White boxes when using Fonts from External Flash

[JGoew.1]

This is a project that I just updated from TouchGFX 4.5 to 4.19.

I've been working to update a project to use external flash fonts instead of internal which was the reason from upgrading from 4.5 to 4.19.

I'm stuck at a point where the font gets loaded. It appears that the glyphNode buffer is getting filled correctly as the width, height, left, kerning, etc from the datareader->copydata

But it appears that the font itself might not be getting loaded as getBitsPerPixel is returning unexpected values like 0x79, when I know that my font has a BPP of 2. Which makes me think that the actual bitmap of the glyph might not be getting loaded.

All the other image graphics and drawings we use are working fine.

Code from TouchGFX/UnmappedDataFont.cpp
 
const GlyphNode* UnmappedDataFont::getGlyph(Unicode::UnicodeChar unicode, const uint8_t*& pixelData, uint8_t& bitsPerPixel) const
{
 int index = lookupUnicode(unicode);
 
 if (index != -1)
 {
 // Read glyphNode from unmapped flash
 touchgfx::FlashDataReader* const flashReader = ApplicationFontProvider::getFlashReader();
 flashReader->copyData(glyphList + index, &glyphNodeBuffer, sizeof(GlyphNode));
 
 pixelData = getPixelData(const_cast<const GlyphNode*>(&glyphNodeBuffer));
 bitsPerPixel = getBitsPerPixel();
 return &glyphNodeBuffer;
 }
 return 0;
}

Example:

Internal --> External

 

Any ideas

[MM..1]

Why you dont use memory mapped mode ?

[JGoew.1]

The STM32F429I that we use for the display doesn't have QSPI, so I thought that wasn't possible.

Followed this for setting up the normal SPI:

https://support.touchgfx.com/4.20/docs/development/scenarios/fonts-in-unmapped-flash

[MM..1]

Then you need debug or implement custom ApplicationFontProvider::getFlashReader

[JGoew.1]

Thanks. I figured that since I was posting and stated that the data is getting pulled through my datareader that I wrote and that the problem is that it is like TouchGFX just throws away that data when exiting out of GetGlyph, it was understood that I have implemented getFlashReader and have been debugging it.

I wish TouchGFX still provided full source like when we were originally paying for it instead of this precompiled library.