Experiment No. 1: 3-bit LED Up Counter

This is the first and the simplest project we are going to test on our PIC12F683 experiment board. We are going to make a 3-bit up counter that counts from 0 to 7. After 7, we are going to reset it to 0 and then start again, and so on. The 3-bit counter output will be displayed on 3-LEDs on the board. There will be a 1s delay between each up count.
Setup:
Connect GP0, GP1, and GP2 (pins 7, 6, and 5 of PIC12F683) to LEDs 3, 2, and 1 respectively.

 

Connect GPIO2, 1, 0 pins to LEDs 1, 2, 3 using jumper wires.

Software:

/*
  PIC12F683 Experiment Board
  Experimen No. 1 : 3-bit Up Counter
  "LEDs 1, 2, and 3 are connected to GPIO2, GPIO1, and GPIO0
   respectively"
*/

short i;
void main() {
CMCON0 = 7;
TRISIO = 8;  // GPIO0-GPIO2 are Outputs
ANSEL = 0;
GPIO = 0;
delay_ms(500);
i=0;
do {
   GPIO=i;
   delay_ms(1000);
   i = i+1;
   if(i == 8) i=0;

   }while(1);
}

Output:

3 LEDs count up to 7, then reset and count starts again.