I’m making this display:
48 Mhz, 32-bit ARM Cortex - M0+ processor. Flash 256KB, RAM 32K
7” Capacitive Touch 1024x600
Isolated Input, Output, analog, module.
RA8876 Controller on SPI bus
I would try this library, but I have many doubts.
The RA8876 has an accelerator that makes it very fast, drawing primitives, it has a DMA to draw proportional fonts and images from a Flash chip connected to it.
Set pixel is very slow.
Copy image from SD, require 20 Seconds.
Write text from CPU Flas, require 3 Seconds
It may also be that we can improve, but do not know by how much.