' Name        : BLINK4XU.pbp
' Compiler    : PICBASIC PRO Compiler 2.6
' Assembler   : MPASM
' Target PIC  : PIC18F4550 or similar type
' Hardware    : LAB-XUSB Experimenter Board
' Oscillator  : 20MHz external
' Keywords    : FOR NEXT
' Description : PICBASIC PRO program to blink all the LEDs
' connected to PORTD.
'

' 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

i    Var Byte           ' Define loop variable
LEDS Var PORTD          ' Alias PORTD to LEDS

   TRISD = %00000000    ' Set PORTD to all output

mainloop:
   LEDS = 1             ' First LED on
   Pause 500            ' Delay for .5 seconds

   For i = 1 To 3       ' Go through For..Next loop 3 times
     LEDS = LEDS << 1   ' Shift on LED one to left
     Pause 500  ' Delay for .5 seconds
   Next i
   Goto mainloop        ' Go back to loop and blink LED forever

   End