MSP430 I2C Communication Using USCI Hardware and TI I2C Library

#include <msp430.h>
#include "TI_USCI_I2C_master.h"

#define IR_ADDRESS 0x13
#define IR_REGISTER_PRODUCT_ID 0x81
#define PRESCALE 0x44

unsigned char registerAddress = 0x81;
unsigned char productID = 0;

void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT

BCSCTL1 = CALBC1_8MHZ;
DCOCTL = CALDCO_8MHZ;

_EINT();

//write register address
TI_USCI_I2C_transmitinit(IR_ADDRESS, PRESCALE); // init transmitting with
while ( TI_USCI_I2C_notready() ); // wait for bus to be free
TI_USCI_I2C_transmit(1, &registerAddress); // start transmitting

//read from register
TI_USCI_I2C_receiveinit(IR_ADDRESS, PRESCALE); // init receiving with USCI
while ( TI_USCI_I2C_notready() ); // wait for bus to be free
TI_USCI_I2C_receive(1,&productID);
while ( TI_USCI_I2C_notready() ); // wait for bus to be free

LPM3;

}