CCS/MSP430FR6047: I2C on UCB1 (P5.5 and P5.6) Not Working

Tool/software: Code Composer Studio

Hello!

I used the following code to use New Haven's LCD through I2C successfully with TDC1000-TDC7200 EVM (MS430F5528).

I recently bought MSP-TS430PZ100E and trying to achieve the same using P5.5 and P5.6. But it doesn't work. The LCD doesn't show anything and the pins doesn't show any sign of life when tested by oscilloscope. What am I missing or doing wrong? Here's the code. (I also tried the same using the sample codes from TI but none seems to give me any result.)

/*
* lcd.c
*
* Created on: 2015. 12. 9.
* Author: User
*/
#include <msp430.h>
#include <stdint.h>
#include "lcd.h"

uint8_t firstLine[20];
uint8_t secondLine[20];

#define LCD_I2C_PxOUT P5OUT //Port5
#define LCD_I2C_Px_IN P5IN //Port5
#define LCD_I2C_PxDIR P5DIR //Port4
#define LCD_I2C_SDA_PIN BIT5 //P5.5
#define LCD_I2C_SCL_PIN BIT6 //P5.6

/****************************************************
* Initialization For ST7036i *
*****************************************************/

unsigned int Slave= 0x78;
unsigned int Comsend = 0x00;
unsigned int Datasend=0x40;

/* A crude delay function. Tune by changing the counter value. */
void delay( unsigned int n ) {
volatile int i;

for( ; n; n-- ) {
for( i = 0; i < 50; i++ );
}
}

void data_read(void ) {
LCD_I2C_PxDIR &= ~LCD_I2C_SDA_PIN; // float to get ready to read
}

void data_high(void ) {

LCD_I2C_PxDIR &= ~LCD_I2C_SDA_PIN; // float pin to go high
delay( 5 );

}

void data_low(void ) {

LCD_I2C_PxOUT &= ~LCD_I2C_SDA_PIN; // assert low
LCD_I2C_PxDIR |= LCD_I2C_SDA_PIN;
delay( 5 );
}

void clk_high(void) {

LCD_I2C_PxDIR &= ~LCD_I2C_SCL_PIN; // float pin to go high
delay( 10 );

}

void clk_low(void) {

LCD_I2C_PxOUT &= ~LCD_I2C_SCL_PIN; // assert low
LCD_I2C_PxDIR |= LCD_I2C_SCL_PIN;
delay( 5 );
}
/*****************************************************/
/****************************************************
* I2C Start *
*****************************************************/
void I2C_Start(void)
{
__bic_SR_register(GIE);

P5SEL0 &= ~(BIT5 | BIT6);
P5SEL1 |= BIT5 | BIT6;
clk_high();
data_high();
data_low();
clk_low();
__bis_SR_register(GIE);

/*****************************************************/
/****************************************************
* I2C Stop *
*****************************************************/
void I2C_Stop(void)
{
__bic_SR_register(GIE);

data_low();
clk_low();
clk_high();
data_high();
__bis_SR_register(GIE);
}

/*****************************************************/
/****************************************************
* Output command or data via I2C *
*****************************************************/
void I2C_out(unsigned char d) //I2C Output
{
__bic_SR_register(GIE);

int n;

for( n = 0; n < 8; n++ )
{
if( d & 0x80 )
{
data_high();
}
else
{
data_low();
}

clk_high();
clk_low();

d <<= 1; // Shift next bit into position.
}

data_read(); // Set data line to receive.
clk_high(); // Clock goes high to wait for acknowledge.

// Slave will pull data line low to acknowledge.
//while( P1IN & I2C_SDA )
while( LCD_I2C_Px_IN & LCD_I2C_SDA_PIN )
{
// Else toggle the clock line and check again
clk_low();
data_high();
}

clk_low();
__bis_SR_register(GIE);
}

void init_LCD()
{
I2C_Start();

I2C_out( 0x78 ); // Slave address of the LCD panel.
I2C_out( 0x00 ); // Control byte: all following bytes are commands.
I2C_out( 0x38 ); // 8-bit bus, 2-line display, normal instruction mode.
delay( 10 );

I2C_out( 0x39 ); // 8-bit bus, 2-line display, extension instruction mode.
delay( 10 );

I2C_out( 0x14 ); // Bias set to 1/5.
I2C_out( 0x78 ); // Contrast set.
I2C_out( 0x5E ); // Icon display on, booster on, contrast set.
I2C_out( 0x6D ); // Follower circuit on, amplifier=1?
I2C_out( 0x0F ); // Display on, cursor off.
I2C_out( 0x01 ); // Clear display.
I2C_out( 0x06 ); // Entry mode set to cursor-moves-right.
delay( 10 );

I2C_Stop();
}

/* Sends the "clear display" command to the LCD. */
void clear_display(void)
{
I2C_Start();

I2C_out( 0x78 ); // Slave address of panel.
I2C_out( 0x00 ); // Control byte: all following bytes are commands.
I2C_out( 0x01 ); // Clear display.

I2C_Stop();
}

/*****************************************************/
/****************************************************
* Send string of ASCII data to LCD *
*****************************************************/
//이건 내가 만든 것
void PutOneChar(unsigned char* text)
{
__bic_SR_register(GIE);

I2C_Start();
I2C_out(0x78);
I2C_out(0x40);
I2C_out(*text);
I2C_Stop();
__bic_SR_register(GIE);

}
void Show(unsigned char *text)
{
//__bic_SR_register(GIE);

int n;

I2C_Start();

I2C_out( 0x78 ); // Slave address of panel.
I2C_out( 0x40 ); // Control byte: data bytes follow, data is RAM data.

for( n = 0; n < 20; n++ ) {
I2C_out( *text );
text++;
}
I2C_Stop();
//__bic_SR_register(GIE);
}

void MoveCursor(uint8_t nPos)
{
//__bic_SR_register(GIE);

I2C_Start();

I2C_out( 0x78 ); // Slave address of panel.
I2C_out( 0x00 ); // Control byte: all following bytes are commands.
I2C_out(0x80 + nPos);
I2C_Stop();
//__bis_SR_register(GIE);

}

void ShowBothLines()
{
//__bic_SR_register(GIE);

MoveCursor(0x00);
Show(firstLine);
MoveCursor(0x40);
Show(secondLine);
//__bis_SR_register(GIE);

// __delay_cycles(2500);
}
/*****************************************************/
/*****************************************************/
/*****************************************************/

Please help me. 

Sukho