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Play with timer

 
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cute_gal
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Play with timer
PostPosted: Wed Mar 04, 2009 10:33 am     Reply with quote
Hi..I'm newbie new in PIC programing. My lecturer give me an assignment to develop a timer circuit. The situation is like this:

Initial condition: LED0 turn ON

When i push a button for 5 second: LED1 turn ON.
IF i hold for another 10 second: LED1 and LED2 turn ON.

If i release before 10 or 5 second, LED0 return ON.

I try using some example but don't know how to implement timer inside my coding.

Code:

void main()
{
   set_tris_b (0);
   set_tris_b (0);
   set_tris_c (0xff);
   
   do
   {

      if(portb = 0b00000001)
      {
         portc = 0b00000001;
         delay_ms(5000);
         portc = 0b00000010;
         delay_ms(10000);
         portc = 0b00000110;
         break;
      } 
         
      else if(portb = 0b00000000)
      {
         portc = 0b00000001;

      }   

         
     
   }while(true);
}





Can anybody show me how to use timer inside my coding? tq Embarassed
Sydney



Joined: 13 Feb 2009
Posts: 71

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PostPosted: Wed Mar 04, 2009 11:02 am     Reply with quote
This should get you started

Code:
#define BUT0 PIN_B0
#define LED0 PIN_C0
#define LED1 PIN_C1
#define LED2 PIN_C2

void main(void){
   int16 time = 0;
   while(input(BUT0)){
      if(++time > 500)
         output_high(LED1);
      else if(time > 1000)
         output_high(LED2);
      delay_ms(10);
   }
}
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