embassy/examples/stm32l4/src/bin/i2c.rs

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
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use embassy_stm32::dma::NoDma;
use embassy_stm32::i2c::I2c;
use embassy_stm32::interrupt;
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use embassy_stm32::time::Hertz;
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use {defmt_rtt as _, panic_probe as _};
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const ADDRESS: u8 = 0x5F;
const WHOAMI: u8 = 0x0F;
#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
let p = embassy_stm32::init(Default::default());
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let irq = interrupt::take!(I2C2_EV);
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let mut i2c = I2c::new(
p.I2C2,
p.PB10,
p.PB11,
irq,
NoDma,
NoDma,
Hertz(100_000),
Default::default(),
);
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let mut data = [0u8; 1];
unwrap!(i2c.blocking_write_read(ADDRESS, &[WHOAMI], &mut data));
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info!("Whoami: {}", data[0]);
}