Replace embassy::io with embedded_io.
This commit is contained in:
Dario Nieuwenhuis
@ -1,10 +1,12 @@
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#![macro_use]
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#[cfg(feature = "net")]
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#[cfg_attr(any(eth_v1a, eth_v1b, eth_v1c), path = "v1/mod.rs")]
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#[cfg_attr(eth_v2, path = "v2/mod.rs")]
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mod _version;
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pub mod generic_smi;
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#[cfg(feature = "net")]
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pub use _version::*;
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/// Station Management Interface (SMI) on an ethernet PHY
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@ -39,7 +39,7 @@ pub mod can;
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pub mod dac;
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#[cfg(dcmi)]
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pub mod dcmi;
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#[cfg(all(eth, feature = "net"))]
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#[cfg(eth)]
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pub mod eth;
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#[cfg(feature = "exti")]
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pub mod exti;
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238
embassy-stm32/src/usart/buffered.rs
Normal file
238
embassy-stm32/src/usart/buffered.rs
Normal file
@ -0,0 +1,238 @@
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use atomic_polyfill::{compiler_fence, Ordering};
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use core::future::Future;
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use core::task::Poll;
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use embassy::waitqueue::WakerRegistration;
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use embassy_hal_common::peripheral::{PeripheralMutex, PeripheralState, StateStorage};
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use embassy_hal_common::ring_buffer::RingBuffer;
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use futures::future::poll_fn;
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use super::*;
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pub struct State<'d, T: Instance>(StateStorage<StateInner<'d, T>>);
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impl<'d, T: Instance> State<'d, T> {
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pub fn new() -> Self {
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Self(StateStorage::new())
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}
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}
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struct StateInner<'d, T: Instance> {
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phantom: PhantomData<&'d mut T>,
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rx_waker: WakerRegistration,
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rx: RingBuffer<'d>,
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tx_waker: WakerRegistration,
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tx: RingBuffer<'d>,
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}
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unsafe impl<'d, T: Instance> Send for StateInner<'d, T> {}
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unsafe impl<'d, T: Instance> Sync for StateInner<'d, T> {}
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pub struct BufferedUart<'d, T: Instance> {
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inner: PeripheralMutex<'d, StateInner<'d, T>>,
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}
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impl<'d, T: Instance> Unpin for BufferedUart<'d, T> {}
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impl<'d, T: Instance> BufferedUart<'d, T> {
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pub unsafe fn new(
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state: &'d mut State<'d, T>,
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_uart: Uart<'d, T, NoDma, NoDma>,
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irq: impl Unborrow<Target = T::Interrupt> + 'd,
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tx_buffer: &'d mut [u8],
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rx_buffer: &'d mut [u8],
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) -> BufferedUart<'d, T> {
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unborrow!(irq);
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let r = T::regs();
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r.cr1().modify(|w| {
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w.set_rxneie(true);
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w.set_idleie(true);
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});
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Self {
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inner: PeripheralMutex::new_unchecked(irq, &mut state.0, move || StateInner {
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phantom: PhantomData,
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tx: RingBuffer::new(tx_buffer),
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tx_waker: WakerRegistration::new(),
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rx: RingBuffer::new(rx_buffer),
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rx_waker: WakerRegistration::new(),
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}),
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}
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}
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}
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impl<'d, T: Instance> StateInner<'d, T>
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where
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Self: 'd,
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{
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fn on_rx(&mut self) {
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let r = T::regs();
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unsafe {
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let sr = sr(r).read();
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clear_interrupt_flags(r, sr);
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// This read also clears the error and idle interrupt flags on v1.
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let b = rdr(r).read_volatile();
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if sr.rxne() {
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if sr.pe() {
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warn!("Parity error");
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}
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if sr.fe() {
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warn!("Framing error");
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}
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if sr.ne() {
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warn!("Noise error");
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}
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if sr.ore() {
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warn!("Overrun error");
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}
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let buf = self.rx.push_buf();
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if !buf.is_empty() {
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buf[0] = b;
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self.rx.push(1);
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} else {
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warn!("RX buffer full, discard received byte");
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}
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if self.rx.is_full() {
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self.rx_waker.wake();
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}
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}
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if sr.idle() {
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self.rx_waker.wake();
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};
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}
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}
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fn on_tx(&mut self) {
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let r = T::regs();
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unsafe {
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if sr(r).read().txe() {
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let buf = self.tx.pop_buf();
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if !buf.is_empty() {
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r.cr1().modify(|w| {
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w.set_txeie(true);
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});
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tdr(r).write_volatile(buf[0].into());
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self.tx.pop(1);
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self.tx_waker.wake();
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} else {
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// Disable interrupt until we have something to transmit again
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r.cr1().modify(|w| {
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w.set_txeie(false);
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});
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}
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}
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}
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}
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}
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impl<'d, T: Instance> PeripheralState for StateInner<'d, T>
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where
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Self: 'd,
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{
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type Interrupt = T::Interrupt;
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fn on_interrupt(&mut self) {
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self.on_rx();
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self.on_tx();
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}
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}
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impl embedded_io::Error for Error {
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fn kind(&self) -> embedded_io::ErrorKind {
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embedded_io::ErrorKind::Other
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}
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}
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impl<'d, T: Instance> embedded_io::Io for BufferedUart<'d, T> {
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type Error = Error;
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}
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impl<'d, T: Instance> embedded_io::asynch::Read for BufferedUart<'d, T> {
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type ReadFuture<'a> = impl Future<Output = Result<usize, Self::Error>>
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where
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Self: 'a;
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fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> Self::ReadFuture<'a> {
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poll_fn(move |cx| {
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let mut do_pend = false;
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let res = self.inner.with(|state| {
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compiler_fence(Ordering::SeqCst);
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// We have data ready in buffer? Return it.
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let data = state.rx.pop_buf();
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if !data.is_empty() {
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let len = data.len().min(buf.len());
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buf[..len].copy_from_slice(&data[..len]);
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if state.rx.is_full() {
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do_pend = true;
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}
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state.rx.pop(len);
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return Poll::Ready(Ok(len));
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}
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state.rx_waker.register(cx.waker());
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Poll::Pending
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});
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if do_pend {
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self.inner.pend();
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}
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res
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})
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}
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}
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impl<'d, T: Instance> embedded_io::asynch::Write for BufferedUart<'d, T> {
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type WriteFuture<'a> = impl Future<Output = Result<usize, Self::Error>>
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where
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Self: 'a;
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fn write<'a>(&'a mut self, buf: &'a [u8]) -> Self::WriteFuture<'a> {
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poll_fn(move |cx| {
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let (poll, empty) = self.inner.with(|state| {
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let empty = state.tx.is_empty();
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let tx_buf = state.tx.push_buf();
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if tx_buf.is_empty() {
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state.tx_waker.register(cx.waker());
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return (Poll::Pending, empty);
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}
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let n = core::cmp::min(tx_buf.len(), buf.len());
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tx_buf[..n].copy_from_slice(&buf[..n]);
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state.tx.push(n);
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(Poll::Ready(Ok(n)), empty)
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});
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if empty {
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self.inner.pend();
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}
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poll
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})
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}
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type FlushFuture<'a> = impl Future<Output = Result<(), Self::Error>>
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where
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Self: 'a;
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fn flush<'a>(&'a mut self) -> Self::FlushFuture<'a> {
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poll_fn(move |cx| {
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self.inner.with(|state| {
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if !state.tx.is_empty() {
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state.tx_waker.register(cx.waker());
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return Poll::Pending;
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}
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Poll::Ready(Ok(()))
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})
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})
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}
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}
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@ -424,227 +424,10 @@ cfg_if::cfg_if! {
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}
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}
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#[cfg(feature = "nightly")]
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pub use buffered::*;
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mod buffered {
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use atomic_polyfill::{compiler_fence, Ordering};
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use core::pin::Pin;
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use core::task::Context;
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use core::task::Poll;
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use embassy::waitqueue::WakerRegistration;
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use embassy_hal_common::peripheral::{PeripheralMutex, PeripheralState, StateStorage};
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use embassy_hal_common::ring_buffer::RingBuffer;
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use super::*;
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pub struct State<'d, T: Instance>(StateStorage<StateInner<'d, T>>);
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impl<'d, T: Instance> State<'d, T> {
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pub fn new() -> Self {
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Self(StateStorage::new())
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}
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}
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struct StateInner<'d, T: Instance> {
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phantom: PhantomData<&'d mut T>,
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rx_waker: WakerRegistration,
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rx: RingBuffer<'d>,
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tx_waker: WakerRegistration,
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tx: RingBuffer<'d>,
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}
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unsafe impl<'d, T: Instance> Send for StateInner<'d, T> {}
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unsafe impl<'d, T: Instance> Sync for StateInner<'d, T> {}
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pub struct BufferedUart<'d, T: Instance> {
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inner: PeripheralMutex<'d, StateInner<'d, T>>,
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}
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impl<'d, T: Instance> Unpin for BufferedUart<'d, T> {}
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impl<'d, T: Instance> BufferedUart<'d, T> {
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pub unsafe fn new(
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state: &'d mut State<'d, T>,
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_uart: Uart<'d, T, NoDma, NoDma>,
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irq: impl Unborrow<Target = T::Interrupt> + 'd,
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tx_buffer: &'d mut [u8],
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rx_buffer: &'d mut [u8],
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) -> BufferedUart<'d, T> {
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unborrow!(irq);
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let r = T::regs();
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r.cr1().modify(|w| {
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w.set_rxneie(true);
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w.set_idleie(true);
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});
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Self {
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inner: PeripheralMutex::new_unchecked(irq, &mut state.0, move || StateInner {
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phantom: PhantomData,
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tx: RingBuffer::new(tx_buffer),
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tx_waker: WakerRegistration::new(),
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rx: RingBuffer::new(rx_buffer),
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rx_waker: WakerRegistration::new(),
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}),
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}
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}
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}
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impl<'d, T: Instance> StateInner<'d, T>
|
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where
|
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Self: 'd,
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{
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fn on_rx(&mut self) {
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let r = T::regs();
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unsafe {
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let sr = sr(r).read();
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clear_interrupt_flags(r, sr);
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|
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// This read also clears the error and idle interrupt flags on v1.
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let b = rdr(r).read_volatile();
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|
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if sr.rxne() {
|
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if sr.pe() {
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warn!("Parity error");
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}
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if sr.fe() {
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warn!("Framing error");
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}
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if sr.ne() {
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warn!("Noise error");
|
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}
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if sr.ore() {
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warn!("Overrun error");
|
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}
|
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let buf = self.rx.push_buf();
|
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if !buf.is_empty() {
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buf[0] = b;
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self.rx.push(1);
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} else {
|
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warn!("RX buffer full, discard received byte");
|
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}
|
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|
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if self.rx.is_full() {
|
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self.rx_waker.wake();
|
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}
|
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}
|
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|
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if sr.idle() {
|
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self.rx_waker.wake();
|
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};
|
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}
|
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}
|
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|
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fn on_tx(&mut self) {
|
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let r = T::regs();
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unsafe {
|
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if sr(r).read().txe() {
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let buf = self.tx.pop_buf();
|
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if !buf.is_empty() {
|
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r.cr1().modify(|w| {
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w.set_txeie(true);
|
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});
|
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tdr(r).write_volatile(buf[0].into());
|
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self.tx.pop(1);
|
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self.tx_waker.wake();
|
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} else {
|
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// Disable interrupt until we have something to transmit again
|
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r.cr1().modify(|w| {
|
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w.set_txeie(false);
|
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});
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
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}
|
||||
|
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impl<'d, T: Instance> PeripheralState for StateInner<'d, T>
|
||||
where
|
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Self: 'd,
|
||||
{
|
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type Interrupt = T::Interrupt;
|
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fn on_interrupt(&mut self) {
|
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self.on_rx();
|
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self.on_tx();
|
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}
|
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}
|
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|
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impl<'d, T: Instance> embassy::io::AsyncBufRead for BufferedUart<'d, T> {
|
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fn poll_fill_buf(
|
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mut self: Pin<&mut Self>,
|
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cx: &mut Context<'_>,
|
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) -> Poll<Result<&[u8], embassy::io::Error>> {
|
||||
self.inner.with(|state| {
|
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compiler_fence(Ordering::SeqCst);
|
||||
|
||||
// We have data ready in buffer? Return it.
|
||||
let buf = state.rx.pop_buf();
|
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if !buf.is_empty() {
|
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let buf: &[u8] = buf;
|
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// Safety: buffer lives as long as uart
|
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let buf: &[u8] = unsafe { core::mem::transmute(buf) };
|
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return Poll::Ready(Ok(buf));
|
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}
|
||||
|
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state.rx_waker.register(cx.waker());
|
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Poll::<Result<&[u8], embassy::io::Error>>::Pending
|
||||
})
|
||||
}
|
||||
fn consume(mut self: Pin<&mut Self>, amt: usize) {
|
||||
let signal = self.inner.with(|state| {
|
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let full = state.rx.is_full();
|
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state.rx.pop(amt);
|
||||
full
|
||||
});
|
||||
if signal {
|
||||
self.inner.pend();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'d, T: Instance> embassy::io::AsyncWrite for BufferedUart<'d, T> {
|
||||
fn poll_write(
|
||||
mut self: Pin<&mut Self>,
|
||||
cx: &mut Context<'_>,
|
||||
buf: &[u8],
|
||||
) -> Poll<Result<usize, embassy::io::Error>> {
|
||||
let (poll, empty) = self.inner.with(|state| {
|
||||
let empty = state.tx.is_empty();
|
||||
let tx_buf = state.tx.push_buf();
|
||||
if tx_buf.is_empty() {
|
||||
state.tx_waker.register(cx.waker());
|
||||
return (Poll::Pending, empty);
|
||||
}
|
||||
|
||||
let n = core::cmp::min(tx_buf.len(), buf.len());
|
||||
tx_buf[..n].copy_from_slice(&buf[..n]);
|
||||
state.tx.push(n);
|
||||
|
||||
(Poll::Ready(Ok(n)), empty)
|
||||
});
|
||||
if empty {
|
||||
self.inner.pend();
|
||||
}
|
||||
poll
|
||||
}
|
||||
|
||||
fn poll_flush(
|
||||
mut self: Pin<&mut Self>,
|
||||
cx: &mut Context<'_>,
|
||||
) -> Poll<Result<(), embassy::io::Error>> {
|
||||
self.inner.with(|state| {
|
||||
if !state.tx.is_empty() {
|
||||
state.tx_waker.register(cx.waker());
|
||||
return Poll::Pending;
|
||||
}
|
||||
|
||||
Poll::Ready(Ok(()))
|
||||
})
|
||||
}
|
||||
}
|
||||
}
|
||||
#[cfg(feature = "nightly")]
|
||||
mod buffered;
|
||||
|
||||
#[cfg(usart_v1)]
|
||||
fn tdr(r: crate::pac::usart::Usart) -> *mut u8 {
|
||||
@ -662,6 +445,7 @@ fn sr(r: crate::pac::usart::Usart) -> crate::pac::common::Reg<regs::Sr, crate::p
|
||||
}
|
||||
|
||||
#[cfg(usart_v1)]
|
||||
#[allow(unused)]
|
||||
unsafe fn clear_interrupt_flags(_r: crate::pac::usart::Usart, _sr: regs::Sr) {
|
||||
// On v1 the flags are cleared implicitly by reads and writes to DR.
|
||||
}
|
||||
@ -682,6 +466,7 @@ fn sr(r: crate::pac::usart::Usart) -> crate::pac::common::Reg<regs::Ixr, crate::
|
||||
}
|
||||
|
||||
#[cfg(usart_v2)]
|
||||
#[allow(unused)]
|
||||
unsafe fn clear_interrupt_flags(r: crate::pac::usart::Usart, sr: regs::Ixr) {
|
||||
r.icr().write(|w| *w = sr);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user