Basic Signal Generator

/*
 * ApplySignal.ino
 * 2018 WLWilliams
 *
 * Basic Signal Generator
 * Learnelectronics
 * Aug 15 2020
 * www.youtube.com/learnelectronics
 * arduino0169@gmail.com
 *
 * Library code found at: https://github.com/Billwilliams1952/AD9833-Library-Arduino
 *
 */

#include <AD9833.h>     // Include the library

#define FNC_PIN 4       // Can be any digital IO pin

//--------------- Create an AD9833 object ----------------
// Note, SCK and MOSI must be connected to CLK and DAT pins on the AD9833 for SPI
AD9833 gen(FNC_PIN);       // Defaults to 25MHz internal reference frequency


int rate = 100;
int pot = 0;



void setup() {
    // This MUST be the first command after declaring the AD9833 object
    gen.Begin();

    // Apply a 1000 Hz sine wave using REG0 (register set 0). There are two register sets,
    // REG0 and REG1.
    // Each one can be programmed for:
    //   Signal type - SINE_WAVE, TRIANGLE_WAVE, SQUARE_WAVE, and HALF_SQUARE_WAVE
    //   Frequency - 0 to 12.5 MHz
    //   Phase - 0 to 360 degress (this is only useful if it is 'relative' to some other signal
    //           such as the phase difference between REG0 and REG1).
    // In ApplySignal, if Phase is not given, it defaults to 0.
    gen.ApplySignal(SINE_WAVE,REG0,rate);

    gen.EnableOutput(true);   // Turn ON the output - it defaults to OFF
    // There should be a 1000 Hz sine wave on the output of the AD9833

    pinMode(A0,INPUT);

    Serial.begin(9600);
}

void loop() {

pot = analogRead(A0);
rate = map(pot, 0, 1023, 1000, 10000);

  gen.ApplySignal(SINE_WAVE,REG0,rate);

Serial.println(rate);


}