Beginner in need of help !!

[robbo78]

Thanks a lot for the help guys, I appreciate it I understand now how isr's work now.

Thanks,
Rob

[HenrikOlsson]

Hi,
Another aproach is to use the interrupt mechanism as a way to "latch" the buttonpress but then not actually enable the interrupt itself but instead poll the interrupt flag to determine if the button was pressed.

State VAR BYTE

Main:

    If INTCON.1 = 1 THEN    ' GP2 input interrupt
      INTCON.1 = 0   ' Clear flag
      State = State + 1
      If State = 3 THEN State = 0
    ENDIF

   SELECT CASE State

      Case 0
        HIGH LED
        PAUSE 50
        LOW LED
        PAUSE 50
  
      CASE 1
        HIGH LED
        PAUSE 100
        LOW LED
        PAUSE 100

      CASE 2
        HIGH LED
        PAUSE 150
        LOW LED
        PAUSE 150
GOTO MAIN

[robbo78]

Hi, I like that way as well. Although at some point I need to add a nap command with wdt off so it wakes when a voltage is higher than 0.60v & naps when voltage is less then, so I would have to use an interupt anyway at some point?

Thanks,
Rob