How do I get better performance from LVGL for a plot app

How-to
7

The chart is really not suitable to display a large amount of data at high speed. Using canvas is much better.

Some thoughts:

  • If possible use the canvas with TRUE_COLOR color format instead of TRUE_COLOR_ALPHA because the former is much faster to draw.
  • Probably it’s much faster to use e.g. 2 pcs of 1/4 screen-sized buffer in internal RAM and copy the buffers into single frame buffers stored in external SRAM. It might have flickerings, neede to be checked.
  • Be sure you have enabled -O3 optimization and all MCU caching.