Crash after placing TouchGFX fonts in memory mapped QSPI flash.

[Guit32010]

I have a project where I want to place the TGFX resources (images, translations, fonts) in a memory mapped QSPI flash. In this instance I have placed them in this flash via the linker (.o files) rather than using binary fonts etc.

The crash occurs generally when switching screens. I can usually switch screens successfully a number of times. Sometimes it fails after 30 screen switches, sometimes 5. I've also seen it fail when updating smaller elements. The crash also prevents the debugger (IAR / I-Jet) from stopping, so I've had no luck there. Debug log: "CPU did not stop"

I find the problem goes away if I put the TGFX fonts back in internal flash. It also goes away if I switch back to full frame buffers rather than using partial frame buffers. ( I have restrictions on ram usage, so partial frame buffers are needed)

I've given the TGFX FreeRTOS task lots of stack but that doesn't fix the problem.

I put a scope trace around the TouchGFXHAL::flushFrameBuffer(const Rect& rect) routine. It enters and exits correctly according to the trace. So it appears it's dying inside the TGFX library somewhere.

Any other ideas?

[Osman SOYKURT]

Hello Guit32010,

Can you give more information about your configuration please ?

• Which TouchGFX board setup are you using ?
• Which storage format do you have checked on "Text Configuration" inside TouchGFX Designer ?
• Can you share with us your TouchGFXConfiguration.cpp file ?

/Osman

[Guit32010]

TouchGFX 4.18.1

LCD16bpp

STM32DMA

NoTouchController

[Guit32010]

Mapped storage format

posted a file.

[Guit32010 · Accepted solution]

Update: I disabled the QSPI timeout counter as mentioned in the device errata and the problem appears to have gone away.

[Osman SOYKURT]

Hello Guit32010,

Good to hear that you resolved your problem 🙂

I invite you to select your answer as best answer and close the post so it would help people with the same issue to find the resolution.

/Osman