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Merge pull request #2825 from MaxiluxSystems/fix/adc-blocking-delay-overflow

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stm32: adc: fix blocking_delay_us() overflowing when sys freq is high
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Dario Nieuwenhuis 2024-04-16 14:22:39 +00:00 committed by GitHub
commit b3710a31f0
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1 changed files with 6 additions and 1 deletions
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7
embassy-stm32/src/adc/mod.rs
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@ -76,7 +76,12 @@ pub(crate) fn blocking_delay_us(us: u32) {
#[cfg(time)] #[cfg(time)]
embassy_time::block_for(embassy_time::Duration::from_micros(us)); embassy_time::block_for(embassy_time::Duration::from_micros(us));
#[cfg(not(time))] #[cfg(not(time))]
cortex_m::asm::delay(unsafe { crate::rcc::get_freqs() }.sys.unwrap().0 * us / 1_000_000); {
let freq = unsafe { crate::rcc::get_freqs() }.sys.unwrap().0 as u64;
let us = us as u64;
let cycles = freq * us / 1_000_000;
cortex_m::asm::delay(cycles as u32);
}
} }
/// ADC instance. /// ADC instance.