#![no_std] #![no_main] #![feature(type_alias_impl_trait)] use defmt::*; use embassy_executor::Spawner; use embassy_stm32::usart::{BufferedUart, Config}; use embassy_stm32::{bind_interrupts, peripherals, usart}; use embedded_io::asynch::{Read, Write}; use {defmt_rtt as _, panic_probe as _}; bind_interrupts!(struct Irqs { USART2 => usart::BufferedInterruptHandler; }); #[embassy_executor::main] async fn main(_spawner: Spawner) { let p = embassy_stm32::init(Default::default()); 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 mut usart = unsafe { BufferedUart::new(p.USART2, Irqs, p.PA3, p.PA2, &mut TX_BUFFER, &mut RX_BUFFER, config) }; 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(); } }