADON == 0 i.e ADC must not be enabled when this is called.
+    unsafe fn set_channel_sample_time(ch: u8, sample_time: SampleTime) {
+        let sample_time = sample_time.into();
+
+        match ch {
+            0..=9 => T::regs().smpr3().modify(|reg| reg.set_smp(ch as _, sample_time)),
+            10..=19 => T::regs()
+                .smpr2()
+                .modify(|reg| reg.set_smp(ch as usize - 10, sample_time)),
+            20..=29 => T::regs()
+                .smpr1()
+                .modify(|reg| reg.set_smp(ch as usize - 20, sample_time)),
+            30..=31 => T::regs()
+                .smpr0()
+                .modify(|reg| reg.set_smp(ch as usize - 30, sample_time)),
+            _ => panic!("Invalid channel to sample"),
+        }
+    }
+
+    fn get_channel_sample_time(ch: u8) -> SampleTime {
+        match ch {
+            0..=9 => T::regs().smpr3().read().smp(ch as _),
+            10..=19 => T::regs().smpr2().read().smp(ch as usize - 10),
+            20..=29 => T::regs().smpr1().read().smp(ch as usize - 20),
+            30..=31 => T::regs().smpr0().read().smp(ch as usize - 30),
+            _ => panic!("Invalid channel to sample"),
+        }
+        .into()
+    }
+
+    /// Sets the sequence to sample the ADC. Must be less than 28 elements.
+    async fn set_sample_sequence(&self, sequence: &[u8]) {
+        assert!(sequence.len() <= 28);
+        let mut iter = sequence.iter();
+        T::regs().sqr1().modify(|w| w.set_l((sequence.len() - 1) as _));
+        for (idx, ch) in iter.by_ref().take(6).enumerate() {
+            T::regs().sqr5().modify(|w| w.set_sq(idx, *ch));
+        }
+        for (idx, ch) in iter.by_ref().take(6).enumerate() {
+            T::regs().sqr4().modify(|w| w.set_sq(idx, *ch));
+        }
+        for (idx, ch) in iter.by_ref().take(6).enumerate() {
+            T::regs().sqr3().modify(|w| w.set_sq(idx, *ch));
+        }
+        for (idx, ch) in iter.by_ref().take(6).enumerate() {
+            T::regs().sqr2().modify(|w| w.set_sq(idx, *ch));
+        }
+        for (idx, ch) in iter.by_ref().take(4).enumerate() {
+            T::regs().sqr1().modify(|w| w.set_sq(idx, *ch));
+        }
+    }
+
+    fn get_res_clks(res: Resolution) -> u32 {
+        match res {
+            Resolution::TwelveBit => 12,
+            Resolution::TenBit => 11,
+            Resolution::EightBit => 9,
+            Resolution::SixBit => 7,
+        }
+    }
+
+    fn get_sample_time_clks(sample_time: SampleTime) -> u32 {
+        match sample_time {
+            SampleTime::Cycles4 => 4,
+            SampleTime::Cycles9 => 9,
+            SampleTime::Cycles16 => 16,
+            SampleTime::Cycles24 => 24,
+            SampleTime::Cycles48 => 48,
+            SampleTime::Cycles96 => 96,
+            SampleTime::Cycles192 => 192,
+            SampleTime::Cycles384 => 384,
+        }
+    }
+
+    pub fn sample_time_for_us(&self, us: u32) -> SampleTime {
+        let res_clks = Self::get_res_clks(self.resolution());
+        let us_clks = us * Self::freq().0 / 1_000_000;
+        let clks = us_clks.saturating_sub(res_clks);
+        match clks {
+            0..=4 => SampleTime::Cycles4,
+            5..=9 => SampleTime::Cycles9,
+            10..=16 => SampleTime::Cycles16,
+            17..=24 => SampleTime::Cycles24,
+            25..=48 => SampleTime::Cycles48,
+            49..=96 => SampleTime::Cycles96,
+            97..=192 => SampleTime::Cycles192,
+            193.. => SampleTime::Cycles384,
+        }
+    }
+
+    pub fn us_for_cfg(&self, res: Resolution, sample_time: SampleTime) -> u32 {
+        let res_clks = Self::get_res_clks(res);
+        let sample_clks = Self::get_sample_time_clks(sample_time);
+        (res_clks + sample_clks) * 1_000_000 / Self::freq().0
+    }
+}
+
+impl<'d, T: Instance> Drop for Adc<'d, T> {
+    fn drop(&mut self) {
+        while !T::regs().sr().read().adons() {}
+
+        T::regs().cr2().modify(|w| w.set_adon(false));
+
+        T::disable();
+    }
+}

embassy-stm32/src/adc/mod.rs

@@ -3,6 +3,7 @@
 #[cfg(not(adc_f3_v2))]
 #[cfg_attr(adc_f1, path = "f1.rs")]
 #[cfg_attr(adc_f3, path = "f3.rs")]
+#[cfg_attr(adc_f3_v1_1, path = "f3_v1_1.rs")]
 #[cfg_attr(adc_v1, path = "v1.rs")]
 #[cfg_attr(adc_v2, path = "v2.rs")]
 #[cfg_attr(any(adc_v3, adc_g0), path = "v3.rs")]
@@ -26,20 +27,20 @@ use crate::peripherals;
 pub struct Adc<'d, T: Instance> {
     #[allow(unused)]
     adc: crate::PeripheralRef<'d, T>,
-    #[cfg(not(adc_f3_v2))]
+    #[cfg(not(any(adc_f3_v2, adc_f3_v1_1)))]
     sample_time: SampleTime,
 }
 
 pub(crate) mod sealed {
-    #[cfg(any(adc_f1, adc_f3, adc_v1))]
+    #[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
     use embassy_sync::waitqueue::AtomicWaker;
 
-    #[cfg(any(adc_f1, adc_f3, adc_v1))]
+    #[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
     pub struct State {
         pub waker: AtomicWaker,
     }
 
-    #[cfg(any(adc_f1, adc_f3, adc_v1))]
+    #[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
     impl State {
         pub const fn new() -> Self {
             Self {
@@ -54,11 +55,11 @@ pub(crate) mod sealed {
 
     pub trait Instance: InterruptableInstance {
         fn regs() -> crate::pac::adc::Adc;
-        #[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_g0)))]
+        #[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_f3_v1_1, adc_g0)))]
         fn common_regs() -> crate::pac::adccommon::AdcCommon;
         #[cfg(adc_f3)]
         fn frequency() -> crate::time::Hertz;
-        #[cfg(any(adc_f1, adc_f3, adc_v1))]
+        #[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
         fn state() -> &'static State;
     }
 
@@ -74,9 +75,9 @@ pub(crate) mod sealed {
     }
 }
 
-#[cfg(not(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_g0)))]
+#[cfg(not(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_f3_v1_1, adc_g0)))]
 pub trait Instance: sealed::Instance + crate::Peripheral<P = Self> {}
-#[cfg(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_g0))]
+#[cfg(any(adc_f1, adc_v1, adc_v2, adc_v3, adc_v4, adc_f3, adc_f3_v1_1, adc_g0))]
 pub trait Instance: sealed::Instance + crate::Peripheral<P = Self> + crate::rcc::RccPeripheral {}
 
 pub trait AdcPin<T: Instance>: sealed::AdcPin<T> {}
@@ -89,7 +90,7 @@ foreach_adc!(
                 crate::pac::$inst
             }
 
-            #[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_g0)))]
+            #[cfg(not(any(adc_f1, adc_v1, adc_f3_v2, adc_f3_v1_1, adc_g0)))]
             fn common_regs() -> crate::pac::adccommon::AdcCommon {
                 return crate::pac::$common_inst
             }
@@ -99,7 +100,7 @@ foreach_adc!(
                 unsafe { crate::rcc::get_freqs() }.$clock.unwrap()
             }
 
-            #[cfg(any(adc_f1, adc_f3, adc_v1))]
+            #[cfg(any(adc_f1, adc_f3, adc_v1, adc_f3_v1_1))]
             fn state() -> &'static sealed::State {
                 static STATE: sealed::State = sealed::State::new();
                 &STATE

embassy-stm32/src/adc/resolution.rs

@@ -1,5 +1,6 @@
-#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
+#[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum Resolution {
     TwelveBit,
     TenBit,
@@ -9,6 +10,7 @@ pub enum Resolution {
 
 #[cfg(adc_v4)]
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum Resolution {
     SixteenBit,
     FourteenBit,
@@ -19,7 +21,7 @@ pub enum Resolution {
 
 impl Default for Resolution {
     fn default() -> Self {
-        #[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
+        #[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
         {
             Self::TwelveBit
         }
@@ -40,7 +42,7 @@ impl From<Resolution> for crate::pac::adc::vals::Res {
             Resolution::TwelveBit => crate::pac::adc::vals::Res::TWELVEBIT,
             Resolution::TenBit => crate::pac::adc::vals::Res::TENBIT,
             Resolution::EightBit => crate::pac::adc::vals::Res::EIGHTBIT,
-            #[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
+            #[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
             Resolution::SixBit => crate::pac::adc::vals::Res::SIXBIT,
         }
     }
@@ -56,7 +58,7 @@ impl Resolution {
             Resolution::TwelveBit => (1 << 12) - 1,
             Resolution::TenBit => (1 << 10) - 1,
             Resolution::EightBit => (1 << 8) - 1,
-            #[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3))]
+            #[cfg(any(adc_v1, adc_v2, adc_v3, adc_g0, adc_f3, adc_f3_v1_1))]
             Resolution::SixBit => (1 << 6) - 1,
         }
     }

embassy-stm32/src/adc/sample_time.rs

@@ -3,6 +3,7 @@ macro_rules! impl_sample_time {
     ($default_doc:expr, $default:ident, ($(($doc:expr, $variant:ident, $pac_variant:ident)),*)) => {
         #[doc = concat!("ADC sample time\n\nThe default setting is ", $default_doc, " ADC clock cycles.")]
         #[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd)]
+        #[cfg_attr(feature = "defmt", derive(defmt::Format))]
         pub enum SampleTime {
             $(
                 #[doc = concat!($doc, " ADC clock cycles.")]
@@ -18,6 +19,14 @@ macro_rules! impl_sample_time {
             }
         }
 
+        impl From<crate::pac::adc::vals::SampleTime> for SampleTime {
+            fn from(sample_time: crate::pac::adc::vals::SampleTime) -> SampleTime {
+                match sample_time {
+                    $(crate::pac::adc::vals::SampleTime::$pac_variant => SampleTime::$variant),*
+                }
+            }
+        }
+
         impl Default for SampleTime {
             fn default() -> Self {
                 Self::$default
@@ -121,3 +130,19 @@ impl_sample_time!(
         ("601.5", Cycles601_5, CYCLES601_5)
     )
 );
+
+#[cfg(any(adc_f3_v1_1))]
+impl_sample_time!(
+    "4",
+    Cycles4,
+    (
+        ("4", Cycles4, CYCLES4),
+        ("9", Cycles9, CYCLES9),
+        ("16", Cycles16, CYCLES16),
+        ("24", Cycles24, CYCLES24),
+        ("48", Cycles48, CYCLES48),
+        ("96", Cycles96, CYCLES96),
+        ("192", Cycles192, CYCLES192),
+        ("384", Cycles384, CYCLES384)
+    )
+);

embassy-stm32/src/can/mod.rs

@@ -1,6 +1,6 @@
 #![macro_use]
 
 #[cfg_attr(can_bxcan, path = "bxcan.rs")]
-#[cfg_attr(can_fdcan, path = "fdcan.rs")]
+#[cfg_attr(any(can_fdcan_v1, can_fdcan_h7), path = "fdcan.rs")]
 mod _version;
 pub use _version::*;

embassy-stm32/src/lib.rs

@@ -90,6 +90,29 @@ pub use crate::_generated::interrupt;
 /// This defines the right interrupt handlers, and creates a unit struct (like `struct Irqs;`)
 /// and implements the right [`Binding`]s for it. You can pass this struct to drivers to
 /// prove at compile-time that the right interrupts have been bound.
+///
+/// Example of how to bind one interrupt:
+///
+/// ```rust,ignore
+/// use embassy_stm32::{bind_interrupts, usb_otg, peripherals};
+///
+/// bind_interrupts!(struct Irqs {
+///     OTG_FS => usb_otg::InterruptHandler<peripherals::USB_OTG_FS>;
+/// });
+/// ```
+///
+/// Example of how to bind multiple interrupts, and multiple handlers to each interrupt, in a single macro invocation:
+///
+/// ```rust,ignore
+/// use embassy_stm32::{bind_interrupts, i2c, peripherals};
+///
+/// bind_interrupts!(struct Irqs {
+///     I2C1 => i2c::EventInterruptHandler<peripherals::I2C1>, i2c::ErrorInterruptHandler<peripherals::I2C1>;
+///     I2C2_3 => i2c::EventInterruptHandler<peripherals::I2C2>, i2c::ErrorInterruptHandler<peripherals::I2C2>,
+///         i2c::EventInterruptHandler<peripherals::I2C3>, i2c::ErrorInterruptHandler<peripherals::I2C3>;
+/// });
+/// ```
+
 // developer note: this macro can't be in `embassy-hal-internal` due to the use of `$crate`.
 #[macro_export]
 macro_rules! bind_interrupts {

embassy-stm32/src/rcc/g4.rs

@@ -308,6 +308,7 @@ pub(crate) unsafe fn init(config: Config) {
         sys: sys_clk,
         hclk1: ahb_freq,
         hclk2: ahb_freq,
+        hclk3: ahb_freq,
         pclk1: apb1_freq,
         pclk1_tim: apb1_tim_freq,
         pclk2: apb2_freq,
@@ -315,6 +316,8 @@ pub(crate) unsafe fn init(config: Config) {
         adc: adc12_ck,
         adc34: adc345_ck,
         pll1_p: None,
+        pll1_q: None, // TODO
+        hse: None,    // TODO
         rtc,
     });
 }

embassy-stm32/src/rcc/mod.rs

@@ -95,6 +95,7 @@ pub struct Clocks {
         rcc_h7rm0433,
         rcc_h7ab,
         rcc_u5,
+        rcc_g4,
         rcc_wb,
         rcc_wl5,
         rcc_wle
@@ -119,7 +120,7 @@ pub struct Clocks {
 
     #[cfg(any(stm32g4, rcc_l4))]
     pub pll1_p: Option<Hertz>,
-    #[cfg(any(stm32h5, stm32h7, rcc_f2, rcc_f4, rcc_f410, rcc_f7, rcc_l4))]
+    #[cfg(any(stm32h5, stm32h7, stm32f2, stm32f4, stm32f7, rcc_l4, stm32g4))]
     pub pll1_q: Option<Hertz>,
     #[cfg(any(stm32h5, stm32h7))]
     pub pll2_p: Option<Hertz>,
@@ -167,7 +168,7 @@ pub struct Clocks {
 
     #[cfg(any(stm32h5, stm32h7, rcc_l4, rcc_c0))]
     pub lse: Option<Hertz>,
-    #[cfg(any(stm32h5, stm32h7))]
+    #[cfg(any(stm32h5, stm32h7, stm32g4))]
     pub hse: Option<Hertz>,
 
     #[cfg(stm32h5)]

tests/stm32/Cargo.toml

@@ -10,14 +10,14 @@ stm32c031c6 = ["embassy-stm32/stm32c031c6", "cm0", "not-gpdma"]
 stm32f103c8 = ["embassy-stm32/stm32f103c8", "not-gpdma"]
 stm32f207zg = ["embassy-stm32/stm32f207zg", "chrono", "not-gpdma", "eth", "rng"]
 stm32f303ze = ["embassy-stm32/stm32f303ze", "chrono", "not-gpdma"]
-stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "eth", "stop", "can", "not-gpdma", "dac-adc-pin", "rng"]
-stm32f446re = ["embassy-stm32/stm32f446re", "chrono", "stop", "can", "not-gpdma", "dac-adc-pin", "sdmmc"]
+stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "eth", "stop", "can", "not-gpdma", "dac", "rng"]
+stm32f446re = ["embassy-stm32/stm32f446re", "chrono", "stop", "can", "not-gpdma", "dac", "sdmmc"]
 stm32f767zi = ["embassy-stm32/stm32f767zi", "chrono", "not-gpdma", "eth", "rng"]
-stm32g071rb = ["embassy-stm32/stm32g071rb", "cm0", "not-gpdma", "dac-adc-pin"]
+stm32g071rb = ["embassy-stm32/stm32g071rb", "cm0", "not-gpdma", "dac"]
 stm32g491re = ["embassy-stm32/stm32g491re", "chrono", "stop", "not-gpdma", "rng"]
 stm32h563zi = ["embassy-stm32/stm32h563zi", "chrono", "eth", "rng"]
 stm32h753zi = ["embassy-stm32/stm32h753zi", "chrono", "not-gpdma", "eth", "rng"]
-stm32h755zi = ["embassy-stm32/stm32h755zi-cm7", "chrono", "not-gpdma", "eth", "dac-adc-pin", "rng"]
+stm32h755zi = ["embassy-stm32/stm32h755zi-cm7", "chrono", "not-gpdma", "eth", "dac", "rng"]
 stm32h7a3zi = ["embassy-stm32/stm32h7a3zi", "not-gpdma", "rng"]
 stm32l073rz = ["embassy-stm32/stm32l073rz", "cm0", "not-gpdma", "rng"]
 stm32l152re = ["embassy-stm32/stm32l152re", "chrono", "not-gpdma"]
@@ -41,7 +41,7 @@ ble = ["dep:embassy-stm32-wpan", "embassy-stm32-wpan/ble"]
 mac = ["dep:embassy-stm32-wpan", "embassy-stm32-wpan/mac"]
 embassy-stm32-wpan = []
 not-gpdma = []
-dac-adc-pin = []
+dac = []
 
 cm0 = ["portable-atomic/unsafe-assume-single-core"]
 
@@ -84,7 +84,12 @@ required-features = [ "can",]
 [[bin]]
 name = "dac"
 path = "src/bin/dac.rs"
-required-features = [ "dac-adc-pin",]
+required-features = [ "dac",]
+
+[[bin]]
+name = "dac_l1"
+path = "src/bin/dac_l1.rs"
+required-features = [ "stm32l152re",]
 
 [[bin]]
 name = "eth"

tests/stm32/src/bin/dac.rs

@@ -1,7 +1,7 @@
 #![no_std]
 #![no_main]
 
-// required-features: dac-adc-pin
+// required-features: dac
 
 #[path = "../common.rs"]
 mod common;
@@ -22,12 +22,13 @@ async fn main(_spawner: Spawner) {
     // Initialize the board and obtain a Peripherals instance
     let p: embassy_stm32::Peripherals = embassy_stm32::init(config());
 
+    let adc = peri!(p, ADC);
     let dac = peri!(p, DAC);
     let dac_pin = peri!(p, DAC_PIN);
     let mut adc_pin = unsafe { core::ptr::read(&dac_pin) };
 
     let mut dac = DacCh1::new(dac, NoDma, dac_pin);
-    let mut adc = Adc::new(p.ADC1, &mut Delay);
+    let mut adc = Adc::new(adc, &mut Delay);
 
     #[cfg(feature = "stm32h755zi")]
     let normalization_factor = 256;

tests/stm32/src/bin/dac_l1.rs

@@ -0,0 +1,86 @@
+#![no_std]
+#![no_main]
+
+// required-features: stm32l152re
+
+#[path = "../common.rs"]
+mod common;
+use core::f32::consts::PI;
+
+use common::*;
+use defmt::assert;
+use embassy_executor::Spawner;
+use embassy_stm32::adc::Adc;
+use embassy_stm32::dac::{DacCh1, Value};
+use embassy_stm32::dma::NoDma;
+use embassy_stm32::{bind_interrupts, peripherals};
+use embassy_time::Timer;
+use micromath::F32Ext;
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    ADC1 => embassy_stm32::adc::InterruptHandler<peripherals::ADC>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    // Initialize the board and obtain a Peripherals instance
+    let p: embassy_stm32::Peripherals = embassy_stm32::init(config());
+
+    let adc = peri!(p, ADC);
+    let dac = peri!(p, DAC);
+    let dac_pin = peri!(p, DAC_PIN);
+    let mut adc_pin = unsafe { core::ptr::read(&dac_pin) };
+
+    let mut dac = DacCh1::new(dac, NoDma, dac_pin);
+    let mut adc = Adc::new(adc, Irqs);
+
+    #[cfg(feature = "stm32h755zi")]
+    let normalization_factor = 256;
+    #[cfg(any(
+        feature = "stm32f429zi",
+        feature = "stm32f446re",
+        feature = "stm32g071rb",
+        feature = "stm32l152re",
+    ))]
+    let normalization_factor: i32 = 16;
+
+    dac.set(Value::Bit8(0));
+    // Now wait a little to obtain a stable value
+    Timer::after_millis(30).await;
+    let offset = adc.read(&mut adc_pin).await;
+
+    for v in 0..=255 {
+        // First set the DAC output value
+        let dac_output_val = to_sine_wave(v);
+        dac.set(Value::Bit8(dac_output_val));
+
+        // Now wait a little to obtain a stable value
+        Timer::after_millis(30).await;
+
+        // Need to steal the peripherals here because PA4 is obviously in use already
+        let measured = adc.read(&mut unsafe { embassy_stm32::Peripherals::steal() }.PA4).await;
+        // Calibrate and normalize the measurement to get close to the dac_output_val
+        let measured_normalized = ((measured as i32 - offset as i32) / normalization_factor) as i16;
+
+        info!("value / measured: {} / {}", dac_output_val, measured_normalized);
+
+        // The deviations are quite enormous but that does not matter since this is only a quick test
+        assert!((dac_output_val as i16 - measured_normalized).abs() < 15);
+    }
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}
+
+fn to_sine_wave(v: u8) -> u8 {
+    if v >= 128 {
+        // top half
+        let r = PI * ((v - 128) as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    } else {
+        // bottom half
+        let r = PI + PI * (v as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    }
+}

tests/stm32/src/common.rs

@@ -101,14 +101,14 @@ define_peris!(
 define_peris!(
     UART = USART1, UART_TX = PC4, UART_RX = PC5, UART_TX_DMA = DMA1_CH1, UART_RX_DMA = DMA1_CH2,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH1, SPI_RX_DMA = DMA1_CH2,
-    DAC = DAC1, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC1, DAC_PIN = PA4,
     @irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
 );
 #[cfg(feature = "stm32f429zi")]
 define_peris!(
     UART = USART6, UART_TX = PG14, UART_RX = PG9, UART_TX_DMA = DMA2_CH6, UART_RX_DMA = DMA2_CH1,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA2_CH3, SPI_RX_DMA = DMA2_CH2,
-    DAC = DAC, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC, DAC_PIN = PA4,
     CAN = CAN1, CAN_RX = PD0, CAN_TX = PD1,
     @irq UART = {USART6 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART6>;},
 );
@@ -116,7 +116,7 @@ define_peris!(
 define_peris!(
     UART = USART1, UART_TX = PA9, UART_RX = PA10, UART_TX_DMA = DMA2_CH7, UART_RX_DMA = DMA2_CH5,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA2_CH3, SPI_RX_DMA = DMA2_CH2,
-    DAC = DAC, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC, DAC_PIN = PA4,
     CAN = CAN1, CAN_RX = PA11, CAN_TX = PA12,
     @irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
 );
@@ -130,7 +130,7 @@ define_peris!(
 define_peris!(
     UART = USART1, UART_TX = PB6, UART_RX = PB7, UART_TX_DMA = DMA1_CH0, UART_RX_DMA = DMA1_CH1,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PB5, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH0, SPI_RX_DMA = DMA1_CH1,
-    DAC = DAC1, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC1, DAC_PIN = PA4,
     @irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
 );
 #[cfg(feature = "stm32h7a3zi")]
@@ -191,6 +191,7 @@ define_peris!(
 define_peris!(
     UART = USART3, UART_TX = PB10, UART_RX = PB11, UART_TX_DMA = DMA1_CH2, UART_RX_DMA = DMA1_CH3,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH3, SPI_RX_DMA = DMA1_CH2,
+    ADC = ADC, DAC = DAC, DAC_PIN = PA4,
     @irq UART = {USART3 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART3>;},
 );
 #[cfg(feature = "stm32l552ze")]