What do I need for programming ATtiny25?

[wight]

@Cereal_killer

It’s a wider body but it may fit on the 13A pad’s (you’d just have to measure to know) the FW will take some work porting it over, the registers are different (even if the pin’s are the same) so its more than just copying it into a new project (but you probably know this) They’re very similar devices, both the same AVR family, so they share lots of stuff, porting wont be difficult, but they are different and the code is specific to them, you cant just put STAR on one and have it run, it’ll be a bigger part of the project that the board is.

As for programming it, you already have everything you need. All it takes is different fuse settings and a slightly different command string.

It’s not a wider body, the 25 is available in both 150mil and 208mil (208mil is the larger size you are referring to - that’s what the 45/85 use).

@Mike C

A bit of work I can see. I’m probably not up to the task.

Are there any other options where info specifically for programming flashlight drivers is available?

JonnyC is planning to port STAR to the ATtiny25. Other capable minds are also on the matter even if they are not currently working on it (ToyKeeper for one).

I think it would be safe to pick up an ATtiny25 or two and be ready for new firmwares when they arrive.

To answer your question more directly: not really - microcontrollers all have the obstacles which RMM described. The only other MCUs I’m aware of which have publicly demonstrated flashlight code would be the handful of PIC MCU’s tterev3 discusses over here: tterev3’s PIC quickstart guide