USB HID Device

Available on macOS

Description

Interface to a USB human interface device (HID) class device.

Appropriate values for the usage_page and usage parameters can be found in the HID Usage Tables. Here are the values for a few common device types:

Device type

Usage page

Usage

Keyboard

1

6

Joystick

1

4

Gamepad

1

5

Signature

iodevice/usbhid_generic

Required Parameters

usage_page

Example

1

HID usage page for the device

usage

Example

6

HID usage for the device

Optional Parameters

preferred_location_id

Default

0

If MWorks finds multiple candidate devices for the given usage_page and usage, it will issue an error message that lists the product name, manufacturer name, and “location ID” for each matching device. To select the desired device, set this parameter to the reported location ID of that device.

log_all_input_values

Default

NO

If YES, MWorks will log (to the event stream and server console) all input values received from the device. Each log message will include an associated element usage page and usage. These usage page and usage values can be used to define a USB HID Input Channel for the input.

autostart

Default

NO

If YES, the device will start I/O automatically (as if by an implicit Start IO Device action) when the experiment starts running.

Note: Device I/O will always stop automatically when the experiment stops running, irrespective of this setting.

alt

Alternative device to use if this one fails to initialize (e.g. because the required hardware is not available). If #allowAltFailover is set to 0 or false, this parameter is ignored.

Placement

Allowed at top level:

Yes

Allowed parent:

Folder

Allowed children:

USB HID Input Channel