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stm32/rcc: refactor and unify f4 into f7.

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This commit is contained in:
Dario Nieuwenhuis
2023-10-18 04:31:53 +02:00
parent 67010d123c
commit f20f170b1f
10 changed files with 168 additions and 425 deletions
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4
embassy-stm32/Cargo.toml
View File

@@ -58,7 +58,7 @@ rand_core = "0.6.3"
sdio-host = "0.5.0" sdio-host = "0.5.0"
embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true } embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
critical-section = "1.1" critical-section = "1.1"
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-6f7449303bf8af60a63704d35df9af46006c6148" } stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-5b04234fbe61ea875f1a904cd5f68795daaeb526" }
vcell = "0.1.3" vcell = "0.1.3"
bxcan = "0.7.0" bxcan = "0.7.0"
nb = "1.0.0" nb = "1.0.0"
@@ -76,7 +76,7 @@ critical-section = { version = "1.1", features = ["std"] }
[build-dependencies] [build-dependencies]
proc-macro2 = "1.0.36" proc-macro2 = "1.0.36"
quote = "1.0.15" quote = "1.0.15"
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-6f7449303bf8af60a63704d35df9af46006c6148", default-features = false, features = ["metadata"]} stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-5b04234fbe61ea875f1a904cd5f68795daaeb526", default-features = false, features = ["metadata"]}
[features] [features]

400
embassy-stm32/src/rcc/f4.rs
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@@ -1,400 +0,0 @@
use crate::pac::rcc::vals::{Hpre, Pllm, Plln, Pllq, Pllr, Ppre, Sw};
use crate::pac::{FLASH, PWR, RCC};
use crate::rcc::{set_freqs, Clocks};
use crate::time::Hertz;
/// HSI speed
pub const HSI_FREQ: Hertz = Hertz(16_000_000);
/// Clocks configuration
#[non_exhaustive]
#[derive(Default)]
pub struct Config {
pub hse: Option<Hertz>,
pub bypass_hse: bool,
pub hclk: Option<Hertz>,
pub sys_ck: Option<Hertz>,
pub pclk1: Option<Hertz>,
pub pclk2: Option<Hertz>,
#[cfg(not(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423, stm32f446)))]
pub plli2s: Option<Hertz>,
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
pub pllsai: Option<Hertz>,
pub pll48: bool,
pub ls: super::LsConfig,
}
#[cfg(stm32f410)]
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))]
fn setup_i2s_pll(_vco_in: u32, _plli2s: Option<u32>) -> Option<u32> {
None
}
#[cfg(not(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423)))]
fn calculate_sai_i2s_pll_values(vco_in: u32, max_div: u32, target: Option<u32>) -> Option<(u32, u32, u32)> {
let min_div = 2;
let target = match target {
Some(target) => target,
None => return None,
};
// We loop through the possible divider values to find the best configuration. Looping
// through all possible "N" values would result in more iterations.
let (n, outdiv, output, _error) = (min_div..=max_div)
.filter_map(|outdiv| {
let target_vco_out = match target.checked_mul(outdiv) {
Some(x) => x,
None => return None,
};
let n = (target_vco_out + (vco_in >> 1)) / vco_in;
let vco_out = vco_in * n;
if !(100_000_000..=432_000_000).contains(&vco_out) {
return None;
}
let output = vco_out / outdiv;
let error = (output as i32 - target as i32).unsigned_abs();
Some((n, outdiv, output, error))
})
.min_by_key(|(_, _, _, error)| *error)?;
Some((n, outdiv, output))
}
#[cfg(not(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423, stm32f446)))]
fn setup_i2s_pll(vco_in: u32, plli2s: Option<u32>) -> Option<u32> {
let (n, outdiv, output) = calculate_sai_i2s_pll_values(vco_in, 7, plli2s)?;
RCC.plli2scfgr().modify(|w| {
w.set_plli2sn(n as u16);
w.set_plli2sr(outdiv as u8);
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
w.set_plli2sq(outdiv as u8); //set sai divider same as i2s
});
Some(output)
}
#[cfg(not(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479)))]
fn setup_sai_pll(_vco_in: u32, _pllsai: Option<u32>) -> Option<u32> {
None
}
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
fn setup_sai_pll(vco_in: u32, pllsai: Option<u32>) -> Option<u32> {
let (n, outdiv, output) = calculate_sai_i2s_pll_values(vco_in, 15, pllsai)?;
RCC.pllsaicfgr().modify(|w| {
w.set_pllsain(n as u16);
w.set_pllsaiq(outdiv as u8);
});
Some(output)
}
fn setup_pll(
pllsrcclk: u32,
use_hse: bool,
pllsysclk: Option<u32>,
plli2s: Option<u32>,
pllsai: Option<u32>,
pll48clk: bool,
) -> PllResults {
use crate::pac::rcc::vals::{Pllp, Pllsrc};
let sysclk = pllsysclk.unwrap_or(pllsrcclk);
if pllsysclk.is_none() && !pll48clk {
RCC.pllcfgr().modify(|w| w.set_pllsrc(Pllsrc::from_bits(use_hse as u8)));
return PllResults {
use_pll: false,
pllsysclk: None,
pll48clk: None,
plli2sclk: None,
pllsaiclk: None,
};
}
// Input divisor from PLL source clock, must result to frequency in
// the range from 1 to 2 MHz
let pllm_min = (pllsrcclk + 1_999_999) / 2_000_000;
let pllm_max = pllsrcclk / 1_000_000;
// Sysclk output divisor must be one of 2, 4, 6 or 8
let sysclk_div = core::cmp::min(8, (432_000_000 / sysclk) & !1);
let target_freq = if pll48clk { 48_000_000 } else { sysclk * sysclk_div };
// Find the lowest pllm value that minimize the difference between
// target frequency and the real vco_out frequency.
let pllm = unwrap!((pllm_min..=pllm_max).min_by_key(|pllm| {
let vco_in = pllsrcclk / pllm;
let plln = target_freq / vco_in;
target_freq - vco_in * plln
}));
let vco_in = pllsrcclk / pllm;
assert!((1_000_000..=2_000_000).contains(&vco_in));
// Main scaler, must result in >= 100MHz (>= 192MHz for F401)
// and <= 432MHz, min 50, max 432
let plln = if pll48clk {
// try the different valid pllq according to the valid
// main scaller values, and take the best
let pllq = unwrap!((4..=9).min_by_key(|pllq| {
let plln = 48_000_000 * pllq / vco_in;
let pll48_diff = 48_000_000 - vco_in * plln / pllq;
let sysclk_diff = (sysclk as i32 - (vco_in * plln / sysclk_div) as i32).abs();
(pll48_diff, sysclk_diff)
}));
48_000_000 * pllq / vco_in
} else {
sysclk * sysclk_div / vco_in
};
let pllp = (sysclk_div / 2) - 1;
let pllq = (vco_in * plln + 47_999_999) / 48_000_000;
let real_pll48clk = vco_in * plln / pllq;
RCC.pllcfgr().modify(|w| {
w.set_pllm(Pllm::from_bits(pllm as u8));
w.set_plln(Plln::from_bits(plln as u16));
w.set_pllp(Pllp::from_bits(pllp as u8));
w.set_pllq(Pllq::from_bits(pllq as u8));
w.set_pllsrc(Pllsrc::from_bits(use_hse as u8));
w.set_pllr(Pllr::from_bits(0));
});
let real_pllsysclk = vco_in * plln / sysclk_div;
PllResults {
use_pll: true,
pllsysclk: Some(real_pllsysclk),
pll48clk: if pll48clk { Some(real_pll48clk) } else { None },
plli2sclk: setup_i2s_pll(vco_in, plli2s),
pllsaiclk: setup_sai_pll(vco_in, pllsai),
}
}
fn flash_setup(sysclk: u32) {
use crate::pac::flash::vals::Latency;
// Be conservative with voltage ranges
const FLASH_LATENCY_STEP: u32 = 30_000_000;
critical_section::with(|_| {
FLASH
.acr()
.modify(|w| w.set_latency(Latency::from_bits(((sysclk - 1) / FLASH_LATENCY_STEP) as u8)));
});
}
pub(crate) unsafe fn init(config: Config) {
let pllsrcclk = config.hse.map(|hse| hse.0).unwrap_or(HSI_FREQ.0);
let sysclk = config.sys_ck.map(|sys| sys.0).unwrap_or(pllsrcclk);
let sysclk_on_pll = sysclk != pllsrcclk;
let plls = setup_pll(
pllsrcclk,
config.hse.is_some(),
if sysclk_on_pll { Some(sysclk) } else { None },
#[cfg(not(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423, stm32f446)))]
config.plli2s.map(|i2s| i2s.0),
#[cfg(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423, stm32f446))]
None,
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
config.pllsai.map(|sai| sai.0),
#[cfg(not(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479)))]
None,
config.pll48,
);
if config.pll48 {
let freq = unwrap!(plls.pll48clk);
assert!((max::PLL_48_CLK as i32 - freq as i32).abs() <= max::PLL_48_TOLERANCE as i32);
}
let sysclk = if sysclk_on_pll { unwrap!(plls.pllsysclk) } else { sysclk };
// AHB prescaler
let hclk = config.hclk.map(|h| h.0).unwrap_or(sysclk);
let (hpre_bits, hpre_div) = match (sysclk + hclk - 1) / hclk {
0 => unreachable!(),
1 => (Hpre::DIV1, 1),
2 => (Hpre::DIV2, 2),
3..=5 => (Hpre::DIV4, 4),
6..=11 => (Hpre::DIV8, 8),
12..=39 => (Hpre::DIV16, 16),
40..=95 => (Hpre::DIV64, 64),
96..=191 => (Hpre::DIV128, 128),
192..=383 => (Hpre::DIV256, 256),
_ => (Hpre::DIV512, 512),
};
// Calculate real AHB clock
let hclk = sysclk / hpre_div;
let pclk1 = config
.pclk1
.map(|p| p.0)
.unwrap_or_else(|| core::cmp::min(max::PCLK1_MAX, hclk));
let (ppre1_bits, ppre1) = match (hclk + pclk1 - 1) / pclk1 {
0 => unreachable!(),
1 => (0b000, 1),
2 => (0b100, 2),
3..=5 => (0b101, 4),
6..=11 => (0b110, 8),
_ => (0b111, 16),
};
let timer_mul1 = if ppre1 == 1 { 1 } else { 2 };
// Calculate real APB1 clock
let pclk1 = hclk / ppre1;
assert!(pclk1 <= max::PCLK1_MAX);
let pclk2 = config
.pclk2
.map(|p| p.0)
.unwrap_or_else(|| core::cmp::min(max::PCLK2_MAX, hclk));
let (ppre2_bits, ppre2) = match (hclk + pclk2 - 1) / pclk2 {
0 => unreachable!(),
1 => (0b000, 1),
2 => (0b100, 2),
3..=5 => (0b101, 4),
6..=11 => (0b110, 8),
_ => (0b111, 16),
};
let timer_mul2 = if ppre2 == 1 { 1 } else { 2 };
// Calculate real APB2 clock
let pclk2 = hclk / ppre2;
assert!(pclk2 <= max::PCLK2_MAX);
flash_setup(sysclk);
if config.hse.is_some() {
RCC.cr().modify(|w| {
w.set_hsebyp(config.bypass_hse);
w.set_hseon(true);
});
while !RCC.cr().read().hserdy() {}
}
if plls.use_pll {
RCC.cr().modify(|w| w.set_pllon(true));
if hclk > max::HCLK_OVERDRIVE_FREQUENCY {
PWR.cr1().modify(|w| w.set_oden(true));
while !PWR.csr1().read().odrdy() {}
PWR.cr1().modify(|w| w.set_odswen(true));
while !PWR.csr1().read().odswrdy() {}
}
while !RCC.cr().read().pllrdy() {}
}
#[cfg(not(stm32f410))]
if plls.plli2sclk.is_some() {
RCC.cr().modify(|w| w.set_plli2son(true));
while !RCC.cr().read().plli2srdy() {}
}
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
if plls.pllsaiclk.is_some() {
RCC.cr().modify(|w| w.set_pllsaion(true));
while !RCC.cr().read().pllsairdy() {}
}
RCC.cfgr().modify(|w| {
w.set_ppre2(Ppre::from_bits(ppre2_bits));
w.set_ppre1(Ppre::from_bits(ppre1_bits));
w.set_hpre(hpre_bits);
});
// Wait for the new prescalers to kick in
// "The clocks are divided with the new prescaler factor from 1 to 16 AHB cycles after write"
cortex_m::asm::delay(16);
RCC.cfgr().modify(|w| {
w.set_sw(if sysclk_on_pll {
Sw::PLL1_P
} else if config.hse.is_some() {
Sw::HSE
} else {
Sw::HSI
})
});
let rtc = config.ls.init();
set_freqs(Clocks {
sys: Hertz(sysclk),
pclk1: Hertz(pclk1),
pclk2: Hertz(pclk2),
pclk1_tim: Hertz(pclk1 * timer_mul1),
pclk2_tim: Hertz(pclk2 * timer_mul2),
hclk1: Hertz(hclk),
hclk2: Hertz(hclk),
hclk3: Hertz(hclk),
pll1_q: plls.pll48clk.map(Hertz),
#[cfg(not(stm32f410))]
plli2s1_q: plls.plli2sclk.map(Hertz),
#[cfg(not(stm32f410))]
plli2s1_r: None,
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
pllsai1_q: plls.pllsaiclk.map(Hertz),
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
pllsai1_r: None,
rtc,
});
}
struct PllResults {
use_pll: bool,
pllsysclk: Option<u32>,
pll48clk: Option<u32>,
#[allow(dead_code)]
plli2sclk: Option<u32>,
#[allow(dead_code)]
pllsaiclk: Option<u32>,
}
mod max {
#[cfg(stm32f401)]
pub(crate) const SYSCLK_MAX: u32 = 84_000_000;
#[cfg(any(stm32f405, stm32f407, stm32f415, stm32f417,))]
pub(crate) const SYSCLK_MAX: u32 = 168_000_000;
#[cfg(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423,))]
pub(crate) const SYSCLK_MAX: u32 = 100_000_000;
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479,))]
pub(crate) const SYSCLK_MAX: u32 = 180_000_000;
pub(crate) const HCLK_OVERDRIVE_FREQUENCY: u32 = 168_000_000;
pub(crate) const PCLK1_MAX: u32 = PCLK2_MAX / 2;
#[cfg(any(stm32f401, stm32f410, stm32f411, stm32f412, stm32f413, stm32f423,))]
pub(crate) const PCLK2_MAX: u32 = SYSCLK_MAX;
#[cfg(not(any(stm32f401, stm32f410, stm32f411, stm32f412, stm32f413, stm32f423,)))]
pub(crate) const PCLK2_MAX: u32 = SYSCLK_MAX / 2;
pub(crate) const PLL_48_CLK: u32 = 48_000_000;
pub(crate) const PLL_48_TOLERANCE: u32 = 120_000;
}

67
embassy-stm32/src/rcc/f7.rs → embassy-stm32/src/rcc/f4f7.rs
View File

@@ -6,6 +6,20 @@ use crate::pac::{FLASH, PWR, RCC};
use crate::rcc::{set_freqs, Clocks}; use crate::rcc::{set_freqs, Clocks};
use crate::time::Hertz; use crate::time::Hertz;
// TODO: on some F4s, PLLM is shared between all PLLs. Enforce that.
// TODO: on some F4s, add support for plli2s_src
//
// plli2s plli2s_m plli2s_src pllsai pllsai_m
// f401 y shared
// f410
// f411 y individual
// f412 y individual y
// f4[12]3 y individual y
// f446 y individual y individual
// f4[67]9 y shared y shared
// f4[23][79] y shared y shared
// f4[01][57] y shared
/// HSI speed /// HSI speed
pub const HSI_FREQ: Hertz = Hertz(16_000_000); pub const HSI_FREQ: Hertz = Hertz(16_000_000);
@@ -51,7 +65,9 @@ pub struct Config {
pub pll_src: PllSource, pub pll_src: PllSource,
pub pll: Option<Pll>, pub pll: Option<Pll>,
#[cfg(any(all(stm32f4, not(stm32f410)), stm32f7))]
pub plli2s: Option<Pll>, pub plli2s: Option<Pll>,
#[cfg(any(stm32f446, stm32f427, stm32f437, stm32f4x9, stm32f7))]
pub pllsai: Option<Pll>, pub pllsai: Option<Pll>,
pub ahb_pre: AHBPrescaler, pub ahb_pre: AHBPrescaler,
@@ -69,7 +85,9 @@ impl Default for Config {
sys: Sysclk::HSI, sys: Sysclk::HSI,
pll_src: PllSource::HSI, pll_src: PllSource::HSI,
pll: None, pll: None,
#[cfg(any(all(stm32f4, not(stm32f410)), stm32f7))]
plli2s: None, plli2s: None,
#[cfg(any(stm32f446, stm32f427, stm32f437, stm32f4x9, stm32f7))]
pllsai: None, pllsai: None,
ahb_pre: AHBPrescaler::DIV1, ahb_pre: AHBPrescaler::DIV1,
@@ -128,7 +146,9 @@ pub(crate) unsafe fn init(config: Config) {
source: config.pll_src, source: config.pll_src,
}; };
let pll = init_pll(PllInstance::Pll, config.pll, &pll_input); let pll = init_pll(PllInstance::Pll, config.pll, &pll_input);
#[cfg(any(all(stm32f4, not(stm32f410)), stm32f7))]
let _plli2s = init_pll(PllInstance::Plli2s, config.plli2s, &pll_input); let _plli2s = init_pll(PllInstance::Plli2s, config.plli2s, &pll_input);
#[cfg(any(stm32f446, stm32f427, stm32f437, stm32f4x9, stm32f7))]
let _pllsai = init_pll(PllInstance::Pllsai, config.pllsai, &pll_input); let _pllsai = init_pll(PllInstance::Pllsai, config.pllsai, &pll_input);
// Configure sysclk // Configure sysclk
@@ -171,6 +191,15 @@ pub(crate) unsafe fn init(config: Config) {
pclk2_tim, pclk2_tim,
rtc, rtc,
pll1_q: pll.q, pll1_q: pll.q,
#[cfg(all(rcc_f4, not(stm32f410)))]
plli2s1_q: _plli2s.q,
#[cfg(all(rcc_f4, not(stm32f410)))]
plli2s1_r: _plli2s.r,
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
pllsai1_q: _pllsai.q,
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
pllsai1_r: _pllsai.r,
}); });
} }
@@ -191,7 +220,9 @@ struct PllOutput {
#[derive(PartialEq, Eq, Clone, Copy)] #[derive(PartialEq, Eq, Clone, Copy)]
enum PllInstance { enum PllInstance {
Pll, Pll,
#[cfg(any(all(stm32f4, not(stm32f410)), stm32f7))]
Plli2s, Plli2s,
#[cfg(any(stm32f446, stm32f427, stm32f437, stm32f4x9, stm32f7))]
Pllsai, Pllsai,
} }
@@ -201,10 +232,12 @@ fn pll_enable(instance: PllInstance, enabled: bool) {
RCC.cr().modify(|w| w.set_pllon(enabled)); RCC.cr().modify(|w| w.set_pllon(enabled));
while RCC.cr().read().pllrdy() != enabled {} while RCC.cr().read().pllrdy() != enabled {}
} }
#[cfg(any(all(stm32f4, not(stm32f410)), stm32f7))]
PllInstance::Plli2s => { PllInstance::Plli2s => {
RCC.cr().modify(|w| w.set_plli2son(enabled)); RCC.cr().modify(|w| w.set_plli2son(enabled));
while RCC.cr().read().plli2srdy() != enabled {} while RCC.cr().read().plli2srdy() != enabled {}
} }
#[cfg(any(stm32f446, stm32f427, stm32f437, stm32f4x9, stm32f7))]
PllInstance::Pllsai => { PllInstance::Pllsai => {
RCC.cr().modify(|w| w.set_pllsaion(enabled)); RCC.cr().modify(|w| w.set_pllsaion(enabled));
while RCC.cr().read().pllsairdy() != enabled {} while RCC.cr().read().pllsairdy() != enabled {}
@@ -255,9 +288,11 @@ fn init_pll(instance: PllInstance, config: Option<Pll>, input: &PllInput) -> Pll
w.set_pllsrc(input.source); w.set_pllsrc(input.source);
write_fields!(w); write_fields!(w);
}), }),
#[cfg(any(all(stm32f4, not(stm32f410)), stm32f7))]
PllInstance::Plli2s => RCC.plli2scfgr().write(|w| { PllInstance::Plli2s => RCC.plli2scfgr().write(|w| {
write_fields!(w); write_fields!(w);
}), }),
#[cfg(any(stm32f446, stm32f427, stm32f437, stm32f4x9, stm32f7))]
PllInstance::Pllsai => RCC.pllsaicfgr().write(|w| { PllInstance::Pllsai => RCC.pllsaicfgr().write(|w| {
write_fields!(w); write_fields!(w);
}), }),
@@ -294,6 +329,7 @@ where
(pclk, pclk_tim) (pclk, pclk_tim)
} }
#[cfg(stm32f7)]
mod max { mod max {
use core::ops::RangeInclusive; use core::ops::RangeInclusive;
@@ -310,3 +346,34 @@ mod max {
pub(crate) const PLL_IN: RangeInclusive<Hertz> = Hertz(1_000_000)..=Hertz(2_100_000); pub(crate) const PLL_IN: RangeInclusive<Hertz> = Hertz(1_000_000)..=Hertz(2_100_000);
pub(crate) const PLL_VCO: RangeInclusive<Hertz> = Hertz(100_000_000)..=Hertz(432_000_000); pub(crate) const PLL_VCO: RangeInclusive<Hertz> = Hertz(100_000_000)..=Hertz(432_000_000);
} }
#[cfg(stm32f4)]
mod max {
use core::ops::RangeInclusive;
use crate::time::Hertz;
pub(crate) const HSE_OSC: RangeInclusive<Hertz> = Hertz(4_000_000)..=Hertz(26_000_000);
pub(crate) const HSE_BYP: RangeInclusive<Hertz> = Hertz(1_000_000)..=Hertz(50_000_000);
#[cfg(stm32f401)]
pub(crate) const SYSCLK: RangeInclusive<Hertz> = Hertz(0)..=Hertz(84_000_000);
#[cfg(any(stm32f405, stm32f407, stm32f415, stm32f417,))]
pub(crate) const SYSCLK: RangeInclusive<Hertz> = Hertz(0)..=Hertz(168_000_000);
#[cfg(any(stm32f410, stm32f411, stm32f412, stm32f413, stm32f423,))]
pub(crate) const SYSCLK: RangeInclusive<Hertz> = Hertz(0)..=Hertz(100_000_000);
#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479,))]
pub(crate) const SYSCLK: RangeInclusive<Hertz> = Hertz(0)..=Hertz(180_000_000);
pub(crate) const HCLK: RangeInclusive<Hertz> = Hertz(0)..=Hertz(SYSCLK.end().0);
pub(crate) const PCLK1: RangeInclusive<Hertz> = Hertz(0)..=Hertz(PCLK2.end().0 / 2);
#[cfg(any(stm32f401, stm32f410, stm32f411, stm32f412, stm32f413, stm32f423,))]
pub(crate) const PCLK2: RangeInclusive<Hertz> = Hertz(0)..=Hertz(HCLK.end().0);
#[cfg(not(any(stm32f401, stm32f410, stm32f411, stm32f412, stm32f413, stm32f423,)))]
pub(crate) const PCLK2: RangeInclusive<Hertz> = Hertz(0)..=Hertz(HCLK.end().0 / 2);
pub(crate) const PLL_IN: RangeInclusive<Hertz> = Hertz(1_000_000)..=Hertz(2_100_000);
pub(crate) const PLL_VCO: RangeInclusive<Hertz> = Hertz(100_000_000)..=Hertz(432_000_000);
}

3
embassy-stm32/src/rcc/mod.rs
View File

@@ -13,8 +13,7 @@ pub use mco::*;
#[cfg_attr(any(rcc_f1, rcc_f100, rcc_f1cl), path = "f1.rs")] #[cfg_attr(any(rcc_f1, rcc_f100, rcc_f1cl), path = "f1.rs")]
#[cfg_attr(rcc_f2, path = "f2.rs")] #[cfg_attr(rcc_f2, path = "f2.rs")]
#[cfg_attr(any(rcc_f3, rcc_f3_v2), path = "f3.rs")] #[cfg_attr(any(rcc_f3, rcc_f3_v2), path = "f3.rs")]
#[cfg_attr(any(rcc_f4, rcc_f410), path = "f4.rs")] #[cfg_attr(any(rcc_f4, rcc_f410, rcc_f7), path = "f4f7.rs")]
#[cfg_attr(rcc_f7, path = "f7.rs")]
#[cfg_attr(rcc_c0, path = "c0.rs")] #[cfg_attr(rcc_c0, path = "c0.rs")]
#[cfg_attr(rcc_g0, path = "g0.rs")] #[cfg_attr(rcc_g0, path = "g0.rs")]
#[cfg_attr(rcc_g4, path = "g4.rs")] #[cfg_attr(rcc_g4, path = "g4.rs")]

22
examples/stm32f4/src/bin/eth.rs
View File

@@ -10,7 +10,7 @@ use embassy_stm32::eth::generic_smi::GenericSMI;
use embassy_stm32::eth::{Ethernet, PacketQueue}; use embassy_stm32::eth::{Ethernet, PacketQueue};
use embassy_stm32::peripherals::ETH; use embassy_stm32::peripherals::ETH;
use embassy_stm32::rng::Rng; use embassy_stm32::rng::Rng;
use embassy_stm32::time::mhz; use embassy_stm32::time::Hertz;
use embassy_stm32::{bind_interrupts, eth, peripherals, rng, Config}; use embassy_stm32::{bind_interrupts, eth, peripherals, rng, Config};
use embassy_time::Timer; use embassy_time::Timer;
use embedded_io_async::Write; use embedded_io_async::Write;
@@ -32,7 +32,25 @@ async fn net_task(stack: &'static Stack<Device>) -> ! {
#[embassy_executor::main] #[embassy_executor::main]
async fn main(spawner: Spawner) -> ! { async fn main(spawner: Spawner) -> ! {
let mut config = Config::default(); let mut config = Config::default();
config.rcc.sys_ck = Some(mhz(200)); {
use embassy_stm32::rcc::*;
config.rcc.hse = Some(Hse {
freq: Hertz(8_000_000),
mode: HseMode::Bypass,
});
config.rcc.pll_src = PllSource::HSE;
config.rcc.pll = Some(Pll {
prediv: PllPreDiv::DIV4,
mul: PllMul::MUL180,
divp: Some(Pllp::DIV2), // 8mhz / 4 * 180 / 2 = 180Mhz.
divq: None,
divr: None,
});
config.rcc.ahb_pre = AHBPrescaler::DIV1;
config.rcc.apb1_pre = APBPrescaler::DIV4;
config.rcc.apb2_pre = APBPrescaler::DIV2;
config.rcc.sys = Sysclk::PLL1_P;
}
let p = embassy_stm32::init(config); let p = embassy_stm32::init(config);
info!("Hello World!"); info!("Hello World!");

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

@@ -4,15 +4,13 @@
use defmt::info; use defmt::info;
use embassy_executor::Spawner; use embassy_executor::Spawner;
use embassy_stm32::time::Hertz;
use embassy_stm32::Config; use embassy_stm32::Config;
use embassy_time::Timer; use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _}; use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::main] #[embassy_executor::main]
async fn main(_spawner: Spawner) -> ! { async fn main(_spawner: Spawner) -> ! {
let mut config = Config::default(); let config = Config::default();
config.rcc.sys_ck = Some(Hertz(84_000_000));
let _p = embassy_stm32::init(config); let _p = embassy_stm32::init(config);
loop { loop {

23
examples/stm32f4/src/bin/sdmmc.rs
View File

@@ -5,7 +5,7 @@
use defmt::*; use defmt::*;
use embassy_executor::Spawner; use embassy_executor::Spawner;
use embassy_stm32::sdmmc::{DataBlock, Sdmmc}; use embassy_stm32::sdmmc::{DataBlock, Sdmmc};
use embassy_stm32::time::mhz; use embassy_stm32::time::{mhz, Hertz};
use embassy_stm32::{bind_interrupts, peripherals, sdmmc, Config}; use embassy_stm32::{bind_interrupts, peripherals, sdmmc, Config};
use {defmt_rtt as _, panic_probe as _}; use {defmt_rtt as _, panic_probe as _};
@@ -20,8 +20,25 @@ bind_interrupts!(struct Irqs {
#[embassy_executor::main] #[embassy_executor::main]
async fn main(_spawner: Spawner) { async fn main(_spawner: Spawner) {
let mut config = Config::default(); let mut config = Config::default();
config.rcc.sys_ck = Some(mhz(48)); {
config.rcc.pll48 = true; use embassy_stm32::rcc::*;
config.rcc.hse = Some(Hse {
freq: Hertz(8_000_000),
mode: HseMode::Bypass,
});
config.rcc.pll_src = PllSource::HSE;
config.rcc.pll = Some(Pll {
prediv: PllPreDiv::DIV4,
mul: PllMul::MUL168,
divp: Some(Pllp::DIV2), // 8mhz / 4 * 168 / 2 = 168Mhz.
divq: Some(Pllq::DIV7), // 8mhz / 4 * 168 / 7 = 48Mhz.
divr: None,
});
config.rcc.ahb_pre = AHBPrescaler::DIV1;
config.rcc.apb1_pre = APBPrescaler::DIV4;
config.rcc.apb2_pre = APBPrescaler::DIV2;
config.rcc.sys = Sysclk::PLL1_P;
}
let p = embassy_stm32::init(config); let p = embassy_stm32::init(config);
info!("Hello World!"); info!("Hello World!");

24
examples/stm32f4/src/bin/usb_ethernet.rs
View File

@@ -7,7 +7,7 @@ use embassy_executor::Spawner;
use embassy_net::tcp::TcpSocket; use embassy_net::tcp::TcpSocket;
use embassy_net::{Stack, StackResources}; use embassy_net::{Stack, StackResources};
use embassy_stm32::rng::{self, Rng}; use embassy_stm32::rng::{self, Rng};
use embassy_stm32::time::mhz; use embassy_stm32::time::Hertz;
use embassy_stm32::usb_otg::Driver; use embassy_stm32::usb_otg::Driver;
use embassy_stm32::{bind_interrupts, peripherals, usb_otg, Config}; use embassy_stm32::{bind_interrupts, peripherals, usb_otg, Config};
use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState}; use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState};
@@ -46,9 +46,25 @@ async fn main(spawner: Spawner) {
info!("Hello World!"); info!("Hello World!");
let mut config = Config::default(); let mut config = Config::default();
config.rcc.pll48 = true; {
config.rcc.sys_ck = Some(mhz(48)); use embassy_stm32::rcc::*;
config.rcc.hse = Some(Hse {
freq: Hertz(8_000_000),
mode: HseMode::Bypass,
});
config.rcc.pll_src = PllSource::HSE;
config.rcc.pll = Some(Pll {
prediv: PllPreDiv::DIV4,
mul: PllMul::MUL168,
divp: Some(Pllp::DIV2), // 8mhz / 4 * 168 / 2 = 168Mhz.
divq: Some(Pllq::DIV7), // 8mhz / 4 * 168 / 7 = 48Mhz.
divr: None,
});
config.rcc.ahb_pre = AHBPrescaler::DIV1;
config.rcc.apb1_pre = APBPrescaler::DIV4;
config.rcc.apb2_pre = APBPrescaler::DIV2;
config.rcc.sys = Sysclk::PLL1_P;
}
let p = embassy_stm32::init(config); let p = embassy_stm32::init(config);
// Create the driver, from the HAL. // Create the driver, from the HAL.

24
examples/stm32f4/src/bin/usb_serial.rs
View File

@@ -4,7 +4,7 @@
use defmt::{panic, *}; use defmt::{panic, *};
use embassy_executor::Spawner; use embassy_executor::Spawner;
use embassy_stm32::time::mhz; use embassy_stm32::time::Hertz;
use embassy_stm32::usb_otg::{Driver, Instance}; use embassy_stm32::usb_otg::{Driver, Instance};
use embassy_stm32::{bind_interrupts, peripherals, usb_otg, Config}; use embassy_stm32::{bind_interrupts, peripherals, usb_otg, Config};
use embassy_usb::class::cdc_acm::{CdcAcmClass, State}; use embassy_usb::class::cdc_acm::{CdcAcmClass, State};
@@ -22,9 +22,25 @@ async fn main(_spawner: Spawner) {
info!("Hello World!"); info!("Hello World!");
let mut config = Config::default(); let mut config = Config::default();
config.rcc.pll48 = true; {
config.rcc.sys_ck = Some(mhz(48)); use embassy_stm32::rcc::*;
config.rcc.hse = Some(Hse {
freq: Hertz(8_000_000),
mode: HseMode::Bypass,
});
config.rcc.pll_src = PllSource::HSE;
config.rcc.pll = Some(Pll {
prediv: PllPreDiv::DIV4,
mul: PllMul::MUL168,
divp: Some(Pllp::DIV2), // 8mhz / 4 * 168 / 2 = 168Mhz.
divq: Some(Pllq::DIV7), // 8mhz / 4 * 168 / 7 = 48Mhz.
divr: None,
});
config.rcc.ahb_pre = AHBPrescaler::DIV1;
config.rcc.apb1_pre = APBPrescaler::DIV4;
config.rcc.apb2_pre = APBPrescaler::DIV2;
config.rcc.sys = Sysclk::PLL1_P;
}
let p = embassy_stm32::init(config); let p = embassy_stm32::init(config);
// Create the driver, from the HAL. // Create the driver, from the HAL.

22
tests/stm32/src/common.rs
View File

@@ -224,11 +224,23 @@ pub fn config() -> Config {
#[cfg(feature = "stm32f429zi")] #[cfg(feature = "stm32f429zi")]
{ {
// TODO: stm32f429zi can do up to 180mhz, but that makes tests fail. use embassy_stm32::rcc::*;
// perhaps we have some bug w.r.t overdrive. config.rcc.hse = Some(Hse {
config.rcc.sys_ck = Some(Hertz(168_000_000)); freq: Hertz(8_000_000),
config.rcc.pclk1 = Some(Hertz(42_000_000)); mode: HseMode::Bypass,
config.rcc.pclk2 = Some(Hertz(84_000_000)); });
config.rcc.pll_src = PllSource::HSE;
config.rcc.pll = Some(Pll {
prediv: PllPreDiv::DIV4,
mul: PllMul::MUL180,
divp: Some(Pllp::DIV2), // 8mhz / 4 * 180 / 2 = 180Mhz.
divq: None,
divr: None,
});
config.rcc.ahb_pre = AHBPrescaler::DIV1;
config.rcc.apb1_pre = APBPrescaler::DIV4;
config.rcc.apb2_pre = APBPrescaler::DIV2;
config.rcc.sys = Sysclk::PLL1_P;
} }
#[cfg(feature = "stm32f767zi")] #[cfg(feature = "stm32f767zi")]