/*
Version 1.01 2 March 2016 ND6T
This source file is under General Public License version 3.0
Control of AD9850 DDS board by Arduino Uno R3 using minimal leads single frequency
*/
//Prep for AD9850
#define pulse(pin) {digitalWrite(pin, HIGH); digitalWrite(pin, LOW); }
void setup() {
pinMode(10, OUTPUT);// AD9850 clock pin
pinMode(11, OUTPUT);//freq update pin
pinMode(12, OUTPUT);//DATA pin
pinMode(13, OUTPUT);//Reset
pulse(13);
pulse(10);
pulse(11); // Enables AD9850 serial mode
}
void loop() {
output (7032000); // Put your desired frequency here.
SLEEP_MODE_PWR_DOWN; //Synthesizer programmed, no need for controller
}
void output(float frequency) {
long freq = frequency * pow (2,32) /125000000; // Reference clock
for (int b=0; b<4; b++, freq >>= 8) shiftOut(12,10,LSBFIRST,freq);
shiftOut(12,10,LSBFIRST,0);
pulse(11);
}