57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::*;
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use embassy_executor::executor::Spawner;
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use embassy_stm32::dma::NoDma;
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use embassy_stm32::peripherals::{DMA1_CH1, UART7};
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use embassy_stm32::usart::{Config, Uart, UartRx};
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use embassy_stm32::Peripherals;
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use embassy_util::blocking_mutex::raw::ThreadModeRawMutex;
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use embassy_util::channel::mpmc::Channel;
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::task]
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async fn writer(mut usart: Uart<'static, UART7, NoDma, NoDma>) {
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unwrap!(usart.blocking_write(b"Hello Embassy World!\r\n"));
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info!("wrote Hello, starting echo");
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let mut buf = [0u8; 1];
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loop {
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unwrap!(usart.blocking_read(&mut buf));
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unwrap!(usart.blocking_write(&buf));
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}
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}
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static CHANNEL: Channel<ThreadModeRawMutex, [u8; 8], 1> = Channel::new();
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#[embassy_executor::main]
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async fn main(spawner: Spawner, p: Peripherals) -> ! {
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info!("Hello World!");
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let config = Config::default();
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let mut usart = Uart::new(p.UART7, p.PF6, p.PF7, p.DMA1_CH0, p.DMA1_CH1, config);
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unwrap!(usart.blocking_write(b"Type 8 chars to echo!\r\n"));
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let (mut tx, rx) = usart.split();
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unwrap!(spawner.spawn(reader(rx)));
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loop {
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let buf = CHANNEL.recv().await;
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info!("writing...");
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unwrap!(tx.write(&buf).await);
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}
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}
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#[embassy_executor::task]
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async fn reader(mut rx: UartRx<'static, UART7, DMA1_CH1>) {
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let mut buf = [0; 8];
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loop {
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info!("reading...");
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unwrap!(rx.read(&mut buf).await);
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CHANNEL.send(buf).await;
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}
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}
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