PIC16F819 LED not blinking

[Bruce]

Your config options have ZERO effect on actual config settings.

@__Config_INTRC_OSC 
@__Config_PWRT_OFF
@__Config_MCLR_OFF
@__Config_BOREN_OFF
@__Config_DEBUG_OFF

So your config settings are whatever the default config options are set to in your
PBP 16F819.INC file for the MPASM assembler.

And, like Melanie mentioned, you for sure will want the WDT disabled since DEFINE OSC 3
is for a 3MHz osc & not 32kHz osc, so your timing is way off.

Try this just to verify it's working;

DEFINE OSC 4 
@ __CONFIG _INTRC_IO & _WDT_OFF & _PWRTE_OFF & _LVP_OFF & _MCLR_OFF & _BODEN_OFF & _DEBUG_OFF
OSCCON = %01100000  ' 4MHz 
ADCON1=7 
TRISA = %00000000 
TRISB = %00000000 
TRISB.4 = 0 
TRISA.0 = 0 
PORTA.0 = 0 
PORTB.4 = 0 

LOOP: 

PULSOUT PORTB.4,20 
PAUSE 20
PULSOUT PORTA.0,20 
PAUSE 20 

Goto LOOP

And, for PBP 2.6 you'll want to change LOOP to something like LOOPS since LOOP is now a
reserved word.

[ronbowalker]

@ __CONFIG _INTRC_IO & _WDT_OFF & _PWRTE_OFF & _LVP_OFF & _MCLR_OFF & _BODEN_OFF

This gives me illegal character "&" error message......asm.51

So I need to go and make these settings permanent in MPASM file to keep from having to make this statement, correct?

Also, datasheet (DS39598E)2004 shows:
A. WDT is WDTEN (Watchdog Timer)
B. MCLR is MCLRE (Memory Clear)
C. BODEN is BOREN (Brown-Out)

Is this correct?
Thanks for the info Bruce....I appreciate all the help I can get.
I will try to change the file settings...can you tell me what to have for pic16f819.inc file, I think I messed mine up.
Here is mine:
;************************************************* ***************
;* 16F819.INC *
;* *
;* By : Leonard Zerman, Jeff Schmoyer *
;* Notice : Copyright (c) 2004 microEngineering Labs, Inc. *
;* All Rights Reserved *
;* Date : 01/07/04 *
;* Version : 2.45 *
;* Notes : *
;************************************************* ***************
NOLIST
ifdef PM_USED
LIST
include 'M16F81x.INC' ; PM header
device pic16F819, intrc_IO, wdt_off, pwrte_off, lvp_off, protect_off
XALL
NOLIST
else
LIST
LIST p = 16F819, r = dec, w = -302
INCLUDE "P16F819.INC" ; MPASM Header
__config _INTRC_osc & _WDT_OFF & _PWRTE_ON & _LVP_OFF & _CP_OFF
NOLIST
endif
LIST

[Bruce]

This gives me illegal character "&" error message......asm.51

I have no clue what this error message is. What assembler are you using?

asm.51

Almost looks like you're trying to use an 8051 assembler?

[ronbowalker]

I am using PICBASIC PRO from MicroCode Studio.

In the settings window, I have selected the MPASM assembler checkbox.

This is all I know. I reset the .inc file to where is was originally. Here it is....

;************************************************* ***************
;* 16F819.INC *
;* *
;* By : Leonard Zerman, Jeff Schmoyer *
;* Notice : Copyright (c) 2004 microEngineering Labs, Inc. *
;* All Rights Reserved *
;* Date : 01/07/04 *
;* Version : 2.45 *
;* Notes : *
;************************************************* ***************
NOLIST
ifdef PM_USED
LIST
include 'M16F81x.INC' ; PM header
device pic16F819, hs_osc, wdt_off, pwrt_off, lvp_off, protect_off
XALL
NOLIST
else
LIST
LIST p = 16F819, r = dec, w = -302
INCLUDE "P16F819.INC" ; MPASM Header
__config _HS_OSC & _WDT_OFF & _PWRTE_ON & _LVP_OFF & _CP_OFF
NOLIST
endif
LIST

I have been trying to get this MPASM Header, the way you wrote it, to compile correctly all day, but it still gives me errors.

[ronbowalker]

This compiles without error.....

@__CONFIG_HS_OSC_WDT_OFF_PWRTE_ON

But more than this will cause a "Label truncated at 32 characters" error.

[Bruce]

Try the config line I posted above. What you're trying to do here isn't any good.

[ronbowalker]

Try the config line I posted above. What you're trying to do here isn't any good.

Okay...I now understand what is to be done, and the changes were made as you said to the .inc file. Compile is now error free. Pop-up window settings are now as per your suggestion. Sorry for the crazy rookie mistakes. Let's see what happens now....

Update...LED is on steady. No blinking

[Bruce]

If you prefer to edit your 16F819.INC file, then just change it to;

__CONFIG _INTRC_IO & _WDT_OFF & _PWRTE_OFF & _LVP_OFF & _MCLR_OFF & _BODEN_OFF & _DEBUG_OFF

If not, then just comment it out in the .INC file & add your config settings to your code.

Melanie posted a nice intro here http://www.picbasic.co.uk/forum/showthread.php?t=543 on setting config options.

NOTE: This applies only to the 16F819.INC file in your PBP directory. Not the P16F819.INC
file in your MPLAB directory. These are different. You shouldn't ever need to modify the
P16F819.INC file in your MPLAB directory.