This is slightly disappointing, since the milkv-duo platform is generally well-opened, well-documented and devoid of blobs: and I’ve been trying to boost it to a journalist friend who I’m inducting into the intricacies of realtime systems.
However applying the unix strings command to the burnd binary suggests that the technique shown at It is possible to burn Arduino remotely? is applicable, possibly with the addition of arduino.elf as a “magic” name in /lib/firmware.
xref here to Seeing Arduino loader device on a Linux x86_64 host · Issue #81 · milkv-duo/duo-buildroot-sdk · GitHub which describes my current problem of being unable to see the target serial download device from a Linux host.
Updated: my experience so far is that the name /has/ to be arduino.elf, and I’ve not yet managed to get serial output working.
MarkMLl