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Merge #440

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440: Add i2c example for L4 r=Dirbaio a=lulf

Tested to work on STM32 IOT01A  (STM32L475VG) board.

Co-authored-by: Ulf Lilleengen <ulf.lilleengen@gmail.com>
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bors[bot] 2021-10-20 11:34:18 +00:00 committed by GitHub
commit acce0f1d25
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examples/stm32l4/src/bin/i2c.rs Normal file
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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
#[path = "../example_common.rs"]
mod example_common;
use embassy::executor::Spawner;
use embassy_stm32::dma::NoDma;
use embassy_stm32::i2c::I2c;
use embassy_stm32::interrupt;
use embassy_stm32::time::Hertz;
use embassy_stm32::Peripherals;
use embedded_hal::blocking::i2c::WriteRead;
use example_common::{info, unwrap};
const ADDRESS: u8 = 0x5F;
const WHOAMI: u8 = 0x0F;
#[embassy::main]
async fn main(_spawner: Spawner, p: Peripherals) -> ! {
let irq = interrupt::take!(I2C2_EV);
let mut i2c = I2c::new(p.I2C2, p.PB10, p.PB11, irq, NoDma, NoDma, Hertz(100_000));
let mut data = [0u8; 1];
unwrap!(i2c.write_read(ADDRESS, &[WHOAMI], &mut data));
info!("Whoami: {}", data[0]);
}