Using JTAG2UPDI

[maxgerhardt]

Actually that may be BS in this case, did you try the modification I originally wrote?

ATmega4808 upload via UPDI through jtag2updi

That is uhm, very weird. That is only half the rent, the other one is merging the bootloader.hex when creating the firmware hex. Both of this requires changes in the Python code of platform-atmelmegaavr (or an addition of a extra_script) and some knowledge of PlatformIO and SCOns. For example, in arduino.py, at e.g. line 76, you would have to add something like if build_core == "MegaCoreX": env.Append(LINKFLAGS=["-Wl,--section-start=.text=0x200"]) and then this would have to be addapted …