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Function Generator/README.md
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# Function Generator on a RP2040. # # Function Generator on a RP2040. #
* Features: * Features:
* Direct Digital Synthesis (DDS) Function Generator * Direct Digital Synthesis (DDS) Function Generator
* Serial over USB interface (Putty) * Independant control of either channel through Putty terminal session over USB port
* Dual 8 bit R-2R Digital to Analog converter * Dual 8 bit R-2R Digital to Analog converter
* 1Hz => 1MHz frequency range. * 1Hz => 1MHz frequency range.
* Variable output level (requires MCP41020 dual digital potentiometer with SPI interface) * X-Y mode for Analog clock
* Analog clock simulator * Variable output level 0=>100%
* Target device = Pico (also works on Pimoroni PGA2040)
* External, 3 digit, SPI display * External, 3 digit, SPI display
* Independant control of either channel through Putty terminal session over USB port * Target device = Pico (also works on Pimoroni PGA2040)
* Limitations: * Limitations:
* USB serial requires Windows (10 or later) * USB serial requires Windows (10 or later)
* Phase sync mechanism not effective at high frequencies * Phase sync mechanism not effective at high frequencies
* Target device must be overclocked for 1MHz operation
**Two independanty controled, phase locked, DMA channels...** **Two independanty controled, phase locked, DMA channels...**
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![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/FunctionGenerator.jpg) ![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/FunctionGenerator.jpg)
**Analog Clock Simulator using X-Y mode on a CRT Oscilloscope...** **X-Y mode for Analog Clock Simulator on a CRT Oscilloscope...**
![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/IMG_E1221.JPG) ![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/IMG_E1221.JPG)