embassy/examples/stm32h7/src/bin/usart_dma.rs
2022-04-02 04:35:06 +02:00

46 lines
1014 B
Rust

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use core::fmt::Write;
use defmt::*;
use defmt_rtt as _; // global logger
use embassy::executor::Executor;
use embassy::util::Forever;
use embassy_stm32::dma::NoDma;
use embassy_stm32::usart::{Config, Uart};
use panic_probe as _;
use cortex_m_rt::entry;
use heapless::String;
#[embassy::task]
async fn main_task() {
let p = embassy_stm32::init(Default::default());
let config = Config::default();
let mut usart = Uart::new(p.UART7, p.PF6, p.PF7, p.DMA1_CH0, NoDma, config);
for n in 0u32.. {
let mut s: String<128> = String::new();
core::write!(&mut s, "Hello DMA World {}!\r\n", n).unwrap();
usart.write(s.as_bytes()).await.ok();
info!("wrote DMA");
}
}
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()));
})
}