m24c64-driver

A Rust embedded-hal(-async) driver for the M24C64 I2C EEPROM, featuring arbitrary-length read/writes, timeout behaviour and asynchronous actions.

Add to your project

cargo add m24c64-driver

Feature

• sync include Synchronous Driver API (embedded-hal I2C Trait impl)
• async include Asynchronous Driver API (embedded-hal-async I2C Trait impl)
• defmt add error logging and action tracing for this crate

Examples

Synchronous API with STM32F4XX-hal crate. All examples only work with correctly configured controllers and projects. More details can be found in the corresponding HAL documentation

use m24c64_driver::M24C64;

let mut delay = cp.SYST.delay(&clocks); // stm32f4xx-hal
// let mut delay = embassy_time::Delay; // embassy-time

let eeprom = M24C64::new_blocking(i2c, 0b000);
eeprom.write_blocking(0xA0, &[0x00, 0x01, 0x02, 0x03], &delay);

let mut my_buf = [0u8; 4];
eeprom.read_blocking(0xA0, &mut my_buf);
// my_buf = [0x00, 0x01, 0x02, 0x03]

Note the use of [embedded_hal::blocking::delay::DelayMs], which is used to retry the write every 1ms until it either succeeds, or 10ms has passed (2*t_w in the M24C64 datasheet).