Guide: how to flash ATtiny13a based drivers (NANJG, QLITE, etc.) with custom firmware

[sbslider]

@goshdogit

The flash-85.sh file is located in ToyKeeper’s flashlight firmware depository inside the /bin folder. Its avrdude command reads:

avrdude -c usbasp -p t85 -u -U lfuse:w:0xe2:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m -Uflash:w:FILENAME.hex

Change FILENAME.hex to your .hex file’s name.

Note the ‘t85’ option. This sets the chip model to ATtiny85. Your example shows ‘t13’, which is erroneously specifying an ATtiny13.

I mentioned in your other thread that before sending your new firmware, you can test your connection between the ATtiny85 and your programmer with this command:

avrdude -p t85 -c usbasp -n

If the connection test is unsuccessful, you may need to fiddle with your clip. I have a cheap one that sometimes needs a couple of tries.

It looks like you’re getting close to a successful reflash. Keep at it, and keep us posted! :+1:

Hey goshdogit, thanks for all your help. I guess I really should have kept all this in one place, it would have helped me keep track of it.

I was able to connect using the ‘t13’ command, but got some minor errors. using the t85 came out a bit cleaner it seemed. I still get a warning about ‘cannot set sck period. please check usbasp for firmware update’, but the device signature comes out ok and I get the safemode Fuses ok message, much better. :+1:

I have been practicing with a demo board with a t85 chip on it before disassembling my D4. I connected the clip backwards to the demo board yesterday :person_facepalming: but it seems like it survived that.

After a couple of false starts on gettting ‘filename.hex’ correct, it looks like I successfully flashed the demo board.

Next step is my D4 . . .

success!!