#define uint unsigned int

uint Fre,temp1=50;

void delay( int ms)

{ 

  int i;

  while(ms--)

  for(i=0;i<120;i++);

}

int main( void )

{

  // Stop watchdog timer to prevent time out reset

  WDTCTL = WDTPW + WDTHOLD;

  DCOCTL=CALDCO_16MHZ;BCSCTL1 = CALBC1_16MHZ;

  BCSCTL2 |=SELM_1+DIVM_2;

  P1DIR &=~BIT3;

  P1REN |=BIT3;

  P1OUT |=BIT3;

  P1IE  |=BIT3;

  P1IES |=BIT3;

  P1DIR |=BIT0+BIT6;

  P1OUT &=~BIT6;

  P1OUT |=BIT0;

  _EINT();

  while(1)

  {

    P1OUT ^=(BIT0);

    delay(temp1);

  }

}

#pragma vector=PORT1_VECTOR

__interrupt void PORTP13(void)

{

  uint temp,pushkey=0;

  pushkey=BIT3 & (~P1DIR);

  __delay_cycles(10000);

  temp=P1IN;

  if((~temp) & BIT3==pushkey)

  {

     Fre++;

     temp1 =temp1+100;    

  }

     P1IFG &=~BIT3;

}