This library is intended to control Analog Devices AD 9951 DDS chip.
For hardware reference see DL5MGD design:
It's clocked with 80Mhz crystal for 400Mhz clock.
There are two versions - one uses any Arduino pins, and second uses SPI interface.
SPI version is fast enough for direct FM generation.
Copyright (c) 2014, Tomasz Salwach SQ6QV
All rights reserved.
This software is under new BSD license