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LTDC worked without FreeRTOS; not with

b1aze
Associate III

‎2025-12-08 8:23 AM - last edited on ‎2025-12-08 8:33 AM by

HI all i have been working with LTDC to drive an external RGB parallel display . i made it working by placing the framebuffer inside internal RAM . i got output with good update speed. but when i try to incoperate  FREERTOS with this project the output is gone . any one encountered such issues like this , any solution for this now? ;)

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Andrew Neil
Super User

‎2025-12-08 8:31 AM - edited ‎2025-12-08 8:31 AM

An RTOS (any RTOS) is not really something that you can just bolt-on to an existing project - it is a fundamental change to the project architecture.

You'll need to do some debugging to find why your code is not working ...

  • Are basic things like UART and LEDs still working ?
  • Is your display driver getting initialised properly ?
  • Is your display driver getting called at all ?
  • Is your display driver getting called sufficiently often ?
A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.
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