Struggling with TouchGFX on custom board

[AndyFraser]

I am struggling to get TouchGFX running on my custom board. The processor is the STM32H7A3RGT and I am driving a 320 pixel x 960 pixel LCD display. I have allocated a frame buffer in internal RAM and have LTDC producing PCLK, DE, VSYNC and HSYNC. I have configured my firmware using CubeMX to use FreeRTOS. I added a call to MX_TouchGFX_Process in my default task but it gets stuck on an assert. Specifically here:

Call Stack

The reason it gets stuck is because pxQueue->ixItemSize is not zero !

ASSERT in xQueueSemaphoreTake

What am I missing ?

Andy

[MM..1]

Check in MX NVIC interrupt settings for all hw … Next in MX TouchGFX check your setup is LTDC for type and for timing.

[AndyFraser]

Thanks for the reply - what specifically am I looking for in NVIC?

I have configured everything for LTDC and am seeing what looks like good signals on PCLK (10MHz), DE, VSYNC and HSYNC.

This looks more like a firmware issue in that xQueueSemaphoreTake is expecting an item size of 0 and the item size is 320.

Looking at the stack trace, it looks like TouchGFX is trying to ‘blit’ to the frame buffer and I am suspicious about the 320 as that is the width of my display in pixels.

Andy

[MM..1]

Show TouchGFX settings in MX too.

[AndyFraser]

Yes, it is working fine now - can’t exactly remember what the solution was though :-(

 

Andy