58 lines
1.4 KiB
Rust
58 lines
1.4 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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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::time::U32Ext;
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use embassy_traits::spi::FullDuplex;
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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::{DMA1_CH3, DMA1_CH4, SPI3};
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use embassy_stm32::spi;
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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, DMA1_CH3, DMA1_CH4>) {
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for n in 0u32.. {
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let mut write: String<128> = String::new();
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let mut read = [0; 128];
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core::write!(&mut write, "Hello DMA World {}!\r\n", n).unwrap();
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// read_write will slice the &mut read down to &write's actual length.
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spi.read_write(&mut read, write.as_bytes()).await.ok();
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info!("read via spi+dma: {}", from_utf8(&read).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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p.DMA1_CH3,
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p.DMA1_CH4,
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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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