Hi, I just recently got a Pi and this is my first project. Online I saw a video on how to build your own retro pie joypad. So I made the whole pad and connected the pins to the pie correctly but, it isn’t showing up. I know there is some sort of software I need to use for the pi to read the ports as a usb device, but I haven’t been able to find any that work. Also when I try to run retropie through raspbian, it says it isn’t supported yet. I don’t want to run retropie straight off of the sd card because I’m not sure how I will run the software for the joypad, while retropie is the main os. Please help. I don’t want a bad, first experience.