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Topic: DDS Library for The AD9835 (Read 5044 times) previous topic - next topic


Hello.  Having bought one of the AD9835 breakout boards from Sparkfun (http://www.sparkfun.com/products/9169), the lack of a library to control it was rather noticable.  As a result, I have decided to write one, called Synthesis.

URL: https://github.com/LachlanGunn/Synthesis

The intention is for this library to add support for other devices as I acquire them.  API documentation is included in the library.

Usage Example:
Code: [Select]

* Fixed-frequency sinusoid generator.
* This example produces a 1MHz sinusoidal signal using the AD9835 class
* from the Synthesis library.

#include <SPI.h>
#include "AD9835.h"

// We begin by creating the AD9835 object with the pin assignments
// that are used.  If another pinout is used, this must be
// modified.
AD9835 dds(
        7, // FSYNC
        3, // SCLK
        2, // SDATA
        6, // FSEL
        5, // PSEL1
        4, // PSEL0
        50000000 // hzMasterClockFrequency (50MHz)

void setup()
    // We must first set up all of our output pins.

void loop()

    // We then set the board to produce a 1MHz signal.
    dds.setFrequencyHz(0, 1000000);

    // Without modulation the choice of phase offset does not matter,
    // but we set it to zero for good measure.

    // Finally, we turn on the IC.

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