Presetting Configuration Fuses (PIC Defines) into your Program

[mister_e]

The 18F serie work different from the other. In the MPASM directory open the according .INC file. Look at the end you'll discover how to use the Config directive.

Free example here...

@ __CONFIG _CONFIG1H, _OSCS_OFF_1H & _HS_OSC_1H
    ' Oscillator switch OFF
    ' Use HS oscillator (20MHZ here)
    '
@ __CONFIG _CONFIG2L, _BOR_ON_2L & _PWRT_ON_2L & _BORV_45_2L
    ' Brown out reset ON @ 4.5Volts
    ' Power-up timer ON
    '
@ __CONFIG _CONFIG2H, _WDT_ON_2H 
    ' Watch dog timer ON
    '
@ __CONFIG _CONFIG4L, _STVR_ON_4L & _LVP_OFF_4L & _DEBUG_OFF_4L
    ' Stack over/underflow ON
    ' Low Voltage programming OFF
    ' Background debugger OFF

[eoasap]

Steve,

Once again you are my savior
Thanks alot for always helping me and guiding me in the right direction. your advice worked perfectly and i got the overwrite error which i see from your other post how to handle that.

Thanks so much

[mister_e]

If you are using any PIC18 serie, you will have this warning one day or another. Our friends from Microchip decide to change the way to define the config fuses when using the latest MPASM version 5.00.

The solution is still located at the same place... at the end of the 18XXXX.INC file located in the MPASM folder.

; IMPORTANT: For the PIC18 devices, the __CONFIG directive has been
; superseded by the CONFIG directive. The following settings
; are available for this device.
;
; Oscillator Selection:
; OSC = LP LP
; OSC = XT XT
; OSC = HS HS
; OSC = RC RC
; OSC = EC EC-OSC2 as Clock Out
; OSC = ECIO EC-OSC2 as RA6
; OSC = HSPLL HS-PLL Enabled
; OSC = RCIO RC-OSC2 as RA6

SO now the new method to set the config fuse on the PIC18 serie is...

@ CONFIG OSCS=OFF, OSC=HS
    ' Oscillator switch OFF
    ' Use HS oscillator (20MHZ here)
    '
@ CONFIG BOR=ON, PWRT=ON, BORV=45
    ' Brown out reset ON @ 4.5Volts
    ' Power-up timer ON
    '
@ CONFIG WDT=ON
    ' Watch dog timer ON
    '
@ CONFIG STVR=ON, LVP=OFF, DEBUG=OFF
    ' Stack over/underflow ON
    ' Low Voltage programming OFF
    ' Background debugger OFF

Or if you prefer...

ASM
    CONFIG OSCS=OFF  ; Oscillator switch OFF
    CONFIG OSC=HS    ; Use HS oscillator (20MHZ here)
    CONFIG BOR=ON    ; Brown out reset ON 
    CONFIG BORV=45   ; Brown out detect voltage=4.5 Volt
    CONFIG PWRT=ON   ; Power-up timer ON      
    CONFIG WDT=ON    ; Watch dog timer ON
    CONFIG STVR=ON   ; Stack over/underflow ON
    CONFIG LVP=OFF   ; Low Voltage programming OFF
    CONFIG DEBUG=OFF ; Background debugger OFF
    ENDASM

Don't forget to comment the default PBP config fuses...

[Tissy]

Nope can't get it going !!

I've used

@ CONFIG FOSC = HS

but it returns the error

__CONFIG directives cannot be used with CONFIG directives

I've even tried

@ CONFIG _CONFIG1H, _FOSC_HS_1H

which returns the same error as above and also,

@ __CONFIG _CONFIG1H, _FOSC_HS_1H

which returns two errors stating:
Overwriting previous address contents (0000)
Overwriting previous address contents (0001)

Any ideas?

[eoasap]

tissy, i just got the same thing you did. That's too bad because Steve's code looks so neat and orderly i personally would rather not use all the underscores and such.

[Tissy]

Right, i think i've figured this out.

You need to find the 18F2550.INC (or whatever device you are using) in the PicBasic Pro installation directory.

When you open that file it should look something like this:

;****************************************************************
;*  18F2550.INC                                                 *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2004 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 12/31/04                                        *
;*  Version   : 2.46                                            *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F2550, r = dec, w = -311, f = inhx32
        INCLUDE "P18F2550.INC"	; MPASM  Header
        __CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
        __CONFIG    _CONFIG1H, _FOSC_HS_1H
        __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_128_2H
        __CONFIG    _CONFIG3H, _PBADEN_OFF_3H
        __CONFIG    _CONFIG4L, _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_OFF_4L
        NOLIST
    endif
        LIST
EEPROM_START	EQU	0F00000h
BLOCK_SIZE	EQU	32

This is effectivly where you modify the fuses. The fuse definitions are contained within the P18F2550.INC as contained within your MPASMWIN directory.

*** Note: My advice would be to back any files up before any modifications ***

Hope this clears things up, it worked for me in the end. Now all the fuses are set without the need for modification each time.

Steve

[mister_e]

Just to make things clear for everybody. My solution work!!! As i said in my previous post don't forget to comment the PBP default fuse wich are located in the PBP folder in the according .INC file as Tissy found. So after the modification, Tissy's .INC file will looks like

;****************************************************************
;*  18F2550.INC                                                 *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2004 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 12/31/04                                        *
;*  Version   : 2.46                                            *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F2550, r = dec, w = -311, f = inhx32
        INCLUDE "P18F2550.INC"	; MPASM  Header
        ;__CONFIG    _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
        ;__CONFIG    _CONFIG1H, _FOSC_HS_1H
        ;__CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_128_2H
        ;__CONFIG    _CONFIG3H, _PBADEN_OFF_3H
        ;__CONFIG    _CONFIG4L, _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_OFF_4L
        NOLIST
    endif
        LIST
EEPROM_START	EQU	0F00000h
BLOCK_SIZE	EQU	32

If you don't comment the default fuses... you'll always have this Warning message + another like overwriting previous content..

Also be sure you have the latest MPASM version. 5.00 as now.

About now?