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Merge pull request #4406 from chemicstry/stm32_bufuart_hd

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Fix stm32 buffered half-duplex uart receive
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Dario Nieuwenhuis 2025-07-16 18:13:11 +00:00 committed by GitHub
commit 5c1d1d3766
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2 changed files with 3 additions and 1 deletions
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2
embassy-stm32/src/usart/buffered.rs
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@ -87,6 +87,8 @@ unsafe fn on_interrupt(r: Regs, state: &'static State) {
r.cr1().modify(|w| { r.cr1().modify(|w| {
w.set_tcie(false); w.set_tcie(false);
// Reenable receiver for half-duplex if it was disabled
w.set_re(true);
}); });
state.tx_done.store(true, Ordering::Release); state.tx_done.store(true, Ordering::Release);

2
embassy-stm32/src/usart/mod.rs
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@ -651,7 +651,7 @@ pub fn send_break(regs: &Regs) {
/// In case of readback, keep Receiver enabled /// In case of readback, keep Receiver enabled
fn half_duplex_set_rx_tx_before_write(r: &Regs, enable_readback: bool) { fn half_duplex_set_rx_tx_before_write(r: &Regs, enable_readback: bool) {
let mut cr1 = r.cr1().read(); let mut cr1 = r.cr1().read();
if r.cr3().read().hdsel() && !cr1.te() { if r.cr3().read().hdsel() {
cr1.set_te(true); cr1.set_te(true);
cr1.set_re(enable_readback); cr1.set_re(enable_readback);
r.cr1().write_value(cr1); r.cr1().write_value(cr1);