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