#include <msp430.h> 

/*
 * main.c
 */
int main(void) {
    WDTCTL = WDTPW | WDTHOLD;	// Stop watchdog timer

    //Set P1.0 high
    P1DIR |= BIT0;
    P1OUT &= ~BIT0;

    //Increase Clock frequency to ~20 MHz
    DCOCTL = DCO2 + DCO1 + DCO0; //Same thing as BIT7 + BIT6 + BIT5;
    BCSCTL1 = RSEL3 + RSEL2 + RSEL1 + RSEL0;
    BCSCTL2 = 0;
    BCSCTL3 = 0;

    //Setup TimerA for PWM
    TA0CTL = MC0 + MC1 + TASSEL_2;
    TA0CCTL1 = OUTMOD1;
    TA0CCTL0 |= CCIE;

    TA0CCR0 = 100;//Period in # of clocks (/2)
    TA0CCR1 = 49; //Duty Cycle in # of clock / TA0CCR0

    //Configure P1.6 to output TimerA output 1
    P1DIR |= BIT6;
    P1SEL |= BIT6;


    _BIS_SR(GIE);

    //Bad way to PWM
    while(1)
    {
    	P1OUT ^= BIT0;

    	//stand-in for other computations
    	__no_operation();
    }

	return 0;
}
//TA0_A1 Interrupt Vector
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A(void)
{
	//Now edit the duty cycle
	TA0CCR1 = TA0CCR1 + 5;
	if (TA0CCR1 > TA0CCR0-10 ){
		TA0CCR1 = 5;
	}
}