53 lines
1.2 KiB
Rust
53 lines
1.2 KiB
Rust
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use core::marker::PhantomData;
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use embassy::util::Unborrow;
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use embassy_hal_common::unborrow;
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use stm32_metapac::iwdg::vals::Key;
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pub use stm32_metapac::iwdg::vals::Pr as Prescaler;
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pub struct IndependentWatchdog<'d, T: Instance> {
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wdg: PhantomData<&'d mut T>,
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}
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impl<'d, T: Instance> IndependentWatchdog<'d, T> {
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pub fn new(_instance: impl Unborrow<Target = T>, presc: Prescaler) -> Self {
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unborrow!(_instance);
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let wdg = T::regs();
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unsafe {
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wdg.kr().write(|w| w.set_key(Key::ENABLE));
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wdg.pr().write(|w| w.set_pr(presc));
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}
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IndependentWatchdog {
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wdg: PhantomData::default(),
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}
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}
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pub unsafe fn unleash(&mut self) {
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T::regs().kr().write(|w| w.set_key(Key::START));
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}
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pub unsafe fn feed(&mut self) {
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T::regs().kr().write(|w| w.set_key(Key::RESET));
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}
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}
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mod sealed {
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pub trait Instance {
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fn regs() -> crate::pac::iwdg::Iwdg;
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}
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}
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pub trait Instance: sealed::Instance {}
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impl sealed::Instance for crate::peripherals::IWDG {
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fn regs() -> crate::pac::iwdg::Iwdg {
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crate::pac::IWDG
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}
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}
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impl Instance for crate::peripherals::IWDG {}
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