Bootloader For 18F4520

[ScaleRobotics]

Ok, this works for me. I'm using microcode stuidios 18f4550 20mhz hex bootloader file, and change the speed to 48mhz on the fly using Darrel's RTconfig.inc file.

Will post code tonight for a 18f4520

DEFINE OSC 48	' Lets work at 48 MHz with our 20mhz bootloader!
define LOADER_USED 1
@ #include "RTconfig.inc"  ;Darrel's write to configs while running inc
tempbyte var byte
redled		var PORTD.1

;----Change back to low speed for bootloader at reset
@  ReadConfig?CB  _CONFIG1L, _tempbyte    ; Read  CONFIG1L
tempbyte.0=1
tempbyte.1=1
@  WriteConfig?CB  _CONFIG1L, _tempbyte   ; Write CONFIG1L
@  ReadConfig?CB  _CONFIG1H, _tempbyte    ; Read  CONFIG1H
tempbyte.1=0
@  WriteConfig?CB  _CONFIG1H, _tempbyte   ; Write CONFIG1H

pause 1000   ; Give bootloader time to do it's thing 
;----Accelerate up to 48mhz for your code
@  ReadConfig?CB  _CONFIG1L, _tempbyte    ; Read  CONFIG1L
tempbyte.0=0
tempbyte.1=0
@  WriteConfig?CB  _CONFIG1L, _tempbyte   ; Write  CONFIG1L
@  ReadConfig?CB  _CONFIG1H, _tempbyte    ; Read  CONFIG1H
tempbyte.1=1
@  WriteConfig?CB  _CONFIG1H, _tempbyte

main:
	pause 500
	high redled
	pause 500
	low  redled
	goto main
end