Driver compatible with ESP-IDF and STM32CubeIDE to use AT24CS0x EEPROM memory with embedded serial ID series

• Initialization function allows use a custom delay function to ensure compatibility with bare-metal and RTOS applications
• Algorithm to prevent overwriting within the same page and ensure data length does not exceed the available memory
• Multiple instances.

To use this component follow the next steps:

1. Configure the component in the project configuration menu (idf.py menuconfig)

Component config->AT24CS0x Configuration

2. Include the I2C driver component headers

#include "driver/i2c_master.h"
#include "at24cs0x.h"

3. Declare a handle of I2C bus and an instance of the compoent

i2c_master_bus_handle_t i2c_bus_handle; 
at24cs0x_t eeprom;

4. Define a custom delay function in miliseconds according your application

/* Custom delay function */
void delay_ms(uint32_t time)
{
    vTaskDelay(pdMS_TO_TICKS(time));
}

5. In the main function initialize the I2C bus and the component instance

/* Configure and create a new I2C bus */
i2c_master_bus_config_t i2c_bus_config = {
    .clk_source = I2C_CLK_SRC_DEFAULT,
    .i2c_port = I2C_NUM_0,
    .scl_io_num = GPIO_NUM_48,
    .sda_io_num = GPIO_NUM_47,
    .glitch_ignore_cnt = 7
};

ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle));

/* Initialize AT24CS0x instance for AT24CS02 */
ESP_ERROR_CHECK(at24cs0x_init(&eeprom, i2c_bus_handle, AT24CS0X_I2C_ADDRESS, AT24CS0X_MODEL_02, delay_ms));

7. Perform a sequential random write

/* Declare an array to write in EEPROM */
uint8_t data[32] = 0xFF;

/* Write data array in address 0xF */
ESP_ERROR_CHECK(at24cs0x_write(&eeprom, 0xF, data, 32));

TBD

MIT License

Copyright (c) 2025 Mauricio Barroso Benavides

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