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Merge pull request #2594 from exzachlyvv/zvv/u5-i2c

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Add simple i2c example for u5
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Dario Nieuwenhuis 2024-02-18 22:35:18 +00:00 committed by GitHub
commit 69bfcaad42
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examples/stm32u5/src/bin/i2c.rs Normal file
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#![no_std]
#![no_main]
use defmt::{info, unwrap};
use embassy_executor::Spawner;
use embassy_stm32::dma::NoDma;
use embassy_stm32::i2c::I2c;
use embassy_stm32::time::Hertz;
use embassy_stm32::{bind_interrupts, i2c, peripherals};
use {defmt_rtt as _, panic_probe as _};
const HTS221_ADDRESS: u8 = 0x5F;
const WHOAMI: u8 = 0x0F;
bind_interrupts!(struct Irqs {
I2C2_EV => i2c::EventInterruptHandler<peripherals::I2C2>;
I2C2_ER => i2c::ErrorInterruptHandler<peripherals::I2C2>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_stm32::init(Default::default());
let mut i2c = I2c::new(
p.I2C2,
p.PH4,
p.PH5,
Irqs,
NoDma,
NoDma,
Hertz(100_000),
Default::default(),
);
let mut data = [0u8; 1];
unwrap!(i2c.blocking_write_read(HTS221_ADDRESS, &[WHOAMI], &mut data));
// HTS221 data sheet is here: https://www.st.com/resource/en/datasheet/hts221.pdf
// 7.1 WHO_AM_I command is x0F which expected response xBC.
info!("Whoami: 0x{:02x}", data[0]);
assert_eq!(0xBC, data[0]);
}