SPI display vs. Native

SITCore SBC
1

I am thinking of doing a “VNC client” display module with a 7" screen and would like to use the SCM20100E module. This hardware does graphics via SPI. I only have experience in doing parallel / Native displays.

  • What are some of the limitations of SPI based in comparison with Native (speed, screen size, etc)?
  • Is a 7" touch screen feasible for SPI based?
  • What are some recommend screen suppliers for SPI screens?

Thanks in advance for any recommendations / guidance.

2

I am not sure you will find a 7" screen that works with SPI. Usually, they top out at about 3.5" I think.

I use Newhaven (https://www.newhavendisplay.com) and CrystalFontz (https://www.crystalfontz.com/)

3

7in SPI using RA8875

RA8875 NETMF driver by @munderhill

4

You need a lot of ram. You need 260 based modules with megabytes of RAM to make this work properly

800x600x2 is what you need just to make a bitmap, let alone VNC