8 years, 8 months ago.

Hi Marvin, That's the display I've used, and here are some of the options I selected:

• Interface: Pin Header Connection-4-Wire SPI
  • As you see there are several choices, this is the one I wrote the driver for. It seemed to be the best trade-off between pin-count and features.
• Power Supply: 5v
  • I chose 5v, because I have an external regulator that supports 5v easily. This is I think also a good choice if you are driving it from your PC, which provides 5v on the USB port.
  • If you have an external 3.3v supply, you could choose that option, but the mbed on-board 3.3v regulator will not have enough power to drive the mbed and the display.
• Touch Panel: 4.3" Resistive touch panel
  • When I bought the 4.3" display, for some reason I was a cheap-skate and didn't actually buy the resistive touch screen. I later bought the 5" display and did get the resistive touch screen.
  • I have not worked with the capacitive touch sensing, because it requires an additional set of pins on the mbed (it is not shared on the same 4-wire SPI), and on my designs of interest, I didn't have the needed spare pins.
• MicroSD Card Interface: none
  • There was another person who purchased this. I have not, so have no experience with it. I think it is simply a "convenience" in that it is carried on the display board, so you would not have to wire in your own - if you wanted an SD slot.
• Font Chip: none
  • This too, I had no need for the additional fonts, so have no experience with it.

The 5 inch panel I also am using. Essentially identical to the 4.3 in (other than the size).

The RA8875 driver should also work with the higher resolution panels using the RA8875 controller.