About

Python (3.8) code that runs on your PC or RPi, interacts with OpenScope MZ (by digilent) over WiFi to automate the process of collecting data from openscope

This code could run in RPi and the combo RPi+OpenScope becomes your own smart / automated oscilloscope / Data Acquisition System.

You might want to read this before coding on top this repo : Digilent Instrumentation Protocol

Files

OpenScope115200.hex

• The standard baudrate this device uses is 1250000 but usually devices have max baudrate of 115200
• For OpenScope to communicate with such devices, install this firmware
• PROCEED WITH CAUTION
  • This is process is not reversible (same way as uploading firmware)
  • digilent-agent and wavesform live won't work as baud rate will be changed
  • To reverse the process, see "Reverting to original firmware" below

Install my firmware

1. Hold BTNP and press BTNR on device to go into bootloader mode
2. Download OpenScope115200.hex 
3. Follow Update OpenScopeMZ firmware (link below)
4. While step#2 In "Available Firmware Versions" Select option "Others" to browse and pick downloaded file.

Update OpenScopeMZ firmware

Revert to Original Firmware

0. Install Arduino 1.6.9
1. Follow instrunctions at OpenScopeMZ source code github repository markdown 
(link to repo given below)
2. Don't forget to put device in bootloader mode before arduino upload !

Digilent/openscope-mz

usb_omz.py

• Sets up parameters like sampling rate, sample size and number of acquisitions to be done and wait interval between the acquisitions
• Script takes maxacqCount number of acuisition in different files and saves it as .bin files which can be decoded to CSV later.

decode.py

• Finds all data container files in current diectory generated by usb_omz.py
• Decodes bin files to csv format

Problems

• Sadly Digilent Openscope has been discontinued.
• At high sample size, I observed that only 90% is data collected and there is a data loss while reading data from serial input. This problem might be solved by placing right serial object parameters. Forum Question
• For RaspberryPi 4B, When openscope is connected to USB of Pi, At 115200 baudrate, 4096 buffer size, 2 seconds timeout and 1 sec wait time between serial write and serial read, you would get 89% to 90% data for total sampling size of 30,000 points.