Problems with SPI and Multiple Shields (Pins are not colliding)

Projects Networking, Protocols, and Devices
8

If you have any doubt, disable all SPI devices before starting any of them. After that, you should be able to start them in any order you want.

void setup() {
 // disable wifi SPI
 pinMode(SSWiFi, OUTPUT);
 digitalWrite(SSWiFi, HIGH);

 // disable wifi shield SD SPI
 pinMode(4, OUTPUT);
 digitalWrite(4, HIGH);

 // disable GD GPU SPI
 pinMode(8, OUTPUT);
 digitalWrite(8, HIGH);

 // disable GD SD SPI
 pinMode(9, OUTPUT);
 digitalWrite(9, HIGH);
  
 // now start the SPI devices
 GD.begin();
 :
 : <so on>
}