Interfacing LCD with MSP430 using shift register

#include <msp430fr2311.h>
#define EN BIT0
#define RS BIT1
#define CLK BIT5
#define DATA BIT7
unsigned int i;
unsigned int j;
void delay(unsigned int k)
{
for(j=0;j<=k;j++)
{
for(i=0;i<100;i++);
}
}
void data_write(void)
{
P1OUT |= CLK;
P1OUT |= EN;
delay(2);
P1OUT = ~EN;
P1OUT = ~CLK;
}
void send_command(unsigned char cmd)
{
P1OUT = ~RS;
P1OUT = (P1OUT & 0xF0)|((cmd>>4) & 0x0F); // send higher nibble
data_write(); // give enable trigger
P1OUT = (P1OUT & 0xF0)|(cmd & 0x0F); // send lower nibble
data_write(); // give enable trigger
}
void send_data(unsigned char data)
{
P1OUT  = RS;
P1OUT = (P1OUT & 0xF0)|((data>>4) & 0x0F); // send higher nibble
data_write(); // give enable trigger
P1OUT = (P1OUT & 0xF0)|(data & 0x0F); // send lower nibble
data_write(); // give enable trigger
}
void send_string(char *s)
{
while(*s)
{
send_data(*s);
s++;
}
}
void lcd_init(void)
{
P1DIR |= 0xFF;
P1OUT &= 0x00;
send_command(0x33);
send_command(0x32);
send_command(0x28); // 4 bit mode
send_command(0x0E); // clear the screen
send_command(0x01); // display on cursor on
send_command(0x06); // increment cursor
send_command(0x80); // row 1 column 1
}

int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;                 // Stop watchdog timer
    __bis_SR_register(SCG0);                 // disable FLL

    P1OUT |= BIT0 + BIT1 + BIT5 + BIT7;
    P1DIR |= BIT0 + BIT1 + BIT5 + BIT7;
    P1SEL0 |= BIT0 + BIT1 + BIT5 + BIT7 ;
    P1SEL1  = ~(BIT0 + BIT1 + BIT5 + BIT7);
    UCA0CTLW0 |= UCSWRST;                     // **reset**
    UCA0CTLW0 |= UCMST|UCSYNC|UCCKPL|UCMSB ;   // 3-pin, 8-bit SPI master, Clock polarity high, MSB

    UCA0CTLW0 |= UCSSEL__SMCLK;                //SMCLK
    UCA0BR0 = 0x00;                           // /2,fBitClock = fBRCLK/(UCBRx+1).
       UCA0BR1 = 0;
       UCA0MCTLW = 0;                           // No modulation

    UCA0CTLW0 &= ~UCSWRST;                    // **Initialize USCI state machine**

     lcd_init();
     data_write();
     send_string("0xAA");
     send_command(0xC0);


    PM5CTL0 &= ~LOCKLPM5;                     // Disable the GPIO power-on default high-impedance mode
                                          // to activate previously configured port settings

    while(1)
    {
   
        __bis_SR_register(LPM0_bits | GIE);   // enable global interrupts, enter LPM0
        __no_operation();                     // For debug,Remain in LPM0

    }
}

But its not working.

That's not much of an error description (actually, none).

What have you tried, and what is not working ?

Use the debugger, single-step though the bit set operations, and measure the according pin, e.g. with a voltmeter.

I hv not worked with LCDs earlier. So I dont know very well how to write the function which diaplays any data on the LCD screen. Also I dont know how to send the data to the LCD through 74HC164 shift register. The code I hv written is not working means nothing gets displayed on LCD screen.

Just to get an idea of bitbanging data:

Here is my updated code. Still I am unable to see any data on the lcd screen. Can anyone tell me what is wrong in this code?

#include <msp430fr2311.h>
#define EN BIT0
#define RS BIT1
#define CLK BIT5
#define DATA BIT7
void send_command(unsigned char cmd)
{
P1OUT = ~RS;
UCA0TXBUF =cmd;
}
void send_data(unsigned char data)
{
P1OUT  = RS;
UCA0TXBUF = data;
}
void lcd_init(void)
{
P1DIR |= 0xFF;
P1OUT &= 0x00;
send_command(0x33);
send_command(0x32);
send_command(0x28); // 4 bit mode
send_command(0x0E); // clear the screen
send_command(0x01); // display on cursor on
send_command(0x06); // increment cursor
send_command(0x80); // row 1 column 1
}
int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;                 // Stop watchdog timer
    __bis_SR_register(SCG0);                 // disable FLL

    P1OUT |= BIT0 + BIT1;
    P1OUT |= BIT5 + BIT7;
    P1DIR |= BIT0 + BIT1;
    P1DIR |= BIT5 + BIT7;
    P1SEL0 |= BIT0 + BIT1;
    P1SEL1 &=~(BIT0 + BIT1);
    P1SEL0 |= BIT5 + BIT7;
    P1SEL1 &=~(BIT5 + BIT7);

    UCA0CTLW0 |= UCSWRST;                     // **reset**
    UCA0CTLW0 |= UCMST|UCSYNC|UCCKPL|UCMSB ;   // 3-pin, 8-bit SPI master, Clock polarity high, MSB

    UCA0CTLW0 |= UCSSEL__SMCLK;                //SMCLK
    UCA0BR0 = 0x00;                           // /2,fBitClock = fBRCLK/(UCBRx+1).
    UCA0BR1 = 0;
    UCA0MCTLW = 0;                           // No modulation

    UCA0CTLW0 &= ~UCSWRST;                    // **Initialize USCI state machine**
    PM5CTL0 &= ~LOCKLPM5;                     // Disable the GPIO power-on default high-impedance mode
                                          // to activate previously configured port settings

    while(1)
    {
            P1OUT |= CLK;
        	P1OUT &= ~CLK;
        	P1OUT |= EN;
        	P1OUT &= ~EN;
              lcd_init();
              __delay_cycles(200);
             send_data(0xAA);
              __delay_cycles(200);
             send_command(0xC0);
            __delay_cycles(200);

  }
}