stm32u5: uart read_until_idle() has a mistake #4689
Description
Description
When I tried the serial loopback test, I sent '1', '2', '3', '4' in sequence. The data returned from the serial port had issues, as same as the defmt log. As shown in the figure below.
Envirenment
- os: macos
- board: stm32u545re-nucleo
- firmware-software: embassy + defmt_rtt
- host-software: probe-rs, SerialStudio and picocom
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::{
bind_interrupts, peripherals,
usart::{self, Config, Uart},
};
use {defmt_rtt as _, panic_probe as _};
bind_interrupts!(struct Irqs{
USART1 => usart::InterruptHandler<peripherals::USART1>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) -> ! {
let p = embassy_stm32::init(Default::default());
info!("Hello World!");
let config = Config::default();
let mut uart = Uart::new(
p.USART1,
p.PA10,
p.PA9,
Irqs,
p.GPDMA1_CH0,
p.GPDMA1_CH1,
config,
)
.unwrap();
let mut buffer = [0u8; 32];
loop {
if let Ok(len) = uart.read_until_idle(&mut buffer).await {
info!("{}", &buffer[0..len]);
uart.write(&buffer[0..len]).await.unwrap()
}
}
}