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

int i,j;
unsigned char mode=0;

//******************************************************************************
//routine d'interruption qui survient lorsqu'un des p1.x a un flanc
#pragma vector=PORT1_VECTOR
__interrupt void Port1_ISR (void) // PORT1ISR (void)
{ 
  if (P1IFG == mode)   
    mode = 0;
  else        
    mode = P1IFG & 0x0F;
 
  P1IFG = 0;
}

int main( void )
{ 
  // Stop watchdog timer to prevent time out reset
  WDTCTL = WDTPW + WDTHOLD;

  P2DIR |= 0xCF;   // P2.0-3,6-7 output
  P2OUT  = 0x00;
  
  P1IES &= 0x00;   // interrupt P1.x au flancs montants
  P1IE  |= 0x0F;   // enable interrupt P1.x
  P1IFG  = 0;  // 
  
  __enable_interrupt();
  
  while(1)
  { switch (mode) {  
     case 0x00: 
      P2OUT = 0x00;
      break;

     case 0x01: 
      P2OUT = 0xCF;
      break;

     case 0x02: 
      P2OUT = 1<<i;
      for (j=0 ; j<30000 ; j++);
      P2OUT = 0;
      i++; 
      if (i==4) i=i+2;
      if (i==8) i=0;
      break;
      
     case 0x04:
      P2OUT = 0xCF;
      for (j=0 ; j<30000 ; j++);
      P2OUT = 0;
      for (j=0 ; j<30000 ; j++);
      break;
   }
  }
}