Struct dwt_systick_monotonic::DwtSystick

pub struct DwtSystick<const FREQ: u32> { /* fields omitted */ }

DWT and Systick combination implementing embedded_time::Clock and rtic_monotonic::Monotonic

The frequency of the DWT and SysTick is encoded using the parameter FREQ.

Implementations

impl<const FREQ: u32> DwtSystick<FREQ>

pub fn new(dcb: &mut DCB, dwt: DWT, systick: SYST, sysclk: u32) -> Self

Enable the DWT and provide a new Monotonic based on DWT and SysTick.

Note that the sysclk parameter should come from e.g. the HAL’s clock generation function so the real speed and the declared speed can be compared.

Trait Implementations

impl<const FREQ: u32> Clock for DwtSystick<FREQ>

type T = u32

The type to hold the tick count

const SCALING_FACTOR: Fraction

The duration of one clock tick in seconds, AKA the clock precision.

fn try_now(&self) -> Result<Instant<Self>, Error>

Get the current Instant

fn new_timer<Dur>(&self, duration: Dur) -> Timer<'_, OneShot, Armed, Self, Dur> where
    Dur: Duration + FixedPoint, 

Spawn a new, OneShot Timer from this clock

impl<const FREQ: u32> Monotonic for DwtSystick<FREQ>

const DISABLE_INTERRUPT_ON_EMPTY_QUEUE: bool

This tells RTIC if it should disable the interrupt bound to the monotonic if there are no scheduled tasks. One may want to set this to false if one is using the on_interrupt method to perform housekeeping and need overflow interrupts to happen, such as when extending a 16 bit timer to 32/64 bits, even if there are no scheduled tasks.

unsafe fn reset(&mut self)

Optionally resets the counter to zero for a fixed baseline in a system.

fn set_compare(&mut self, val: &Instant<Self>)

Set the compare value of the timer interrupt.

fn clear_compare_flag(&mut self)

Clear the compare interrupt flag.

fn on_interrupt(&mut self)

Optional. Commonly used for performing housekeeping of a timer when it has been extended, e.g. a 16 bit timer extended to 32/64 bits. This will be called at the end of the interrupt handler after all other operations have finished.

fn enable_timer(&mut self)

Optional. This is used to save power, this is called when the Monotonic interrupt is enabled.

fn disable_timer(&mut self)

Optional. This is used to save power, this is called when the Monotonic interrupt is disabled.