101 lines
2.8 KiB
Rust
101 lines
2.8 KiB
Rust
use super::{Duration, Instant};
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/// Blocks for at least `duration`.
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pub fn block_for(duration: Duration) {
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let expires_at = Instant::now() + duration;
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while Instant::now() < expires_at {}
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}
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/// Type implementing async delays and blocking `embedded-hal` delays.
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///
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/// The delays are implemented in a "best-effort" way, meaning that the cpu will block for at least
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/// the amount provided, but accuracy can be affected by many factors, including interrupt usage.
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/// Make sure to use a suitable tick rate for your use case. The tick rate is defined by the currently
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/// active driver.
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pub struct Delay;
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#[cfg(feature = "unstable-traits")]
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mod eh1 {
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use super::*;
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impl embedded_hal_1::delay::DelayUs for Delay {
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type Error = core::convert::Infallible;
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fn delay_us(&mut self, us: u32) -> Result<(), Self::Error> {
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Ok(block_for(Duration::from_micros(us as u64)))
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}
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fn delay_ms(&mut self, ms: u32) -> Result<(), Self::Error> {
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Ok(block_for(Duration::from_millis(ms as u64)))
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}
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}
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}
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#[cfg(all(feature = "unstable-traits", feature = "nightly"))]
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mod eha {
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use core::future::Future;
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use futures_util::FutureExt;
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use super::*;
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use crate::Timer;
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impl embedded_hal_async::delay::DelayUs for Delay {
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type Error = core::convert::Infallible;
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type DelayUsFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
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fn delay_us(&mut self, micros: u32) -> Self::DelayUsFuture<'_> {
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Timer::after(Duration::from_micros(micros as _)).map(Ok)
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}
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type DelayMsFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
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fn delay_ms(&mut self, millis: u32) -> Self::DelayMsFuture<'_> {
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Timer::after(Duration::from_millis(millis as _)).map(Ok)
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}
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}
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}
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mod eh02 {
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use embedded_hal_02::blocking::delay::{DelayMs, DelayUs};
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use super::*;
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impl DelayMs<u8> for Delay {
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fn delay_ms(&mut self, ms: u8) {
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block_for(Duration::from_millis(ms as u64))
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}
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}
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impl DelayMs<u16> for Delay {
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fn delay_ms(&mut self, ms: u16) {
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block_for(Duration::from_millis(ms as u64))
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}
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}
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impl DelayMs<u32> for Delay {
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fn delay_ms(&mut self, ms: u32) {
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block_for(Duration::from_millis(ms as u64))
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}
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}
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impl DelayUs<u8> for Delay {
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fn delay_us(&mut self, us: u8) {
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block_for(Duration::from_micros(us as u64))
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}
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}
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impl DelayUs<u16> for Delay {
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fn delay_us(&mut self, us: u16) {
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block_for(Duration::from_micros(us as u64))
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}
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}
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impl DelayUs<u32> for Delay {
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fn delay_us(&mut self, us: u32) {
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block_for(Duration::from_micros(us as u64))
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}
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}
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}
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