/*
 * Project name:
     Display7Seg_02 (Usage of 2 7Seg. displays)
 * Copyright:
     (c) MikroElektronika, 2005-2008.
 * Description:
     This code demonstrates displaying numbers (0,1,2..99) on two 7-segment
     displays. Each digit is on for 1 second.
 * Test configuration:
     MCU:             PIC16F877A
     Dev.Board:       EasyPIC5
     Oscillator:      HS, 08.0000 MHz
     Ext. Modules:    -
     SW:              mikroC v8.0
*/

#include "Display_utils.h"

unsigned short digit_no, digit10, digit1, digit, i;

void interrupt() {
  if (digit_no==0) {
    PORTA = 0;          // Turn off all 7seg displays
    PORTD = digit1;     //  send mask for ones digit to PORTD
    PORTA = 1;          //  turn on 1st 7 seg., turn off 2nd
    digit_no = 1;
  } else {
    PORTA = 0;          // Turn off all 7seg displays
    PORTD = digit10;    //  send mask for tens digit to PORTD
    PORTA = 2;          //  turn on 2nd 7 seg., turn off 1st
    digit_no = 0;
    }
  TMR0 = 0;             //  clear TMRO
  INTCON = 0x20;        //  clear TMR0IF and set TMR0IE
}

void main() {
  OPTION_REG  = 0x80;   // Timer0 settings
  TMR0        =   0;
  INTCON      = 0xA0;   // Disable PEIE,INTE,RBIE,T0IE
  PORTA       =    0;   // clear PORTA (make sure both displays are off)
  TRISA       =    0;   // designate PORTA pins as output
  PORTD       =    0;   // clear PORTD (make sure LEDs are off)
  TRISD       =    0;   // designate PORTD pins as output
  do {
    for (i = 0; i<=99; i++) {          // count from 0 to 99
      digit   = i % 10u;
      digit1  = mask(digit);           // prepare ones digit
      digit   = (char)(i / 10u) % 10u;
      digit10 = mask(digit);           // prepare tens digit
      Delay_ms(1000);
    }
  } while (1);                         // endless loop
}