Conditional default config's

[mackrackit]

I have not tried it with configs but an include file might work.

[cncmachineguy]

I have been trying this:

ifdef DCFG
  LIST
        __CONFIG    _CONFIG1L, _CPUDIV_NOCLKDIV_1L & _USBDIV_OFF_1L
        __CONFIG    _CONFIG1H, _FOSC_HS_1H & _PLLEN_OFF_1H & _PCLKEN_ON_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
        __CONFIG    _CONFIG2H, _WDTEN_ON_2H & _WDTPS_512_2H
endif

then in my program

DEFINE DCFG 1

the most I can figure is the DEFINE is not being passed to the .INC file. So either it can't , or I just don't know how to do it. I am hoping I just don't know how yet.
Now I am pretty sure this will always evaluate false as I never get the overwrite error. If i change to

ifndef DCFG

I always get the error. So I think the code added to the .INC works, just have no way to pass DCFG

[Darrel Taylor]

Bert,

Comment out the default configs in the .inc file like normal.

;****************************************************************
;*  18F4520.INC                                                 *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2010 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 05/21/10                                        *
;*  Version   : 2.60a                                           *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        "Error: PM does not support this device.  Use MPASM."
        NOLIST
    else
        LIST
        LIST p = 18F4520, r = dec, w = -311, w = -230, f = inhx32
        INCLUDE "P18F4520.INC"   ; MPASM  Header
;        __CONFIG    _CONFIG1H, _OSC_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
;        __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
;        __CONFIG    _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
;        __CONFIG    _CONFIG4L,  _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
        NOLIST
    endif
        LIST
EEPROM_START EQU 0F00000h
BLOCK_SIZE EQU 32

Copy the defaults or create your own in a .cfg file like this ...

18F4520.cfg

ASM
  ifndef CONFIGOVERRIDE
    __CONFIG    _CONFIG1H, _OSC_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
    __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
    __CONFIG    _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
    __CONFIG    _CONFIG4L,  _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
  endif
ENDASM

INCLUDE that file from the .bas file

'****************************************************************
'*  18F4520.BAS                                                 *
'*                                                              *
'*  By        : Leonard Zerman, Jeff Schmoyer                   *
'*  Notice    : Copyright (c) 2004 microEngineering Labs, Inc.  *
'*              All Rights Reserved                             *
'*  Date      : 12/29/04                                        *
'*  Version   : 2.46                                            *
'*  Notes     :                                                 *
'****************************************************************
BANKA   $0000, $007F
BANK0   $0080, $00FF
BANK1   $0100, $01FF
BANK2   $0200, $02FF
BANK3   $0300, $03FF
BANK4   $0400, $04FF
BANK5   $0500, $05FF
'EEPROM  $F00000, $F000FF
LIBRARY "PBPPIC18"
        include "PIC18EXT.BAS"
PORTL   VAR     PORTB
PORTH   VAR     PORTC
TRISL   VAR     TRISB
TRISH   VAR     TRISC
        include "PBPPIC18.RAM"
        include "18F4520.cfg"
'*----------------------* EOF 18F4520.BAS *---------------------*

Then in your main program, you can do what you wanted.

DEFINE CONFIGOVERRIDE
ASM
    __CONFIG    _CONFIG1H, _OSC_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
    __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
    __CONFIG    _CONFIG3H, _CCP2MX_PORTC_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
    __CONFIG    _CONFIG4L,  _STVREN_ON_4L & _LVP_OFF_4L & _XINST_OFF_4L
ENDASM

HTH,

[cncmachineguy]

Thanks Darrel. I suppose that is what Dave was pointing at, but I didn't get it. That will do what I want, (be able to use defaults conditionally). So we CAN pass things to the .BAS just not the .INC?

Now to refresh the python skills or work on liberty basic and parse the files so I can be lazy and not do it by hand. OK I know it will be far easier to just open the files and change them. But what will I learn that way??

[mackrackit]

That is not what I was thinking.
I did not know
DEFINE CONFIGOVERRIDE
even existed.

Thanks Darrel!

[cncmachineguy]

Hi Dave,
I don't think

DEFINE CONFIGOVERIDE

is a pre existing anything. I think it could have been

DEFINE BERTISLAZY

and have the same effect. In the .CFG file, the

ifndef CONFIGOVERIDE
or
ifndef BERTISLAZY

tells PBP or MPASM (not clear here) to see if the DEFINE exists. If not then do the following code. If it does exist then endif.

I am going to have a play with this and verify this is how it works. I will report back if anyone is intrested.

BTW, the reason I want this is so I can test forum code that uses the default config's, without having to change things all the time for my own code.

[mackrackit]

I will report back if anyone is intrested.

I am interested.

[Darrel Taylor]

So we CAN pass things to the .BAS just not the .INC?
...
tells PBP or MPASM (not clear here) to see if the DEFINE exists. If not then do the following code. If it does exist then endif.

DEFINE's are currently only passed on to the assembler unchanged, and do not directly affect PBP code.

Those DEFINES are added to the ASM after the .inc file, but before the .bas file.
This allows them to affect the library code that is included from the .bas file, but the items in the .inc file have already been processed.

The example above was for an 18F.
For a 16F, the .cfg file should be a little different

' -- 16F877a.cfg --
ASM
  ifndef PM_USED
    ifndef CONFIGOVERRIDE
      __config _XT_OSC & _WDT_ON & _LVP_OFF & _CP_OFF
    endif
  endif
ENDASM

The usage in the main program is essentially the same.

DEFINE CONFIGOVERRIDE
@      __config _HS_OSC & _WDT_ON & _LVP_OFF & _CP_OFF

A better method has been developed by Charles and Leonard that allows defaults to be overridden automatically, and the new style CONFIG statements to be used in your programs as well.
It will be available in the coming months, so you may not want to spend to much time editing all the files.