examples/stm32l4/src/bin/i2c_blocking_async.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]

use defmt::*;
use embassy_embedded_hal::adapter::BlockingAsync;
use embassy_executor::executor::Spawner;
use embassy_stm32::dma::NoDma;
use embassy_stm32::i2c::I2c;
use embassy_stm32::interrupt;
use embassy_stm32::time::Hertz;
use embedded_hal_async::i2c::I2c as I2cTrait;
use {defmt_rtt as _, panic_probe as _};

const ADDRESS: u8 = 0x5F;
const WHOAMI: u8 = 0x0F;

#[embassy_executor::main]
async fn main(_spawner: Spawner) -> ! {
    let p = embassy_stm32::init(Default::default());
    let irq = interrupt::take!(I2C2_EV);
    let i2c = I2c::new(
        p.I2C2,
        p.PB10,
        p.PB11,
        irq,
        NoDma,
        NoDma,
        Hertz(100_000),
        Default::default(),
    );
    let mut i2c = BlockingAsync::new(i2c);

    let mut data = [0u8; 1];
    unwrap!(i2c.write_read(ADDRESS, &[WHOAMI], &mut data).await);
    info!("Whoami: {}", data[0]);
}