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Merge #987

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987: (embassy-stm32): uart flowcontrol r=Dirbaio a=MathiasKoch

Add RTS & CTS flow control to stm32 UARTs

Co-authored-by: Mathias <mk@blackbird.online>
This commit is contained in:
bors[bot] 2022-10-26 10:18:44 +00:00 committed by GitHub
commit 1b249ca72d
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1 changed files with 39 additions and 2 deletions
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41
embassy-stm32/src/usart/mod.rs
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@ -222,10 +222,48 @@ impl<'d, T: BasicInstance, TxDma, RxDma> Uart<'d, T, TxDma, RxDma> {
rx_dma: impl Peripheral<P = RxDma> + 'd,
config: Config,
) -> Self {
into_ref!(_inner, rx, tx, tx_dma, rx_dma);
T::enable();
T::reset();
Self::new_inner(_inner, rx, tx, tx_dma, rx_dma, config)
}
pub fn new_with_rtscts(
_inner: impl Peripheral<P = T> + 'd,
rx: impl Peripheral<P = impl RxPin<T>> + 'd,
tx: impl Peripheral<P = impl TxPin<T>> + 'd,
rts: impl Peripheral<P = impl RtsPin<T>> + 'd,
cts: impl Peripheral<P = impl CtsPin<T>> + 'd,
tx_dma: impl Peripheral<P = TxDma> + 'd,
rx_dma: impl Peripheral<P = RxDma> + 'd,
config: Config,
) -> Self {
into_ref!(cts, rts);
T::enable();
T::reset();
unsafe {
rts.set_as_af(rts.af_num(), AFType::OutputPushPull);
cts.set_as_af(cts.af_num(), AFType::Input);
T::regs().cr3().write(|w| {
w.set_rtse(true);
w.set_ctse(true);
});
}
Self::new_inner(_inner, rx, tx, tx_dma, rx_dma, config)
}
fn new_inner(
_inner: impl Peripheral<P = T> + 'd,
rx: impl Peripheral<P = impl RxPin<T>> + 'd,
tx: impl Peripheral<P = impl TxPin<T>> + 'd,
tx_dma: impl Peripheral<P = TxDma> + 'd,
rx_dma: impl Peripheral<P = RxDma> + 'd,
config: Config,
) -> Self {
into_ref!(_inner, rx, tx, tx_dma, rx_dma);
let pclk_freq = T::frequency();
// TODO: better calculation, including error checking and OVER8 if possible.
@ -238,7 +276,6 @@ impl<'d, T: BasicInstance, TxDma, RxDma> Uart<'d, T, TxDma, RxDma> {
tx.set_as_af(tx.af_num(), AFType::OutputPushPull);
r.cr2().write(|_w| {});
r.cr3().write(|_w| {});
r.brr().write_value(regs::Brr(div));
r.cr1().write(|w| {
w.set_ue(true);