32 lines
910 B
Rust
32 lines
910 B
Rust
#![no_std]
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#![no_main]
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use core::fmt::Write;
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use core::str::from_utf8;
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::spi::{Config, Spi};
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use embassy_stm32::time::Hertz;
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use heapless::String;
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_stm32::init(Default::default());
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info!("Hello World!");
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let mut spi_config = Config::default();
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spi_config.frequency = Hertz(1_000_000);
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let mut spi = Spi::new(p.SPI1, p.PB3, p.PB5, p.PB4, p.DMA1_CH3, p.DMA1_CH2, spi_config);
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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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spi.transfer(&mut read[0..write.len()], 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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