RP2040-code/Function Generator/README.md

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# Function Generator on a RP2040. #
* Features:
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* Direct Digital Synthesis (DDS) Function Generator
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* Independant control of either channel through Putty terminal session over USB port
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* Dual 8 bit R-2R Digital to Analog converter
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* 1Hz => 1MHz frequency range.
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* X-Y mode for Analog clock
* Variable output level 0=>100%
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* External, 3 digit, SPI display
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* Target device = Pico (also works on Pimoroni PGA2040)
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* Limitations:
* USB serial requires Windows (10 or later)
* Phase sync mechanism not effective at high frequencies
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* Target device must be overclocked for 1MHz operation
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**Two independanty controled, phase locked, DMA channels...**
![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/Capture.JPG)
**Early version of hardware running single channel 150Hz Sine wave + 3rd harmonic on a vintage oscilloscope...**
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![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/FunctionGenerator.jpg)
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**X-Y mode for Analog Clock Simulator on a CRT Oscilloscope...**
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![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/IMG_E1221.JPG)