SDAA158 December   2025 MSPM33C321A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Overview
    1. 1.1 LVGL Project Setup
    2. 1.2 Configuration
    3. 1.3 Initialization
    4. 1.4 LVGL Output
    5. 1.5 LVGL Input
    6. 1.6 LVGL Update
  5. 2LVGL Example
    1. 2.1 Hardware Connections
    2. 2.2 Software
    3. 2.3 LVGL Example Summary
  6. 3Summary
  7. 4Revision History

1.4 LVGL Output

When LVGL is ready to flush the color buffer, LVGL calls the flush callback method that was registered in the configuration step. The flush callback is where the color buffer is processed and sent to the display specific communication interface. Typical processing methods are:

  • Individual Pixel Flush: Pixel data is writen to communication interface one-by-one and sent to the display. This method is the most simple, but is also the slowest due to the required processing time by the CPU
  • Full Buffer Flush: Pixel data is transfered to the communication interface through DMA and sent to the display. This method is more complex than the previous method due to the DMA, however, the DMA usage allows LVGL to begin writing the next part of the rendered image to a second color buffer, making this method much faster.

After the color buffer has been processed, LVGL must be notified that the color buffer can be flushed by calling lv_disp_flush_ready.