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stm32: rtc/low-power cleanup

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This commit is contained in:
xoviat
2023-09-15 18:41:33 -05:00
parent 5a158b94bd
commit 6da75ea285
5 changed files with 63 additions and 83 deletions
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40
embassy-stm32/src/rtc/mod.rs
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@ -124,9 +124,6 @@ impl Default for RtcCalibrationCyclePeriod {
impl Rtc {
pub fn new(_rtc: impl Peripheral<P = RTC>, rtc_config: RtcConfig) -> Self {
#[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
use crate::rcc::get_freqs;
RTC::enable_peripheral_clk();
BackupDomain::enable_rtc();
@ -135,20 +132,7 @@ impl Rtc {
stop_time: Mutex::const_new(CriticalSectionRawMutex::new(), Cell::new(None)),
};
#[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
let freqs = unsafe { get_freqs() };
// Load the clock frequency from the rcc mod, if supported
#[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
let frequency = match freqs.rtc {
Some(hertz) => hertz,
None => freqs.rtc_hse.unwrap(),
};
// Assume the default value, if not supported
#[cfg(not(any(rcc_wb, rcc_f4, rcc_f410)))]
let frequency = Hertz(32_768);
let frequency = Self::frequency();
let async_psc = ((frequency.0 / rtc_config.frequency.0) - 1) as u8;
let sync_psc = (rtc_config.frequency.0 - 1) as u16;
@ -157,6 +141,22 @@ impl Rtc {
this
}
fn frequency() -> Hertz {
#[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
let freqs = unsafe { crate::rcc::get_freqs() };
// Load the clock frequency from the rcc mod, if supported
#[cfg(any(rcc_wb, rcc_f4, rcc_f410))]
match freqs.rtc {
Some(hertz) => hertz,
None => freqs.rtc_hse.unwrap(),
}
// Assume the default value, if not supported
#[cfg(not(any(rcc_wb, rcc_f4, rcc_f410)))]
Hertz(32_768)
}
/// Set the datetime to a new value.
///
/// # Errors
@ -264,6 +264,12 @@ pub(crate) mod sealed {
pub trait Instance {
const BACKUP_REGISTER_COUNT: usize;
#[cfg(feature = "low-power")]
const EXTI_WAKEUP_LINE: usize;
#[cfg(feature = "low-power")]
type WakeupInterrupt: crate::interrupt::typelevel::Interrupt;
fn regs() -> Rtc {
crate::pac::RTC
}