/*
* USE TWO AD9850
* Modified from http://nr8o.dhlpilotcentral.com/?p=83
*/
// 1st MODULE
#define W_CLK 8 // Pin 8 - connect to AD9850 module word load clock pin (CLK)
#define FQ_UD 9 // Pin 9 - connect to freq update pin (FQ)
#define DATA 10 // Pin 10 - connect to serial data load pin (DATA)
#define RESET 11 // Pin 11 - connect to reset pin (RST).
// 2nd MODULE
#define W_CLK2 4 // Pin 4 - connect to AD9850 module word load clock pin (CLK)
#define FQ_UD2 5 // Pin 5 - connect to freq update pin (FQ)
#define DATA2 6 // Pin 6 - connect to serial data load pin (DATA)
#define RESET2 7 // Pin 7 - connect to reset pin (RST).
#define pulseHigh(pin) {digitalWrite(pin, HIGH); digitalWrite(pin, LOW); }
// transfers a byte, a bit at a time, LSB first to the 9850 via serial DATA line
void tfr_byte(byte data, int pin_clock, int pin_data)
{
for (int i=0; i<8; i++, data>>=1) {
digitalWrite(pin_data, data & 0x01);
pulseHigh(pin_clock); //after each bit sent, CLK is pulsed high
}
}
// frequency calc from datasheet page 8 = <sys clock> * <frequency tuning word>/2^32
void sendFrequency(double frequency, int pin_clock, int pin_fq, int pin_data) {
int32_t freq = frequency * 4294967295/125000000; // note 125 MHz clock on 9850
for (int b=0; b<4; b++, freq>>=8) {
tfr_byte(freq & 0xFF, pin_clock, pin_data);
}
tfr_byte(0x000, pin_clock, pin_data); // Final control byte, all 0 for 9850 chip
pulseHigh(pin_fq); // Done! Should see output
}
void setup() {
// configure arduino data pins for output
pinMode(FQ_UD, OUTPUT);
pinMode(W_CLK, OUTPUT);
pinMode(DATA, OUTPUT);
pinMode(RESET, OUTPUT);
pinMode(FQ_UD2, OUTPUT);
pinMode(W_CLK2, OUTPUT);
pinMode(DATA2, OUTPUT);
pinMode(RESET2, OUTPUT);
pulseHigh(RESET);
pulseHigh(W_CLK);
pulseHigh(FQ_UD); // this pulse enables serial mode - Datasheet page 12 figure 10
pulseHigh(RESET2);
pulseHigh(W_CLK2);
pulseHigh(FQ_UD2); // this pulse enables serial mode - Datasheet page 12 figure 10
}
void loop() {
sendFrequency(1320, W_CLK, FQ_UD, DATA); // freq
sendFrequency(440, W_CLK2, FQ_UD2, DATA2); // freq
while(1);
}
// from http://www.arduino-projekte.de
#include <AH_AD9850.h>
#define CLK 6
#define FQUP 7
#define BitData 8
#define RESET 9
AH_AD9850 AD9850(CLK, FQUP, BitData, RESET);
void setup()
{
AD9850.reset(); //reset module
delay(1000);
AD9850.powerDown(); //set signal output to LOW
// initialize serial communication
Serial.begin(9600);
}
void loop(){
//set_frequency(boolean PowerDown, byte Phase, double Freq);
AD9850.set_frequency(0,0,1000); //set power=UP, phase=0, 1kHz frequency
delay(1000);
AD9850.set_frequency(2500); //set 2.5kHz frequency
delay(1000);
AD9850 << 5000; //set 5kHz frequency in C++ style
delay(1000);
//phase test
for (int phase=0;phase<32;phase++)
{
AD9850.set_frequency(0, phase, 1000); //change phase delay in 11.25°(2PI/32) steps
delay(1000);
}
}
