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I2C EEPROM Sequential read not working properly

Amit Jagtap1
Prodigy 60 points
Other Parts Discussed in Thread: MSP430F5325

Hiee Freinds...

I am using MSP430F5325, here I interface AT24C512 with my controller.My byte write,read and page write operation are works fine but when I came towards the sequential read I get wrong Buffer data. Thanks :-)

here is my Sequential read function

void EEPROM_SequentialRead(unsigned int Address , unsigned char * Data , unsigned int Size)
{
  unsigned char adr_hi;
  unsigned char adr_lo;
  unsigned int counterSize;
  while (UCB0STAT & UCBUSY);                // wait until I2C module has
                                            // finished all operations
  adr_hi = Address >> 8;                    // calculate high byte
  adr_lo = Address & 0xFF;                  // and low byte of address
  I2CBufferArray[1] = adr_hi;               // store single bytes that have to
  I2CBufferArray[0] = adr_lo;               // be sent in the I2CBuffer.
  PtrTransmit = 1;                          // set I2CBufferArray Pointer
  // Write Address first
  I2CWriteInit();
  UCB0CTL1 |= UCTXSTT;                      // start condition generation
                                            // => I2C communication is started
  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0 w/ interrupts
  // Read Data byte
  I2CReadInit();
  UCB0CTL1 |= UCTXSTT;                      // I2C start condition
  while(UCB0CTL1 & UCTXSTT);                // Start condition sent?
  for(counterSize = 0 ; counterSize < Size ; counterSize++)
  {
    __bis_SR_register(LPM0_bits + GIE);     // Enter LPM0 w/ interrupts
    Data[counterSize] = I2CBuffer;
  }
  UCB0CTL1 |= UCTXSTP;                      // I2C stop condition
  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0 w/ interrupts
  while(UCB0CTL1 & UCTXSTP);                // Ensure stop condition got sent
}

#pragma vector = USCI_B0_VECTOR
__interrupt void USCI_B0_ISR(void)
{
if(UCTXIFG & UCB0IFG)
{
UCB0TXBUF = I2CBufferArray[PtrTransmit];// Load TX buffer
PtrTransmit--; // Decrement TX byte counter
if(PtrTransmit < 0)
{
while(!(UCB0IFG & UCTXIFG));
UCB0IE &= ~UCTXIE; // disable interrupts.
UCB0IFG &= ~UCTXIFG; // Clear USCI_B0 TX int flag
__bic_SR_register_on_exit(LPM0_bits); // Exit LPM0
}
}
else if(UCRXIFG & UCB0IFG)
{
I2CBuffer = UCB0RXBUF; // store received data in buffer
__bic_SR_register_on_exit(LPM0_bits); // Exit LPM0
}
}

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