embedded_hal_async/delay.rs
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//! Delays.
/// Delay with up to nanosecond precision.
pub trait DelayNs {
/// Pauses execution for at minimum `ns` nanoseconds. Pause can be longer
/// if the implementation requires it due to precision/timing issues.
async fn delay_ns(&mut self, ns: u32);
/// Pauses execution for at minimum `us` microseconds. Pause can be longer
/// if the implementation requires it due to precision/timing issues.
async fn delay_us(&mut self, mut us: u32) {
while us > 4_294_967 {
us -= 4_294_967;
self.delay_ns(4_294_967_000).await;
}
self.delay_ns(us * 1_000).await;
}
/// Pauses execution for at minimum `ms` milliseconds. Pause can be longer
/// if the implementation requires it due to precision/timing issues.
#[inline]
async fn delay_ms(&mut self, mut ms: u32) {
while ms > 4294 {
ms -= 4294;
self.delay_ns(4_294_000_000).await;
}
self.delay_ns(ms * 1_000_000).await;
}
}
impl<T> DelayNs for &mut T
where
T: DelayNs + ?Sized,
{
#[inline]
async fn delay_ns(&mut self, ns: u32) {
T::delay_ns(self, ns).await;
}
#[inline]
async fn delay_us(&mut self, us: u32) {
T::delay_us(self, us).await;
}
#[inline]
async fn delay_ms(&mut self, ms: u32) {
T::delay_ms(self, ms).await;
}
}