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uarte: Low power wait for RX drop

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This commit is contained in:
Timo Kröger
2021-01-03 17:05:04 +01:00
parent 93780fa31d
commit 0631623b51
3 changed files with 20 additions and 12 deletions
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13
embassy-nrf/src/uarte.rs
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@ -17,8 +17,8 @@ use crate::hal::gpio::Port as GpioPort;
use crate::hal::pac;
use crate::hal::prelude::*;
use crate::hal::target_constants::EASY_DMA_SIZE;
use crate::interrupt;
use crate::interrupt::OwnedInterrupt;
use crate::{interrupt, util};
pub use crate::hal::uarte::Pins;
// Re-export SVD variants to allow user to directly set values.
@ -275,7 +275,9 @@ where
.instance
.tasks_stoptx
.write(|w| unsafe { w.bits(1) });
T::state().tx_done.blocking_wait();
// TX is stopped almost instantly, spinning is fine.
while !T::state().tx_done.signaled() {}
}
}
}
@ -342,7 +344,8 @@ where
.instance
.tasks_stoprx
.write(|w| unsafe { w.bits(1) });
T::state().rx_done.blocking_wait();
util::low_power_wait_until(|| T::state().rx_done.signaled())
}
}
}
@ -361,7 +364,7 @@ where
let ptr = buf.as_ptr();
let len = buf.len();
assert!(len <= EASY_DMA_SIZE);
uarte.enable();
compiler_fence(Ordering::SeqCst);
@ -394,7 +397,7 @@ where
T: Instance,
{
/// Stops the ongoing reception and returns the number of bytes received.
pub async fn stop(mut self) -> usize {
pub async fn stop(self) -> usize {
let len = if self.uarte.rx_started() {
trace!("stoprx (stop)");