getPixelData() Hardfault

[beezybee]

I have a screen with only 1 line of text and I get a Hard Fault when I try to run it. I get the fault here at the glyph->dataOffset:

const uint8_t* GeneratedFont::getPixelData(const GlyphNode* glyph) const
{
const uint8_t* const* table = (const uint8_t* const*)glyphData;
return &(table[glyph->unicode / 2048][glyph->dataOffset]);
}

I have everything stored in internal flash and it is initialized before TouchGFX

[GaetanGodart]

Hello @beezybee and welcome to the community!

Can you share your project?

Can you hare the stack call please?

Also, what hardware and software are you using?

Regards,

[beezybee]

I cannot shar my entire project but if there is something specific I should be able to share that. I am using STM32U5A5 with TouchGFX Designer 4.24.1 and CubeMX 6.12.1. Here is my call stack


HardFault_Handler
<Exception frame>
touchgfx::GeneratedFont::getPixelData(touchgfx::GlyphNode const *) const
[??getGlyph_1 + 0xb]
touchgfx::Font::getGlyph(unsigned short) const
[??getNextLigature_0 + 0x23]
[??getStringWidthLTR_0 + 0xb]
touchgfx::Font::getStringWidth(unsigned char, unsigned short const *...) const
[??getTextWidth_5 + 0x1d]
[_ZN8touchgfx8TextArea19resizeToCurrentTextEv + 0x17]
[_ZN8touchgfx8TextArea12setTypedTextERKNS_9TypedTextE + 0x1d]
GasReadingHeadingBase::GasReadingHeadingBase()
GasReadingHeadingBase::subobject GasReadingHeadingBase()
GasReadingHeading::GasReadingHeading()
GasReading4ScreenViewBase::GasReading4ScreenViewBase()
GasReading4ScreenViewBase::subobject GasReading4ScreenViewBase()
GasReading4ScreenView::GasReading4ScreenView()
GasReading4ScreenPresenter * touchgfx::makeTransition<GasReading4ScreenView, GasReading4ScreenPresenter, touchgfx::NoTransition, Model>(touchgfx::Screen * *, touchgfx::Presenter * *, touchgfx::MVPHeap &, touchgfx::Transition * *, Model *)
FrontendApplicationBase::gotoGasReading4ScreenScreenNoTransitionImpl()
touchgfx::Callback<FrontendApplicationBase>::execute()
touchgfx::MVPApplication::evaluatePendingScreenTransition()
touchgfx::MVPApplication::handlePendingScreenTransition()
[??tick_2 + 0x9]
touchgfx::HAL::backPorchExited()
[??taskEntry_0 + 0xb]
touchgfx_taskEntry()
MX_TouchGFX_Process
HMI_thread_entry
_tx_thread_shell_entry
<Exception frame>
[PC = 0xefef'efef]

[GaetanGodart]

Hello @beezybee ,

Thank you for the stack call.

It seems the issue happens during a transition.
Can you try to remove the transition and still do the screen change and see if the issue still happens?

The stack call show issue at "GeneratedFont::getPixelData(touchgfx::GlyphNode const *) const" but you say the issue happens on line "return &(table[glyph->unicode / 2048][glyph->dataOffset]);" and specifically at "glyph->dataOffset", how do you know that?

If that is indeed accurate, perhaps the glyph do not have a dataOffset, what font are you using?
Can you try to use another font to see if the issue persist?

Regards,

[beezybee]

I have removed the transition and changed the font but no luck. I have done some testing with dataOffset and it doesn't hardfault when I set it to 0 (also doesn't work) but when the value is greater it throws the hard fault. I have attached my TouchGFX project for your reference. 

[GaetanGodart]

I tried to run the simulator but I couldn't because you only shared the TouchGFX folder.

I created a new simulator project and imported your GUI, I ran the simulator successfully.

Does the issue only happens on target?

Regards,

[beezybee]

Yes, I am seeing this while I am running on target.

[beezybee]

Update, I have upgrade to TouchGFX 4.25.0 and CubeMX 6.14.0 and U5 FW package to 1.70 and I am no longer seeing the HardFault. But I am still having an issue with the display not being correct. I am still only seeing blocks of all white and all black. No text is display and framebuffer confirms this. When I print out the size of the rect I get 303 for width and 14 now for height. My display is 303x230.

[GaetanGodart]

Hello @beezybee ,

Can you share your .ioc file (STM32CubeMX)?

It looks like your board bring up is not working,

Regards,

[beezybee]

Please see the attached file.