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Merge pull request #4124 from mickem/allow_stm32_to_re_init_rcc

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Add function to allow re-init rcc config for stm32
This commit is contained in:
Dario Nieuwenhuis 2025-05-13 20:57:33 +00:00 committed by GitHub
commit 5caa4ac51b
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2 changed files with 30 additions and 11 deletions
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12
embassy-stm32/src/lib.rs
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@ -600,17 +600,7 @@ fn init_hw(config: Config) -> Peripherals {
#[cfg(feature = "exti")]
exti::init(cs);
rcc::init(config.rcc);
// must be after rcc init
#[cfg(feature = "_time-driver")]
time_driver::init(cs);
#[cfg(feature = "low-power")]
{
crate::rcc::REFCOUNT_STOP2 = 0;
crate::rcc::REFCOUNT_STOP1 = 0;
}
rcc::init_rcc(cs, config.rcc);
}
p

29
embassy-stm32/src/rcc/mod.rs
View File

@ -371,3 +371,32 @@ pub fn enable_and_reset<T: RccPeripheral>() {
pub fn disable<T: RccPeripheral>() {
T::RCC_INFO.disable();
}
/// Re-initialize the `embassy-stm32` clock configuration with the provided configuration.
///
/// This is useful when you need to alter the CPU clock after configuring peripherals.
/// For instance, configure an external clock via spi or i2c.
///
/// Please not this only re-configures the rcc and the time driver (not GPIO, EXTI, etc).
///
/// This should only be called after `init`.
#[cfg(not(feature = "_dual-core"))]
pub fn reinit(config: Config) {
critical_section::with(|cs| init_rcc(cs, config))
}
pub(crate) fn init_rcc(_cs: CriticalSection, config: Config) {
unsafe {
init(config);
// must be after rcc init
#[cfg(feature = "_time-driver")]
crate::time_driver::init(_cs);
#[cfg(feature = "low-power")]
{
REFCOUNT_STOP2 = 0;
REFCOUNT_STOP1 = 0;
}
}
}