' Name        : BUTX3.pbp
' Compiler    : PICBASIC PRO Compiler 2.6
' Assembler   : PM or MPASM
' Target PIC  : PIC16F627A or similar 18-pin type compatible with LAB-X3 board
' Hardware    : LAB-X3 Experimenter Board
' Oscillator  : 4MHz external crystal
' Keywords    : IF THEN
' Description : PICBASIC PRO program to show button press on LED.
'

    CMCON = 7          ' PORTA to digital
    OPTION_REG = $7f   ' Enable PORTB pull-ups
    TRISB = %11001111  ' Set PORTB.4,5 (LEDs) to output, rest to input

mainloop:
   PORTB = 0           ' Turn off LEDs

   ' Check any button pressed to toggle on LED
   If PORTB.7 = 0 Then ' If 1st button pressed...
      PORTB.4 = 1      ' Turn on 1st LED
   Endif
   If PORTA.5 = 0 Then ' If 2nd button pressed...
      PORTB.5 = 1      ' Turn on 2nd LED
   Endif

   Pause 2             ' Pause 2mS
   Goto mainloop       ' Do it forever

   End