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stm32: add timeout to I2C driver

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This commit is contained in:
Andres Oliva
2023-10-10 18:10:53 +02:00
parent eff73d6dfa
commit cd12c9cbce
7 changed files with 85 additions and 290 deletions
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8
examples/stm32f4/src/bin/i2c.rs
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@ -5,7 +5,7 @@
use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::dma::NoDma;
use embassy_stm32::i2c::{Error, I2c, TimeoutI2c};
use embassy_stm32::i2c::{Error, I2c};
use embassy_stm32::time::Hertz;
use embassy_stm32::{bind_interrupts, i2c, peripherals};
use embassy_time::Duration;
@ -34,13 +34,9 @@ async fn main(_spawner: Spawner) {
Default::default(),
);
// I2C bus can freeze if SCL line is shorted or due to a broken device that clock stretches for too long.
// TimeoutI2c allows recovering from such errors by throwing `Error::Timeout` after a given delay.
let mut timeout_i2c = TimeoutI2c::new(&mut i2c, Duration::from_millis(1000));
let mut data = [0u8; 1];
match timeout_i2c.blocking_write_read(ADDRESS, &[WHOAMI], &mut data) {
match i2c.blocking_write_read(ADDRESS, &[WHOAMI], &mut data) {
Ok(()) => info!("Whoami: {}", data[0]),
Err(Error::Timeout) => error!("Operation timed out"),
Err(e) => error!("I2c Error: {:?}", e),