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Add MCO support for stm32wl family

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This commit is contained in:
shakencodes
2023-10-06 14:36:16 -07:00
parent f30fc949ff
commit 68c4820dde
3 changed files with 25 additions and 34 deletions
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24
embassy-stm32/src/rcc/mco.rs
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@ -4,14 +4,18 @@ use embassy_hal_internal::into_ref;
use crate::gpio::sealed::AFType;
use crate::gpio::Speed;
#[cfg(not(stm32wl))]
pub use crate::pac::rcc::vals::{Mco1 as Mco1Source, Mco2 as Mco2Source};
#[cfg(stm32wl)]
pub use crate::pac::rcc::vals::{Mcopre, Mcosel};
use crate::pac::RCC;
use crate::{peripherals, Peripheral};
pub(crate) mod sealed {
pub trait McoInstance {
type Source;
unsafe fn apply_clock_settings(source: Self::Source, prescaler: u8);
type Prescaler;
unsafe fn apply_clock_settings(source: Self::Source, prescaler: Self::Prescaler);
}
}
@ -20,11 +24,12 @@ pub trait McoInstance: sealed::McoInstance + 'static {}
pin_trait!(McoPin, McoInstance);
macro_rules! impl_peri {
($peri:ident, $source:ident, $set_source:ident, $set_prescaler:ident) => {
($peri:ident, $source:ident, $prescaler:ident, $set_source:ident, $set_prescaler:ident) => {
impl sealed::McoInstance for peripherals::$peri {
type Source = $source;
type Prescaler = $prescaler;
unsafe fn apply_clock_settings(source: Self::Source, prescaler: u8) {
unsafe fn apply_clock_settings(source: Self::Source, prescaler: Self::Prescaler) {
RCC.cfgr().modify(|w| {
w.$set_source(source);
w.$set_prescaler(prescaler);
@ -36,8 +41,12 @@ macro_rules! impl_peri {
};
}
impl_peri!(MCO1, Mco1Source, set_mco1, set_mco1pre);
impl_peri!(MCO2, Mco2Source, set_mco2, set_mco2pre);
#[cfg(not(stm32wl))]
impl_peri!(MCO1, Mco1Source, u8, set_mco1, set_mco1pre);
#[cfg(not(stm32wl))]
impl_peri!(MCO2, Mco2Source, u8, set_mco2, set_mco2pre);
#[cfg(stm32wl)]
impl_peri!(MCO, Mcosel, Mcopre, set_mcosel, set_mcopre);
pub struct Mco<'d, T: McoInstance> {
phantom: PhantomData<&'d mut T>,
@ -46,15 +55,16 @@ pub struct Mco<'d, T: McoInstance> {
impl<'d, T: McoInstance> Mco<'d, T> {
/// Create a new MCO instance.
///
/// `prescaler` must be between 1 and 15.
/// `prescaler` must be between 1 and 15 for implementations not using Presel enum.
pub fn new(
_peri: impl Peripheral<P = T> + 'd,
pin: impl Peripheral<P = impl McoPin<T>> + 'd,
source: T::Source,
prescaler: u8,
prescaler: T::Prescaler,
) -> Self {
into_ref!(pin);
#[cfg(not(stm32wl))]
assert!(
1 <= prescaler && prescaler <= 15,
"Mco prescaler must be between 1 and 15. Refer to the reference manual for more information."