[PIC] I2C and PIC: write block EEPROM

[wbenatti]

Hi! I made functions for I2C comunication between EEPROM Atmel 24C64 and PIC18F46K80. Except writeBlock, all others functions work fine. My functions are:
writeChar
wiriteBlock
readChar
readBlock

PROBLEM:
For example, when I write a block from 0x0000 memory address, works fine. But, when I write a block from any other memory address, some disorder occurs in recorded data.

I appreciate any help.


writeBlock function:

/*==============================================================================
function  : signed char writeBlock_24C64
Descrição : Write a block of data from a memory address
Parameters:   deviceAddr : Address of the device on the I2C bus
              dataAddr   : Address of memory to be written
              blockLength: Number of bytes to be written
              *datBlock  : Pointer to the block of data to be written in memory.
Retorno:    ERROR_UNKNOW         : (0) Writing error
            SUCCESS_EXEC         : (1) Memories written successfully
            
--------------------------------------------------------------------------------
EXAMPLE USAGE:

    char i= 0;
    char set[100];
    char get[100];
    char val[4];

    writeBlock_24C64(0xA2, 0x0F0F, sizeof(set), set);
    readBlock_24C64(0xA2, 0x0F0F, sizeof(get), get);

    for (i = 0; i < sizeof(get); i++ ) {
        ByteToStr(get[i], val);
        UART1_Write_Text(val);
    }
            
==============================================================================*/
signed char writeBlock_24C64(char deviceAddr, unsigned int dataAddr, unsigned int blockLength, char *datBlock) {
    char aux;
    unsigned int i, count;

    // Begins the first block
    I2C1_Start();
    if (I2C1_Wr(deviceAddr)) return ERROR_UNKNOW;
    aux = (dataAddr >> 8) & 0x1F;
    if (I2C1_Wr(aux)) return ERROR_UNKNOW;
    aux = dataAddr & 0x00FF;
    if (I2C1_Wr(aux)) return ERROR_UNKNOW;

    i     = 0;
    count = 1;
    while (i < blockLength) {
        // Writes the current byte and advances to the next byte
        if (I2C1_Wr(*datBlock)) return ERROR_UNKNOW;
        datBlock++;
        i++;

        // Checks the memory page break
        if (i / (count * PAGE_BLOCK_WIDTH_24C64)) {
            // Ends the current block writing
            I2C1_Stop();
            count++;

            delay_ms(10);

            // Restarts the next data block for writing
            I2C1_Start();
            if (I2C1_Wr(deviceAddr)) return ERROR_UNKNOW;
            aux = ((dataAddr + i) >> 8) & 0x1F;
            if (I2C1_Wr(aux)) return ERROR_UNKNOW;
            aux = (dataAddr + i) & 0x00FF;
            if (I2C1_Wr(aux)) return ERROR_UNKNOW;
        }
    }

    I2C1_Stop();
    delay_ms(10);

    return SUCCESS_EXEC;
}