White screen on stm32f429i-disc1display

[DLips.1]

Hi all,

I am trying to configure my stm32f429i-disc1 with the lates CubeMX 5.5 and TouchGfx 4.13. I have followed the instructions from here: https://touchgfx.zendesk.com/hc/en-us/articles/360010921760-TouchGFX-HAL-Development, but my display is still all white (there should be red background with simple 'hello world' string on it).

The project compiles and there is also 1s_cnt which increments properly. I've tried to debug the project and noticed that program enters inside functions:

• void StartScreenPresenter::activate()
• void StartScreenView::setupScreen()

on startup but only once.

Both the board and the cable are ok, because I can flash MCU with other project and then screen works fine.

Have you got any ideas what I am doing wrong?

[Martin KJELDSEN]

Haven't done the F429-DISCO board yet for CubeMX 5.5/Generator. I'm not sure if i'm ready to conclude that "most" are using that board =) But it's a priority, still. It's one of the next boards. H750 and F750 currently.

When it's done you can combine your project with any matching UI from the designer to have an example project.

/Martin

[Martin KJELDSEN]

setupScreen() won't be empty in the base class generated by the designer if you have something on canvas. You can just add a box and break on the box init code.

/MArtin

[Myous.1]

i've inserted a break point inside the LTDC IRQ , it seems to be firing and calling this handler "HAL_LTDC_IRQHandler(&hltdc);"

[Cody]

I've made some progress with the "blank screen" today. The problem with mine was the SDRAM was not fully initialized.

In CubeIDE 1.1 when you generated code for a project with TouchGFX it would generate the BoardConfiguration and HW_Init that configured some of your hardware for you. I copied SDRAM_Initialization_Sequence from an old project generated with CubeIDE 1.1 and put it my current project in CubeIDE 1.2.1 after MX_FMC_Init. Now I am getting some of the screen I expect to see before it crashes.

[Martin KJELDSEN]

Is setupScreen() being called?

[Martin KJELDSEN]

What about framebuffer memory? Are you providing an address? If so, is that memory initialized? CubeMX will not do this for you - Someone else fixed his "white screen" issue by fixing his SDRAM configuration .

/Martin

[Martin KJELDSEN]

What exactly are you trying to do? What code would you like to "add" ? The documentation explains where to transfer framebuffer to display over e.g. spi.

[Martin KJELDSEN]

Are your memories set up correctly? CubeMX has no clue which SDRAM chip (even if its on an ST board) is on your board.

[Martin KJELDSEN]

Okay, that's progress - Did you investigate the crash? Something we should talk about? Related to graphics?

[Myous.1]

i have it set to "By Allocation" , which doesn't ask me for a starting address for the buffer.