Struct AonTimer

pub struct AonTimer { /* private fields */ }

Implementations

impl AonTimer

pub const fn new( base: StaticRef<AonTimerRegisters>, aon_clk_freq: u32, ) -> AonTimer

pub fn handle_interrupt(&self)

Trait Implementations

impl WatchDog for AonTimer

fn setup(&self)

The always-on timer will run on a ~125KHz (Verilator) or ~250kHz clock. The timers themselves are 32b wide, giving a maximum timeout window of roughly ~6 hours. For the wakeup timer, the pre-scaler extends the maximum timeout to ~1000 days.

The AON HW_IP has a watchdog and a wake-up timer (counts independantly of eachother), although struct AonTimer implements the wakeup timer functionality, we only start and use the watchdog in the code below.

fn tickle(&self)

This function must tickle the watchdog to reset the timer. If the watchdog was previously suspended then this should also resume the timer.

fn suspend(&self)

Suspends the watchdog timer. After calling this the timer should not fire until after tickle() has been called. This function is called before sleeping.

fn resume(&self)

Resumes the watchdog timer. After calling this the timer should be running again. This is called after returning from sleep, after suspend() was called.