57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
#![no_std]
|
|
#![no_main]
|
|
#![feature(type_alias_impl_trait)]
|
|
|
|
use core::fmt::Write;
|
|
use core::str::from_utf8;
|
|
|
|
use cortex_m_rt::entry;
|
|
use defmt::*;
|
|
use embassy_executor::Executor;
|
|
use embassy_stm32::dma::NoDma;
|
|
use embassy_stm32::peripherals::SPI3;
|
|
use embassy_stm32::time::mhz;
|
|
use embassy_stm32::{spi, Config};
|
|
use heapless::String;
|
|
use static_cell::StaticCell;
|
|
use {defmt_rtt as _, panic_probe as _};
|
|
|
|
#[embassy_executor::task]
|
|
async fn main_task(mut spi: spi::Spi<'static, SPI3, NoDma, NoDma>) {
|
|
for n in 0u32.. {
|
|
let mut write: String<128> = String::new();
|
|
core::write!(&mut write, "Hello DMA World {}!\r\n", n).unwrap();
|
|
unsafe {
|
|
let result = spi.blocking_transfer_in_place(write.as_bytes_mut());
|
|
if let Err(_) = result {
|
|
defmt::panic!("crap");
|
|
}
|
|
}
|
|
info!("read via spi: {}", from_utf8(write.as_bytes()).unwrap());
|
|
}
|
|
}
|
|
|
|
static EXECUTOR: StaticCell<Executor> = StaticCell::new();
|
|
|
|
#[entry]
|
|
fn main() -> ! {
|
|
info!("Hello World!");
|
|
|
|
let mut config = Config::default();
|
|
config.rcc.sys_ck = Some(mhz(400));
|
|
config.rcc.hclk = Some(mhz(200));
|
|
config.rcc.pll1.q_ck = Some(mhz(100));
|
|
let p = embassy_stm32::init(config);
|
|
|
|
let mut spi_config = spi::Config::default();
|
|
spi_config.frequency = mhz(1);
|
|
|
|
let spi = spi::Spi::new(p.SPI3, p.PB3, p.PB5, p.PB4, NoDma, NoDma, spi_config);
|
|
|
|
let executor = EXECUTOR.init(Executor::new());
|
|
|
|
executor.run(|spawner| {
|
|
unwrap!(spawner.spawn(main_task(spi)));
|
|
})
|
|
}
|