TM4C123 Gamepad X&Y Axis

That depends on what you mean.

If you mean convert the 8 bit result to 16 that's trivial.

If you mean get 16 bits of accuracy that's probably not possible.

If you mean use the 12 bit converted value that may take a little care but is probably possible (assuming the original is using close to the full scale of the A/D)

Robert

Hello Arian

You will need to left shift the values and then type cast it as a signed variable or better convert unsigned to signed integer.

Taking the 12 bit value, convert to 16 bits using left shift operation is what I mean. The real issue seems to be the GameReportDescriptor. I tried increasing the ReportSize for each axis to 16(from 8) but the board does not seem to send data bigger than 32 bits(Original size of struct)

Thanks for the quick reply,

I have done both of these here is the code showing

#define Convert16Bit(ui12Value) ((int16_t)((ui12Value)<<4))

but, the range that is outputted is still between 0-255.

Hello Arian,

You would need to check with the USB specification.

www.usb.org/.../HID1_11.pdf