How to map gamepad axes

[Mitza21]

Hello, i m just a beginer in coding, and i dont understand how i suppose to map the ponentiometer for axes.
Thanks.

[dlbass]

I am new to this myself, so my answer is probably far from ideal, but it works as a starting point. Hope this helps someone else new to making custom controllers.

Since the potentiometer is an analog input that provides a range of values, as opposed to digital values of HIGH or LOW, you must capture the potentiometer's position using analogRead().

Once you have the current value of the potentiometer, it can simply be given to the Gamepad axis you want. Notice that your potentiometer probably gives values between 0 and 1024, and the documentation for the Gamepad X and Y axes range from -32768 to +32767, so you would need to figure out how you want to expand your 0-1024 to get full use of the available resolution. Or you can do what I did and just use Windows to calibrate with the values as they are.

Here's a sample of setting the Y-axis within loop()

  // Y-axis
  const int yRaw = analogRead(A0);     // read potentiometer at pin A0
  Gamepad.zAxis(yRaw);     // set position
  Gamepad.write();     // send value
  delay(100);     // debounce

[MyNameWasUnavailable]

I am trying to do something similar, I have an Arduino Uno flashd with Hoodloader2. When I try and compile for the atmega16u2 on this device, I get the following:

Gamepad:30:31: error: 'A0' was not declared in this scope
const int yRaw = analogRead(A0); // read potentiometer at pin A0
^~
C:\Users\xxxx\AppData\Local\Temp\arduino_modified_sketch_145379\Gamepad.ino:30:31: note: suggested alternative: 'B0'
const int yRaw = analogRead(A0); // read potentiometer at pin A0

If I change it to be something like the atmega32u4 it compiles correctly.

Am I missing something or are the analog pins not available for use when using a uno?

[MyNameWasUnavailable]

Ahh, NM, After reading the pin diagram for the hundreth time, I realised that the Pins I want to use, are in fact not connected. oh well, back to the drawing board