embassy/examples/stm32h7/src/bin/usart.rs

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use defmt_rtt as _; // global logger
use embassy::executor::Executor;
use embassy::util::Forever;
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use embassy_stm32::dma::NoDma;
use embassy_stm32::usart::{Config, Uart};
use panic_probe as _;
use cortex_m_rt::entry;
#[embassy::task]
async fn main_task() {
let p = embassy_stm32::init(Default::default());
let config = Config::default();
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let mut usart = Uart::new(p.UART7, p.PF6, p.PF7, NoDma, NoDma, config);
unwrap!(usart.blocking_write(b"Hello Embassy World!\r\n"));
info!("wrote Hello, starting echo");
let mut buf = [0u8; 1];
loop {
unwrap!(usart.blocking_read(&mut buf));
unwrap!(usart.blocking_write(&buf));
}
}
static EXECUTOR: Forever<Executor> = Forever::new();
#[entry]
fn main() -> ! {
info!("Hello World!");
let executor = EXECUTOR.put(Executor::new());
executor.run(|spawner| {
unwrap!(spawner.spawn(main_task()));
})
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}