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Merge #1192 #1193

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1192: stm32/usart: implement stop_bits configuration r=Dirbaio a=pattop



1193: stm32/usart: fix LPUART clock multiplier r=Dirbaio a=pattop

According to RM0351 Rev 9 (L4) and RM0399 Rev 3 (H7):

baud = (256 * clock) / LPUARTDIV


Co-authored-by: Patrick Oppenlander <patrick.oppenlander@gmail.com>
This commit is contained in:
bors[bot]
2023-02-06 13:39:37 +00:00
committed by GitHub
parent 7d8e6649b7 64ebb9b7fe fda36fd81b
commit c8a7b74bc2
1 changed files with 9 additions and 2 deletions
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11
embassy-stm32/src/usart/mod.rs
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@@ -770,7 +770,14 @@ fn configure(r: Regs, config: &Config, pclk_freq: Hertz, multiplier: u32, enable
unsafe { unsafe {
r.brr().write_value(regs::Brr(div)); r.brr().write_value(regs::Brr(div));
r.cr2().write(|_w| {}); r.cr2().write(|w| {
w.set_stop(match config.stop_bits {
StopBits::STOP0P5 => vals::Stop::STOP0P5,
StopBits::STOP1 => vals::Stop::STOP1,
StopBits::STOP1P5 => vals::Stop::STOP1P5,
StopBits::STOP2 => vals::Stop::STOP2,
});
});
r.cr1().write(|w| { r.cr1().write(|w| {
// enable uart // enable uart
w.set_ue(true); w.set_ue(true);
@@ -1148,7 +1155,7 @@ macro_rules! impl_lpuart {
foreach_interrupt!( foreach_interrupt!(
($inst:ident, lpuart, $block:ident, $signal_name:ident, $irq:ident) => { ($inst:ident, lpuart, $block:ident, $signal_name:ident, $irq:ident) => {
impl_lpuart!($inst, $irq, 255); impl_lpuart!($inst, $irq, 256);
}; };
($inst:ident, usart, $block:ident, $signal_name:ident, $irq:ident) => { ($inst:ident, usart, $block:ident, $signal_name:ident, $irq:ident) => {