' Name        : BUTXU.pbp
' Compiler    : PICBASIC PRO Compiler 2.6
' Assembler   : MPASM
' Target PIC  : PIC18F4550 or similar type
' Hardware    : LAB-XUSB Experimenter Board
' Oscillator  : 20MHz external
' Keywords    : LCDOUT
' Description : PICBASIC PRO program to show button press on LED.
'

' Define LOADER_USED to allow use of the boot loader.
' This will not affect normal program operation.
Define LOADER_USED 1

' RESET_ORG can be set to move the BASIC program out of the way
' of any boot loader running from location 0, such as the
' Microchip USB boot loader
'Define RESET_ORG 800h

Define OSC 48           ' Core is running at 48MHz

   INTCON2.7 = 0        ' Enable PORTB pull-ups
   TRISD = 0            ' Set PORTD (LEDs) to all output

mainloop:
   PORTB = 0            ' PORTB lines low to read buttons
   TRISB = $f0          ' Enable all buttons
   PORTD = 0            ' All LEDs off

   ' Check any button pressed to turn on LED
   If PORTB.7 = 0 Then ' If 4th button pressed...
      PORTD.3 = 1      ' 4th LED on
   Endif
   If PORTB.6 = 0 Then ' If 3rd button pressed...
      PORTD.2 = 1      ' 3rd LED on
   Endif
   If PORTB.5 = 0 Then ' If 2nd button pressed...
      PORTD.1 = 1      ' 2nd LED on
   Endif
   If PORTB.4 = 0 Then ' If 1st button pressed...
      PORTD.0 = 1      ' 1st LED on
   Endif
   Goto mainloop       ' Do it forever

   End