' =========================================================================
'   File....... SW21-EX01-Flash_LED.SXB
'   Purpose.... Simple LED Flasher
'   Author..... (C) 2000 - 2005, Parallax, Inc.
'   E-mail..... support@parallax.com
'   Started.... 01 SEP 2005
'   Updated.... 23 MAR 2007 by TSaavik for SX28
' =========================================================================

' -----[ Program Description ]---------------------------------------------
'
' Flashes an LED connected to RB.4.  This program will work, unmodified, on
' the SX28.
' -------------------------------------------------------------------------

'------{ Device Settings ]-------------------------------------------------

DEVICE 		SX28,TURBO,BANKS8,OSCHS3,SYNC,OPTIONX
FREQ            50_000_000
ID		"EX01"
' -----[ I/O Definitions ]-------------------------------------------------

AlarmLed        PIN     RB.4                    ' LED on RB.4

' -----[ Constants ]-------------------------------------------------------

FlashTm         CON     500                     ' delay 500 milliseconds
'FlashTm         CON     1                     ' delay 1 milliseconds for sxsim

' -----[ Initialization ]-------------------------------------------------
PROGRAM Main

' -----[ Program Code ]----------------------------------------------------

Main:
  HIGH AlarmLed                                 ' turn the LED on
  PAUSE FlashTm
  LOW AlarmLed                                  ' turn the LED off
  PAUSE FlashTm
  GOTO Main