Need Help Flashing Atiny25 MTN FET + 3175

Flashlight Modding and DIY Parts
1

So I want to flash a different firmware onto my board. I bought all the things to do it and read through this guide:

https://budgetlightforum.com/t/-/30672

Only issue is that I am trying to flash a atin25 not a atiny13 chip.

The first thing to flash for bistro and similar firmwares is the battery check, run it , then the rest of the configuration stuff, check them etc. Then finally the actual firmware.

I copied the batterycheck-25 hex file out of the repository:

http://bazaar.launchpad.net/~toykeeper/flashlight-firmware/trunk/files/head:/ToyKeeper/battcheck/

I don't know how to get things to compile in atmel studio on windows so I was hoping I ould use the existing hex file. I found I can use gitBash for a shell and execute AVRdude on windows. There was a sentence about setting the correct fuse values based on the .c file, but I didn't really see anything for the atiny25 in the c file linked below.

http://bazaar.launchpad.net/~toykeeper/flashlight-firmware/trunk/view/head:/ToyKeeper/battcheck/battcheck.c

I used 0x75 and 0xFF when executing the command. It started to write to the chip but then error-ed out. Something like 0xFF expected but found something else. I figured I did something wrong so I want to delete the chip. but now I only get an error message, when trying to erase or check status.

Error is below:

https://www.irccloud.com/pastebin/yfvj6RuT/

Does this mean I bricked the driver? What did I do wrong?

2

This errors comes if the clip does not make proper contact

If you flash to attiny 25 you got to change that in code

3

Did you ever find a solution to this?

I made the same mistake of using the wrong fuse values while flashing my FT03.

4

You have probably bricked your mcu. This can be undone but at what cost just to unbrick it might not be worth it to you. I know it can be done with Arduino and maybe a stk500.

It would probably be the easiest, it would for me anyways, to just replace the mcu with a brand new one and make sure you set the right fuses. Replacing the mcu and flashing with the correct firmware and setting the correct fusees should make it like new.

5

Thanks for the quick reply. I was looking at HVP and I think you’re right. It’s going to be easier to just replace the mcu. Time to order a few attiny85’s