#include "io430.h"
#include "intrinsics.h"

int main( void )
{ 
  float freq;
  // Stop watchdog timer to prevent time out reset 
  WDTCTL = WDTPW + WDTHOLD; // Stop WDT
  
  P2DIR |= 0xCF; // P2.0 output
  P2OUT = 0;
  CCTL0 = CCIE;  // CCR0 interrupt enabled
  
  // fréquence = 32768/CCR0 [Hz]
  freq = 2; // Hz
  CCR0 = 32768/freq - 1; 
  TACTL = TASSEL_1 + MC_1;  // ACLK, upmode
  __enable_interrupt();
   
  while (1);
}

// Timer_A TACCR0 interrupt vector handler
#pragma vector= TIMERA0_VECTOR
__interrupt void int_timerA(void)
{
  P2OUT ^= 0xCF;      // Toggle P2.x
}