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stm32/rtc: implement stop_wakeup_alarm

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This commit is contained in:
xoviat 2023-08-10 19:13:48 -05:00
parent a0c69ffe02
commit b69861013a
1 changed files with 11 additions and 7 deletions
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18
embassy-stm32/src/rtc/v2.rs
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@ -137,20 +137,24 @@ impl super::Rtc {
use crate::interrupt::typelevel::Interrupt;
use crate::rcc::get_freqs;
crate::interrupt::typelevel::RTC_WKUP::disable();
RTC::regs().cr().modify(|w| {
w.set_wute(false);
});
let rtc_hz = unsafe { get_freqs() }.rtc.unwrap().0 as u64;
// Wait for the wakeup timer to stop
while !RTC::regs().isr().read().wutf() {}
// Choose the lowest prescaler available
#[cfg(stm32wb)]
let rtc_hz = rtc_hz / 2;
RTC::regs().isr().modify(|w| w.set_wutf(false));
crate::interrupt::typelevel::RTC_WKUP::disable();
let rtc_hz = unsafe { get_freqs() }.rtc.unwrap().0 as u64;
let prescaler: WakeupPrescaler = RTC::regs().cr().read().wucksel().into();
let rtc_ticks = RTC::regs().wutr().read().wut();
Duration::from_ticks(rtc_ticks as u64 * TICK_HZ / rtc_hz)
Duration::from_ticks(
rtc_ticks as u64 * TICK_HZ * (<WakeupPrescaler as Into<u32>>::into(prescaler) as u64) / rtc_hz,
)
}
#[allow(dead_code)]