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PICList Thread
'[PIC]: Removing Code Protection'
2002\01\03@234633 by Omer Can Sirikci

picon face
Hi All,

Happy New Year to everyone.

I am new to PICs. I have recently purchased a PIC Programmer called "Newfound Warp-13 PIC
Programmer" from Dontronics in AUS. It is compatable with MPLAB. I have also purchased four
16F876-20 MCUs for $27.00AUD each, bit expensive I think ....

Anyway, I have been trying to read and write some hex code that I have found on the Internet and
playing around with the different options on the program that was supplied with the programmer as
well as MPLAB. I have "code protected" one of the PICs. Now I can not use it.

Could anyone tell me if there is a method to remove that?

I think I need to do some tutorials. Could you please also tell me if there is a good web site and
what book/s you would recommend?

Cheers and thanks in advance. :-)

Omer Can

=====
Kind Regards,
Omer Can Sirikci B.E.(Electrical)
ATACOM
ABN 34 815 089 861
24 Susan Street, AUBURN NSW 2144
Phone: 0418 695 766
e-mail: spam_OUTomercanTakeThisOuTspamyahoo.com

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2002\01\03@235057 by David Dunn

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what PIC is it ? if it's a flash part, you'll have to do a bulk erase on it to get it un protected.

dld

On Thu, 3 Jan 2002 20:35:29 -0800, Omer Can Sirikci wrote:

{Quote hidden}

David Dunn
Digital Racing Products

davespamKILLspamdigitalracingproducts.com
http://www.digitalracingproducts.com

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2002\01\04@005100 by Riaz Ahamed

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Hi David,

 A newbie question : How do we "bulk erase" this chip ..

Thanks
Riaz

David Dunn wrote:
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2002\01\04@020654 by dr. Imre Bartfai

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Hi,

on some sort of programmers (e. g. which I use: that of B. Dobaj) it is
absolutely nothing. Simply reprogram the chip. Bulk-erasing will be done
automagically, immediately before the programming process.

Regards,
Imre


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On Fri, 4 Jan 2002, Riaz Ahamed wrote:

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2002\01\04@112707 by Fabio Pereira

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> I am new to PICs. I have recently purchased a PIC Programmer called
"Newfound Warp-13 PIC
> Programmer" from Dontronics in AUS. It is compatable with MPLAB. I have
also purchased four
> 16F876-20 MCUs for $27.00AUD each, bit expensive I think ....
>
> Anyway, I have been trying to read and write some hex code that I have
found on the Internet and
> playing around with the different options on the program that was supplied
with the programmer as
> well as MPLAB. I have "code protected" one of the PICs. Now I can not use
it.
>
> Could anyone tell me if there is a method to remove that?
>
> I think I need to do some tutorials. Could you please also tell me if
there is a good web site and
> what book/s you would recommend?
>
> Cheers and thanks in advance. :-)
>

I use the JDM programmer, low cost (about 5 bucks) and compatible with all
PIC 16 and 12 series ...
But in your case, I think you should try the Erase Program Memory in the
PICstart menu in MPLAB ....

Fabio Pereira

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2002\01\06@185619 by Omer Can Sirikci

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David,

It is a 16F876. How do you do a bulk erase on MPLAB. I have been trying to figure out what I did
to code protect it and it says "code protection all" does it mean that the chip is useless and I
can not use it anymore. My understanding from the data sheet that there are three memory areas
that can be protected; these are data memory, program memory and EE (flash) memory and these are
set with the appropriate confid ID bits. I was fiddeling around with these and protected the lot.

I'll get you the actual config ID for you tonight and e-mail it tomorrow, I just do not have it on
me at the moment.

Cheers.


{Original Message removed}

2002\01\06@192749 by Jeff DeMaagd

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On the "F" parts, you only need to reprogram the chip without code
protection.  You should be able to hit "program" to reprogram the
chip.  The code protect bits are set in the source code file or in the
"configuration bits", it should be in the same general menu as setting
which clock method you are using, power on timer, etc.

Jeff

At 03:54 PM 1/6/02 -0800, you wrote:
>David,
>
>It is a 16F876. How do you do a bulk erase on MPLAB. I have been trying to
>figure out what I did
>to code protect it and it says "code protection all" does it mean that the
>chip is useless and I
>can not use it anymore. My understanding from the data sheet that there
>are three memory areas

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