harmony 鸿蒙usb_ddk_types.h
usb_ddk_types.h
Overview
Provides the enumerated variables, structures, and macros used in USB DDK APIs.
Since
10
Related Modules
Summary
Structs
| Name | Description |
|---|---|
| UsbControlRequestSetup | Setup data for control transfer, corresponding to Setup Data in the USB protocol. |
| UsbDeviceDescriptor | Standard device descriptor, corresponding to Standard Device Descriptor in the USB protocol. |
| UsbConfigDescriptor | Standard configuration descriptor, corresponding to Standard Configuration Descriptor in the USB protocol. |
| UsbInterfaceDescriptor | Standard interface descriptor, corresponding to Standard Interface Descriptor in the USB protocol. |
| UsbEndpointDescriptor | Standard endpoint descriptor, corresponding to Standard Endpoint Descriptor in the USB protocol. |
| UsbDdkEndpointDescriptor | Endpoint descriptor. |
| UsbDdkInterfaceDescriptor | Interface descriptor. |
| UsbDdkInterface | USB DDK interface, which is a collection of alternate settings for a particular USB interface. |
| UsbDdkConfigDescriptor | Configuration descriptor. |
| UsbRequestPipe | Request pipe. |
| UsbDeviceMemMap | Device memory map created by calling OH_Usb_CreateDeviceMemMap(). A buffer using the device memory map can provide better performance. |
Types
| Name | Description |
|---|---|
| UsbDdkEndpointDescriptor | Endpoint descriptor. |
| UsbDdkInterfaceDescriptor | Interface descriptor. |
| UsbDdkInterface | USB interface. |
| UsbDdkConfigDescriptor | Configuration descriptor. |
| UsbDeviceMemMap | Device memory map created by calling OH_Usb_CreateDeviceMemMap(). A buffer using the device memory map can provide better performance. |
Enums
| Name | Description |
|---|---|
| UsbDdkErrCode { USB_DDK_SUCCESS = 0, USB_DDK_FAILED = -1, USB_DDK_INVALID_PARAMETER = -2, USB_DDK_MEMORY_ERROR = -3, USB_DDK_INVALID_OPERATION = -4, USB_DDK_NULL_PTR = -5, USB_DDK_DEVICE_BUSY = -6, USB_DDK_TIMEOUT = -7 } |
USB DDK error code definition. |
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. |
| bLength | Size of the descriptor, in bytes. |
| bDescriptorType | Descriptor type. |
| bcdUSB | USB protocol release number. |
| bDeviceClass | Interface class code allocated by the USB-IF. |
| bDeviceSubClass | Device subclass code allocated by USB-IF. The value is limited by that of bDeviceClass. |
| bDeviceProtocol | Protocol code allocated by USB-IF. The value is limited by that of bDeviceClass and bDeviceSubClass. |
| bMaxPacketSize0 | Maximum packet size of endpoint 0. Only values 8, 16, 32, and 64 are valid. |
| idVendor | Vendor ID allocated by USB-IF. |
| idProduct | Product ID allocated by the vendor. |
| bcdDevice | Device release number. |
| iManufacturer | Index of the string descriptor that describes the vendor. |
| iProduct | Index of the string descriptor that describes the product. |
| iSerialNumber | Index of the string descriptor that describes the device SN. |
| bNumConfigurations | Configuration quantity. |
| wTotalLength | Total length of the configuration descriptor, including the configuration, interface, endpoint, and class- or vendor-specific descriptors. |
| bNumInterfaces | Number of interfaces supported by the configuration. |
| bConfigurationValue | Configuration index, which is used to select the configuration. |
| iConfiguration | Index of the string descriptor that describes the configuration. |
| bmAttributes | Configuration attributes, including the power mode and remote wakeup. |
| bMaxPower | Maximum power consumption of the bus-powered USB device, in 2 mA. |
| bInterfaceNumber | Interface ID. |
| bAlternateSetting | Value used to select the alternate setting of the interface. |
| bNumEndpoints | Number of endpoints (excluding endpoint 0) used by the interface. |
| bInterfaceClass | Interface class code allocated by the USB-IF. |
| bInterfaceSubClass | Device subclass code allocated by USB-IF. The value is limited by that of bInterfaceClass. |
| bInterfaceProtocol | Protocol code allocated by USB-IF. The value is limited by that of bInterfaceClass and bInterfaceSubClass. |
| iInterface | Index of the string descriptor that describes the interface. |
| bEndpointAddress | Endpoint address, including the endpoint number and endpoint direction. |
| bmAttributes | Endpoint attributes, including the transfer type, synchronization type, and usage type. |
| wMaxPacketSize | Maximum packet size supported by an endpoint. |
| bInterval | Interval for polling endpoints for data transfer. |
| bRefresh | Refresh rate for audio devices. |
| bSynchAddress | Endpoint synchronization address for audio devices. |
| interfaceHandle | Interface operation handle. |
| endpoint | Endpoint address. |
| timeout | Timeout duration, in milliseconds. |
Variable Description
bAlternateSetting
uint8_t bAlternateSetting
Description
Value used to select the alternate setting of the interface.
bcdDevice
uint16_t bcdDevice
Description
Device release number.
bcdUSB
uint16_t bcdUSB
Description
USB protocol release number.
bConfigurationValue
uint8_t bConfigurationValue
Description
Configuration index, which is used to select the configuration.
bDescriptorType
uint8_t bDescriptorType
Description
Descriptor type.
bDeviceClass
uint8_t bDeviceClass
Description
Interface class code allocated by the USB-IF.
bDeviceProtocol
uint8_t bDeviceProtocol
Description
Protocol code allocated by USB-IF. The value is limited by that of bDeviceClass and bDeviceSubClass.
bDeviceSubClass
uint8_t bDeviceSubClass
Description
Device subclass code allocated by USB-IF. The value is limited by that of bDeviceClass.
bEndpointAddress
uint8_t bEndpointAddress
Description
Endpoint address, including the endpoint number and endpoint direction.
bmAttributes
uint8_t bmAttributes
Description
Endpoint attributes, including the transfer type, synchronization type, and usage type.
bInterfaceClass
uint8_t bInterfaceClass
Description
Interface class code allocated by the USB-IF.
bInterfaceNumber
uint8_t bInterfaceNumber
Description
Interface ID.
bInterfaceProtocol
uint8_t bInterfaceProtocol
Description
Protocol code allocated by USB-IF. The value is limited by that of bInterfaceClass and bInterfaceSubClass.
bInterfaceSubClass
uint8_t bInterfaceSubClass
Description
Device subclass code allocated by USB-IF. The value is limited by that of bInterfaceClass.
bInterval
uint8_t bInterval
Description
Interval for polling endpoints for data transfer.
bLength
uint8_t bLength
Description
Size of the descriptor, in bytes.
bmAttributes
uint8_t bmAttributes
Description
Configuration attributes, including the power mode and remote wakeup.
bMaxPacketSize0
uint8_t bMaxPacketSize0
Description
Maximum packet size of endpoint 0. Only values 8, 16, 32, and 64 are valid.
bMaxPower
uint8_t bMaxPower
Description
Maximum power consumption of the bus-powered USB device, in 2 mA.
bNumConfigurations
uint8_t bNumConfigurations
Description
Configuration quantity.
bNumEndpoints
uint8_t bNumEndpoints
Description
Number of endpoints (excluding endpoint 0) used by the interface.
bNumInterfaces
uint8_t bNumInterfaces
Description
Number of interfaces supported by the configuration.
bRefresh
uint8_t bRefresh
Description
Refresh rate for audio devices.
bSynchAddress
uint8_t bSynchAddress
Description
Endpoint synchronization address for audio devices.
endpoint
uint8_t endpoint
Description
Endpoint address.
iConfiguration
uint8_t iConfiguration
Description
Index of the string descriptor that describes the configuration.
idProduct
uint16_t idProduct
Description
Product ID allocated by the vendor.
idVendor
uint16_t idVendor
Description
Vendor ID allocated by USB-IF.
iInterface
uint8_t iInterface
Description
Index of the string descriptor that describes the interface.
iManufacturer
uint8_t iManufacturer
Description
Index of the string descriptor that describes the vendor.
wIndex
uint16_t 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.
interfaceHandle
uint64_t interfaceHandle
Description
Interface operation handle.
iProduct
uint8_t iProduct
Description
Index of the string descriptor that describes the product.
iSerialNumber
uint8_t iSerialNumber
Description
Index of the string descriptor that describes the device SN.
wLength
uint16_t 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 bRequest
Description
Specific request.
bmRequestType
uint8_t bmRequestType
Description
Request type.
timeout
uint32_t timeout
Description
Timeout duration, in milliseconds.
wValue
uint16_t wValue
Description
Value corresponding to wValue in the USB protocol. Its meaning varies according to the request.
wMaxPacketSize
uint16_t wMaxPacketSize
Description
Maximum packet size supported by an endpoint.
wTotalLength
uint16_t wTotalLength
Description
Total length of the configuration descriptor, including the configuration, interface, endpoint, and class- or vendor-specific descriptors.
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