This Project began to explore the use of the DVSI AMBE 2020 voice compression chip and also the ADF7021 single chip VHF RF Transceiver from Analog Devices.
Future Directions:The most likely direction is a re-spin of the board to add more user inputs like a key pad as well as split the RF section onto another board. This would be a more modular approach and allow a simple CMX589A modem chip to be used to interface to non-Icom FM radios.
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Another output from this project will be a more detailed low level D-Star format description and open source code that others can use or build upon for their own projects.
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