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The use of the pair of 74HC4094 shift registers to emulate a SPI interface on the 8080-16 wired ILI9486 makes things interesting. Without access to the full schematic (in particular the wiring involving WRX & SCLK at the ILI9486 interface) it’s hard to confirm, but my thought was that your...

KurtE -- while their driver leaves a lot to be desired, in this particular case I don't think LCD_WriteData() is actually wrong. Inefficient and inconsistent, perhaps! :) LCD_WriteData() is generally used for 8bit ILI9486 register accesses via a 16-bit 8080 (parallel) interface, so that function...

Great to hear it is working! As KurtE suggests, it would be best to post your GUI-related questions in the GUIslice repo and I would be happy to answer them there. I will likely followup in this thread to post any updates regarding the progress integrating the latest T4 lib changes for the...

I believe there are two steps that may have been overlooked in your setup: 1) From your screenshot, Mike’s mjs513/RA8875 (RA8875_t4 branch) doesnt appears to be in your Arduino/libraries folder. Please download the zip from his repository, and unzip it into your Arduino libraries folder...

The GUIslice master has now been updated (this was minutes before mjs513's charBounds WIP post, so I'll get to that afterwards :) ) This version should provide basic font rendering support (defaults to a GFX font). Please try the latest from the repository. Updating GUIslice from GitHub...

@mjs513 -- Thanks for the heads-up on ILI9341_fonts, that was the missing key for me! I now have GUIslice working with RA8875_t4 using the GFX fonts. For the moment, I am going to make the GUI default to LiberationSans_9 instead of the built-in hardware RA8875 internal font. @KurtE -- yes, it...

Thanks @mjs513 & @KurtE! I was in the process of completing the font rendering updates in GUIslice to support your RA8875_t4 branch but I have encountered a couple issues with RA8875 that I'm hoping you may be able to assist me with. I apologize in advance if I have overlooked certain details...

I would recommend waiting a bit so that I can give you a complete version that has added full compatibility with the library. The above fork does not support font access as you have noted. My development version already supports fonts but I still need some additional work to support the RA8875...

Hi ThijmenL -- It wasn't clear to me from your posts whether you had already downloaded & installed the mjs513/RA8875 fork. If not, then please delete the existing folder (C:\Program Files (x86)\Arduino\libraries\RA8875) and install the new version there. From your pastebin error log, I believe...

Just a quick update... I now have the 5" running on my Teensy 4 with mjs513/RA8875. As you are probably aware, the RA8875 library offers a nice selection of font modes (RA8875 internal/external, GFX, ILI9341_t3, etc.). After some debug I determined that the text output wasn’t visible because...

Great... thank you for the summary of the other T3/T4 library variants! Most of my testing has been with ILI9341_t3 so far, though I haven't experimented with the framebuffer mods yet. It looks like you are seeing a conflict between the teensy built-in RA8875 library and mjs513's branch. Try...

Thanks guys! Hi there -- you guys sure are proactive, it's fantastic! Aside: I've enjoyed the forum over the past year as it has been particularly helpful in getting the most out of my Teensy devices; though looks like I'm overdue in making a post :) Thank you so much KurtE for taking a stab...