 
  Quickstart without reading much:
  
  You need: - A STM32F407 Discovery board  
            - A serial 115200 baud terminal connected to USART2 
              (TX on PA2, RX on PA3)
            - A longwave antenna for 100 kHz, bandwidth 90-110 kHz
              with a signal between 0V and about 3V connected to PC1

  Set up your antenna.
  Take care of proper signal level to not fry your analog-digital converters !

  Connect terminal and signal to STM32F407 board and flash the quickstart image
  which comes as binary and in intel hex flavour.

  Flashing for Linux:

  st-flash erase
  st-flash write quickstart.bin 0x08000000

  Get 115200 baud 8N1 terminal running and press Reset.
  It will give you a welcome message and orange LED starts to glow.

  For Sylt chain (default) type:
    measure-convolution

  For Lessay chain type:
    67310 gri!
    4 stations !
    measure-convolution
