Program tinyAVR 0 series automatically from an SD card

Hi everyone

I'm looking for a way to program a tinyAVR 0 series (specifically the ATTINY404) without the use of a computer. I'm currently programming it through the Arduino NANO as an UPDI programmer by using SpenceKonde's megaTinyCore.

My thinking is loading a binary file to an sd card and have an Arduino board (best case is the NANO itself) automated the process similar to how Adafruit_DAP library did with the M0.

Any idea on how to do this? Thanks in advance

arasamata:
I'm looking for a way to program a tinyAVR 0 series (specifically the ATTINY404) without the use of a computer.

Do you mean without a computer (Arduino's are computers) or do you mean without a PC?

Klaus_K:
Do you mean without a computer (Arduino's are computers) or do you mean without a PC?

I mean without a PC.

So, if you are already programming it through an Arduino Nano, you need to replace the commands send from the PC and control the process from the Nano itself.

I do not see any major issues for an experienced programmer except some dedication and time.

What stops you from trying to get this to work?