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display mipi - sending a dummy black portion

vitom
Associate II

Hi programmers !

I'm trying to work whit AVD-TT78QT-NN-005-S mipi display (1280x400 pixel) and STM32 U5A9J-DK board.

This display needs a black portion of screen to visualize the image correct: (from datasheet)

vitom_0-1690788232628.png

Obviously the screen in Touchgfx designer project must have the dimensions of 1280x400, but I have to throw out a 1280x540 screen, with the 140 empty lines as in the image.

Does anyone have an idea ​​where to intervene to ensure that each line exiting the MIPI lanes always has 140 black pixels inserted in the position?

My idea is to modify the code that builds the lines to be sent via MIPI taking the data from the framebuffer, but I can't figure out how/where to do it.

Can anyone suggest me something?
Thank you very much.

 

 

 

 

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