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EthanMankins
Senior
October 24, 2024
Question

LTDC Display Type Restriction

  • October 24, 2024
  • 2 replies
  • 703 views

I am using the STM32H743VIT and trying to integrate using LTDC. The Display Type options in CUBEMX only allow 16 or 18 bit RGB. I know there is no LTDC_R0, so I assume that is why there is not option for 24 bit RGB; however, we were just planning on tying the LSB R value low to work around this issue. Is there any information on how to set this MCU up for 24bit RBG even though CUBEMX does not allow it?

 

Thank you

EDIT: I am using the 100 pin LQFP package

2 replies

MOBEJ
MOBEJ
ST Employee
October 25, 2024

Hello @EthanMankins ,

Thank you for reaching out with your issue regarding the STM32H743VIT and LTDC integration in CubeMX.

I have tried a project with the same board and found that the option for 24-bit RGB (RGB888) is indeed available. Please see the screenshot below for reference:

 

MOBEJ_1-1729866104175.png

 

In the LTDC Mode and Configuration section under the "Multimedia" category, you should be able to select "RGB888 (24 bits)" from the Display Type dropdown menu.

If you still do not see the 24-bit option, please ensure that you are using the latest version of CubeMX. Updating CubeMX might resolve any discrepancies.

Br

 

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
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EthanMankinsAuthor
Senior
October 25, 2024

@MOBEJ 
Sorry I didn't clarify I'm using the 100 pin LQFP Version.

I just updated and still do not see the 24 option

M
Maxim357
Associate
April 15, 2025

Hello1.png, can you tell me if you have been able to solve this problem?
I am facing the same problem with STM32h743vit6

CubeMX ver. 6.14.1

 

Did I understand correctly that LQFP-100 does not support RGB888 at all, unlike LQFP-176 ( STM32H743IIT6 )
What is the reason for this? There are enough physical pins for RGB888.

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