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stm32: ensure the core runs on HSI clock while setting up rcc

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This commit is contained in:
Aurélien Jacobs 2024-04-16 23:36:47 +02:00
parent bd13b5c060
commit 10ee1c1ae8
1 changed files with 15 additions and 9 deletions
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24
embassy-stm32/src/rcc/f247.rs
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@ -146,17 +146,18 @@ pub(crate) unsafe fn init(config: Config) {
while !PWR.csr1().read().odswrdy() {}
}
// Turn on the HSI
RCC.cr().modify(|w| w.set_hsion(true));
while !RCC.cr().read().hsirdy() {}
// Use the HSI clock as system clock during the actual clock setup
RCC.cfgr().modify(|w| w.set_sw(Sysclk::HSI));
while RCC.cfgr().read().sws() != Sysclk::HSI {}
// Configure HSI
let hsi = match config.hsi {
false => {
RCC.cr().modify(|w| w.set_hsion(false));
None
}
true => {
RCC.cr().modify(|w| w.set_hsion(true));
while !RCC.cr().read().hsirdy() {}
Some(HSI_FREQ)
}
false => None,
true => Some(HSI_FREQ),
};
// Configure HSE
@ -260,6 +261,11 @@ pub(crate) unsafe fn init(config: Config) {
});
while RCC.cfgr().read().sws() != config.sys {}
// Disable HSI if not used
if !config.hsi {
RCC.cr().modify(|w| w.set_hsion(false));
}
config.mux.init();
set_clocks!(