New Convoy 7135 driver cannot be flashed

[giorgoskok]

Is this the old driver or the new one ?

Because new one has some issues :

They used wrong fuses :

New Convoy C8 – Clearly better

From the research I did on 5 sample drivers, it's the programming of the fuses that was done incorrectly. So the main problem is not hardware or firmware, but how manufacturing programmed the fuses, which in turn effects the firmware. They used these values: http://www.engbedded.com ATtiny13A LOW = 0x7A HIGH = 0xFF But they should have used: http://www.engbedded.com ATtiny13A LOW = 0x75 HIGH = 0xFF If you can follow those linked pages, the difference is doubling of the clock rate of the AT…

Also take a look here :

New Convoy C8 – Clearly better

Ok, feeling much more confident now that the grounding of pin #5 is why we cant get the USBASP programmer to flash firmware. I had the pin grounded on one driver - repeatedly tried, but could get it to connect. I was able to cut the trace from pin #5 clean, and now I am able to connect both with the black clip and blue clip. the MOSI signal used on pin #5 by the programmer is pretty critical. MOSI is output from the USBASP, and MISO (pin #6) is serial input to the USBASP. Interesting on a 105C…