esp-scopelogo
Draw logos on an XY-mode (analog) oscilloscope using an ESP32
Requirements
- Python3 with pipenv installed
- Ardino IDE with ESP32 core
- ESP32 with internal DAC (not all versions have this)
Usage:
- get SVG files you want to draw
- use a tool (like inkscape) to convert every object in it to PATH in every image
- install dependencies with
pipenv install - run the samples generating tool with
pipenv run python3 samples_generator PATH_TO_SVG --pickle <pickle_file_name> - you may pre-view the generated samples using
--export <export_file.png>(requires pillow to be installed!) - run
python3 merger.py <pickle_1.pickle> <pickle_2.pickle> ... - copy the resulting c file to the firmware folder, and remove the original
shape.c - compile and upload the code with Arduino
- connect two channels of your o-scope to the DAC pins of your ESP
- switch the scope to XY mode
- use scope controls to adjust image position and size
- you might need to filp the image using scope controls or rotate it by swapping the channels
- you can switch between images via connecting a button between the pin specified in
firmware.ino(can be changed to any pin featuring pullup, software debouncing is provided)
Used some of the SVG reading code from my fourieranim project
Note: the svg.path library does not handle matrix transforms well, in that case applying the transforms to the coordinates with the apply transform plugin for inkscape does the trick.