Laten we bootloader firmware gaan maken voor de 18F25K20 met geconfigureerd voor interne oscillator voor 8Mhz.
De baudrate van de bootloader moet 19K2 worden.

In de onderstaande settings file kunnen alle lijnen met ;xxx in het commentaar worden aangepast.

De eerste die we tegenkomen is het device, 18F25K20 dus.

De volgende onder het vak “User Preference” die we tegenkomen is de oscillator frequentie, deze is belangrijk omdat hier de baudrate uit berekend gaat worden.
deze zetten we op 8000000 dus.
De verdere drie settings in het vak blijven we af.

In het vak “UART Settings” passen we alleen BAUDRATE aan, 19200 dus

Het vak “Advanced settings” laten we zoals het is.

Het “Configuration bits” vak vullen we zo in als we gewend zijn bij normale config setting.

;------------------------------------------------------------------------------
;
; Title:			ds30 Loader for PIC18F
;
; File description:	user settings and configuration bits
;
; Copyright: 		Copyright � 09-11, Mikael Gustafsson
;
; Webpage: 			http://mrmackey.no-ip.org/elektronik/ds30loader/
;
; History:			3.0.0 first version of this file
;                                                                             
;------------------------------------------------------------------------------

;------------------------------------------------------------------------------
;    This file is part of ds30 Loader.
;
;    ds30 Loader is free software: you can redistribute it and/or modify
;    it under the terms of the GNU General Public License as published by
;    the Free Software Foundation.
;
;    ds30 Loader is distributed in the hope that it will be useful,
;    but WITHOUT ANY WARRANTY; without even the implied warranty of
;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;    GNU General Public License for more details.
;
;    You should have received a copy of the GNU General Public License
;    along with ds30 Loader. If not, see .
;------------------------------------------------------------------------------



;------------------------------------------------------------------------------
; Device
;------------------------------------------------------------------------------
		processor	18F25K20          ;xxx


;------------------------------------------------------------------------------
; Includes
;------------------------------------------------------------------------------
        #include "devices.inc"


;------------------------------------------------------------------------------
; User preferences
;------------------------------------------------------------------------------
		radix DEC
		
		#define		OSCF               8000000    ;xxx oscillator frequency
		#define		BLINIT             2000       ;xxx hello receive timeout [ms]
		#define		HELLOTRIES         2          ;xxx number of non hello characters received before branching to the user application
		#define		BLTIME             2000       ;xxx data receive timeout [ms]


;------------------------------------------------------------------------------
; UART settings
;------------------------------------------------------------------------------			
		#define		USE_UART1		1			;xxx uncomment to use uart1
		;#define	USE_UART2		1			;xxx uncomment to use uart2
		#define		BAUDRATE	 	19200			;xxx baudrate
        	;#define	USE_ABAUD		1			;xxx uncomment to use auto baud rate detection, READ ERRATA FIRST        
		;#define	USE_BRG16		1			;xxx uncomment to use 16-bit brg
		;#define	USE_TXENABLE	1				;xxx uncomment to use a tx enable pin		
	#ifdef USE_TXENABLE
		#define	TRISR_TXE		TRISC				;xxx tris register containing tx enable
		#define	LATR_TXE		LATC				;xxx port register containing tx enable
		#define	TRISB_TXE		TRISC6				;xxx tris bit for tx enable
		#define LATB_TXE		RC6				;xxx port bit for tx enable
	#endif


;------------------------------------------------------------------------------
; CAN settings, commercial version only www.ds30loader.com
;------------------------------------------------------------------------------		
		

;------------------------------------------------------------------------------
; Security, commercial version only www.ds30loader.com
;------------------------------------------------------------------------------'


;------------------------------------------------------------------------------
; Advanced settings
;------------------------------------------------------------------------------		
		#define		PROT_GOTO		1				;xxx protect goto at 0x00
		#define		PROT_BL 		1				;xxx protect bootloader
		
		ifdef IS_PIC18F
				#define		BLPLP		8			;bootloader placement, pages from end
				#define		BLSIZEP		8			;bootloader size [pages], used by bootloader protection	
		endif
		
		ifdef IS_PIC18FJ		
				#define		BLPLP		2			;bootloader placement, pages from end
				#define		BLSIZEP		1			;bootloader size [pages], used by bootloader protection	
		endif
		

;------------------------------------------------------------------------------
; Configuration bits, these macros can be found at the end of the inc-files located in 
; C:\Program Files\Microchip\MPASM Suite\
;
; These can also be set in MPLAB IDE instead, they are found in Configure->Configuration bits...
;------------------------------------------------------------------------------
		
		; xxx
		
        CONFIG FOSC = INTIO67			;Interne oscillator, A6,A7 port fucties
    	;CONFIG FOSC = HS			;external oscillator
        ;CONFIG FOSC = HSMP                     ;external oscillator for 18F25K22 (4-16Mhz)
        CONFIG FCMEN = OFF			;Fail-Safe Clock Monitor disabled
    	CONFIG IESO = OFF			;internal external switchover mode
    	CONFIG PWRT = ON			;power-up timer
        ;CONFIG PWRTEN = ON                     ;power-up timer For 18F25K22
    	CONFIG BOREN = ON			;brown-out reset
    	CONFIG BORV = 27			;brown-out reset value (2,7V)
        ;CONFIG BORV = 285                     ;brown-out reset value (2,85V) for 18F25K22
    	CONFIG WDTEN = OFF			;watchdog timer
    	CONFIG WDTPS = 128			;1:128 WDT prescalar
    	CONFIG PBADEN = OFF			;analog port B<4:0> 
    	CONFIG STVREN = ON			;;stack overflow reset
    	CONFIG LVP = OFF			;low voltage programming
    	CONFIG XINST = OFF			;Instruction set extension and Indexed Addressing mode disabled (Legacy mode)
    	CONFIG DEBUG = OFF			;no debug
	CONFIG CCP2MX = PORTBE   	        ;CCP2 input/output is multiplexed with RB3
        ;CONFIG CCP2MX = PORTB3                 ;CCP2 input/output is multiplexed with RB3 For 18F25K22 
;------------------------------------------------------------------------------
; End of file
;------------------------------------------------------------------------------	

      

Voor de 18F25K22 moeten de fuse settingen (config) worden aangepast.