New hardware working problem.

[Yunus ARI]

Hi everyone,

We working on a project with touchgfx software. We designed a new hardware for this project. Our custom hardware has this components;

• STM32F746BET processor
• IS42S16800F-7TLI SDRAM (128Mb , 143MHz)
• MT25QL128ABA1EW9 QUAD SPI NOR FLASH (128Mb, 133MHz)

We able to access flash and ram. Code able to work in processor.

When I want to draw a box or something that can be drawable with code, screen working fine.

But when I want to draw an image from flash, screen go crazy.

You can see an example this situation;

What can you say about it? Is this can be fixed with software or we need to review our hardware?

Thanks in advance :).

[Martin KJELDSEN]

Have you made sure to program the external flash? Could be reading garbage.

[Yunus ARI]

I have been working on it several days. I tested sram for make sure all bits working. I checked that the flash is programing correctly. I think problem it's coming out when system get data from flash to sram. I focus on DMA2D interface right now.

I add some picture of debug code. You can see memory section of flash that include a test image (Memory 2) and memory section of sram that include frame buffer (Memory 1) . And you can see _test array for this image in "Live Watch" window.

If you look image can see some irrelevant values in ram memory. You consider this is a sram problem but I need to say that, I tried fill sram with direct access and this worked fine. Because of that I thinking it's a DMA2D problem. But I can't prove it 🙂

[Martin KJELDSEN]

Have you compared the data in external flash with what is being generated by TouchGFX based on your image? (generated/images) folder - Just to be sure that the data is written correctly to flash by your flash loader.

/Martin

[Martin KJELDSEN]

Also, can you try storing a small image in internal flash instead and reading from there?

[Yunus ARI]

Yes I did that. It's look correct.

[Martin KJELDSEN]

How did you create the project? Seems like some syncronization may be off. Can you try adding the following line when configuring your TouchGFX HAL?

hal.lockDMAToFrontPorch(true); 

[Yunus ARI]

How can I to do that. As far as I know, TouchGFX is loading image to external flash automatically.

[Yunus ARI]

I working on this project for a long time. I was running this code in STM32F7-Discovery board before this new hardware.

[Yunus ARI]

hal.lockDMAToFrontPorch(true);

This option was selected "false" in my project. I did "true" now as you say but nothing changed.