146 lines
3.9 KiB
Rust
146 lines
3.9 KiB
Rust
#![macro_use]
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pub mod common;
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use core::mem::MaybeUninit;
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use crate::time::Hertz;
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#[cfg_attr(rcc_f0, path = "f0.rs")]
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#[cfg_attr(any(rcc_f1, rcc_f100, rcc_f1cl), path = "f1.rs")]
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#[cfg_attr(rcc_f2, path = "f2.rs")]
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#[cfg_attr(any(rcc_f3, rcc_f3_v2), path = "f3.rs")]
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#[cfg_attr(any(rcc_f4, rcc_f410), path = "f4.rs")]
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#[cfg_attr(rcc_f7, path = "f7.rs")]
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#[cfg_attr(rcc_c0, path = "c0.rs")]
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#[cfg_attr(rcc_g0, path = "g0.rs")]
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#[cfg_attr(rcc_g4, path = "g4.rs")]
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#[cfg_attr(any(rcc_h7, rcc_h7ab), path = "h7.rs")]
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#[cfg_attr(rcc_l0, path = "l0.rs")]
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#[cfg_attr(rcc_l1, path = "l1.rs")]
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#[cfg_attr(rcc_l4, path = "l4.rs")]
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#[cfg_attr(rcc_l5, path = "l5.rs")]
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#[cfg_attr(rcc_u5, path = "u5.rs")]
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#[cfg_attr(rcc_wb, path = "wb.rs")]
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#[cfg_attr(any(rcc_wl5, rcc_wle), path = "wl.rs")]
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#[cfg_attr(any(rcc_h5, rcc_h50), path = "h5.rs")]
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mod _version;
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pub use _version::*;
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#[cfg(feature = "low-power")]
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use atomic_polyfill::{AtomicU32, Ordering};
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#[derive(Clone, Copy, Debug)]
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#[cfg_attr(feature = "defmt", derive(defmt::Format))]
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pub struct Clocks {
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pub sys: Hertz,
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// APB
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pub apb1: Hertz,
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pub apb1_tim: Hertz,
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#[cfg(not(any(rcc_c0, rcc_g0)))]
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pub apb2: Hertz,
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#[cfg(not(any(rcc_c0, rcc_g0)))]
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pub apb2_tim: Hertz,
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#[cfg(any(rcc_wl5, rcc_wle, rcc_h5, rcc_h50, rcc_u5))]
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pub apb3: Hertz,
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#[cfg(any(rcc_h7, rcc_h7ab))]
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pub apb4: Hertz,
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// AHB
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pub ahb1: Hertz,
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#[cfg(any(
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rcc_l4, rcc_l5, rcc_f2, rcc_f4, rcc_f410, rcc_f7, rcc_h5, rcc_h50, rcc_h7, rcc_h7ab, rcc_g4, rcc_u5, rcc_wb,
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rcc_wl5, rcc_wle
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))]
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pub ahb2: Hertz,
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#[cfg(any(
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rcc_l4, rcc_l5, rcc_f2, rcc_f4, rcc_f410, rcc_f7, rcc_h5, rcc_h50, rcc_h7, rcc_h7ab, rcc_u5, rcc_wb, rcc_wl5,
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rcc_wle
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))]
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pub ahb3: Hertz,
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#[cfg(any(rcc_h5, rcc_h50, rcc_h7, rcc_h7ab))]
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pub ahb4: Hertz,
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#[cfg(any(rcc_f2, rcc_f4, rcc_f410, rcc_f7))]
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pub pll48: Option<Hertz>,
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#[cfg(all(rcc_f4, not(stm32f410)))]
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pub plli2s: Option<Hertz>,
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#[cfg(any(stm32f427, stm32f429, stm32f437, stm32f439, stm32f446, stm32f469, stm32f479))]
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pub pllsai: Option<Hertz>,
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#[cfg(stm32f1)]
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pub adc: Hertz,
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#[cfg(any(rcc_h5, rcc_h50, rcc_h7, rcc_h7ab))]
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pub adc: Option<Hertz>,
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#[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
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/// Set only if the lsi or lse is configured
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pub rtc: Option<Hertz>,
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}
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#[cfg(feature = "low-power")]
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static CLOCK_REFCOUNT: AtomicU32 = AtomicU32::new(0);
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#[cfg(feature = "low-power")]
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pub fn low_power_ready() -> bool {
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trace!("clock refcount: {}", CLOCK_REFCOUNT.load(Ordering::SeqCst));
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CLOCK_REFCOUNT.load(Ordering::SeqCst) == 0
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}
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#[cfg(feature = "low-power")]
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pub(crate) fn clock_refcount_add() {
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// We don't check for overflow because constructing more than u32 peripherals is unlikely
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CLOCK_REFCOUNT.fetch_add(1, Ordering::Relaxed);
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}
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#[cfg(feature = "low-power")]
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pub(crate) fn clock_refcount_sub() {
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assert!(CLOCK_REFCOUNT.fetch_sub(1, Ordering::Relaxed) != 0);
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}
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/// Frozen clock frequencies
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///
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/// The existence of this value indicates that the clock configuration can no longer be changed
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static mut CLOCK_FREQS: MaybeUninit<Clocks> = MaybeUninit::uninit();
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#[cfg(stm32wb)]
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/// RCC initialization function
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pub(crate) unsafe fn init(config: Config) {
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set_freqs(compute_clocks(&config));
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configure_clocks(&config);
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}
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/// Sets the clock frequencies
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///
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/// Safety: Sets a mutable global.
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pub(crate) unsafe fn set_freqs(freqs: Clocks) {
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debug!("rcc: {:?}", freqs);
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CLOCK_FREQS = MaybeUninit::new(freqs);
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}
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/// Safety: Reads a mutable global.
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pub(crate) unsafe fn get_freqs() -> &'static Clocks {
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CLOCK_FREQS.assume_init_ref()
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}
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#[cfg(feature = "unstable-pac")]
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pub mod low_level {
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pub use super::sealed::*;
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}
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pub(crate) mod sealed {
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pub trait RccPeripheral {
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fn frequency() -> crate::time::Hertz;
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fn reset();
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fn enable();
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fn disable();
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}
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}
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pub trait RccPeripheral: sealed::RccPeripheral + 'static {}
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