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Dear Jorge
Hi,
as a reply of your message:
You mentioned that your are using IC_Prog and
JDM Programmer, and have trouble with Code Protect:
Normally to reprogram a protected PIC you should first
remove the CP option in the Fuses and program config (F4). And as mentioned
in the datasheet given by ftp://ftp.microchip.com
this procedure should erase the entire information from
your PIC.
If you still find 0000 while trying to read this PIC,
then the problem is due to the JDM programmer design.
While JDM
programmer takes it's programming voltage from the COM
Port.
My experiance teached me that you can't
remove a PIC protecion using this simple JDM programmer cause of its low power specification.
I had have the same trouble using
16F84.
And I used willem Prog found on this site
http://www.geocities.com/mpu51/ to remove the PIC code
protecion.
this programmer can work on IC-Prog and it has also
it's special program (Willem Eprom Prog)
I mean you should use a programmer which has an external
power supply. because removing the PC code takes more than usual power generated
from the COM Port.
Finally, It's better to turn around this trouble by
programming the PIC without Code Protection, trying it then code protect
the PIC by programming the config byte by setting the PC Fuses using the
simple IC_Prog & JDM programmer and then hit (F4).
If you are sure about your PIC program, and need to
verify the write option and code protect the chip in the same time, then
it's better to select the verify during write, or you can't verify
that PIC. and the PC code protect will return 0000, as an illegal error
message.
I wish if my hints were helpful for you.
If anyone have the newest
version of PIC BASIC Pro then help me.
You can visit my site on
www.dentist.20fr.com
But don't be astonished
Because this is my hobby.
Cheers,
This is the main message:
> Date: Fri, 14 Mar 2003
19:51:28 -0000
> From: "jartieda" <j...@iies.es> > Subject: pic 18fxx2 icprog and jdm >Im trying to program 18f452 with ic-prog and jdm programmer. but i'm >not sure about if i have to fill the config words manually in ic-prog >as when I load the program they are all set to 0000. i think that im >write it code protected and thats why it fails to verify. can this be >corret? >any body can tell me if has programed 18fxx usin this hardware? >thanks >jorge artieda |