I have the exact setup, due 7" tft w/ RA8875, capacitive touch panel. I have set it up for 4wire SPI, powering it at 5v from external power source, connected it as in this example. I use the adafruit RA8875 library and tries the buildtest sketch,but I can't get it to work, I only get a serial print telling RA8875 not found and the screen won't even flicker. I hit a dead end right now, I don't know what to do, do you have any tips or suggestions?
Thanks!