harmony 鸿蒙UsbControlRequestSetup

  • 2023-10-30
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UsbControlRequestSetup

Overview

Defines the setup data for control transfer, which corresponds to Setup Data in the USB protocol.

Since

10

Related Modules

UsbDdk

Summary

Member Variables

Name Description
bmRequestType Request type.
bRequest Specific request.
wValue Value corresponding to wValue in the USB protocol. Its meaning varies according to the request.
wIndex Index corresponding to wIndex in the USB protocol. It is usually used to transfer the index or offset. Its meaning varies according to the request.
wLength Data length corresponding to wLength in the USB protocol. If data is transferred, this field indicates the number of transferred bytes.

Member Variable Description

wIndex

uint16_t UsbControlRequestSetup::wIndex

Description

Index corresponding to wIndex in the USB protocol. It is usually used to transfer the index or offset. Its meaning varies according to the request.

wLength

uint16_t UsbControlRequestSetup::wLength

Description

Data length corresponding to wLength in the USB protocol. If data is transferred, this field indicates the number of transferred bytes.

bRequest

uint8_t UsbControlRequestSetup::bRequest

Description

Specific request.

bmRequestType

uint8_t UsbControlRequestSetup::bmRequestType

Description

Request type.

wValue

uint16_t UsbControlRequestSetup::wValue

Description

Value corresponding to wValue in the USB protocol. Its meaning varies according to the request.

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