embassy/examples/stm32wl/src/bin/uart_async.rs

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
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use embassy_stm32::usart::{Config, InterruptHandler, Uart};
use embassy_stm32::{bind_interrupts, peripherals};
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use {defmt_rtt as _, panic_probe as _};
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bind_interrupts!(struct Irqs{
USART1 => InterruptHandler<peripherals::USART1>;
LPUART1 => InterruptHandler<peripherals::LPUART1>;
});
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/*
Pass Incoming data from LPUART1 to USART1
Example is written for the LoRa-E5 mini v1.0,
but can be surely changed for your needs.
*/
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let mut config = embassy_stm32::Config::default();
config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE32;
let p = embassy_stm32::init(config);
defmt::info!("Starting system");
let mut config1 = Config::default();
config1.baudrate = 9600;
let mut config2 = Config::default();
config2.baudrate = 9600;
//RX/TX connected to USB/UART Bridge on LoRa-E5 mini v1.0
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let mut usart1 = Uart::new(p.USART1, p.PB7, p.PB6, Irqs, p.DMA1_CH3, p.DMA1_CH4, config1);
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//RX1/TX1 (LPUART) on LoRa-E5 mini v1.0
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let mut usart2 = Uart::new(p.LPUART1, p.PC0, p.PC1, Irqs, p.DMA1_CH5, p.DMA1_CH6, config2);
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unwrap!(usart1.write(b"Hello Embassy World!\r\n").await);
unwrap!(usart2.write(b"Hello Embassy World!\r\n").await);
let mut buf = [0u8; 300];
loop {
let result = usart2.read_until_idle(&mut buf).await;
match result {
Ok(size) => {
match usart1.write(&buf[0..size]).await {
Ok(()) => {
//Write suc.
}
Err(..) => {
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//Wasn't able to write
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}
}
}
Err(_err) => {
//Ignore eg. framing errors
}
}
}
}