embassy/examples/stm32f3/src/bin/usart_dma.rs

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use core::fmt::Write;
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use defmt::*;
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use embassy::executor::Spawner;
use embassy_stm32::dma::NoDma;
use embassy_stm32::usart::{Config, Uart};
use embassy_stm32::Peripherals;
use heapless::String;
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use {defmt_rtt as _, panic_probe as _};
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#[embassy::main]
async fn main(_spawner: Spawner, p: Peripherals) {
info!("Hello World!");
let config = Config::default();
let mut usart = Uart::new(p.USART1, p.PE1, p.PE0, p.DMA1_CH4, NoDma, config);
for n in 0u32.. {
let mut s: String<128> = String::new();
core::write!(&mut s, "Hello DMA World {}!\r\n", n).unwrap();
unwrap!(usart.write(s.as_bytes()).await);
info!("wrote DMA");
}
}