16F726 configuration

[Byte_Butcher]

I'm trying to get through the fuse configuration on a 16F726....

I've read Melanie's post "Presetting Configuration Fuses (PIC Defines) into your Program " a bunch of times, I've got the 16F726 data sheet open and have read the section on Device Configuration repeatedly, and I've got the M16F72X.INC open so I can see the list of fuse definitions... but I'm still confused.

When I try to set some of the fuse definitions, I get an error that says "Symbol not previously defined "

For example, Here I try and set some of the stuff in the CONFIG1 register:

@ __config _CONFIG1, _INTOSCIO & _DEBUG_OFF & _WDT_OFF & _CP_OFF & _MCLR_OFF & _PLL_ON

which returns 2 errors:
"Symbol not previously defined (_MCLR_OFF )"
"Symbol not previously defined (_PLL_ON)"


If I look at the M16F72X.INC file, it sure LOOKS like MCLR_OFF and PLL_ON are defined..?

					; *** DEVICE Fuses Definitions
EXTRC_OSC_CLKOUT equ    3FF80007h       ; XX XXXX XXXX X111
EXTRC_OSC_NOCLKOUT equ  3FF80006h       ; XX XXXX XXXX X110
EXTRCIO         equ     3FF80006h       ; XX XXXX XXXX X110
EXTRC           equ     3FF80006h       ; XX XXXX XXXX X110
INTRC_OSC_CLKOUT equ    3FF80005h       ; XX XXXX XXXX X101
INTRC_OSC_NOCLKOUT equ  3FF80004h       ; XX XXXX XXXX X100
INTOSCIO        equ     3FF80004h       ; XX XXXX XXXX X100
INTOSC          equ     3FF80004h       ; XX XXXX XXXX X100
EC_OSC          equ     3FF80003h       ; XX XXXX XXXX X011
HS_OSC          equ     3FF80002h       ; XX XXXX XXXX X010
XT_OSC          equ     3FF80001h       ; XX XXXX XXXX X001
LP_OSC          equ     3FF80000h       ; XX XXXX XXXX X000
WDT_ON          equ     3FF70008h       ; XX XXXX XXXX 1XXX
WDT_OFF         equ     3FF70000h       ; XX XXXX XXXX 0XXX
PWRT_ON         equ     3FEF0000h       ; XX XXXX XXX0 XXXX
PWRT_OFF        equ     3FEF0010h       ; XX XXXX XXX1 XXXX
MCLR_ON         equ     3FDF0020h       ; XX XXXX XX1X XXXX
MCLR_OFF        equ     3FDF0000h       ; XX XXXX XX0X XXXX
PROTECT_ON      equ     3FBF0000h       ; XX XXXX X0XX XXXX
PROTECT_OFF     equ     3FBF0040h       ; XX XXXX X1XX XXXX
BOD_ON          equ     3CFF0300h       ; XX XX11 XXXX XXXX
BOD_NSLEEP      equ     3CFF0100h       ; XX XX01 XXXX XXXX
BOD_OFF         equ     3CFF0000h       ; XX XX00 XXXX XXXX
BORV_19         equ     3BFF4000h       ; XX X1XX XXXX XXXX
BORV_25         equ     3BFF0000h       ; XX X0XX XXXX XXXX
PLL_ON          equ     2FFF0000h       ; X0 XXXX XXXX XXXX
PLL_OFF         equ     2FFF1000h       ; X1 XXXX XXXX XXXX
DEBUG_ON        equ     1FFF0000h       ; 0X XXXX XXXX XXXX
DEBUG_OFF       equ     1FFF2000h       ; 1X XXXX XXXX XXXX

					; *** DEVICE2 Fuses Definitions
VCAP_OFF	equ     3FCF0030h       ; XX XXXX XX11 XXXX
VCAP_RA6	equ     3FCF0020h       ; XX XXXX XX10 XXXX
VCAP_RA5	equ     3FCF0010h       ; XX XXXX XX01 XXXX
VCAP_RA0	equ     3FCF0000h       ; XX XXXX XX00 XXXX

Also, I thought I would be able to use this to set the configuration:

@ DEVICE pic16F726, INTOSCIO
@ DEVICE pic16F726, DEBUG_OFF
@ DEVICE pic16F726, WDT_OFF

but I get error messages about "Found label after column 1. (DEVICE)
and:
"Illegal Opcode (pic16F726)

I feel totally lost and bewildered...
Anyone willing to help point me in the right direction? Please?

FWIW, here's my little bit of test code. I've finally got it to display my sample text, but I still don't understand why I'm unable to set some of the config stuff...

                                                                                                  
'****************************************************************
'****************************************************************

@  __config _CONFIG1, _INTOSCIO & _DEBUG_OFF & _WDT_OFF & _MCLR_OFF & _PLL_ON
@  __config _CONFIG2, _VCAP_RA0

'@ DEVICE pic16F726, INTOSCIO      'Why did this return an error?
'@ DEVICE pic16F726, DEBUG_OFF     'Why did this return an error?
'@ DEVICE pic16F726, WDT_OFF       'Why did this return an error?


Include "MODEDEFS.BAS"   ' Include Shiftin/out modes
DEFINE LCD_DREG PORTA    ' Set LCD Data port
DEFINE LCD_DBIT 4        ' Set starting Data bit (0 or 4) if 4-bit bus
DEFINE LCD_RSREG PORTA   ' Set LCD Register Select port
DEFINE LCD_RSBIT 2       ' Set LCD Register Select bit
DEFINE LCD_EREG PORTC    ' Set LCD Enable port
DEFINE LCD_EBIT 0        ' Set LCD Enable bit
DEFINE LCD_BITS 4        ' Set LCD bus size (4 or 8 bits)

TRISA= %00000000    'Set 'em all to outputs
TRISB= %00000000	'Set portB 
TRISC= %00000000    'Set portC all outputs
    
ANSELA= %00000000	 ' Set all pins to digital...
ANSELB= %00000000   ' Set all pins to digital

pause 200  'Give the LCD a chance to wake up
Lcdout $fe,1

gosub mainloop
       
display: '!!!!!!!!----Display something on LCD 

        Lcdout $fe,2," Hey! WTF?",$fe,$C0," Anybody home?"
        return          
        
'----------------------------------         
mainloop: 
        gosub display
        Pause 100      ' slow things down a bit to keep everyone from freaking out               
        Goto mainloop   ' repeat until nauseated...

        return

        End

Thanks,

Steve

[Darrel Taylor]

but I get error messages about "Found label after column 1. (DEVICE)

That error indicates you are using MPASM as the assembler.

In which case you need the P16F726.INC in the "C:\Program Files\Microchip\MPASM Suite" folder.

In that file you'll find ...

_MCLRE_OFF

-- and --

_PLL_EN

hth,

[Byte_Butcher]

Thank you Darrel, that helped immensely.

This is all a steep learning curve for me. So many manuals and data sheets to read and *understand*. Sometimes I feel like I'm making great leaps forward learning this stuff, and other times I just feel dumb as a rock...

Thanks very much for your help!


steve