Follow-up Comment #2, bug #34027 (project avrdude):
The problem appears to be the specific AT90S1200 requirements after a
chip erase operation. The datasheet says:
3. If a Chip Erase is performed (must be done to erase the Flash),
wait tWD_ERASE after the instruction, give RESET a positive pulse,
and start over from step 2. [...]
The latter is attempted by calling pgm->initialize again after the
chip erase, but that (obviously) doesn't relly release the /RESET line
as mandated by the datasheet.
As a workaround, separate the "chip erase" and "program device" steps
as follows:
. First, call AVRDUDE with the -e option to perform the chip erase
operation.
. Then, perform the actual programming using the -D option to prevent
AVRDUDE from executing the implied chip erase.
As already explained in a private email, accidentally erasing or
manipulating the signature bytes on the AT90S1200 could easily happen.
Use the -F option to override the signature check.
_______________________________________________________
Reply to this item at:
<http://savannah.nongnu.org/bugs/?34027>
_______________________________________________
Message sent via/by Savannah
http://savannah.nongnu.org/
_______________________________________________
avrdude-dev mailing list
[email protected]
https://lists.nongnu.org/mailman/listinfo/avrdude-dev
