- •TABLE OF CONTENTS
- •1.1 Motivation
- •1.2 Design Goals
- •1.3 Objective of the Specification
- •1.4 Scope of the Document
- •1.5 USB Product Compliance
- •1.6 Document Organization
- •2.1 Terms
- •2.2 Conventions:
- •2.3 References
- •3.1 USB System Description
- •3.1.1 Topology
- •3.1.1.1 USB Host
- •3.1.1.2 Wireless USB Devices
- •3.2 Physical Interface
- •3.3 Power Management
- •3.4 Bus Protocol
- •3.5 Robustness
- •3.5.1 Error Handling
- •3.6 Security
- •3.7 System Configuration
- •3.7.1 Attachment of Wireless USB Devices
- •3.7.2 Removal of Wireless USB Devices
- •3.7.3 Bus Enumeration
- •3.8 Data Flow Types
- •3.9 Wireless USB Devices
- •3.9.1 Device Characterizations
- •3.9.2 Devices and MAC Layer
- •3.10 Wireless USB Host: Hardware and Software
- •4.1 Implementer Viewpoints
- •4.2 Communications Topology
- •4.2.1 Physical Topology
- •4.3 Wireless USB Communication Flows
- •4.3.1 Wireless USB Channel Time
- •4.3.2 MMC Transmission Accuracy
- •4.3.3 USB Time across Device Wire Adapters
- •4.3.5 Device Endpoints
- •4.3.6 Wireless USB Information Exchange Methods
- •4.3.7 Device Perspective
- •4.3.7.1 Self Beaconing Devices
- •4.3.7.2 Directed Beaconing Devices
- •4.3.7.3 Non Beaconing Devices
- •4.3.7.4 Selecting A Wireless USB Host
- •4.3.8 Host Perspective
- •4.3.8.1 MAC Layer Compliant Device
- •4.3.8.2 Wireless USB Host
- •4.3.8.3 Host System Management
- •4.3.8.5 Other Host Considerations
- •4.4 Data Transfers
- •4.4.1 Burst Mode Data Phase
- •4.5 Bulk Transfers
- •4.5.1 Bulk Transfer Packet Size and Signaling Rate Constraints
- •4.5.2 Bulk Transfer Channel Access Constraints
- •4.5.3 Bulk Transfer Data Sequences
- •4.6 Interrupt Transfers
- •4.6.1 Low Power Interrupt IN
- •4.6.2 Interrupt Transfer Packet Size and Signaling Rate Constraints
- •4.6.3 Interrupt Transfer Channel Access Constraints
- •4.6.4 Interrupt Transfer Data Sequences
- •4.7 Isochronous Transfers
- •4.7.1 Isochronous Transfer Packet Size and Signaling Rate Constraints
- •4.7.2 Isochronous Transfer Channel Access Constraints
- •4.7.3 Isochronous Transfer Data Sequences
- •4.7.4 Isochronous Endpoint Host System Admission Decisions
- •4.7.5 Isochronous Data Discards and Use of Isochronous Packet Discard IE
- •4.8 Control Transfers
- •4.8.1 Control Transfer Packet Size and Signaling Rate Constraints
- •4.8.2 Control Transfer Channel Access Constraints
- •4.8.3 Control Transfer Data Sequences
- •4.8.4 Data Loopback Commands
- •4.9 Device Notifications
- •4.10 Media Reliability Considerations
- •4.10.1 Transmit Power Control
- •4.10.2 Adjustments to Data Phase Packet Payload Sizes
- •4.10.3 Adjustments to Transmit Bit Rate
- •4.10.4 Changing PHY Channel
- •4.10.5 Host Schedule Control
- •4.10.6 Dynamic Bandwidth Interface Control
- •4.11 Special Considerations for Isochronous Transfers
- •4.11.1 Summary Of Key Features Of USB Wired Isochrony
- •4.11.1.1 Wireless Service Intervals
- •4.11.2 UWB Media Characteristics
- •4.11.2.1 Superframe Layout
- •4.11.2.2 Worst Case Superframe Layout – Service Interval Bounds.
- •4.11.2.3 Wireless Packet Error Rates
- •4.11.3 Wireless USB Isochronous Transfer Level Protocol
- •4.11.4 Wireless USB Isochronous IN Example
- •4.11.5 Wireless USB Isochronous OUT Example
- •4.11.6 Choosing an Isochronous IN or Isochronous OUT Endpoint Buffer Size
- •4.11.7 Isochronous OUT endpoint receiver implementation options
- •4.11.7.1 Presentation Time aware implementation
- •4.11.7.2 Presentation time aware implementation with “false” acknowledgement
- •4.11.7.3 Presentation time unaware implementations
- •4.11.8 Synchronization
- •4.11.8.1 Synchronizing a Stream Start Time
- •4.11.9 Error Handling Details
- •4.11.9.1 Reporting Data Discarded At the Transmitter
- •4.11.9.2 Discarding Data during A Burst
- •4.11.9.3 Application Handling of Discards
- •4.12 Device Reset
- •4.13 Connection Process
- •4.13.1 Reconnection Process
- •4.14 Disconnect
- •4.15 Security Mechanisms
- •4.15.1 Connection Lifetime
- •4.15.2 Host Security Considerations
- •4.15.2.1 CHID Selection
- •4.15.2.2 CDID Selection
- •4.16 Wireless USB Power Management
- •4.16.1 Device Power Management
- •4.16.1.1 Device Sleep
- •4.16.1.2 Device Wakeup
- •4.16.2 Host Power Management
- •4.16.2.1 Channel Stop
- •4.16.2.2 Remote Wakeup
- •4.16.2.3 Channel Start
- •4.17 Dual Role Devices (DRD)
- •4.17.2 Pairing P2P-DRD to establish reverse link
- •5.1 Packet Formats
- •5.2 Wireless USB Transaction Groups
- •5.2.1 Wireless USB Channel Time Allocation Information Elements
- •5.3 Transaction Group Timing Constraints
- •5.3.1 Streaming-Mode Inter-packet Constraints for the PHY
- •5.3.2 Protocol Synchronization
- •5.4 Data Burst Synchronization and Retry
- •5.5 Wireless USB Transactions
- •5.5.1 Isochronous Transactions
- •5.5.2 Control Transfers
- •5.5.3 Device Notifications
- •5.5.4 Flow Control
- •6.1 Introduction
- •6.1.1 Goal of USB Security
- •6.1.2 Security and USB
- •6.2 Overview
- •6.2.1 Base of Trust
- •6.2.2 Preserve the Nature of the USB Device Model
- •6.2.3 Implementation of Security Extensions
- •6.2.4 Encryption Methods
- •6.2.5 Message Format
- •6.2.6 Encryption Keys
- •6.2.6.1 Master Keys
- •6.2.6.2 Session Keys
- •6.2.7 Correct key determination
- •6.2.8 Replay Prevention
- •6.2.9 Secure Packet Reception
- •6.2.10 General Connection Model
- •6.2.10.1 Connection Context
- •6.2.10.2 Connection Lifetime
- •6.2.10.3 New Connection
- •6.2.10.4 Connection
- •6.2.10.5 Reconnection
- •6.2.10.6 Revocation
- •6.2.10.8 Diagnostic Support
- •6.2.10.9 Mutual Authentication
- •6.2.11 Key Management
- •6.2.11.1 PTK Management
- •6.2.11.2 GTK Management
- •6.3 Association and Authentication
- •6.3.1 Connection and Reconnection Requests
- •6.3.2 Authentication
- •6.3.2.1 Authentication Related Device Capabilities
- •6.3.2.2 Ceremonies
- •6.4.1 CCM nonce Construction
- •6.4.2 l(m) and l(a) Calculation
- •6.4.3 Counter-mode Bx Blocks
- •6.4.4 Encryption Ax Blocks
- •6.5.1 Key Derivation
- •6.5.2 Out-of-band MIC Generation
- •6.5.3 Example Random Number Generation
- •7.1 Wireless USB Device States
- •7.1.1 UnConnected
- •7.1.2 UnAuthenticated
- •7.1.3 Authenticated
- •7.1.4 Reconnecting
- •7.2 Generic Wireless USB Device Operations
- •7.3 Standard Wireless USB Device Requests
- •7.3.1 Wireless USB Extensions to Standard Requests
- •7.3.1.1 Clear Feature
- •7.3.1.2 Get Status
- •7.3.1.3 Set Address
- •7.3.1.4 Set Feature
- •7.3.1.5 Set Interface DS
- •7.3.1.6 Set WUSB Data
- •7.3.1.7 Data Loopback Write
- •7.3.1.8 DATA Loopback Read
- •7.3.2 Security-related Requests
- •7.3.2.1 Get Security Descriptor
- •7.3.2.2 Set Encryption
- •7.3.2.3 Get Encryption
- •7.3.2.4 Key Management
- •7.3.2.6 Set Security Data
- •7.3.2.7 Get Security Data
- •7.4 Standard Wireless USB Descriptors
- •7.4.1 Device Level Descriptors
- •7.4.1.1 Wireless USB Device Capabilities – UWB
- •7.4.2 Configuration
- •7.4.3 Endpoint
- •7.4.4 Wireless USB Endpoint Companion
- •7.4.5 Security-Related Descriptors
- •7.4.5.1 Security Descriptor
- •7.4.5.2 Key Descriptor
- •7.5 Wireless USB Channel Information Elements
- •7.5.1 Wireless USB Connect Acknowledge IE
- •7.5.2 Wireless USB Host Information IE
- •7.5.3 Wireless USB Channel Change Announcement IE
- •7.5.4 Wireless USB Device Disconnect IE
- •7.5.5 Wireless USB Host Disconnect IE
- •7.5.6 Wireless USB Release Channel IE
- •7.5.7 Wireless USB Work IE
- •7.5.8 Wireless USB Channel Stop IE
- •7.5.9 Wireless USB Device Keepalive IE
- •7.5.10 Wireless USB Isochronous Packet Discard IE
- •7.5.11 Wireless USB Reset Device IE
- •7.5.12 Wireless USB Transmit Packet Adjustment IE
- •7.6 Device Notifications
- •7.6.1 Device Connect (DN_Connect)
- •7.6.1.1 Connect Request
- •7.6.1.2 Reconnect Request
- •7.6.2 Device Disconnect (DN_Disconnect)
- •7.6.3 Device Endpoints Ready (DN_EPRdy)
- •7.6.4 Device MAS Availability Changed (DN_MASAvailChanged)
- •7.6.5 Device Sleep (DN_Sleep)
- •7.6.6 Remote Wakeup (DN_RemoteWakeup)
- •7.6.7 Device Alive (DN_Alive)
- •8.1 Operational Model
- •8.1.1 Functional Characteristics
- •8.1.2 Data Transfer Interface
- •8.1.3 Remote Pipe
- •8.1.4 Wire Adapter Functional Blocks
- •8.1.5 Downstream Port(s)
- •8.1.6 Upstream Port
- •8.1.7 Downstream Host Controller
- •8.1.8 Upstream Endpoint Controller
- •8.1.9 Remote Pipe Controller
- •8.1.9.1 RPipe Descriptor
- •8.1.9.2 Bulk OUT Overview
- •8.1.9.3 Bulk IN Overview
- •8.1.9.4 Control Transfer Overview
- •8.1.9.5 Interrupt Transfer Overview
- •8.1.9.6 Isochronous Transfer Overview
- •8.1.10 Suspend and Resume
- •8.1.10.1 DWA Suspend and Resume
- •8.1.10.2 HWA Suspend and Resume
- •8.1.11 Reset Behavior
- •8.1.12 Device Control
- •8.1.13 Buffer Configuration
- •8.2 Descriptors
- •8.3 Requests
- •8.3.1 Wire Adapter Class-Specific Requests
- •8.3.1.1 Abort RPipe
- •8.3.1.2 Clear RPipe Feature
- •8.3.1.3 Clear Wire Adapter Feature
- •8.3.1.4 Get RPipe Descriptor
- •8.3.1.5 Get RPipe Status
- •8.3.1.6 Get Wire Adapter Status
- •8.3.1.7 Set RPipe Descriptor
- •8.3.1.8 Set RPipe Feature
- •8.3.1.9 Set Wire Adapter Feature
- •8.3.1.10 Reset RPipe
- •8.3.2 Notification Information
- •8.3.3 Transfer Requests
- •8.3.3.1 Control Transfers
- •8.3.3.2 Bulk and Interrupt Transfers
- •8.3.3.3 Transfer Completion Notification
- •8.3.3.4 Transfer Result
- •8.3.3.5 Abort Transfer
- •8.4 DWA Interfaces, Descriptors and Control
- •8.4.1 DWA Isochronous Streaming Interface
- •8.4.2 DWA Isochronous Streaming Overview
- •8.4.3 DWA Descriptors
- •8.4.3.1 Device Descriptor
- •8.4.3.2 Binary Device Object (BOS) Descriptor
- •8.4.3.3 Configuration Descriptor
- •8.4.3.4 Security Descriptors
- •8.4.3.5 Interface Association Descriptor
- •8.4.3.6 Data Transfer Interface Descriptor
- •8.4.3.7 Wire Adapter Class Descriptor
- •8.4.3.8 Notification Endpoint Descriptor
- •8.4.3.9 Notification Endpoint Companion Descriptor
- •8.4.3.10 Data Transfer Write Endpoint Descriptor
- •8.4.3.11 Data Transfer Write Endpoint Companion Descriptor
- •8.4.3.12 Data Transfer Read Endpoint Descriptor
- •8.4.3.13 Data Transfer Read Endpoint Companion Descriptor
- •8.4.3.14 Isochronous Streaming Interface Descriptor
- •8.4.3.15 Isochronous Streaming OUT Endpoint Descriptor
- •8.4.3.16 Isochronous Streaming OUT Endpoint Companion Descriptor
- •8.4.3.17 Isochronous Streaming IN Endpoint Descriptor
- •8.4.3.18 Isochronous Streaming IN Endpoint Companion Descriptor
- •8.4.3.19 Wire Adapter RPipe Descriptor
- •8.4.4 DWA Specific Requests
- •8.4.4.1 Clear Port Feature
- •8.4.4.2 Get Port Status
- •8.4.4.3 Set Isochronous Endpoint Attributes
- •8.4.4.4 Set Port Feature
- •8.4.5 DWA Notification Information
- •8.4.5.1 Remote Wake
- •8.4.5.2 Port Status Change
- •8.4.6 DWA Isochronous Transfers
- •8.4.6.1 DWA Isochronous OUT Responsibilities
- •8.4.6.2 DWA Isochronous IN Responsibilities
- •8.5 HWA Interfaces, Descriptors and Control
- •8.5.1 HWA Isochronous Streaming Overview
- •8.5.2 HWA Descriptors
- •8.5.2.1 Device Descriptor
- •8.5.2.2 Device_Qualifier Descriptor
- •8.5.2.3 Configuration Descriptor
- •8.5.2.4 Other_Speed_Configuration Descriptor
- •8.5.2.5 Security Descriptors
- •8.5.2.6 Data Transfer Interface Descriptor
- •8.5.2.7 Wire Adapter Class Descriptor
- •8.5.2.8 Notification Endpoint Descriptor
- •8.5.2.9 Data Transfer Write Endpoint Descriptor
- •8.5.2.10 Data Transfer Read Endpoint Descriptor
- •8.5.2.11 Wire Adapter RPipe Descriptor
- •8.5.3 HWA Specific Requests
- •8.5.3.2 Get BPST Adjustment
- •8.5.3.3 Get BPST Time
- •8.5.3.4 Get WUSB Time
- •8.5.3.5 Remove MMC IE
- •8.5.3.6 Set Device Encryption
- •8.5.3.7 Set Device Info
- •8.5.3.8 Set Device Key
- •8.5.3.9 Set Group Key
- •8.5.3.10 Set Num DNTS Slots
- •8.5.3.11 Set WUSB Cluster ID
- •8.5.3.12 Set WUSB MAS
- •8.5.3.13 Set WUSB Stream Index
- •8.5.3.14 WUSB Channel Stop
- •8.5.4 HWA Notification Information
- •8.5.4.1 BPST Adjustment Change
- •8.5.4.2 DN Received Notification
- •8.5.5 HWA Isochronous Transfers
- •8.5.5.1 HWA Isochronous OUT Responsibilities
- •8.5.5.2 HWA Isochronous IN Responsibilities
- •8.5.5.3 HWA Isochronous Transfer Completion
- •8.6 Radio Control Interface
- •8.6.1 Radio Control Descriptors
- •8.6.1.1 Radio Control Interface Descriptor
- •8.6.1.2 Radio Control Interface Class Descriptor
- •8.6.1.3 Radio Control Interrupt Endpoint Descriptor
- •8.6.2 Radio Control Command
- •8.6.2.1 Channel Change
- •8.6.2.2 Device Address Management
- •8.6.2.4 Reset
- •8.6.2.5 Scan
- •8.6.2.6 Set Beacon Filter
- •8.6.2.9 Set Notification Filter
- •8.6.2.10 Set TX Power
- •8.6.2.11 Sleep
- •8.6.2.12 Start Beaconing
- •8.6.2.13 Stop Beaconing
- •8.6.3 Radio Control Notifications
- •8.6.3.1 Application-specific Probe IE Received Notification
- •8.6.3.2 Beacon Received Notification
- •8.6.3.3 Beacon Size Notification
- •8.6.3.4 BPOIE Change Notification
- •8.6.3.5 BP Slot Change Notification
- •8.6.3.6 BP Switch IE Received Notification
- •8.6.3.7 Device Address Conflict Notification
- •8.6.3.8 DRP Availability Changed Notification
- •8.6.3.9 DRP Notification
- •A.1 Key Derivation
- •A.2 Handshake MIC calculation
- •A.3 Secure MMC (EO = payload length)
- •A.4 Data IN from device (EO = 2)
- •B.1 Descriptors for DWA
- •B.2 Descriptors for HWA
Chapter 8 |
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Wire Adapter |
Wireless Universal Serial Bus Specification, Revision 1.0 |
8.5.3.7 Set Device Info
This request sets the device information buffer that is associated with the device connected downstream of the HWA.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
SET_DEVICE_INFO |
Zero |
Device Index |
36 |
Device |
|
|
|
and Interface |
|
Information |
|
|
|
Number |
|
Buffer |
|
|
|
|
|
|
On reception of this request, the HWA will store the device information buffer for the downstream connected device. The format of the device information buffer is given below. The number of devices that an HWA can support at the same time is specified by the bNumPorts field in the Wire Adapter descriptor. The upper byte of wIndex (Device Index) can be any value between 0 and bNumPorts – 1.
The lower byte of wIndex specifies the target interface number.
Table 8-54. Device Information Buffer Format
Offset |
Field |
Size |
Value |
|
Description |
|
|
|
|
|
|
0 |
bmDeviceAvailabilityInfo |
32 |
Bitmap |
This bitmap specifies the MAS slots in which the |
|
|
|
|
|
WUSB device can communicate with the host. |
|
|
|
|
|
|
|
32 |
bDeviceAddress |
1 |
Number |
Address of the attached device |
|
|
|
|
|
|
|
33 |
wPHYRates |
2 |
Bitmap |
Describes the PHY-level signaling rates |
|
|
|
|
|
capabilities of this device implementation |
|
|
|
|
|
represented as a bit-mask. See Section 7.4.1.1 |
|
|
|
|
|
|
|
35 |
bmDeviceAttribute |
1 |
Bitmap |
|
|
|
|
|
|
Bit |
Description |
|
|
|
|
6:0 |
Reserved |
|
|
|
|
7 |
Disable. If this bit is set to a |
|
|
|
|
|
1B, then the HWA must not |
|
|
|
|
|
perform any transactions to |
|
|
|
|
|
this device. |
It is a Request Error if wLength is other than as specified above or if the Device Index is greater than or equal to the bNumPorts field in the Wire Adapter descriptor.
If the interface specified does not exist, then the device responds with a Request Error.
If the Host Wire Adapter is not configured, the Host Wire Adapter’s response to this request is undefined.
8.5.3.8 Set Device Key
This request sets the key to be used to encrypt/decrypt data when the HWA is sending/receiving data to/from the device connected downstream of the HWA.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
SET_DESCRIPTOR |
Descriptor |
Device Index |
Key |
Key |
|
|
Type and Key |
and Interface |
Descriptor |
Descriptor |
|
|
Index |
Number |
Length |
|
|
|
|
|
|
|
When the HWA receives this command, it uses the key data in the accompanying key descriptor to update its copy of the key to be used when sending/receiving data from this device. Host Wire Adapters are only required to support one key per device.
The upper byte of the wIndex field specifies the Device index. The Device Index must be less than the bNumPorts field in the Wire Adapter descriptor.
248
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Wire Adapter |
Wireless Universal Serial Bus Specification, Revision 1.0 |
The lower byte of wIndex specifies the target interface number.
It is a Request Error if wValue is other than as specified above or if the Device index greater than or equal to the bNumPorts field in the Wire Adapter descriptor.
If the interface specified does not exist, then the device responds with a Request Error.
If the Host Wire Adapter is not configured, the Host Wire Adapter’s response to this request is undefined.
8.5.3.9 Set Group Key
This request sets the Group key to be used to encrypt data when the HWA is sending data to the WUSB cluster.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
SET_DESCRIPTOR |
Descriptor |
Interface |
Key |
Key |
|
|
Type and Key |
Number |
Descriptor |
Descriptor |
|
|
Index |
|
Length |
|
|
|
|
|
|
|
When the HWA receives this command, it uses the key data in the accompanying key descriptor to update its copy of the Group key to be used when sending data to the WUSB cluster.
The lower byte of wIndex specifies the target interface number. It is a Request Error if wLength is other than as specified above.
If the interface specified does not exist, then the device responds with a Request Error.
If the Host Wire Adapter is not configured, the Host Wire Adapter’s response to this request is undefined.
8.5.3.10Set Num DNTS Slots
This request sets the interval and raw number of notification message time slots available in the DNTS.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
SET_NUM_DNTS |
Interval |
Interface |
Zero |
None |
|
|
And Number of |
Number |
|
|
|
|
|
|
|
|
|
|
DNTS Slots |
|
|
|
|
|
|
|
|
|
Upon receipt of this request, the HWA will schedule DNTS time slots in subsequent transaction groups. The upper byte of the wValue field (Interval) specifies the rate at which the HWA must schedule a DNTS time slot. If the Interval value is set to zero, then the HWA must schedule a DNTS in every transaction group. This field is expressed in milliseconds.
The lower byte of the wValue field specifies the number of slots that must be available. The lower byte of wIndex specifies the target interface number.
It is a Request Error if wLength is other than as specified above.
If the interface specified does not exist, then the device responds with a Request Error.
If the Host Wire Adapter is not configured, the Host Wire Adapter’s response to this request is undefined.
8.5.3.11Set WUSB Cluster ID
This request sets the WUSB Cluster ID.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
SET_CLUSTER_ID |
Cluster ID |
Interface |
Zero |
None |
|
|
|
Number |
|
|
|
|
|
|
|
|
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Wire Adapter |
Wireless Universal Serial Bus Specification, Revision 1.0 |
This request sets the WUSB Cluster ID for this HWA. The wValue field specifies the Cluster Id.
The lower byte of wIndex specifies the target interface number. It is a Request Error if wLength is other than as specified above.
If the interface specified does not exist, then the device responds with a Request Error.
If the Host Wire Adapter is not configured, the Host Wire Adapter’s response to this request is undefined.
8.5.3.12Set WUSB MAS
This request sets the MAS that the HWA can perform transaction in.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
SET_WUSM_MAS |
Zero |
Interface |
32 |
WUSB MAS |
|
|
|
Number |
|
|
|
|
|
|
|
|
This request is used to set/update the currently available Media Access Slots that an HWA can use. WUSB MAS is an array of 256 entries, each of which corresponds to one of the 256 MAS within a superframe. The zero entries identify MAS that cannot be used by the HWA while nonzero entries identify MAS in which an HWA may perform WUSB transactions.
The lower byte of wIndex specifies the target interface number. It is a Request Error if wLength is other than as specified above.
If the interface specified does not exist, then the device responds with a Request Error.
If the Host Wire Adapter is not configured, the Host Wire Adapter’s response to this request is undefined.
8.5.3.13Set WUSB Stream Index
This request sets the WUSB Stream Index.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
SET_STREAM_IDX |
Stream Index |
Interface |
Zero |
None |
|
|
|
Number |
|
|
This request sets the WUSB Stream Index for this HWA. The wValue field specifies the Stream Index.
The lower byte of wIndex specifies the target interface number. It is a Request Error if wLength is other than as specified above.
If the interface specified does not exist, then the device responds with a Request Error.
If the Host Wire Adapter is not configured, the Host Wire Adapter’s response to this request is undefined.
8.5.3.14WUSB Channel Stop
This request is used to stop the WUSB channel.
bmRequestType |
bRequest |
wValue |
wIndex |
wLength |
Data |
|
|
|
|
|
|
00100001B |
WUSB_CH_STOP |
WUSB |
Interface |
Zero |
None |
|
|
Channel Time |
Number |
|
|
|
|
Offset |
|
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On reception of this request, the HWA must stop the Wireless USB channel as described in Section 4.16.2.1 of the Data Flow chapter. The wValue field (WUSB Channel Time Offset) specifies the offset in microseconds
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