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stm32/spi: Clear rx fifo in blocking methods

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This commit is contained in:
Grant Miller 2022-03-14 21:55:37 -05:00
parent ff1215c6f9
commit 49ef19c0b2
1 changed files with 4 additions and 1 deletions
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embassy-stm32/src/spi/mod.rs
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@ -575,6 +575,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_write<W: Word>(&mut self, words: &[W]) -> Result<(), Error> {
flush_rx_fifo(T::REGS);
self.set_word_size(W::WORDSIZE);
for word in words.iter() {
let _ = transfer_word(T::REGS, *word)?;
@ -583,6 +584,7 @@ impl<'d, T: Instance, Tx, Rx> Spi<'d, T, Tx, Rx> {
}
pub fn blocking_read<W: Word>(&mut self, words: &mut [W]) -> Result<(), Error> {
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 +593,7 @@ 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> {
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 +602,7 @@ 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> {
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 +731,6 @@ fn spin_until_rx_ready(regs: Regs) -> Result<(), Error> {
}
}
#[cfg(not(spi_v3))]
fn flush_rx_fifo(regs: Regs) {
unsafe {
#[cfg(not(spi_v3))]