USB HID Input Channel

Available on macOS

Description

Input channel on a USB HID Device. Typically, a channel corresponds to a specific input (e.g. key, button, joystick axis) on the device.

Appropriate values for the usage_page and usage parameters can be found in the HID Usage Tables. However, in many cases, an easier method for determining the correct values is to set the device’s log_all_input_values parameter to YES, exercise the input(s) of interest, and record the usage page and usage values reported in the corresponding log messages.

Signature

iochannel/usbhid_generic_input_channel

Required Parameters

usage_page

Example

7

HID usage page for the input

usage

Example

44

HID usage for the input

value

Variable in which to store values received from the input. Input values are always converted to an integer representation before being stored.

Placement

Allowed at top level:

No

Allowed parent:

USB HID Device