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implement changes

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This commit is contained in:
xoviat 2021-01-13 17:40:32 -06:00
parent c07f7467a0
commit 7adf99eff3
1 changed files with 1 additions and 9 deletions
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10
embassy-stm32f4/src/serial.rs
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@ -144,14 +144,10 @@ impl Uart for Serial<USART1, Stream7<DMA2>, Stream2<DMA2>> {
type ReceiveFuture<'a> = impl Future<Output = Result<(), Error>> + 'a; type ReceiveFuture<'a> = impl Future<Output = Result<(), Error>> + 'a;
/// Sends serial data. /// Sends serial data.
///
/// `tx_buffer` is marked as static as per `embedded-dma` requirements.
/// It it safe to use a buffer with a non static lifetime if memory is not
/// reused until the future has finished.
#[allow(mutable_transmutes)]
fn send<'a>(&'a mut self, buf: &'a [u8]) -> Self::SendFuture<'a> { fn send<'a>(&'a mut self, buf: &'a [u8]) -> Self::SendFuture<'a> {
unsafe { INSTANCE = self }; unsafe { INSTANCE = self };
#[allow(mutable_transmutes)]
let static_buf = unsafe { core::mem::transmute::<&'a [u8], &'static mut [u8]>(buf) }; let static_buf = unsafe { core::mem::transmute::<&'a [u8], &'static mut [u8]>(buf) };
let tx_stream = self.tx_stream.take().unwrap(); let tx_stream = self.tx_stream.take().unwrap();
@ -190,10 +186,6 @@ impl Uart for Serial<USART1, Stream7<DMA2>, Stream2<DMA2>> {
/// A common pattern is to use [`stop()`](ReceiveFuture::stop) to cancel /// A common pattern is to use [`stop()`](ReceiveFuture::stop) to cancel
/// unfinished transfers after a timeout to prevent lockup when no more data /// unfinished transfers after a timeout to prevent lockup when no more data
/// is incoming. /// is incoming.
///
/// `rx_buffer` is marked as static as per `embedded-dma` requirements.
/// It it safe to use a buffer with a non static lifetime if memory is not
/// reused until the future has finished.
fn receive<'a>(&'a mut self, buf: &'a mut [u8]) -> Self::ReceiveFuture<'a> { fn receive<'a>(&'a mut self, buf: &'a mut [u8]) -> Self::ReceiveFuture<'a> {
unsafe { INSTANCE = self }; unsafe { INSTANCE = self };