USBDevice: controlTransferOut() method

Limited availabilitySecure contextAvailable in workers

The controlTransferOut() method of the USBDevice interface returns a Promise that resolves with a USBOutTransferResult when a command or status operation has been transmitted from the USB device.

Syntax

controlTransferOut(setup, data)

Parameters

• setup

  • : An object that sets options for. The available options are:
    • requestType
      • : Must be one of three values specifying whether the transfer is "standard" (common to all USB devices) "class" (common to an industry-standard class of devices) or "vendor".
    • recipient
      • : Specifies the target of the transfer on the device, one of "device", "interface", "endpoint", or "other".
    • request
      • : A vendor-specific command.
    • value
      • : Vendor-specific request parameters.
    • index
      • : The interface number of the recipient.

• data

  • : A TypedArray containing the data that will be transferred to the device. Not all commands require data; some commands can send data just through the value parameter. Check with your device to see what the specific request requires.

Return value

A Promise that resolves with a USBOutTransferResult.

Specifications

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