em100: EM100pro command line utility

Example:
  ./em100 --stop --set M25P80 -d file.bin -v --start -t -O 0xfff00000

Usage:
  -c|--set CHIP:                  select chip emulation
  -d|--download FILE:             upload FILE into EM100pro
  -r|--start:                     em100 shall run
  -s|--stop:                      em100 shall stop
  -v|--verify:                    verify EM100 content matches the file
  -t|--trace:                     trace mode
  -O|--offset HEX_VAL:            address offset for trace mode
  -T|--terminal:                  terminal mode
  -F|--firmware-update FILE:      update EM100pro firmware (dangerous)
  -f|--firmware-dump FILE:        export raw EM100pro firmware to file
  -g|--firmware-write FILE:       export EM100pro firmware to DPFW file
  -S|--set-serialno NUM:          set serial number to NUM
  -p|--holdpin [LOW|FLOAT|INPUT]: set the hold pin state
  -x|--device BUS:DEV             use EM100pro on USB bus/device
  -x|--device DPxxxxxx            use EM100pro with serial no DPxxxxxx
  -l|--list-devices               list all connected EM100pro devices
  -D|--debug:                     print debug information.
  -h|--help:                      this help text