โครงงานที่22

code

int conv7segment(int number);

main()

{

 int minute,sec;

 TRISB= 0x00;

 TRISA= 0x00;

 CMCON= 0x07;

 PORTA.F0=0;

 PORTA.F1=1;

   for(minute=9;minute>0;minute--)

   {

   PORTB = conv7segment(minute);

   for(sec=0;sec<=59;sec++)

    {

     PORTA.F7=1;

     Delay_ms(500);

     PORTA.F7=0;

     Delay_ms(500);

    }

   }

  PORTB = conv7segment(0);

  PORTA.F0=0;

  PORTA.F1=1;

}

int conv7segment(int number)

{

  switch(number)

  {

  case 1: return 0x06;

  case 2: return 0x5b;

  case 3: return 0x4f;

  case 4: return 0x66;

  case 5: return 0x6d;

  case 6: return 0x7d;

  case 7: return 0x07;

  case 8: return 0x7f;

  case 9: return 0x6f;

  case 0: return 0x3f;

  }

}