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stm32: can:fd: merge read impls; buffered RX returns Result<_, BusError>

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Torin Cooper-Bennun 2024-03-04 12:22:59 +00:00
parent 72c6cdc5d5
commit e0018c6f4f
1 changed files with 37 additions and 28 deletions
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65
embassy-stm32/src/can/fdcan.rs
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@ -398,7 +398,8 @@ impl<'d, T: Instance> Fdcan<'d, T> {
}
/// User supplied buffer for RX Buffering
pub type RxBuf<const BUF_SIZE: usize> = Channel<CriticalSectionRawMutex, (ClassicFrame, Timestamp), BUF_SIZE>;
pub type RxBuf<const BUF_SIZE: usize> =
Channel<CriticalSectionRawMutex, Result<(ClassicFrame, Timestamp), BusError>, BUF_SIZE>;
/// User supplied buffer for TX buffering
pub type TxBuf<const BUF_SIZE: usize> = Channel<CriticalSectionRawMutex, ClassicFrame, BUF_SIZE>;
@ -440,7 +441,8 @@ impl BufferedCanSender {
}
/// Receiver that can be used for receiving CAN frames. Note, each CAN frame will only be received by one receiver.
pub type BufferedCanReceiver = embassy_sync::channel::DynamicReceiver<'static, (ClassicFrame, Timestamp)>;
pub type BufferedCanReceiver =
embassy_sync::channel::DynamicReceiver<'static, Result<(ClassicFrame, Timestamp), BusError>>;
impl<'c, 'd, T: Instance, const TX_BUF_SIZE: usize, const RX_BUF_SIZE: usize>
BufferedCan<'d, T, TX_BUF_SIZE, RX_BUF_SIZE>
@ -485,7 +487,7 @@ impl<'c, 'd, T: Instance, const TX_BUF_SIZE: usize, const RX_BUF_SIZE: usize>
/// Async read frame from RX buffer.
pub async fn read(&mut self) -> Result<(ClassicFrame, Timestamp), BusError> {
Ok(self.rx_buf.receive().await)
self.rx_buf.receive().await
}
/// Returns a sender that can be used for sending CAN frames.
@ -514,7 +516,8 @@ impl<'c, 'd, T: Instance, const TX_BUF_SIZE: usize, const RX_BUF_SIZE: usize> Dr
}
/// User supplied buffer for RX Buffering
pub type RxFdBuf<const BUF_SIZE: usize> = Channel<CriticalSectionRawMutex, (FdFrame, Timestamp), BUF_SIZE>;
pub type RxFdBuf<const BUF_SIZE: usize> =
Channel<CriticalSectionRawMutex, Result<(FdFrame, Timestamp), BusError>, BUF_SIZE>;
/// User supplied buffer for TX buffering
pub type TxFdBuf<const BUF_SIZE: usize> = Channel<CriticalSectionRawMutex, FdFrame, BUF_SIZE>;
@ -556,7 +559,8 @@ impl BufferedFdCanSender {
}
/// Receiver that can be used for receiving CAN frames. Note, each CAN frame will only be received by one receiver.
pub type BufferedFdCanReceiver = embassy_sync::channel::DynamicReceiver<'static, (FdFrame, Timestamp)>;
pub type BufferedFdCanReceiver =
embassy_sync::channel::DynamicReceiver<'static, Result<(FdFrame, Timestamp), BusError>>;
impl<'c, 'd, T: Instance, const TX_BUF_SIZE: usize, const RX_BUF_SIZE: usize>
BufferedCanFd<'d, T, TX_BUF_SIZE, RX_BUF_SIZE>
@ -601,7 +605,7 @@ impl<'c, 'd, T: Instance, const TX_BUF_SIZE: usize, const RX_BUF_SIZE: usize>
/// Async read frame from RX buffer.
pub async fn read(&mut self) -> Result<(FdFrame, Timestamp), BusError> {
Ok(self.rx_buf.receive().await)
self.rx_buf.receive().await
}
/// Returns a sender that can be used for sending CAN frames.
@ -685,14 +689,14 @@ pub(crate) mod sealed {
use crate::can::frame::{ClassicFrame, FdFrame};
pub struct ClassicBufferedRxInner {
pub rx_sender: DynamicSender<'static, (ClassicFrame, Timestamp)>,
pub rx_sender: DynamicSender<'static, Result<(ClassicFrame, Timestamp), BusError>>,
}
pub struct ClassicBufferedTxInner {
pub tx_receiver: DynamicReceiver<'static, ClassicFrame>,
}
pub struct FdBufferedRxInner {
pub rx_sender: DynamicSender<'static, (FdFrame, Timestamp)>,
pub rx_sender: DynamicSender<'static, Result<(FdFrame, Timestamp), BusError>>,
}
pub struct FdBufferedTxInner {
pub tx_receiver: DynamicReceiver<'static, FdFrame>,
@ -721,46 +725,51 @@ pub(crate) mod sealed {
waker.wake();
}
RxMode::ClassicBuffered(buf) => {
if let Some(r) = T::registers().read(fifonr) {
let ts = T::calc_timestamp(T::state().ns_per_timer_tick, r.1);
let _ = buf.rx_sender.try_send((r.0, ts));
if let Some(result) = self.read::<T, _>() {
let _ = buf.rx_sender.try_send(result);
}
}
RxMode::FdBuffered(buf) => {
if let Some(r) = T::registers().read(fifonr) {
let ts = T::calc_timestamp(T::state().ns_per_timer_tick, r.1);
let _ = buf.rx_sender.try_send((r.0, ts));
if let Some(result) = self.read::<T, _>() {
let _ = buf.rx_sender.try_send(result);
}
}
}
}
async fn read<T: Instance, F: CanHeader>(&self) -> Result<(F, Timestamp), BusError> {
fn read<T: Instance, F: CanHeader>(&self) -> Option<Result<(F, Timestamp), BusError>> {
if let Some((msg, ts)) = T::registers().read(0) {
let ts = T::calc_timestamp(T::state().ns_per_timer_tick, ts);
Some(Ok((msg, ts)))
} else if let Some((msg, ts)) = T::registers().read(1) {
let ts = T::calc_timestamp(T::state().ns_per_timer_tick, ts);
Some(Ok((msg, ts)))
} else if let Some(err) = T::registers().curr_error() {
// TODO: this is probably wrong
Some(Err(err))
} else {
None
}
}
async fn read_async<T: Instance, F: CanHeader>(&self) -> Result<(F, Timestamp), BusError> {
poll_fn(|cx| {
T::state().err_waker.register(cx.waker());
self.register(cx.waker());
if let Some((msg, ts)) = T::registers().read(0) {
let ts = T::calc_timestamp(T::state().ns_per_timer_tick, ts);
return Poll::Ready(Ok((msg, ts)));
} else if let Some((msg, ts)) = T::registers().read(1) {
let ts = T::calc_timestamp(T::state().ns_per_timer_tick, ts);
return Poll::Ready(Ok((msg, ts)));
} else if let Some(err) = T::registers().curr_error() {
// TODO: this is probably wrong
return Poll::Ready(Err(err));
match self.read::<T, _>() {
Some(result) => Poll::Ready(result),
None => Poll::Pending,
}
Poll::Pending
})
.await
}
pub async fn read_classic<T: Instance>(&self) -> Result<(ClassicFrame, Timestamp), BusError> {
self.read::<T, _>().await
self.read_async::<T, _>().await
}
pub async fn read_fd<T: Instance>(&self) -> Result<(FdFrame, Timestamp), BusError> {
self.read::<T, _>().await
self.read_async::<T, _>().await
}
}