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?

[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]

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

[Cody]

If anyone is still having troubles with the display on the STM32F429 Discovery I have a working CubeIDE project. It is messy because I only intended to use it just for testing and I only configured the hardware that was need to get the display working. Hope this helps.

[HHarj.1]

Nice work, thank you! So did you just copy those settings from somewhere (TouchGFX files) or how did you figure out all those settings? Wonder if that same thing could be done for stm32f469-disco board?

[Cody]

I copied them from the Application Template. The same method should work for it. There's a video of how to get the code you need to copy at https://www.youtube.com/watch?v=o42r4xXOnbo.

[HHarj.1]

I got your project working, can see the "Hello World" screen. However, if I add the FreeRtos and nothing else, I get only colored stripes on the LCD. What should I do to get it working?

EDIT: I got it working. Just added the MX_TouchGFX_Process(); in the defaulTask for loop.

[Franco77]

Hi @HHarj.1​ , then I have to cut off the FreeRtos??? I added the MX_TouchGFX_Process(); in the defaulTask for loop, but no success

[HHarj.1]

Maybe you are not actually running it...when you debug you have to start it by pressing resume icon (or F8). The screen is white before you do. If that's not the case then there's something else wrong if you are not able to run the program.