Rolando Pelayo / Mbed 2 deprecated sine_wave_generator

A sine wave generator using AD9833 and AD9850 using STM32F103RB

Dependencies:   mbed

This is a sine wave generator using DDS IC' AD9833 and AD9850. The STM32F1 microcontroller produces the SPI commands for the two DDS.

Learn more about STM32F1 in my blog: https://www.teachmemicro.com

main.cpp

Committer:
roland_tmm
Date:
2017-11-21
Revision:
0:6069c0f2a245
Child:
1:9dcccb399f0b

File content as of revision 0:6069c0f2a245:

#include "mbed.h"
#include "AD9833.h"
#include "AD9850.h"

AD9833 gen;       // AD9833 object. Defaults to 25MHz internal reference frequency
AD9850 dds;       // AD9850 object.

double GENfreq = 10000;            //frequency for the AD9833
double DDSfreq = 10000000;         //frequency for the AD9850
double DDStrimFreq = 124999500;    //frequency used by AD9850 to calibrate
int DDSphase = 0;                  //phase for the AD9850

int main() { 
    
    // Sequence to follow to generate waveform using AD9833
    gen.Begin();              // The loaded defaults are 1000 Hz SINE_WAVE using REG0
                             // The output is OFF, Sleep mode is disabled
    gen.EnableOutput(false);  // Turn ON the output
    WaveformType waveType = SINE_WAVE;    //set waveform type. other possible value: TRIANGLE_WAVE, SQUARE_WAVE, HALF_SQUARE WAVE
    gen.SetWaveform(REG0,waveType);       //set wave type to register
    gen.SetGENFrequency(REG0,GENfreq);    //set frequency to register 
    gen.SetOutputSource(REG0);            //output waveform with GENfreq as frequency
    
    // Sequence to follow to generate waveform using AD9850
    dds.Begin();                         //begin generating for the AD9850
    dds.CalibrateDDS(DDStrimFreq);       //calibrate to match crystal oscillator
    dds.SetDDSFrequency(DDSfreq, DDSphase);
}