Merge #437

437: Initial support for STM32F767ZI. r=Dirbaio a=matoushybl

This PR adds support for the STM32F767ZI, it adds examples and RCC setup.
It is greatly based on the F4 source code and the f7-hal.

This PR is based on the pending PR in stm32-data: https://github.com/embassy-rs/stm32-data/pull/92

I am looking forward to your feedback on improving it and adding support for more peripherals and devices in the F7 family.

Co-authored-by: Matous Hybl <hyblmatous@gmail.com>
Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>

.github/workflows/rust.yml

@@ -112,6 +112,8 @@ jobs:
             target: wasm32-unknown-unknown
           - package: examples/stm32f1
             target: thumbv7m-none-eabi
+          - package: examples/stm32f7
+            target: thumbv7em-none-eabihf
     steps:
       - uses: actions/checkout@v2
         with:

Cargo.example.toml

@@ -34,11 +34,17 @@ members = [
     #"embassy-stm32",
     #"stm32-metapac",
     # uncomment ONLY ONE example crate.
+    #"examples/stm32f0",
+    #"examples/stm32f1",
     #"examples/stm32f4",
+    #"examples/stm32f7",
+    #"examples/stm32g0",
     #"examples/stm32h7",
     #"examples/stm32l0",
+    #"examples/stm32l1",
     #"examples/stm32l4",
     #"examples/stm32wb55",
+    #"examples/stm32wl55",
 
     # rp2040
     #"embassy-rp",

embassy-stm32/Cargo.toml

@@ -378,6 +378,94 @@ stm32f479vg = [ "stm32-metapac/stm32f479vg" ]
 stm32f479vi = [ "stm32-metapac/stm32f479vi" ]
 stm32f479zg = [ "stm32-metapac/stm32f479zg" ]
 stm32f479zi = [ "stm32-metapac/stm32f479zi" ]
+stm32f722ic = [ "stm32-metapac/stm32f722ic" ]
+stm32f722ie = [ "stm32-metapac/stm32f722ie" ]
+stm32f722rc = [ "stm32-metapac/stm32f722rc" ]
+stm32f722re = [ "stm32-metapac/stm32f722re" ]
+stm32f722vc = [ "stm32-metapac/stm32f722vc" ]
+stm32f722ve = [ "stm32-metapac/stm32f722ve" ]
+stm32f722zc = [ "stm32-metapac/stm32f722zc" ]
+stm32f722ze = [ "stm32-metapac/stm32f722ze" ]
+stm32f723ic = [ "stm32-metapac/stm32f723ic" ]
+stm32f723ie = [ "stm32-metapac/stm32f723ie" ]
+stm32f723vc = [ "stm32-metapac/stm32f723vc" ]
+stm32f723ve = [ "stm32-metapac/stm32f723ve" ]
+stm32f723zc = [ "stm32-metapac/stm32f723zc" ]
+stm32f723ze = [ "stm32-metapac/stm32f723ze" ]
+stm32f730i8 = [ "stm32-metapac/stm32f730i8" ]
+stm32f730r8 = [ "stm32-metapac/stm32f730r8" ]
+stm32f730v8 = [ "stm32-metapac/stm32f730v8" ]
+stm32f730z8 = [ "stm32-metapac/stm32f730z8" ]
+stm32f732ie = [ "stm32-metapac/stm32f732ie" ]
+stm32f732re = [ "stm32-metapac/stm32f732re" ]
+stm32f732ve = [ "stm32-metapac/stm32f732ve" ]
+stm32f732ze = [ "stm32-metapac/stm32f732ze" ]
+stm32f733ie = [ "stm32-metapac/stm32f733ie" ]
+stm32f733ve = [ "stm32-metapac/stm32f733ve" ]
+stm32f733ze = [ "stm32-metapac/stm32f733ze" ]
+stm32f745ie = [ "stm32-metapac/stm32f745ie" ]
+stm32f745ig = [ "stm32-metapac/stm32f745ig" ]
+stm32f745ve = [ "stm32-metapac/stm32f745ve" ]
+stm32f745vg = [ "stm32-metapac/stm32f745vg" ]
+stm32f745ze = [ "stm32-metapac/stm32f745ze" ]
+stm32f745zg = [ "stm32-metapac/stm32f745zg" ]
+stm32f746be = [ "stm32-metapac/stm32f746be" ]
+stm32f746bg = [ "stm32-metapac/stm32f746bg" ]
+stm32f746ie = [ "stm32-metapac/stm32f746ie" ]
+stm32f746ig = [ "stm32-metapac/stm32f746ig" ]
+stm32f746ne = [ "stm32-metapac/stm32f746ne" ]
+stm32f746ng = [ "stm32-metapac/stm32f746ng" ]
+stm32f746ve = [ "stm32-metapac/stm32f746ve" ]
+stm32f746vg = [ "stm32-metapac/stm32f746vg" ]
+stm32f746ze = [ "stm32-metapac/stm32f746ze" ]
+stm32f746zg = [ "stm32-metapac/stm32f746zg" ]
+stm32f750n8 = [ "stm32-metapac/stm32f750n8" ]
+stm32f750v8 = [ "stm32-metapac/stm32f750v8" ]
+stm32f750z8 = [ "stm32-metapac/stm32f750z8" ]
+stm32f756bg = [ "stm32-metapac/stm32f756bg" ]
+stm32f756ig = [ "stm32-metapac/stm32f756ig" ]
+stm32f756ng = [ "stm32-metapac/stm32f756ng" ]
+stm32f756vg = [ "stm32-metapac/stm32f756vg" ]
+stm32f756zg = [ "stm32-metapac/stm32f756zg" ]
+stm32f765bg = [ "stm32-metapac/stm32f765bg" ]
+stm32f765bi = [ "stm32-metapac/stm32f765bi" ]
+stm32f765ig = [ "stm32-metapac/stm32f765ig" ]
+stm32f765ii = [ "stm32-metapac/stm32f765ii" ]
+stm32f765ng = [ "stm32-metapac/stm32f765ng" ]
+stm32f765ni = [ "stm32-metapac/stm32f765ni" ]
+stm32f765vg = [ "stm32-metapac/stm32f765vg" ]
+stm32f765vi = [ "stm32-metapac/stm32f765vi" ]
+stm32f765zg = [ "stm32-metapac/stm32f765zg" ]
+stm32f765zi = [ "stm32-metapac/stm32f765zi" ]
+stm32f767bg = [ "stm32-metapac/stm32f767bg" ]
+stm32f767bi = [ "stm32-metapac/stm32f767bi" ]
+stm32f767ig = [ "stm32-metapac/stm32f767ig" ]
+stm32f767ii = [ "stm32-metapac/stm32f767ii" ]
+stm32f767ng = [ "stm32-metapac/stm32f767ng" ]
+stm32f767ni = [ "stm32-metapac/stm32f767ni" ]
+stm32f767vg = [ "stm32-metapac/stm32f767vg" ]
+stm32f767vi = [ "stm32-metapac/stm32f767vi" ]
+stm32f767zg = [ "stm32-metapac/stm32f767zg" ]
+stm32f767zi = [ "stm32-metapac/stm32f767zi" ]
+stm32f768ai = [ "stm32-metapac/stm32f768ai" ]
+stm32f769ag = [ "stm32-metapac/stm32f769ag" ]
+stm32f769ai = [ "stm32-metapac/stm32f769ai" ]
+stm32f769bg = [ "stm32-metapac/stm32f769bg" ]
+stm32f769bi = [ "stm32-metapac/stm32f769bi" ]
+stm32f769ig = [ "stm32-metapac/stm32f769ig" ]
+stm32f769ii = [ "stm32-metapac/stm32f769ii" ]
+stm32f769ng = [ "stm32-metapac/stm32f769ng" ]
+stm32f769ni = [ "stm32-metapac/stm32f769ni" ]
+stm32f777bi = [ "stm32-metapac/stm32f777bi" ]
+stm32f777ii = [ "stm32-metapac/stm32f777ii" ]
+stm32f777ni = [ "stm32-metapac/stm32f777ni" ]
+stm32f777vi = [ "stm32-metapac/stm32f777vi" ]
+stm32f777zi = [ "stm32-metapac/stm32f777zi" ]
+stm32f778ai = [ "stm32-metapac/stm32f778ai" ]
+stm32f779ai = [ "stm32-metapac/stm32f779ai" ]
+stm32f779bi = [ "stm32-metapac/stm32f779bi" ]
+stm32f779ii = [ "stm32-metapac/stm32f779ii" ]
+stm32f779ni = [ "stm32-metapac/stm32f779ni" ]
 stm32g030c6 = [ "stm32-metapac/stm32g030c6" ]
 stm32g030c8 = [ "stm32-metapac/stm32g030c8" ]
 stm32g030f6 = [ "stm32-metapac/stm32g030f6" ]

embassy-stm32/src/adc/mod.rs

@@ -1,6 +1,7 @@
 #![macro_use]
 
 #[cfg_attr(adc_v3, path = "v3.rs")]
+#[cfg_attr(adc_v2, path = "v2.rs")]
 #[cfg_attr(adc_g0, path = "v3.rs")]
 mod _version;
 

embassy-stm32/src/adc/v2.rs

@@ -0,0 +1 @@
+

embassy-stm32/src/can/bxcan.rs

@@ -119,7 +119,7 @@ crate::pac::peripherals!(
         unsafe impl bxcan::MasterInstance for peripherals::CAN1 {}
     };
     (can, CAN3) => {
-        unsafe impl bxcan::FilterOwner for peripherals::$inst {
+        unsafe impl bxcan::FilterOwner for peripherals::CAN3 {
             const NUM_FILTER_BANKS: u8 = 14;
         }
     };

embassy-stm32/src/dac/mod.rs

@@ -1,5 +1,6 @@
 #![macro_use]
 
+#[cfg_attr(dac_v1, path = "v1.rs")]
 #[cfg_attr(dac_v2, path = "v2.rs")]
 mod _version;
 use crate::gpio::NoPin;

embassy-stm32/src/dac/v1.rs

@@ -0,0 +1 @@
+

embassy-stm32/src/pwr/f7.rs

@@ -0,0 +1 @@
+

embassy-stm32/src/pwr/mod.rs

@@ -1,5 +1,6 @@
 #[cfg_attr(any(pwr_h7, pwr_h7smps), path = "h7.rs")]
 #[cfg_attr(pwr_f4, path = "f4.rs")]
+#[cfg_attr(pwr_f7, path = "f7.rs")]
 #[cfg_attr(pwr_wl5, path = "wl5.rs")]
 #[cfg_attr(pwr_g0, path = "g0.rs")]
 #[cfg_attr(pwr_l1, path = "l1.rs")]

embassy-stm32/src/rcc/f7/max.rs

@@ -0,0 +1,19 @@
+pub(crate) const HSE_OSC_MIN: u32 = 4_000_000;
+pub(crate) const HSE_OSC_MAX: u32 = 26_000_000;
+pub(crate) const HSE_BYPASS_MIN: u32 = 1_000_000;
+pub(crate) const HSE_BYPASS_MAX: u32 = 50_000_000;
+
+pub(crate) const HCLK_MAX: u32 = 216_000_000;
+pub(crate) const HCLK_OVERDRIVE_FREQUENCY: u32 = 180_000_000;
+
+pub(crate) const SYSCLK_MIN: u32 = 12_500_000;
+pub(crate) const SYSCLK_MAX: u32 = 216_000_000;
+
+pub(crate) const PCLK1_MIN: u32 = SYSCLK_MIN;
+pub(crate) const PCLK1_MAX: u32 = SYSCLK_MAX / 4;
+
+pub(crate) const PCLK2_MIN: u32 = SYSCLK_MIN;
+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;

embassy-stm32/src/rcc/f7/mod.rs

@@ -0,0 +1,347 @@
+mod max;
+
+use crate::pac::{FLASH, PWR, RCC};
+use crate::peripherals;
+use crate::rcc::{get_freqs, set_freqs, Clocks};
+use crate::time::Hertz;
+use core::marker::PhantomData;
+use embassy::util::Unborrow;
+
+const HSI: u32 = 16_000_000;
+
+#[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>,
+
+    pub pll48: bool,
+}
+
+/// RCC peripheral
+pub struct Rcc<'d> {
+    config: Config,
+    phantom: PhantomData<&'d mut peripherals::RCC>,
+}
+
+impl<'d> Rcc<'d> {
+    pub fn new(_rcc: impl Unborrow<Target = peripherals::RCC> + 'd, config: Config) -> Self {
+        if let Some(hse) = config.hse {
+            if config.bypass_hse {
+                assert!((max::HSE_BYPASS_MIN..=max::HSE_BYPASS_MAX).contains(&hse.0));
+            } else {
+                assert!((max::HSE_OSC_MIN..=max::HSE_OSC_MAX).contains(&hse.0));
+            }
+        }
+        Self {
+            config,
+            phantom: PhantomData,
+        }
+    }
+
+    fn freeze(mut self) -> Clocks {
+        use super::sealed::RccPeripheral;
+        use crate::pac::pwr::vals::Vos;
+        use crate::pac::rcc::vals::{Hpre, Hsebyp, Ppre, Sw};
+
+        let base_clock = self.config.hse.map(|hse| hse.0).unwrap_or(HSI);
+        let sysclk = self.config.sys_ck.map(|sys| sys.0).unwrap_or(base_clock);
+        let sysclk_on_pll = sysclk != base_clock;
+
+        assert!((max::SYSCLK_MIN..=max::SYSCLK_MAX).contains(&sysclk));
+
+        let plls = self.setup_pll(
+            base_clock,
+            self.config.hse.is_some(),
+            if sysclk_on_pll { Some(sysclk) } else { None },
+            self.config.pll48,
+        );
+
+        if self.config.pll48 {
+            assert!(
+                // USB specification allows +-0.25%
+                plls.pll48clk
+                    .map(|freq| (max::PLL_48_CLK as i32 - freq as i32).abs()
+                        <= max::PLL_48_TOLERANCE as i32)
+                    .unwrap_or(false)
+            );
+        }
+
+        let sysclk = if sysclk_on_pll {
+            unwrap!(plls.pllsysclk)
+        } else {
+            sysclk
+        };
+
+        // AHB prescaler
+        let hclk = self.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;
+
+        assert!(hclk < max::HCLK_MAX);
+
+        let pclk1 = self
+            .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!((max::PCLK1_MIN..=max::PCLK1_MAX).contains(&pclk1));
+
+        let pclk2 = self
+            .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!((max::PCLK2_MIN..=max::PCLK2_MAX).contains(&pclk2));
+
+        Self::flash_setup(sysclk);
+
+        if self.config.hse.is_some() {
+            // NOTE(unsafe) We own the peripheral block
+            unsafe {
+                RCC.cr().modify(|w| {
+                    w.set_hsebyp(Hsebyp(self.config.bypass_hse as u8));
+                    w.set_hseon(true);
+                });
+                while !RCC.cr().read().hserdy() {}
+            }
+        }
+
+        if plls.use_pll {
+            unsafe {
+                RCC.cr().modify(|w| w.set_pllon(false));
+
+                // enable PWR and setup VOSScale
+
+                RCC.apb1enr().modify(|w| w.set_pwren(true));
+
+                let vos_scale = if sysclk <= 144_000_000 {
+                    3
+                } else if sysclk <= 168_000_000 {
+                    2
+                } else {
+                    1
+                };
+                PWR.cr1().modify(|w| {
+                    w.set_vos(match vos_scale {
+                        3 => Vos::SCALE3,
+                        2 => Vos::SCALE2,
+                        1 => Vos::SCALE1,
+                        _ => panic!("Invalid VOS Scale."),
+                    })
+                });
+
+                RCC.cr().modify(|w| w.set_pllon(true));
+
+                while !RCC.cr().read().pllrdy() {}
+
+                if hclk > max::HCLK_OVERDRIVE_FREQUENCY {
+                    peripherals::PWR::enable();
+
+                    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() {}
+            }
+        }
+
+        unsafe {
+            RCC.cfgr().modify(|w| {
+                w.set_ppre2(Ppre(ppre2_bits));
+                w.set_ppre1(Ppre(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::PLL
+                } else if self.config.hse.is_some() {
+                    Sw::HSE
+                } else {
+                    Sw::HSI
+                })
+            });
+        }
+
+        Clocks {
+            sys: Hertz(sysclk),
+            apb1: Hertz(pclk1),
+            apb2: Hertz(pclk2),
+
+            apb1_tim: Hertz(pclk1 * timer_mul1),
+            apb2_tim: Hertz(pclk2 * timer_mul2),
+
+            ahb1: Hertz(hclk),
+            ahb2: Hertz(hclk),
+            ahb3: Hertz(hclk),
+        }
+    }
+
+    // Safety: RCC init must have been called
+    pub fn clocks(&self) -> &'static Clocks {
+        unsafe { get_freqs() }
+    }
+
+    fn setup_pll(
+        &mut self,
+        pllsrcclk: u32,
+        use_hse: bool,
+        pllsysclk: Option<u32>,
+        pll48clk: bool,
+    ) -> PllResults {
+        use crate::pac::rcc::vals::{Pllp, Pllsrc};
+
+        let sysclk = pllsysclk.unwrap_or(pllsrcclk);
+        if pllsysclk.is_none() && !pll48clk {
+            // NOTE(unsafe) We have a mutable borrow to the owner of the RegBlock
+            unsafe {
+                RCC.pllcfgr()
+                    .modify(|w| w.set_pllsrc(Pllsrc(use_hse as u8)));
+            }
+
+            return PllResults {
+                use_pll: false,
+                pllsysclk: None,
+                pll48clk: 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;
+
+        unsafe {
+            RCC.pllcfgr().modify(|w| {
+                w.set_pllm(pllm as u8);
+                w.set_plln(plln as u16);
+                w.set_pllp(Pllp(pllp as u8));
+                w.set_pllq(pllq as u8);
+                w.set_pllsrc(Pllsrc(use_hse as u8));
+            });
+        }
+
+        let real_pllsysclk = vco_in * plln / sysclk_div;
+
+        PllResults {
+            use_pll: true,
+            pllsysclk: Some(real_pllsysclk),
+            pll48clk: if pll48clk { Some(real_pll48clk) } else { None },
+        }
+    }
+
+    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(|_| unsafe {
+            FLASH
+                .acr()
+                .modify(|w| w.set_latency(Latency(((sysclk - 1) / FLASH_LATENCY_STEP) as u8)));
+        });
+    }
+}
+
+pub unsafe fn init(config: Config) {
+    let r = <peripherals::RCC as embassy::util::Steal>::steal();
+    let clocks = Rcc::new(r, config).freeze();
+    set_freqs(clocks);
+}
+
+struct PllResults {
+    use_pll: bool,
+    pllsysclk: Option<u32>,
+    pll48clk: Option<u32>,
+}

embassy-stm32/src/rcc/mod.rs

@@ -30,13 +30,13 @@ pub struct Clocks {
     #[cfg(any(rcc_l0, rcc_l1, rcc_f0, rcc_f1, rcc_f0x0, rcc_g0))]
     pub ahb: Hertz,
 
-    #[cfg(any(rcc_l4, rcc_f4, rcc_h7, rcc_wb, rcc_wl5))]
+    #[cfg(any(rcc_l4, rcc_f4, rcc_f7, rcc_h7, rcc_wb, rcc_wl5))]
     pub ahb1: Hertz,
 
-    #[cfg(any(rcc_l4, rcc_f4, rcc_h7, rcc_wb, rcc_wl5))]
+    #[cfg(any(rcc_l4, rcc_f4, rcc_f7, rcc_h7, rcc_wb, rcc_wl5))]
     pub ahb2: Hertz,
 
-    #[cfg(any(rcc_l4, rcc_f4, rcc_h7, rcc_wb, rcc_wl5))]
+    #[cfg(any(rcc_l4, rcc_f4, rcc_f7, rcc_h7, rcc_wb, rcc_wl5))]
     pub ahb3: Hertz,
 
     #[cfg(any(rcc_h7))]
@@ -85,6 +85,9 @@ cfg_if::cfg_if! {
     } else if #[cfg(rcc_f4)] {
         mod f4;
         pub use f4::*;
+    } else if #[cfg(rcc_f7)] {
+        mod f7;
+        pub use f7::*;
     } else if #[cfg(rcc_wb)] {
         mod wb;
         pub use wb::*;

embassy-stm32/src/sdmmc/mod.rs

@@ -1,6 +1,6 @@
 #![macro_use]
 
-//#[cfg_attr(sdmmc_v1, path = "v1.rs")]
+#[cfg_attr(sdmmc_v1, path = "v1.rs")]
 #[cfg_attr(sdmmc_v2, path = "v2.rs")]
 mod _version;
 

embassy-stm32/src/sdmmc/v1.rs

@@ -0,0 +1 @@
+

examples/stm32f7/.cargo/config.toml

@@ -0,0 +1,18 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# replace STM32F429ZITx with your chip as listed in `probe-run --list-chips`
+runner = "probe-run --chip STM32F767ZITx"
+
+rustflags = [
+  # LLD (shipped with the Rust toolchain) is used as the default linker
+  "-C", "link-arg=--nmagic",
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+
+  # Code-size optimizations.
+  "-Z", "trap-unreachable=no",
+  "-C", "inline-threshold=5",
+  "-C", "no-vectorize-loops",
+]
+
+[build]
+target = "thumbv7em-none-eabihf"

examples/stm32f7/Cargo.toml

@@ -0,0 +1,35 @@
+[package]
+authors = ["Dario Nieuwenhuis <dirbaio@dirbaio.net>"]
+edition = "2018"
+name = "embassy-stm32f7-examples"
+version = "0.1.0"
+resolver = "2"
+
+[features]
+default = [
+    "defmt-default",
+]
+defmt-default = []
+defmt-trace = []
+defmt-debug = []
+defmt-info = []
+defmt-warn = []
+defmt-error = []
+
+[dependencies]
+embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "defmt-trace"] }
+embassy-traits = { version = "0.1.0", path = "../../embassy-traits", features = ["defmt"] }
+embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "defmt-trace", "stm32f767zi", "unstable-pac", "time-driver-tim2"]  }
+embassy-hal-common = {version = "0.1.0", path = "../../embassy-hal-common" }
+
+defmt = "0.2.3"
+defmt-rtt = "0.2.0"
+
+cortex-m = "0.7.3"
+cortex-m-rt = "0.7.0"
+embedded-hal = "0.2.6"
+panic-probe = { version = "0.2.0", features = ["print-defmt"] }
+futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
+rtt-target = { version = "0.3.1", features = ["cortex-m"] }
+heapless = { version = "0.7.5", default-features = false }
+nb = "1.0.0"

examples/stm32f7/build.rs

@@ -0,0 +1,39 @@
+//! adapted from https://github.com/stm32-rs/stm32f7xx-hal/blob/master/build.rs
+use std::env;
+use std::fs::File;
+use std::io::{self, prelude::*};
+use std::path::PathBuf;
+
+#[derive(Debug)]
+enum Error {
+    Env(env::VarError),
+    Io(io::Error),
+}
+
+impl From<env::VarError> for Error {
+    fn from(error: env::VarError) -> Self {
+        Self::Env(error)
+    }
+}
+
+impl From<io::Error> for Error {
+    fn from(error: io::Error) -> Self {
+        Self::Io(error)
+    }
+}
+
+fn main() -> Result<(), Error> {
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-changed=memory.x");
+
+    let out_dir = env::var("OUT_DIR")?;
+    let out_dir = PathBuf::from(out_dir);
+
+    let memory_x = include_bytes!("memory.x").as_ref();
+    File::create(out_dir.join("memory.x"))?.write_all(memory_x)?;
+
+    // Tell Cargo where to find the file.
+    println!("cargo:rustc-link-search={}", out_dir.display());
+
+    Ok(())
+}

examples/stm32f7/memory.x

@@ -0,0 +1,12 @@
+/* For STM32F765,767,768,769,777,778,779 devices */
+MEMORY
+{
+  /* NOTE K = KiBi = 1024 bytes */
+  FLASH : ORIGIN = 0x08000000, LENGTH = 2M
+  RAM : ORIGIN = 0x20000000, LENGTH = 368K + 16K
+}
+
+/* This is where the call stack will be allocated. */
+/* The stack is of the full descending type. */
+/* NOTE Do NOT modify `_stack_start` unless you know what you are doing */
+_stack_start = ORIGIN(RAM) + LENGTH(RAM);

examples/stm32f7/src/bin/blinky.rs

@@ -0,0 +1,29 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use embassy::executor::Spawner;
+use embassy::time::{Duration, Timer};
+use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_stm32::Peripherals;
+use embedded_hal::digital::v2::OutputPin;
+use example_common::*;
+
+#[embassy::main]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    info!("Hello World!");
+
+    let mut led = Output::new(p.PB7, Level::High, Speed::Low);
+
+    loop {
+        info!("high");
+        unwrap!(led.set_high());
+        Timer::after(Duration::from_millis(300)).await;
+
+        info!("low");
+        unwrap!(led.set_low());
+        Timer::after(Duration::from_millis(300)).await;
+    }
+}

examples/stm32f7/src/bin/button.rs

@@ -0,0 +1,34 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use cortex_m_rt::entry;
+use embassy_stm32::gpio::{Input, Level, Output, Pull, Speed};
+use embedded_hal::digital::v2::{InputPin, OutputPin};
+use example_common::*;
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World!");
+
+    let p = embassy_stm32::init(Default::default());
+
+    let button = Input::new(p.PC13, Pull::Down);
+    let mut led1 = Output::new(p.PB0, Level::High, Speed::Low);
+    let _led2 = Output::new(p.PB7, Level::High, Speed::Low);
+    let mut led3 = Output::new(p.PB14, Level::High, Speed::Low);
+
+    loop {
+        if unwrap!(button.is_high()) {
+            info!("high");
+            unwrap!(led1.set_high());
+            unwrap!(led3.set_low());
+        } else {
+            info!("low");
+            unwrap!(led1.set_low());
+            unwrap!(led3.set_high());
+        }
+    }
+}

examples/stm32f7/src/bin/button_exti.rs

@@ -0,0 +1,29 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use embassy::executor::Spawner;
+use embassy_stm32::exti::ExtiInput;
+use embassy_stm32::gpio::{Input, Pull};
+use embassy_stm32::Peripherals;
+use embassy_traits::gpio::{WaitForFallingEdge, WaitForRisingEdge};
+use example_common::*;
+
+#[embassy::main]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    info!("Hello World!");
+
+    let button = Input::new(p.PC13, Pull::Down);
+    let mut button = ExtiInput::new(button, p.EXTI13);
+
+    info!("Press the USER button...");
+
+    loop {
+        button.wait_for_rising_edge().await;
+        info!("Pressed!");
+        button.wait_for_falling_edge().await;
+        info!("Released!");
+    }
+}

examples/stm32f7/src/bin/hello.rs

@@ -0,0 +1,27 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::info;
+use embassy::executor::Spawner;
+use embassy::time::{Duration, Timer};
+use embassy_stm32::time::Hertz;
+use embassy_stm32::Config;
+use embassy_stm32::Peripherals;
+
+#[path = "../example_common.rs"]
+mod example_common;
+
+fn config() -> Config {
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(Hertz(84_000_000));
+    config
+}
+
+#[embassy::main(config = "config()")]
+async fn main(_spawner: Spawner, _p: Peripherals) -> ! {
+    loop {
+        info!("Hello World!");
+        Timer::after(Duration::from_secs(1)).await;
+    }
+}

examples/stm32f7/src/example_common.rs

@@ -0,0 +1,17 @@
+#![macro_use]
+
+use defmt_rtt as _; // global logger
+use panic_probe as _;
+
+pub use defmt::*;
+
+use core::sync::atomic::{AtomicUsize, Ordering};
+
+defmt::timestamp! {"{=u64}", {
+        static COUNT: AtomicUsize = AtomicUsize::new(0);
+        // NOTE(no-CAS) `timestamps` runs with interrupts disabled
+        let n = COUNT.load(Ordering::Relaxed);
+        COUNT.store(n + 1, Ordering::Relaxed);
+        n as u64
+    }
+}

stm32-data

@@ -1 +1 @@
-Subproject commit bae2d34445f87e7b9a88b683c789c5d0c7560fb6
+Subproject commit 4972ce0a2a4cf2722f334809ada7be4cc6e4b615

stm32-gen-features/src/lib.rs

@@ -2,10 +2,11 @@
 
 use std::{iter::FilterMap, path::Path, slice::Iter};
 
-const SUPPORTED_FAMILIES: [&str; 10] = [
+const SUPPORTED_FAMILIES: [&str; 11] = [
     "stm32f0",
     "stm32f1",
     "stm32f4",
+    "stm32f7",
     "stm32g0",
     "stm32l0",
     "stm32l1",