DDS-AD9912-Arduino-Shield

DDS (Direct Digital Synthesis) Analog Devices AD9912 Arduino Shield by GRA & AFCH

Web-site: https://gra-afch.com Direct link to category: https://gra-afch.com/product-category/rf-units/

GA_Flasher can be used to upload compiled firmware from "Firmware Compiled (.HEX File)" folder: https://github.com/afch/GA_Flasher

"Firmware Compiled (.HEX File)" - folder contains pre-Compiled firmware (.HEX File), that can be uploaded via "AvrDude", GA_Flasher or any other software for flashing Atmega 2560

"Firmware Source (.INO File)" - folder contains source of firmware that can be compiled (modified if necessary) and uploaded via Arduino IDE: https://www.arduino.cc/en/Main/Software

"Libraries" - contains libraries that are only needed for compilation: place them to "C:\Users[USER]\Documents\Arduino\libraries", where [USER] - your windows username.

This AD9912 Shield can be easily connected to Arduino Mega without additional wires and converters.

The switching of clock sources is performed by the following components:

|-------------------------------------|-----------------------------------|-------------------------------|--------------|
|      Clock source                   |            Capacitors             |    Resistors                  | Ferrite Bead |
|   (only one at a time)              |  C20  | C18,C19 | C14,C17 |  C15  |  XO  | REF | PLL_BP(1k) | R37 |      FB1     |
|------------------------------------------------------------------------------------------------------------------------|
| XO - Crystal Oscillator (Z1)        |   -   |    V    |    X    |   V   |   V  |  X  |      X     |  V  |       X      |
| TCXO - Oscillator 1ppm (Z2)         |   V   |    X    |    V    |   V   |   X  |  V  |      X     |  V  |       V      |
| OCXO - Oscillator 0.1ppm (Z3)       |   X   |    X    |    V    |   V   |   X  |  V  |      X     |  V  |       V      |
| REF CLK IN - External Generator     |   X   |    X    |    V    |   X   |   X  |  V  |      V     |  X  |       X      |
|------------------------------------------------------------------------------------------------------------------------|

Where V means that the component must be installed (soldered), and X - means that the component must be removed

List of Serial Port Commands:

Starting with version 1.02, the ability to control via the serial port has been added.

F - Set Frequency in Hz (100000 - 500000000)
H - Set HSTL Output: 0 - OFF, 1 - ON, 2 - Doubler ON
C - Set CMOS Output: 0 - OFF, 1 - ON
D - Set CMOS Divider (1 - 65353)
P - Set Output Power in dBm (-7 - +4)
M - Get Model
E - Enable Outputs (ALL)
S - Shut down Outputs (ALL)
V - Get Firmware Version
h - Help
; - Commands Separator

Example:
F100000;P-2
Set Frequency to 100 kHz, and Output Power to -2 dBm.
Any number of commands in any order is allowed.

Serial Port Settings:

Speed - 115200 Bouds
Data Bits - 8
Stop Bits - 1
Parity - No
DTR - OFF

Windows:

An example of setting up a serial port in the Windows console:

  mode COM3 baud=115200 DTR=OFF Data=8

Usage example:

  echo F100000000 > COM3

Ubuntu 22.04:

An example of setting up a serial port in the Ubuntu:

  sudo usermod -aG dialout $USER_NAME$
  sudo chmod a+rw /dev/ttyUSB0
  sudo stty -F /dev/ttyUSB0 115200 cs8 ixoff -hupcl -echo