64 lines
1.4 KiB
Rust
64 lines
1.4 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(trait_alias)]
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#![feature(type_alias_impl_trait)]
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#![allow(incomplete_features)]
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#[path = "../example_common.rs"]
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mod example_common;
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use core::fmt::Write;
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use embassy::executor::Executor;
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use embassy::util::Forever;
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use embassy_stm32::dma::NoDma;
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use embassy_stm32::spi;
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use embedded_hal::blocking::spi::Transfer;
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use example_common::*;
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use core::str::from_utf8;
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use cortex_m_rt::entry;
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use embassy_stm32::peripherals::SPI3;
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use embassy_stm32::time::U32Ext;
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use heapless::String;
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#[embassy::task]
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async fn main_task(mut spi: spi::Spi<'static, SPI3, NoDma, NoDma>) {
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for n in 0u32.. {
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let mut write: String<128> = String::new();
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core::write!(&mut write, "Hello DMA World {}!\r\n", n).unwrap();
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unsafe {
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let result = spi.transfer(write.as_bytes_mut());
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if let Err(_) = result {
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defmt::panic!("crap");
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}
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}
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info!("read via spi: {}", from_utf8(write.as_bytes()).unwrap());
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}
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}
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static EXECUTOR: Forever<Executor> = Forever::new();
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#[entry]
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fn main() -> ! {
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info!("Hello World!");
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let p = embassy_stm32::init(config());
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let spi = spi::Spi::new(
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p.SPI3,
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p.PB3,
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p.PB5,
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p.PB4,
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NoDma,
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NoDma,
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1.mhz(),
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spi::Config::default(),
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);
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let executor = EXECUTOR.put(Executor::new());
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executor.run(|spawner| {
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unwrap!(spawner.spawn(main_task(spi)));
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})
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}
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