AD9833-Pi-Pico-MicroPython

A small class to control the AD9833 DDS chip using the Pi Pico in micropython

Usage

Connection

The Pi Pico connects to the AD9833 over the SPI interface

• VCC -> 3.3V
• DGND -> GND
• SDATA -> GP19 (MOSI)
• SCLK -> GP18 (CLK)
• FSYNC -> GP17 (CS)

Custom pins can be provided in the class initaliser

Waveform Output

To program the AD9833 to give a 10kHz sinusoidal output

from ad9833 import AD9833
ad9833 = AD9833()
ad9833.change_freq(10000)
ad9833.set_sine()

A square wave output can be achieved using

ad9833.set_square()

A triangle wave output can be achieved using

ad9833.set_triangle()

Source

^{This class is based on the comment by 'horuable' in https://forums.raspberrypi.com/viewtopic.php?t=306297}