CCS/MSP430FR2355: Problem in generating clock pulse in I2C and setting the TxIFG flag

I tried using P4SEL0 |=  0xC0;.   But it is still not working.

Actually it is not A5.  It is 0x00,  It is Command code for configuration register.

This is my code :

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

uint8_t RL;
uint8_t RH;
uint16_t t = 0;
uint16_t i = 0;
EUSCI_B_I2C_initMasterParam master = {
EUSCI_B_I2C_CLOCKSOURCE_SMCLK,
1000000,
EUSCI_B_I2C_SET_DATA_RATE_100KBPS,
5,
EUSCI_B_I2C_NO_AUTO_STOP
};

int main(void)
{
// stop watchdog timer

P1DIR = 0x01;
P1OUT = 0x01;        // LED on

P4SEL0 |= BIT6 | BIT7;

EUSCI_B_I2C_initMasterParam* pmaster;

pmaster = &master;

EUSCI_B_I2C_disable(EUSCI_B1_BASE);

EUSCI_B_I2C_initMaster(EUSCI_B1_BASE, pmaster);
EUSCI_B_I2C_setSlaveAddress(EUSCI_B1_BASE, 0x10);

EUSCI_B_I2C_setMode(EUSCI_B1_BASE, EUSCI_B_I2C_TRANSMIT_MODE);

P4SEL1 |= 0xC0;
EUSCI_B_I2C_enable(EUSCI_B1_BASE);

i = UCB1CTLW0;
//EUSCI_B_I2C_setMode(EUSCI_B1_BASE, EUSCI_B_I2C_TRANSMIT_MODE);

EUSCI_B_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x00);             // command code for configuration register

EUSCI_B_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE, 0x00);         // value to be written into configuration register

EUSCI_B_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x08);           // command code for red register

//EUSCI_B_I2C_setMode(EUSCI_B1_BASE, EUSCI_B_I2C_RECEIVE_MODE);

EUSCI_B_I2C_masterReceiveStart(EUSCI_B1_BASE);       // start receiving data from Red register

RL = EUSCI_B_I2C_masterReceiveMultiByteNext(EUSCI_B1_BASE);        // LSB(low byte) of red register

RH = EUSCI_B_I2C_masterReceiveMultiByteFinish(EUSCI_B1_BASE);     //MSB(high byte) of red register

P1OUT = 0x00;      // LED off
return 0;
}

> PM5CTL0 &= ~LOCKLPM5; // Engage GPIOs

I have added this statement. But I am still getting the same problem. The clock is not being generated on the SCL pin. 

I even connected pullup resistors between SCL SDA pins and 3.3V. I tried with both 9.2K and 4.7K resistors.

I am uploading the picture  of the scope when I run the code.  I am also uploading the code.

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

uint8_t RL;
uint8_t RH;
uint16_t t = 0;
uint16_t i = 0;
EUSCI_B_I2C_initMasterParam master = {
                                      EUSCI_B_I2C_CLOCKSOURCE_SMCLK,
                                      1000000,
                                      EUSCI_B_I2C_SET_DATA_RATE_100KBPS,
                                      5,
                                      EUSCI_B_I2C_NO_AUTO_STOP
                                      };

int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;  // stop watchdog timer

    PM5CTL0 &= ~LOCKLPM5;   //Engage GPIOs

	P1DIR = 0x01;
	P1OUT = 0x01;   // LED on

	//P4DIR = 0x00;

	//P4SEL1 |= 0xC0;
	P4SEL0 |= 0xC0;

	P4REN |= 0xC0;
	//P4OUT |= 0xC0;

//	EUSCI_B_I2C_remapPins(EUSCI_B1_BASE, EUSCI_B_I2C_REMAP_PINS_TRUE);

	EUSCI_B_I2C_initMasterParam* pmaster;
	pmaster = &master;

    //EUSCI_B_I2C_disable(EUSCI_B1_BASE);

	EUSCI_B_I2C_initMaster(EUSCI_B1_BASE, pmaster);
	EUSCI_B_I2C_setSlaveAddress(EUSCI_B1_BASE, 0x10);

    //EUSCI_B_I2C_setMode(EUSCI_B1_BASE, EUSCI_B_I2C_TRANSMIT_MODE);

	P4SEL1 |= 0xC0;
	EUSCI_B_I2C_enable(EUSCI_B1_BASE);

	//__delay_cycles(10000);

	//EUSCI_B_I2C_setMode(EUSCI_B1_BASE, EUSCI_B_I2C_TRANSMIT_MODE);

	//EUSCI_B_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x00);      // command code for configuration register

	EUSCI_B_I2C_masterSendSingleByte(EUSCI_B1_BASE, 0x00);

	EUSCI_B_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE, 0x00);     // value to be written into configuration register

	EUSCI_B_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x08);      // command code for red register

    //EUSCI_B_I2C_setMode(EUSCI_B1_BASE, EUSCI_B_I2C_RECEIVE_MODE);

	EUSCI_B_I2C_masterReceiveStart(EUSCI_B1_BASE);          // start receiving data from Red register

	RL = EUSCI_B_I2C_masterReceiveMultiByteNext(EUSCI_B1_BASE);     // LSB(low byte) of red register

	RH = EUSCI_B_I2C_masterReceiveMultiByteFinish(EUSCI_B1_BASE);   //MS(high byte) of red register

	P1OUT = 0x00;       // LED off
	return 0;
}

I am getting all the pulses but only once.
If I run my code again it does not work.
It works when I unplug the USB and plug it back.
Moreover, it does not work when I debug and run it.
It works only if i flash it onto the board.

Ok I will try that.

I am using CCS.

My problem is that, if I debug and run the code, it is not working i.e. no clock is being generated.

It is working only if I flash it on to the board and then remove the USB and plug it back.

When I run it like this I cannot see variables that I am using to receive the data from the slave.

Can you suggest something for that.