I screwed up and overwrote the bbl+linux that comes with the U540 while trying to make my own. Is there a binary available to download? freedom-u-sdk doesn’t build with the latest glibc so rebuilding it from source is a bit tricky.
We will be posting firmware updates, manuals, etc on our webpage shortly before the boards land in the hands of the crowd supply pre-orderers. In the meantime, I’ll send you the images by email.