#include <stdio.h> 	/*standard i/o functions*/
#include <stdlib.h>
#include <math.h>
#include <iof1.h>


void main()
{
    int choice,actizone;

	do{
		choice = menu(); /* Calls the menu and returns the users choice */

        switch(choice)
        {
        case 1: /* Disarm the alarm */
            {
                arm();
                break;
            }
        case 2: /* Arm the alarm */
            {
                
                break;
            }
        case 3: /* Exit */
            {
                exit(1);
                break;
            }
        }


	  }while(1);
}


menu()
{
    int choice, i;
   	printf("\n ===========================================");
    	printf("\n ----=====| Burgalar Alarm System |=====----");
	printf("\n ================++++++++++++===============");
	printf("\n 1. Arm Alarm");
	printf("\n 2. Disarm Alarm");
	printf("\n 3. Exit");
	printf("\n -------------------------------------------");
	printf("\n\n Please input your choice from the menu :> ");
	scanf("%d", &choice);
    printf("\n");

	 for(i=0;i<1;i++)
     {
	      if(choice < 1 | choice > 4) // if the menu choice is invalid the program will ask the user to re input it.
	       {
           printf("\nInvalid choice please re enter :> ");
	       scanf("%d", &choice);
           i--;
      	   }
     }


return choice;
}




int arm(int argc, char *argv)
{
   unsigned char mask, port;
   unsigned int run,i;
   unsigned int counters[6] = {0};

   PORTG = 63;
   DDRG = 0xff;	//set port to output

   run = 1;


   while (run)
   {
		mask = 1;	//reset mask to one before each iteration
		for (i = 0; i < 6; i++)
		{
			if ((counters[i] == 500) && (port & mask))
			{
				PORTG ^= mask;
				counters[i] = 0;
			}
			counters[i]++;
			mask <<=1;	//check next bit
		
		}
   }



   printf("\n");
   return 0;
}