Skip to content
Snippets Groups Projects
Select Git revision
  • druckluftorgel-v2 default
  • master protected
2 results
Blame Permalink
README.md 1.02 KiB

I2C OLED demonstration

This example code demonstrates use of the CH32V003 I2C peripheral with an SSD1306 OLED (128x32 pixel type). It provides a generic I2C port initialization and transmit (write-only) low level interface and a high-level graphics driver with pixels, lines, circles, rectangles and 8x8 character font rendering. Out of the box this demo cycles through a few different graphic screens to test out the various drawing primitives.

https://user-images.githubusercontent.com/1132011/230734071-dee305de-5aad-4ca0-a422-5fb31d2bb0e0.mp4

Use

Connect an SSD1306-based OLED in I2C interface mode to pins PC1 (SCL) and PC2 (SDA) of the CH32V003 with proper I2C pullup resistors and observe the various graphic images that cycle at approximately 2 second intervals.

Note - I used an Adafruit 0.91" 128x32 OLED breakout (stock #4440) for my testing and found that the built-in 10k pullup resistors were too weak for reliable I2C bus transactions. I had to add 2.2k resistors to the SCL and SDA pads to allow proper operation.