STM32U5G9J-DK1 - details on round LCD and using other MIPI DSI LCDs

[austinproto]

I am using a STM32U5G9J-DK1 kit that comes with a round 2.47" LCD DSI MIPI and looking for other sources that will work with this board. 

I can't find any technical details on the LCD - anyone have a link?  I'm looking for the controller part# mainly.

Tried a Kingtech LCD with a the same 35 pin FFC and it works great (uses HX8379-C controller), however they are in short supply.

Ordered this LCD, 2.1" display  has different number of pins so I made an adapter.  It uses a ST7701S but no graphics at all (backlight works). 

Anyone know if this is a controller/compatibilty issue?  

I'd like to just use TouchGFX however I don't see where I can switch controllers.

Thanks

[mathiasmarkussen]

Hello,

I can not identify which controller the LCD uses. From the BOM available on the product page for the discovery kit, I can find the product number of the display module, which is J025F1CN0201W, but I have not been able to identify the controller.

I would guess, though, since you have had a display based on HX8379-C working, that it uses either that exact controller, or a very similar one.

You should not expect to be able to just replace the display with one using a different controller without changing the code.

In the TouchGFX board setup that is available for the U5G9J-DK1 in the touchGFX designer, the initialization sequence for the board is in the /* USER CODE BEGIN LTDC_Init 2 */ section, and the hardware parameters are set up in CubeMX.

Your display vendor or manufacturer might be able to supply you with an initialization sequence and hardware setup for your particular controller/LCD combination that you can replace it with, or you may be able to find some sample code that works somewhere.