Merge pull request #8 from dmadison/documentation

Documentation

Author: dmadison

README.md

@@ -1,10 +1,12 @@
 # Teensy XInput USB Mode
 
 The files in this repository will add an additional USB mode ("XInput") to your Teensy 3 board, allowing it to emulate an Xbox gamepad.
+
+This is meant to be used in conjunction with the [ArduinoXInput library](https://github.com/dmadison/ArduinoXInput).
 
 ## Installation
 
-You must have both [Arduino](https://www.arduino.cc/en/main/software) and [Teensyduino](https://www.pjrc.com/teensy/td_download.html) installed before proceeding. Double-check that your installed Teensyduino version matches the files provided in this repository. This repository is currently using version [**1.44**](https://www.pjrc.com/teensy/td_144). If you don't know your Teensyduino version, compile a blank sketch with a Teensy board selected and the Teensy Loader will open. In the Teensy Loader window select "Help->About" and it will tell you the version number. If your version does not match you will have to reinstall the Teensyduino software.
+You must have both [Arduino](https://www.arduino.cc/en/main/software) and [Teensyduino](https://www.pjrc.com/teensy/td_download.html) installed before proceeding. Double-check that your installed Teensyduino version matches the files provided in this repository. This repository is currently using version [**1.44**](https://www.pjrc.com/teensy/td_144). If you don't know your Teensyduino version, compile a blank sketch with a Teensy board selected and the Teensy Loader will open. In the Teensy Loader window select `Help -> About` and it will tell you the version number. If your version does not match you will have to reinstall or update the Teensyduino software.
 
 Navigate to your Arduino installation directory and open up the 'hardware' folder. It is recommended that you make a backup of this folder before proceeding in case something goes wrong or if you want to revert the installation.
 
@@ -19,6 +21,16 @@ To uninstall, restore your 'teensy' folder from a backup or reinstall Teensyduin
 * [Teensy 3.1](https://www.pjrc.com/store/teensy31.html) / [3.2](https://www.pjrc.com/store/teensy32.html)
 * [Teensy LC](https://www.pjrc.com/teensy/teensyLC.html)
 
+## Limitations
+
+### No Console Support
+
+This will *not* enable you to use your Teensy with an Xbox console! Genuine controllers use a dedicated hardware security chip that handshakes with the console. The Teensy boards do not have this chip, and its security method has not been (openly) broken.
+
+### No Commercial Use
+
+These board definitions make use of Microsoft's VID and PID in order to latch on to the PC driver. As such this is strictly for educational or development use by non-commercial entities.
+
 ## Credits and Contributions
 
 A massive thank you to Zach Littell, whose did all of the original legwork in putting this together. Check out some of his stuff at [zlittell.com](http://www.zlittell.com).