Write a C language program that implements a 12 hour real time clock using the LCD display unit on the MSP430FG4618 experimenter board. The clock format should be:

hours : minutes : seconds

10 : 30 : 23

Every second, the LCD display should be updated with the new time. The LCD display should be called from the timer interrupt service function to update the various seven segment displays based upon a set of time variables.

LCD display has seven segments and two colons are turned on as well:

_ _ _ _ _ _ _

1 0:3 0:2 3

Here is the code format:

#include "msp430fg4618.h"

#include "intrinsics.h"

#include "stdio.h"

__interrupt void Time_ISR(void);

int main(void){

WDTCTL=WDTPW+WDTHOLD;

P2DIR |= LED;

P2OUT = LED;

TACCTL0 = CCIE;

TA0CTL= MC_1 | ID_3 | TASSEL_1 | TACLR;

TACCR0= 0x1000; //every one second

__enable_interrupt();

for(;;){

// add main body of code here

}

}

#pragma vector= TIMERA0_VECTOR;

__interrupt void Timer_ISR(void){

P2OUT ^=LED;

}

PSEUDOCODE to increment the time variables:

su= second units

st= second tenths

mu= minute units

mt= minute tenths

h= hours

hu= hours units

ht= hour tenths

su++;

if (su==10){

su=0;

mu++

}

if (st==6){

st=0;

mu++

}

if(mu==10){

mu=0;

mt++

}

if(mu==6){

mt=0;

h++;

}

if(h==13){

h=1;

}

hu=h;

ht=0;

if(h==10){

hu=0;

ht=1;

}

if(h==1){

hu=1;

ht=1;

}

if(h==12){

hu=2;

ht=1;

}