#include "io430.h"
#include "intrinsics.h"
#include "../LCD.h"
#include "stdio.h"

#define GO 1
#define STOP 0

int hh=0, mm=0, ss=0, mode=GO;

int main( void )
{ 
  char strDisp[8+1];
  float freq;
  // Stop watchdog timer to prevent time out reset 
  WDTCTL = WDTPW + WDTHOLD; // Stop WDT
  
  P2DIR |= 0x01; // P2.0 output
  P2OUT = 0;
  CCTL0 = CCIE;  // CCR0 interrupt enabled
  
  // fréquence = 32768/CCR0 [Hz]
  freq = 1; // Hz
  CCR0 = 32768/freq - 1; 
  TACTL = TASSEL_1 + MC_1;  // ACLK, upmode
  
  P1IES &= 0x00;   // interrupt P1.x au flancs montants
  P1IE  |= 0x0F;   // enable interrupt P1.x
  P1IFG  = 0x00;  

  __enable_interrupt();
  
  LCD_init();   // initialise et efface LCD
  
  while (1)
  { 
    sprintf(strDisp, "%02d %02d %02d", hh, mm, ss);  
    LCD_print(strDisp);
  }
}

// Timer_A TACCR0 interrupt vector handler
#pragma vector= TIMERA0_VECTOR
__interrupt void int_timerA(void)
{
  P2OUT ^= 0x01;      // Toggle P2.x  
  if (mode)    ss++;
  if (ss == 60)
  { ss = 0;
    mm++;
  }
  if (mm == 60)
  { mm = 0;
    hh++;
  }
  if (hh == 24)  hh=0;
}
 
// routine d'interruption de P1
#pragma vector=PORT1_VECTOR
__interrupt void Port1_ISR (void)
{ 
  if (P1IFG == 0x01)   
  { if (mode == GO)
    { // CCTL0 = 0;     // CCR0 interrupt disabled
      mode = STOP;
    }
    else
    { // CCTL0 = CCIE;  // CCR0 interrupt enabled
      mode = GO;
    }
  }
  else if (mode == STOP) 
  switch (P1IFG)
  { case 0x02:
      ss++;
      if (ss == 60)
      { ss = 0;
        mm++;
      }
      break;
    case 0x04:
      mm++;
      if (mm == 60)
      { mm = 0;
        hh++;
      }
      break;
    case 0x08:
      hh++;
      if (hh == 24)  hh=0;
      break;  
  }
  P1IFG = 0x00;
}