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Merge #666

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666: stm32/spi: Clear rx fifo in blocking methods r=Dirbaio a=GrantM11235



Co-authored-by: Grant Miller <GrantM11235@gmail.com>
Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>
This commit is contained in:
bors[bot] 2022-03-15 03:14:07 +00:00 committed by GitHub
commit cb1be3983a
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 24 additions and 1 deletions
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9
embassy-stm32/src/spi/mod.rs
View File

@ -575,6 +575,8 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_write<W: Word>(&mut self, words: &[W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
flush_rx_fifo(T::REGS);
self.set_word_size(W::WORDSIZE);
for word in words.iter() {
let _ = transfer_word(T::REGS, *word)?;
@ -583,6 +585,8 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_read<W: Word>(&mut self, words: &mut [W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
flush_rx_fifo(T::REGS);
self.set_word_size(W::WORDSIZE);
for word in words.iter_mut() {
*word = transfer_word(T::REGS, W::default())?;
@ -591,6 +595,8 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_transfer_in_place<W: Word>(&mut self, words: &mut [W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
flush_rx_fifo(T::REGS);
self.set_word_size(W::WORDSIZE);
for word in words.iter_mut() {
*word = transfer_word(T::REGS, *word)?;
@ -599,6 +605,8 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_transfer<W: Word>(&mut self, read: &mut [W], write: &[W]) -> Result<(), Error> {
unsafe { T::REGS.cr1().modify(|w| w.set_spe(true)) }
flush_rx_fifo(T::REGS);
self.set_word_size(W::WORDSIZE);
let len = read.len().max(write.len());
for i in 0..len {
@ -727,7 +735,6 @@ fn spin_until_rx_ready(regs: Regs) -> Result<(), Error> {
}
}
#[cfg(not(spi_v3))]
fn flush_rx_fifo(regs: Regs) {
unsafe {
#[cfg(not(spi_v3))]

16
tests/stm32/src/bin/spi_dma.rs
View File

@ -68,6 +68,22 @@ async fn main(_spawner: Spawner, p: Peripherals) {
spi.read::<u8>(&mut []).await.unwrap();
spi.write::<u8>(&[]).await.unwrap();
// === Check mixing blocking with async.
spi.blocking_transfer(&mut buf, &data).unwrap();
assert_eq!(buf, data);
spi.transfer(&mut buf, &data).await.unwrap();
assert_eq!(buf, data);
spi.blocking_write(&buf).unwrap();
spi.transfer(&mut buf, &data).await.unwrap();
assert_eq!(buf, data);
spi.blocking_read(&mut buf).unwrap();
spi.blocking_write(&buf).unwrap();
spi.write(&buf).await.unwrap();
spi.read(&mut buf).await.unwrap();
spi.blocking_write(&buf).unwrap();
spi.blocking_read(&mut buf).unwrap();
spi.write(&buf).await.unwrap();
info!("Test OK");
cortex_m::asm::bkpt();
}