eeprom

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EEPROM Click

EEPROM Click is an accessory board in mikroBUS form factor. It features 24C08WP - a highly reliable, high performance CMOS technology serial 8K EEPROM in DIP packaging.

Click Product page

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Click library

• Author : Nemanja Medakovic
• Date : Oct 2019.
• Type : I2C type

Software Support

We provide a library for the Eeprom 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Eeprom Click driver.

Standard key functions :

• Config Structure Setup function.

void eeprom_cfg_setup( eeprom_cfg_t *cfg );

• Click Initialization function.

eeprom_retval_t eeprom_init( eeprom_t *context, eeprom_cfg_t *cfg );

Example key functions :

• Page Write function.

void eeprom_write_page( eeprom_t *context, uint8_t reg_addr, eeprom_i2c_data_t *data_in );

• Sequential Read function.

eeprom_retval_t eeprom_read_sequential( eeprom_t *context, uint8_t reg_addr, uint16_t n_bytes, eeprom_i2c_data_t *data_out );

• Write Protect function.

void eeprom_write_protect( eeprom_t *context );

Examples Description

This is a example which demonstrates the use of EEPROM Click board.

The demo application is composed of two sections :

Application Init

Initializes peripherals and pins used by EEPROM Click. Initializes SPI serial interface and puts a device to the initial state.

void application_init( void )
{
    eeprom_cfg_t eeprom_cfg;
    log_cfg_t log_cfg;

    //  Click initialization.
    eeprom_cfg_setup( &eeprom_cfg );
    EEPROM_MAP_MIKROBUS( eeprom_cfg, MIKROBUS_1 );
    eeprom_init( &eeprom, &eeprom_cfg );

    /** 
     * 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 Done  ----\r\n" );
}

Application Task

First page of memory block 1 will be written with data values starting from 1 to 16. This memory page will be read by the user, to verify successfully data writing. Data writing to memory will be protected upon memory writing, and before memory reading.

void application_task( void )
{
    eeprom_i2c_data_t transfer_data[ EEPROM_NBYTES_PAGE ];
    uint8_t cnt;

    transfer_data[ EEPROM_BLOCK_ADDR_START ] = 1;

    for (cnt = EEPROM_BLOCK_ADDR_START + 1; cnt < EEPROM_NBYTES_PAGE; cnt++)
    {
        transfer_data[ cnt ] = transfer_data[ cnt - 1 ] + 1;
    }

    eeprom_write_enable( &eeprom );
    eeprom_write_page( &eeprom, EEPROM_BLOCK_ADDR_START, transfer_data );
    eeprom_write_protect( &eeprom );

    Delay_ms ( 1000 );
    memset( transfer_data, 0, sizeof(transfer_data) );

    eeprom_read_sequential( &eeprom, EEPROM_BLOCK_ADDR_START, EEPROM_NBYTES_PAGE, transfer_data );

    for (cnt = EEPROM_BLOCK_ADDR_START; cnt < EEPROM_NBYTES_PAGE; cnt++)
    {
        log_printf( &logger, " %d", transfer_data[ cnt ] );
        Delay_ms ( 300 );
    }
    log_printf( &logger, "\r\n" );
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Eeprom

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.

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