Finally some update on AVR DDS3 signal generator. Circuit is practically done and PCBs are made. I decided to go with two microcontrollers on board to make it more functional. One microcontroller Atmega328P is gonna be dedicated to user interface and signal generator control. Second Atmega88 is gonna be used for signal generator only. This will give un-interruptable signal output while changing parameters or simply doing signal sweeps.
Maybe this isn’t best choice but this is what I had on a desk and wanted to put in to use. If I find it annoying and there will be more bugs or more flaws schematic will be remade.
Decided to add computer interface. So there is an UART connector that suits SparkFuns FTDI Basic Breakout board.
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