hi all, i got some at90can128 that seems to be bricked.
I manage to progam many of these micro but these 9 i take using the same procedure (arduino ide, write bootloader ecc) does not work.
Can please someone suggest someting to try?
ty
throw to the trash can?
sure it is a way, the shame is that 9 of those cost me something like 200 euros so...
Do you have a crystal or resonator connected to the crystal oscillator pins when you try to program them? That may be necessary.
If the chip fuses have been programmed to use the Reset pin as a digital I/O pin or to disable serial programming, you will have to use High Voltage Serial Programming or High Voltage Parallel Programming to reset the chip fuses.
ty for your reply.
on the same board i manage to program whitout any issues many of these micro (like 50) but these 9 i have buy have never work. replaced whit other at90can128 from other surce on same board have 0 problem.
of course i have oscillator connected and as i say work perfectly exept whit these 9 micro.
I made some research coming to the parallel hi voltage programming to reset the fuses as you suggest too.
i found a project called fuse bit doctor that use a pretty simple hardware and a 328p.
the problem is that i can't found how to program the "doctor" (328p).
here the link to the repository:
this seem to be what i need but not a single word is spent to explain how i have to upload the .hex and .bin files.
i feel stupid but i'm going crazy but can't find a tutorial or so...