[bug #61624] [Feature request] Serial/UART UPDI programmers

[anonymous]

URL:
  <https://savannah.nongnu.org/bugs/?61624>

                 Summary: [Feature request] Serial/UART UPDI programmers
                 Project: AVR Downloader/UploaDEr
            Submitted by: None
            Submitted on: Mon 06 Dec 2021 11:57:08 AM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Hans
        Originator Email: hansibull@me.com
             Open/Closed: Open
                 Release: SVN snapshot
         Discussion Lock: Any
     Programmer hardware: serialupdi
             Device type: 

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Details:

I know this is a lot to ask, and I don't expect anyone to jump onto this
immediately because one guy would find this incredibly useful.

Avrdude now supports most UPDI compatible programming hardware, but the "last"
thing it lacks is the ability to program UPDI compatible AVRs using a serial
port and a resistor like used in pyupdi and pymcuprog.

https://github.com/mraardvark/pyupdi
https://github.com/microchip-pic-avr-tools/pymcuprog

A "Serial UPDI" programmer is pretty much the simplest programmer you can
make, and by controlling the DTR/RTS line while the UPDI communication is
active, one could easily create a neat programmer you can use for both
programming and serial debugging. I'm sure this feature would make UPDI
compatible AVRs even more appealing, especially since Avrdude is a binary file
that "just works" on all platforms, while a Python package isn't as simple.




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