DDS Controller

PC controlled AD9850 DDS module using a PSoC 4.
The idea is to have a small kit that can generate create a required frequency at the DDS module. All controls are accessible via the COM interface using a terminal application.

Author: Angad Gill

Hardware

The $4 PSoC 4 Prototyping Kit is used here along with the MiniProg. The MiniProg isn't necessary as the PSoC device can be programmed using the bootloader, but I haven't tried that feature yet.

Software

A serial communication terminal application is needed to interact with the Signal Generator. I prefer to use Python's PySerial package which comes with an excellent miniterm program. It can be installed using pip as follows:
pip install pyserial
And connected to the Signal Generator using the following command:
On Windows: python -m serial.tools.miniterm COM4 115200 -e
On Mac: python -m serial.tools.miniterm /dev/cu.usbmodem14231 115200 -e

• COM4 is the port for the PSoC 4 Prototyping kit on my Windows computer and /dev/cu.usbmodem1431 is the port on my Mac. Use this command to see all available ports: python -m serial.tools.list_ports
• 115200 is the baud rate.
• -e enables the echo mode in minitterm

Commands

The code has the following three commands built into it, type them in the terminal and hit Enter to see usage formats:

• help
• dds