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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use core::fmt::Write;
use core::str::from_utf8;
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::spi::{Config, Spi};
use embassy_stm32::time::Hertz;
use heapless::String;
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_stm32::init(Default::default());
info!("Hello World!");
let mut spi = Spi::new(
p.SPI1,
p.PB3,
p.PB5,
p.PB4,
p.DMA1_CH3,
p.DMA1_CH2,
Hertz(1_000_000),
Config::default(),
);
for n in 0u32.. {
let mut write: String<128> = String::new();
let mut read = [0; 128];
core::write!(&mut write, "Hello DMA World {}!\r\n", n).unwrap();
spi.transfer(&mut read[0..write.len()], write.as_bytes()).await.ok();
info!("read via spi+dma: {}", from_utf8(&read).unwrap());
}
}
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