Hello,
I noticed you have some experience with the Teensy an Gameduino 2, I also have a Gameduino 2 and Teensy 3.1, while trying to hook all up I encountered with some problems - I will be grateful if you solve my problem:
I connected all the Gameduino 2's pins as originally described to my Teensy 3.1, I made a few attempts of running a sketch and the Gameduino 2 only showed a white screen.
I tried to supply other power source for the screen from my Arduino UNO by placing a 3.3v pin from Arduino to the screen - in this case the screen worked well.
As it seems, the Teensy literally doesn't send any commands when the 3.3v pin is occupied.
Please, Can you advice me what I should do?
I will appreciate any kind of answering, thank you, Dan.