So I have my pi and official touchscreen in the car, running the awesome Crankshaft NG for Android Auto !!!! Check it out, it's ace !!!! getcrankshaft.com
The only issue I am having is powering it, the connection is awkward connecting into the Raspi micro usb connector, and I would prefer to connect on the gpio to power up the pi, but the tpuchscreen also gets its power from there!!!!
So I am really confusing myself here. i can plug the power into either the screen micro usb connection, or the pi, and they both power up......so how ????
It would be ideal if I could provide power to the pi on the GPIO, just confusing myself about how they are both getting power....is the GPIO connections to the screen providing power to the screen ??????? Is the Pi gpio putting out 5v on pin 2 or receiving ????