Timer PIC16F57

[Dwayne]

Hello Loenel,

How accurate does it have to be on blinking every 20 seconds?
We now have concluded that there is muching going on, thus, it is not just a simple "Blink" a light.

1. How long of a pause is allowed?

For example: Untested... but the idea is there...

  Counter1 var word
  Counter2 Var word
  Loop:
  Counter1=0
  Counter2=0
  Loop2:
   if Counter1< 20
     if Counter2 <1000
         Pause 1  'Pause 1/1000 of a second
         CheckButtons....
         Do stuff...
         CheckButtons....
         Do Stuff
            if CheckButtons==Pushed then goto Loop
         Counter2=Counter2+1;
     Endif
     
     if(Counter2>=1000)
       Counter1=Counter1+1;
       counter2=0;
     endif
   endif
   if Counter1<20 goto Loop2

  Blink light = on
  Pause 200  'pause 1/5 of a second to light up the light.
  Blink Light = off
  goto Loop:

Granted, this is a "oversimplification" of code. But it is a generic program that will allow lights to be blinked and still scan keys once ever 1/1000 of a second (with the exception of a blinky light.

[leonel]

Ok, i'll explain my secret weapon
I have 8 buttons that will control relays. One button corresponds to one relay. If it´is pressed i turn on the relay and stays on for 20s or 40s (depending the position of a switch). If one button is pressed while one relay is on the time goes to begin and the two relays stays on again 20s or 40s. On led is on if one relay is on...
Here´s my secret weapon
It was simple if i was using PIC16F872 (that´s the PIC i know better...)
My pulse it´s 200ms and the time it´s not critical (if i have 17s instead 20s that´s ok)

[Acetronics2]

ok ..something usable now ...