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stm32: get the basic lp working

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This commit is contained in:
xoviat
2023-08-26 19:23:25 -05:00
parent 3023e70ccf
commit 2897670f24
3 changed files with 196 additions and 92 deletions
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55
embassy-stm32/src/rtc/v2.rs
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@ -30,6 +30,8 @@ impl RtcInstant {
let _ = RTC::regs().dr().read();
trace!("rtc: instant now: st, ssr: {}, {}", st, ssr);
Self { ssr, st }
}
}
@ -146,6 +148,21 @@ impl super::Rtc {
}
}
// pub(crate) fn clear_wakeup_alarm(&self) {
// use crate::interrupt::typelevel::Interrupt;
//
// self.write(false, |regs| {
// regs.cr().modify(|w| w.set_wutie(false));
//
// regs.isr().modify(|w| w.set_wutf(false));
// crate::pac::PWR.cr1().modify(|w| w.set_cwuf(false));
// crate::pac::EXTI.pr(0).modify(|w| w.set_line(22, false));
// crate::interrupt::typelevel::RTC_WKUP::unpend();
//
// regs.cr().modify(|w| w.set_wutie(true));
// });
// }
#[allow(dead_code)]
#[cfg(all(feature = "time", any(stm32wb, stm32f4)))]
/// start the wakeup alarm and return the actual duration of the alarm
@ -157,6 +174,7 @@ impl super::Rtc {
pub(crate) fn start_wakeup_alarm(&self, requested_duration: embassy_time::Duration) -> RtcInstant {
use embassy_time::{Duration, TICK_HZ};
use crate::interrupt::typelevel::Interrupt;
use crate::rcc::get_freqs;
let rtc_hz = unsafe { get_freqs() }.rtc.unwrap().0 as u64;
@ -176,28 +194,40 @@ impl super::Rtc {
rtc_ticks as u64 * TICK_HZ * (<WakeupPrescaler as Into<u32>>::into(prescaler) as u64) / rtc_hz,
);
trace!("rtc: set wakeup timer for {} ms", duration.as_millis());
self.write(false, |regs| {
// regs.cr().modify(|w| w.set_wutie(true));
regs.cr().modify(|w| w.set_wute(false));
regs.isr().modify(|w| w.set_wutf(false));
while !regs.isr().read().wutwf() {}
regs.cr().modify(|w| w.set_wucksel(prescaler.into()));
regs.cr().modify(|w| w.set_wute(true));
});
self.write(false, |regs| {
regs.cr().modify(|w| w.set_wutie(false));
regs.isr().modify(|w| w.set_wutf(false));
crate::pac::PWR.cr1().modify(|w| w.set_cwuf(false));
regs.cr().modify(|w| w.set_wutie(true));
});
trace!("rtc: start wakeup alarm for {} ms", duration.as_millis());
// self.write(false, |regs| {
// regs.cr().modify(|w| w.set_wutie(false));
//
// regs.isr().modify(|w| w.set_wutf(false));
//
// regs.cr().modify(|w| w.set_wutie(true));
// });
//
// trace!("rtc: clear wuf...");
// crate::pac::PWR.cr1().modify(|w| w.set_cwuf(true));
// while crate::pac::PWR.csr1().read().wuf() {}
// trace!("rtc: clear wuf...done");
//
// crate::pac::PWR
// .cr1()
// .modify(|w| w.set_pdds(crate::pac::pwr::vals::Pdds::STANDBY_MODE));
//
// // crate::pac::PWR.cr1().modify(|w| w.set_lpds(true));
//
// // crate::pac::EXTI.pr(0).modify(|w| w.set_line(22, true));
// crate::interrupt::typelevel::RTC_WKUP::unpend();
RtcInstant::now()
}
@ -211,6 +241,7 @@ impl super::Rtc {
trace!("rtc: stop wakeup alarm...");
self.write(false, |regs| {
regs.cr().modify(|w| w.set_wutie(false));
regs.cr().modify(|w| w.set_wute(false));
regs.isr().modify(|w| w.set_wutf(false));
});