1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::dma::NoDma;
use embassy_stm32::peripherals::{DMA1_CH1, UART7};
use embassy_stm32::usart::{Config, Uart, UartRx};
use embassy_sync::blocking_mutex::raw::ThreadModeRawMutex;
use embassy_sync::channel::mpmc::Channel;
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::task]
async fn writer(mut usart: Uart<'static, UART7, NoDma, NoDma>) {
unwrap!(usart.blocking_write(b"Hello Embassy World!\r\n"));
info!("wrote Hello, starting echo");
let mut buf = [0u8; 1];
loop {
unwrap!(usart.blocking_read(&mut buf));
unwrap!(usart.blocking_write(&buf));
}
}
static CHANNEL: Channel<ThreadModeRawMutex, [u8; 8], 1> = Channel::new();
#[embassy_executor::main]
async fn main(spawner: Spawner) -> ! {
let p = embassy_stm32::init(Default::default());
info!("Hello World!");
let config = Config::default();
let mut usart = Uart::new(p.UART7, p.PF6, p.PF7, p.DMA1_CH0, p.DMA1_CH1, config);
unwrap!(usart.blocking_write(b"Type 8 chars to echo!\r\n"));
let (mut tx, rx) = usart.split();
unwrap!(spawner.spawn(reader(rx)));
loop {
let buf = CHANNEL.recv().await;
info!("writing...");
unwrap!(tx.write(&buf).await);
}
}
#[embassy_executor::task]
async fn reader(mut rx: UartRx<'static, UART7, DMA1_CH1>) {
let mut buf = [0; 8];
loop {
info!("reading...");
unwrap!(rx.read(&mut buf).await);
CHANNEL.send(buf).await;
}
}
|
