45 lines
1.2 KiB
Rust
45 lines
1.2 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::Spawner;
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use embassy_stm32::dma::NoDma;
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use embassy_stm32::interrupt;
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use embassy_stm32::usart::{BufferedUart, Config, State, Uart};
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use embedded_io::asynch::{Read, Write};
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_stm32::init(Default::default());
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info!("Hi!");
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static mut TX_BUFFER: [u8; 8] = [0; 8];
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static mut RX_BUFFER: [u8; 256] = [0; 256];
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let mut config = Config::default();
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config.baudrate = 9600;
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let usart = Uart::new(p.USART2, p.PA3, p.PA2, NoDma, NoDma, config);
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let mut state = State::new();
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let mut usart = unsafe {
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BufferedUart::new(
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&mut state,
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usart,
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interrupt::take!(USART2),
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&mut TX_BUFFER,
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&mut RX_BUFFER,
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)
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};
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usart.write_all(b"Hello Embassy World!\r\n").await.unwrap();
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info!("wrote Hello, starting echo");
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let mut buf = [0; 4];
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loop {
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usart.read_exact(&mut buf[..]).await.unwrap();
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usart.write_all(&buf[..]).await.unwrap();
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}
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}
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