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mikroSDK Library

Dual EE click

Rating:

5

Author: MIKROE

Last Updated: 2019-09-23

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: EEPROM

Downloaded: 3873 times

Not followed.

License: MIT license  

Dual EE Click contains two AT24CM02 EEPROM ICs onboard which gives total of 4MB of memory. Each memory IC can be addressed through the I2C interface with the transfer speed of 400KHz.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

Dual EE click

Dual EE click

Native view of the Dual EE click board.

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Dual EE click

Dual EE click

Front and back view of the Dual EE click board.

View full image

Library Description

The library includes functions to write data to memory and read data from memory.

Key functions:

  • uint8_t dualee_read(uint32_t regAddress, uint8_t *dataBuff, uint8_t nBytes) - Reading data from memory
  • uint8_t dualee_write(uint32_t regAddress, uint8_t *dataBuff, uint8_t nBytes) - Writing data to memory

Examples description

The application is composed of three sections :

  • System Initialization - Initializes I2C module
  • Application Initialization - Initializes driver init
  • Application Task - Reads your command and then execute i
  • Commands : '+' - increment current address '-' - decrement current address 'r' - read from current address 'w' - write from current address and then read it
void applicationTask()
{
    uint8_t dataReady_;
    uint16_t addressTemp;
    char receivedData_;
    char addressStr[10];

    
    if (inputDone == 1)
    {
        mikrobus_logWrite( "", _LOG_LINE);
        mikrobus_logWrite("Current page address is 0x", _LOG_TEXT);
        
        addressTemp = (pageAddress >> 16) & 0x00FF;
        IntToHex(addressTemp, addressStr);
        mikrobus_logWrite( addressStr, _LOG_TEXT);

        IntToHex(pageAddress, addressStr);
        mikrobus_logWrite( addressStr, _LOG_LINE);
        
        mikrobus_logWrite( "", _LOG_LINE);
        mikrobus_logWrite( "Enter '+' if you want to increment current address or '-' if you want to decrement current address", _LOG_LINE);
        mikrobus_logWrite( "Enter 'w' write text in current address or 'r' to read from current address:", _LOG_LINE);
        mikrobus_logWrite( "", _LOG_LINE);
        inputDone = 0;
    }

    dataReady_ = UART_Rdy_Ptr( );

    if (dataReady_ != 0)
    {
        receivedData_ = UART_Rd_Ptr( );

        switch (receivedData_)
        {
            case '+' :
            {
                if(pageAddress < _DUALEE_ADDRESS_END)
                {
                    pageAddress ++;
                }
                else
                {
                    mikrobus_logWrite( "Can't increment address, this is last address!", _LOG_LINE);
                }
                inputDone = 1;
                break;
            }
            case '-' :
            {
                if(pageAddress > _DUALEE_ADDRESS_START)
                {
                    pageAddress --;
                }
                else
                {
                    mikrobus_logWrite( "Can't decrement address, this is first address!", _LOG_LINE);
                }
                inputDone = 1;
                break;
            }
            case 'w' :
            {
                dualee_textWrite();
                inputDone = 1;
                break;
            }
            case 'r' :
            {
                dualee_textRead();
                inputDone = 1;
                break;
            }
        }
    }

    Delay_ms(1000);
}

Additional Functions :

  • void dualee_textRead() - Reads current address and logs that data to USBUART
  • void dualee_textWrite() - Writes on current address, reads that and then logs that data to USBUART

Note :

  • When you want to stop writing, you need to send '|'
  • After you read or write something you should set slight delay

Other mikroE Libraries used in the example:

  • I2C
  • Conversions

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB 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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