33 lines
945 B
Rust
33 lines
945 B
Rust
#![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_config = Config::default();
|
|
spi_config.frequency = Hertz(1_000_000);
|
|
|
|
let mut spi = Spi::new(p.SPI1, p.PB3, p.PB5, p.PB4, p.DMA1_CH3, p.DMA1_CH2, spi_config);
|
|
|
|
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());
|
|
}
|
|
}
|