[Usbpicprog-technical] config word programming

[Gábor H. <gab...@gm...>]

Hi Everyone,

My question is not strictly related to usbpicprog, but I am hoping that
someone here has faced similar issue.
As a 'side' project of an other project, I thought I create a simple
programmer to PIC18F46K22 (I have a demo board with PIC18F45K22 equipped
with bootloader, which I am using for programming). Everything went fine -
I was able to read/write program memory and read config words - until I
reached the point where config words had to be written. After I created it
and tested with a PIC, it seems that I bricked the mcu, because from that
point, I can not do anything with the PIC (always read zeroes for all
addresses).
I don't know what could have went wrong, since config word programming
differs only in a few things from program memory programming (which works
fine, and the fact is that I actually seem to have bricked two PICs
already). My concrete question is: could this problem have been caused by
trying to write config BYTES separately (not as words)? Has anyone faced
similar problem?

Thanks and Regards,
Gabor