AD9850 serial library for arduino
C++ Arduino
Latest commit 183db5f Mar 4, 2015 @F4GOJ Update LISEZMOI.md
Permalink
Failed to load latest commit information.
examples Update AD9850.ino Mar 4, 2015
images img Sep 16, 2014
AD9850.cpp Update AD9850.cpp Mar 4, 2015
AD9850.h Create AD9850.h Sep 14, 2014
LICENSE Initial commit Sep 14, 2014
LISEZMOI.md Update LISEZMOI.md Mar 4, 2015
README.md Update README.md Sep 16, 2014
keywords.txt Create keywords.txt Sep 14, 2014

README.md

Arduino serial library for AD9850

F4GOJ Christophe f4goj@free.fr

August 2014

AD9850 datasheet at http://www.analog.com/static/imported-files/data_sheets/AD9850.pdf

Use this library freely.

Installation

To use the AD9850 library:

  • Go to https://github.com/F4GOJ/AD9850, click the Download ZIP button and save the ZIP file to a convenient location on your PC.
  • Uncompress the downloaded file. This will result in a folder containing all the files for the library, that has a name that includes the branch name, usually AD9850-master.
  • Rename the folder to AD9850.
  • Copy the renamed folder to the Arduino sketchbook\libraries folder.

Usage notes

The AD9850 library instantiates a DDS object, the user does not need to do this.

#include <AD9850.h>    //http://github.com/F4GOJ/AD9850

Hardware connections :

ad9850

  • W_CLK -> any pin
  • FQ_UD -> any pin
  • DATA/D7 -> any pin
  • RESET -> any pin

Functions :

begin(int w_clk_pin, int fq_ud_pin, int data_pin, int reset_pin)

Description

Initialize the output pins and master reset the AD9850

Syntax

DDS.begin(w_clk, fq_ud, data, reset);

Parameters

w_clk : Working clock output pin, any pin (int)
fq_ud : Frequency update pin, any pin. (int)
data : Serial data output pin, any pin (int)
reset : Reset output pin, any pin. (int)

Returns

None.

Example
void setup(){
 DDS.begin(6, 7, 8, 9);
}

calibrate(double trim_frequency)

Description

Compensation of crystal oscillator frequency.
Can be used at any time after initialization.

Syntax

DDS.calibrate(trim_freq);

Parameters

trim_freq : Adjust around 125000000 to match the real crystal oscillator frequency. (double)

Returns

None.

Example
void setup(){
 DDS.begin(6, 7, 8, 9);
}

void loop(){
 DDS.calibrate(124999000);
}

setfreq(double frequency, int phase)

Description

Sets the output frequency of the AD9850 and the phase of the signal.

Syntax

DDS.setfreq(frequency, phase);

Parameters

frequency : Output frequency in Hz. (double)
phase : Sets the phase of the output signal, coded on 5 bits allows 32 phase steps of 11,25° each. (int)

Returns

None.

Example
double frequency = 10000000;
int phase = 0;
DDS.setfreq(frequency, phase);

down()

Description

Power down mode reducing the dissipated power from 380mW to 30mW at 5V

Syntax

DDS.down();

Parameters

None.

Returns

None.

Example
DDS.down();

up()

Description

Wakes-up the AD9850 from power down mode.

Syntax

DDS.up();

Parameters

None.

Returns

None.

Example
DDS.down(); // Entering power down mode

// some code doing something

...

DDS.up(); // WAKE-UP !!! :)