button_ISR.c

//******************************************************************************
// December 2012
// Built with Code Composer Studio v4
//******************************************************************************
#include <msp430.h>

unsigned int i;

int main(void)
{
        WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
        P1DIR |= BIT0; // Set P1.0 to output direction
        P1DIR |= BIT6; //Set P1.6 to an output
        P1DIR = ~BIT3;  // P1.3 must stay at input

        P1OUT &= ~BIT0; // set P1.0 to 0 (LED OFF)
        P1OUT |= BIT6; //Set P1.6 to 1 (LED ON)

        P1IE |= BIT3; // P1.3 interrupt enabled
        P1REN |= BIT3; //Set P1.3 internal pull up

        P1IFG &= ~BIT3; // P1.3 IFG cleared

        //LPMx - Low Power Mode
        _BIS_SR(LPM3_bits + GIE); // Enter LPM3 w/interrupt
}

// Port 1 interrupt service routine
#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
        P1OUT ^= BIT0; // P1.0 = toggle
        P1OUT ^= BIT6; // P1.6 toggle
        //P1IFG &= ~BIT3; // P1.3 IFG cleared
        //debounce delay
        i = 10000;
        do i--;
        while(i != 0);
        P1IFG &= ~BIT3; // P1.3 IFG cleared
}