SPI transactions became officially part of Arduino SPI library some time ago. This happened after many months (most of 2014) of lengthy discussion and testing for these and MANY other details.

Run in the Arduino IDE the HelloWorld example with an ili9488 in SPI. In fact, you don't need an ili display to try this, because it fails at compile time. The possible wiring errors, are irrelevant ...

Good points guys…. a few thoughts: 1. One reason for using the Arduino and Amani64, besides instruction, is for rapid-prototyping purposes, to quickly experiment before implementing a final design.