EEPROM 12 click

EEPROM 12 Click is a compact add-on board that contains a highly reliable, nonvolatile memory solution. This board features the M24256E, an EEPROM from STMicroelectronics. It is a 256Kbit (32KB) EEPROM with a page size of 64 bytes and an additional identification page with the same size. This identification page can be read or written and (later) permanently locked in read-only mode and can be used to store sensitive application parameters.

click Product page

Click library

• Author : Nenad Filipovic
• Date : Sep 2023.
• Type : I2C type

Software Support

We provide a library for the EEPROM 12 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for EEPROM 12 Click driver.

Standard key functions :

• eeprom12_cfg_setup Config Object Initialization function.

  void eeprom12_cfg_setup ( eeprom12_cfg_t *cfg );

• eeprom12_init Initialization function.

  err_t eeprom12_init ( eeprom12_t *ctx, eeprom12_cfg_t *cfg );

Example key functions :

• eeprom12_memory_write EEPROM 12 memory write function.

  err_t eeprom12_memory_write ( eeprom12_t *ctx, uint16_t mem_addr, uint8_t *data_in, uint8_t len );

• eeprom12_memory_read EEPROM 12 memory read function.

  err_t eeprom12_memory_read ( eeprom12_t *ctx, uint16_t mem_addr, uint8_t *data_out, uint8_t len );

Example Description

This example demonstrates the use of EEPROM 12 click board™. The demo app writes specified data to the memory and reads it back.

The demo application is composed of two sections :

Application Init

The initialization of I2C module, log UART, and additional pins.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    eeprom12_cfg_t eeprom12_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    eeprom12_cfg_setup( &eeprom12_cfg );
    EEPROM12_MAP_MIKROBUS( eeprom12_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == eeprom12_init( &eeprom12, &eeprom12_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    Delay_ms ( 100 );

    log_info( &logger, " Application Task " );
    Delay_ms ( 100 );
}

Application Task

The demo application writes a desired number of bytes to the memory and then verifies if it is written correctly by reading from the same memory location and displaying the memory content. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{
    uint8_t data_buf[ 128 ] = { 0 };
    memcpy( data_buf, DEMO_TEXT_MESSAGE_1, strlen( DEMO_TEXT_MESSAGE_1 ) );
    if ( EEPROM12_OK == eeprom12_memory_write( &eeprom12, STARTING_ADDRESS, 
                                                          data_buf, 
                                                          strlen( DEMO_TEXT_MESSAGE_1 ) ) )
    {
        log_printf( &logger, " Write data: %s\r\n", data_buf );
        Delay_ms ( 100 );
    }

    memset( data_buf, 0, sizeof( data_buf ) );
    Delay_ms ( 100 );
    if ( EEPROM12_OK == eeprom12_memory_read( &eeprom12, STARTING_ADDRESS, 
                                                         data_buf, 
                                                         strlen( DEMO_TEXT_MESSAGE_1 ) ) )
    {
        Delay_ms ( 100 );
        log_printf( &logger, " Read data: %s\r\n\n", data_buf );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }

    memcpy( data_buf, DEMO_TEXT_MESSAGE_2, strlen( DEMO_TEXT_MESSAGE_2 ) );
    if ( EEPROM12_OK == eeprom12_memory_write( &eeprom12, STARTING_ADDRESS, 
                                                          data_buf, 
                                                          strlen( DEMO_TEXT_MESSAGE_2 ) ) )
    {
        log_printf( &logger, " Write data: %s\r\n", data_buf );
        Delay_ms ( 100 );
    }

    memset( data_buf, 0, sizeof( data_buf ) );
    Delay_ms ( 100 );
    if ( EEPROM12_OK == eeprom12_memory_read( &eeprom12, STARTING_ADDRESS, 
                                                         data_buf, 
                                                         strlen( DEMO_TEXT_MESSAGE_2 ) ) )
    {
        Delay_ms ( 100 );
        log_printf( &logger, " Read data: %s\r\n\n", data_buf );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.EEPROM12

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.