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fix: BufferedUartRx embedded_hal_nb::serial::Read impl

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This commit is contained in:
Maximilian Rozwora 2025-02-24 14:34:41 +01:00
parent f3b98a8748
commit 76756ee702
1 changed files with 9 additions and 19 deletions
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26
embassy-stm32/src/usart/buffered.rs
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@ -908,26 +908,16 @@ impl<'d> embedded_hal_02::serial::Read<u8> for BufferedUartRx<'d> {
type Error = Error;
fn read(&mut self) -> Result<u8, nb::Error<Self::Error>> {
let r = self.info.regs;
unsafe {
let sr = sr(r).read();
if sr.pe() {
rdr(r).read_volatile();
Err(nb::Error::Other(Error::Parity))
} else if sr.fe() {
rdr(r).read_volatile();
Err(nb::Error::Other(Error::Framing))
} else if sr.ne() {
rdr(r).read_volatile();
Err(nb::Error::Other(Error::Noise))
} else if sr.ore() {
rdr(r).read_volatile();
Err(nb::Error::Other(Error::Overrun))
} else if sr.rxne() {
Ok(rdr(r).read_volatile())
let state = self.state;
let mut rx_reader = unsafe { state.rx_buf.reader() };
if let Some(data) = rx_reader.pop_one() {
Ok(data)
} else {
Err(nb::Error::WouldBlock)
if state.rx_buf.is_full() {
self.info.interrupt.pend();
}
Err(nb::Error::WouldBlock)
}
}
}