brintOS SOM programming station

  som-mfg-f7                            program a whole STM32F7 SOM, unattended
                                        (U-Boot, kernel, boot test, MAC, shipping environment)
  som-mfg-f7 --help                     the MAC list, the network, --dry-run
  som-program-f7                        program the STM32F7 SOM over JTAG
  som-program-f7 --help                 adapters, transport, speed, dry-run
  som-program-f7 --adapter jlink        the same, through a SEGGER J-Link
  som-console                           the SOM's serial console (picocom; --list, --find)
  ip link set eth1 up; ip addr add <address>/24 dev eth1
                                        put a granted USB Ethernet adapter on your network
  /etc/init.d/tftpd-hpa start           serve /var/lib/tftpboot over TFTP
                                        a board's U-Boot fetches stm32f7/rootfs.uImage
  tftp -m binary <server> -c get <file> /tmp/<file>
                                        fetch a file over TFTP into /tmp
  curl --tftp-blksize 8192 -o /tmp/<file> tftp://<server>/<file>
                                        the same, in larger blocks: much faster
  /usr/share/brintos-som-station/usb-ethernet-and-tftp.md
                                        the network: set-up, speed, limits
  brintos-selftest 99-som-station.test  check the station itself, no board needed

  /README.md                            what this machine is, and where things live
  /usr/share/brintos-som-station/       the full procedure, wiring included