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