Emulated EEPROM what does ..._Write() function exactly do?

ivkac_4155501 · ‎Apr 04, 2019

Dear community,

I have a question about how exactly the emulated EEPROM function Write() works:

I have a constant array

const uint8 store[SIZEOF_EEPROM_ROW] = {};

Then I have an array

uint8 zustand[SIZEOF_EEPROM_ROW] = {};

zustand[0] = 3;

later in the code I use the Write function.

writeStatus = Em_Eeprom_Write(zustand,store,1);

I thought when the write function is done, the first entry of store array must be 3, but it is apperently not because when I test it:

if(store[0] == 3)

{

n++;

}

it just skips it.

GeonaP_26 · ‎Apr 08, 2019

I wonder whether the writeStatus is successful. Hence, please change it to, writeStatus = Em_EEPROM_Write(zustand[0], store, 1); the writeStatus will be successful. It writes one byte of data from source array (namely store in this case) to third logical position of Em_EEPROM data storage. If you read back the Em_EEPROM data storage, the third byte will be store[0]. Since store array is empty, please modify the firmware to following. For better understanding, please refer to Em_EEPROM datasheet.

    const uint8 store[SIZEOF_EEPROM_ROW] =  {11,22,33,44};
    uint8 zustand[SIZEOF_EEPROM_ROW] = {};
    zustand[0] = 3;
    UART_PutString("EmEEPROM demo \n\r");
    /*Initalize EEPROM with the start address of the memory location*/
    eepromReturnValue = Em_EEPROM_Init((uint32_t)Em_EEPROM_em_EepromStorage);
    
    /*Write contents to EEPROM */
    eepromReturnValue = Em_EEPROM_Write(zustand[0], store, 1); 
    /*Read contents of EEPROM after write*/
    eepromReturnValue = Em_EEPROM_Read(0, eepromArray, 10);
    if(eepromArray[3]==11)
    {
        UART_PutString("The third position of Em_EEPROM storage is 11 \n\r");
    }

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Emulated EEPROM what does ..._Write() function exactly do?

Emulated EEPROM what does ..._Write() function exactly do?

Re: Emulated EEPROM what does ..._Write() function exactly do?