MSP430F5529 I2C code do not work as Master Receiver.

Hi,

I have a simple code for I2C master receiver but it do not work, not even able to break on ISR break points.

I have another MSP430 as Master TX with Arduino, that one works fine,mean the hardware connection is good and Arduino board is good.

I connected this with Arduino board where Arduino board as I2C slave TX.  

use P4.1 and P4.2 as I2C pins. 

Any idea on what I missed?  Thanks a lot!

Here is my code.

#include <msp430.h>

//#include "debug_uart.h"

unsigned char *PTxData;                     // Pointer to TX data
unsigned char TXByteCtr;
void I2C_send(unsigned char Data);
void I2C_receive();

int RXByteCtr, RPT_Flag = 0;                // enables repeated start when 1
volatile unsigned char RxBuffer[128];       // Allocate 128 byte of RAM
unsigned char *PTxData;                     // Pointer to TX data
unsigned char *PRxData;                     // Pointer to RX data

unsigned char SLAVE_ADDRESS = 0x8;
unsigned int ByteToGet = 1;


int main(void)
{
	int i;

	  P4SEL |= 0x06;                            // Assign I2C pins to USCI_B0
	  UCB1CTL1 |= UCSWRST;                      // Enable SW reset
	  UCB1CTL0 = UCMST + UCMODE_3 + UCSYNC;     // I2C Master, synchronous mode
	  UCB1CTL1 = UCSSEL_2 + UCSWRST;            // Use SMCLK, keep SW reset
	  UCB1BR0 = 0x12; // 12;                             // fSCL = SMCLK/12 = ~100kHz
	  UCB1BR1 = 0;
	  UCB1CTL1 &= ~UCSWRST;                     // Clear SW reset, resume operation
	  UCB1I2CSA = SLAVE_ADDRESS;                         //

	  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
	  ByteToGet = 2;
	  RXByteCtr = 0;
	  UCB1I2CSA = SLAVE_ADDRESS;
	  PRxData = (unsigned char *)RxBuffer;    // Start of RX buffer
	  while (UCB1CTL1 & UCTXSTP);             // Ensure stop condition got sent

	  UCB1IE &= ~UCRXIE;
	  UCB1CTL1 = UCSSEL_2 + UCSWRST;            // Use SMCLK, keep SW reset
	 //  while (!(UCB1IFG & UCTXIFG)) ; // wait until data can be written

	  UCB1IE |= UCSTPIE + UCRXIE + UCNACKIE;                          // Enable RX interrupt
	//  UCB1IE |= UCTXIE + UCRXIE + UCNACKIE;                          // Enable RX interrupt
	  for(i=0;i<10;i++);                      // Delay
	  UCB1CTL1 &= ~UCTR;
	  UCB1CTL1 |= UCTXSTT;

	  __bis_SR_register(LPM0_bits + GIE);     // Enter LPM0, enable interrupts
	  while (UCB1CTL1 & UCTXSTT);             // Ensure START condition got sent
	    __no_operation();                       // Remain in LPM0 until all data
                                       // read out the RxData buffer

}

//------------------------------------------------------------------------------
// The USCIAB0TX_ISR is structured such that it can be used to transmit any
// number of bytes by pre-loading TXByteCtr with the byte count. Also, TXData
// points to the next byte to transmit.
//------------------------------------------------------------------------------
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = USCI_B1_VECTOR
__interrupt void USCI_B1_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(USCI_B1_VECTOR))) USCI_B1_ISR (void)
#else
#error Compiler not supported!
#endif
{
  switch(__even_in_range(UCB1IV,12))
  {
  case  0: break;                           // Vector  0: No interrupts
  case  2: break;                           // Vector  2: ALIFG
  case  4:                            // Vector  4: NACKIFG
      UCB1CTL1 |= UCTXSTP;                  // I2C stop condition
      UCB1IFG &= ~UCRXIFG;                  // Clear USCI_B0 TX int flag
      __bic_SR_register_on_exit(LPM0_bits);
  	  	  break;
  case  6: break;                           // Vector  6: STTIFG
  case  8:                          	// Vector  8: STPIFG
	  UCB1IFG &= ~UCSTPIFG;
	  if (RXByteCtr >= ByteToGet)                       // Check RX byte counter
	  {
	      UCB1CTL1 |= UCTXSTP;                  // I2C stop condition
	      UCB1IFG &= ~UCRXIFG;                  // Clear USCI_B0 TX int flag
	      __bic_SR_register_on_exit(LPM0_bits);
	  }

   	   	   break;
  case 10:									 // Vector 10: RXIFG
	  //==================================== rx
	  *PRxData++ = UCB0RXBUF;                 // Get RX'd byte into buffer
	  RXByteCtr++;

    	break;

  //==================================== tx
  case 12: break;                                // Vector 12: TXIFG

  default: break;
  }
}

// Arduino code.

#include <Wire.h>

byte x; 

void setup() {
  Serial.begin(9600);
  Wire.begin(0x8);                // join i2c bus with address #8
  Wire.onReceive(receiveEvent);
  Wire.onRequest(requestEvent); // register event
}

void loop() {
  delay(100);
}

// function that executes whenever data is requested by master
// this function is registered as an event, see setup()
void requestEvent() {
 // Wire.write("123456"); // 
  Serial.print("Request from Master. Sending: ");
  Serial.print("\n");

  Wire.write("1234");
}

void receiveEvent(int bytes)
{
  if(Wire.available() != 0)
  {
    for(int i = 0; i< bytes; i++)
    {
      x = Wire.read();
      Serial.print("Received: ");
      Serial.print(x, HEX);
      Serial.print("\n");
    }
  }
}