#include<io.h>
#include<signal.h>
uint8_t ui8_LOW=0;
uint16_t ui16_high=50000;

void main(void){
  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer
  //SMLK 1MHZ
  BCSCTL1 = CALBC1_1MHZ;
  DCOCTL = CALDCO_1MHZ;

  P1DIR |= 0x0E;                           // P5.1 output

  TACCTL0 = CCIE;                           // TBCCR0 interrupt enabled
  TACCR0 = 10000;                            //

  TACTL = TASSEL_2+MC_2;                    // SMCLK, continuous mode

  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0 w/interrupt
  while(1);
}


interrupt(TIMERA0_VECTOR) Timer_A0 (void)
{
	if(ui8_LOW==1)
	{
		P1OUT^=0x02;
		TACCR0+=ui16_high;
		ui8_LOW=0;
	}else{
		P1OUT^=0x02;
		TACCR0+=65535-ui16_high;
		ui8_LOW=1;
	}
}