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Trouble with configurations bits on 16f688

 
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aloizeau
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Trouble with configurations bits on 16f688
PostPosted: Wed Dec 29, 2004 10:42 am     Reply with quote
Hello

I'm using a 16f688 for a simple keyboard application and I have problems with the fuses configuration.
Actually, the configuration I set in the C file is not the same that I obtain in the list file...
Is it possible to set the configuation bits without the directive #fuses and without Mplab with pcm? I've already tried to insert the configuration with asm directives but it doesn' work...

I am using PCM(v3.214) under Mplab v6.60.

Thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Dec 29, 2004 12:58 pm     Reply with quote
Post your #fuses statement. In fact, post a complete (but short)
program that demonstrates the problem.
aloizeau
Guest
PostPosted: Thu Dec 30, 2004 12:31 pm     Reply with quote
My #fuses statement is:
#include <16F688.h>
#FUSES INTRC_IO,NOWDT,NOPUT,BROWNOUT_NOSL,NOPROTECT,IESO,FCMEN,NOCPD
and the results in the .lst is:
Word 1: 34E4 INTRC_IO NOPROTECT NOBROWNOUT MCLR NOCPD NOWDT PUT IESO NOFCMEN
The value should be 3FF4 instead of 34E4...
From what I read, the configuration bits are independant from the code, so I don't think it's necessary to put any ohter part of my code... And I don't think it's a problem of configuration because this statement works with CC5...

Thanks for your help!
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Dec 30, 2004 1:48 pm     Reply with quote
I compiled the following test program with PCM 3.214:
Code:
#include <16F688.h>
#FUSES INTRC_IO,NOWDT,NOPUT,BROWNOUT_NOSL,NOPROTECT,IESO,FCMEN,NOCPD

void main()
{

while(1);
}

I got this result in the .LST file:
Code:
Configuration Fuses:
Word  1: 3EF4   INTRC_IO NOPROTECT MCLR NOCPD NOWDT NOPUT
                  IESO FCMEN BROWNOUT_NOSL

I compared that Config Word to the data sheet (Section 11.1) and it looks correct.
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