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We need a usb hub to work with a usb wifi and 3 usb cameras. We want to on/off cameras and wifi with a control card. Our supplier designed a usb hub for us. But we cant get camera images with this hub.
The hub works with a mouse. Also it shows cameras but there is no image (black screen) and the resolution is only 160x120. We can not increase the resolution also. We think that the usb hub works at low speed mode. Becasue when a usb flash disk is connected the write/read speed is 1 Mbit/sec.
Thank you very much. You can see the result as below.
[Port3] : USB Hub
External Hub: USB#VID_0451&PID_2046#5&7861f83&0&3#{f18a0e88-c30c-11d0-8815-00a0c906bed8}
Hub Power: Self Power
Number of Ports: 4
Power switching: Ganged
Compound device: No
Over-current Protection: Global
High speed capable: No
High speed: No
Multiple transaction translations capable: No
Performs multiple transaction translations simultaneously: No
Hub wakes when device is connected: No
Hub is bus powered: No
Hub is root: No
---===>Device Information<===---
ConnectionStatus:
Current Config Value: 0x01 -> Device Bus Speed: Full
Device Address: 0x32
Open Pipes: 1
===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0110
bDeviceClass: 0x09 -> This is a HUB Device
bDeviceSubClass: 0x00
bDeviceProtocol: 0x00
bMaxPacketSize0: 0x08 = (8) Bytes
idVendor: 0x0451 = Texas Instruments
idProduct: 0x2046
bcdDevice: 0x0125
iManufacturer: 0x00
iProduct: 0x00
iSerialNumber: 0x00
bNumConfigurations: 0x01
---===>Open Pipes<===---
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0001 = 0x01 bytes
bInterval: 0xFF
---===>Full Configuration Descriptor<===---
===>Configuration Descriptor<===
bLength: 0x09
bDescriptorType: 0x02
wTotalLength: 0x0019 -> Validated
bNumInterfaces: 0x01
bConfigurationValue: 0x01
iConfiguration: 0x00
bmAttributes: 0xE0 -> Self Powered
-> Remote Wakeup
MaxPower: 0x00 = 0 mA
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x00
bAlternateSetting: 0x00
bNumEndpoints: 0x01
bInterfaceClass: 0x09 -> HUB Interface Class
bInterfaceSubClass: 0x00
bInterfaceProtocol: 0x00
iInterface: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0001 = 0x01 bytes
bInterval: 0xFF
[Port1] : USB Composite Device -camera
Device Power State: PowerDeviceD0
---===>Device Information<===---
English product name: "292A-IPC-OV2710"
ConnectionStatus:
Current Config Value: 0x01 -> Device Bus Speed: Full
Device Address: 0x3C
Open Pipes: 1
===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0200
bDeviceClass: 0xEF -> This is a Multi-interface Function Code Device
bDeviceSubClass: 0x02 -> This is the Common Class Sub Class
bDeviceProtocol: 0x01 -> This is the Interface Association Descriptor protocol
bMaxPacketSize0: 0x40 = (64) Bytes
idVendor: 0x0C45 = Sonix Technology Co., Ltd.
idProduct: 0x6366
bcdDevice: 0x0100
iManufacturer: 0x02
English (United States) "Sonix Technology Co., Ltd."
iProduct: 0x01
English (United States) "292A-IPC-OV2710"
iSerialNumber: 0x03
English (United States) "SN0001"
bNumConfigurations: 0x01
---===>Open Pipes<===---
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x83 -> Direction: IN - EndpointID: 3
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0010 = 0x10 bytes
bInterval: 0x06
---===>Full Configuration Descriptor<===---
===>Configuration Descriptor<===
bLength: 0x09
bDescriptorType: 0x02
wTotalLength: 0x022E -> Validated
bNumInterfaces: 0x04
bConfigurationValue: 0x01
iConfiguration: 0x00
bmAttributes: 0x80 -> Bus Powered
MaxPower: 0xFA = 500 mA
===>IAD Descriptor<===
bLength: 0x08
bDescriptorType: 0x0B
bFirstInterface: 0x00
bInterfaceCount: 0x02
bFunctionClass: 0x0E -> Video Interface Class
bFunctionSubClass: 0x03 -> Video Interface Collection
bFunctionProtocol: 0x00 -> PC_PROTOCOL_UNDEFINED protocol
iFunction: 0x05
English (United States) "yealink usbcam"
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x00
bAlternateSetting: 0x00
bNumEndpoints: 0x01
bInterfaceClass: 0x0E -> Video Interface Class
bInterfaceSubClass: 0x01 -> Video Control Interface SubClass
bInterfaceProtocol: 0x00
iInterface: 0x05
English (United States) "yealink usbcam"
===>Class-Specific Video Control Interface Header Descriptor<===
bLength: 0x0D
bDescriptorType: 0x24
bDescriptorSubtype: 0x01
bcdVDC: 0x0100
wTotalLength: 0x006A -> Validated
dwClockFreq: 0x00E4E1C0 = (15000000) Hz
bInCollection: 0x01
baInterfaceNr[1]: 0x01
USB Video Class device: spec version 1.0
===>Video Control Output Terminal Descriptor<===
bLength: 0x09
bDescriptorType: 0x24
bDescriptorSubtype: 0x03
bTerminalID: 0x05
wTerminalType: 0x0101 = (TT_STREAMING)
bAssocTerminal: 0x00
bSourceID: 0x04
iTerminal: 0x00
===>Video Control Extension Unit Descriptor<===
bLength: 0x1C
bDescriptorType: 0x24
bDescriptorSubtype: 0x06
bUnitID: 0x03
guidExtensionCode: {28F03370-6311-4A2E-BA2C-6890EB334016}
bNumControls: 0x18
bNrInPins: 0x01
===>List of Connected Units and Terminal ID's
baSourceID[1]: 0x02
bControlSize: 0x03
bmControls : 0xFF 0xFF 0xFF
D00 = 1 yes - Vendor-Specific (Optional)
D01 = 1 yes - Vendor-Specific (Optional)
D02 = 1 yes - Vendor-Specific (Optional)
D03 = 1 yes - Vendor-Specific (Optional)
D04 = 1 yes - Vendor-Specific (Optional)
D05 = 1 yes - Vendor-Specific (Optional)
D06 = 1 yes - Vendor-Specific (Optional)
D07 = 1 yes - Vendor-Specific (Optional)
D08 = 1 yes - Vendor-Specific (Optional)
D09 = 1 yes - Vendor-Specific (Optional)
D10 = 1 yes - Vendor-Specific (Optional)
D11 = 1 yes - Vendor-Specific (Optional)
D12 = 1 yes - Vendor-Specific (Optional)
D13 = 1 yes - Vendor-Specific (Optional)
D14 = 1 yes - Vendor-Specific (Optional)
D15 = 1 yes - Vendor-Specific (Optional)
D16 = 1 yes - Vendor-Specific (Optional)
D17 = 1 yes - Vendor-Specific (Optional)
D18 = 1 yes - Vendor-Specific (Optional)
D19 = 1 yes - Vendor-Specific (Optional)
D20 = 1 yes - Vendor-Specific (Optional)
D21 = 1 yes - Vendor-Specific (Optional)
D22 = 1 yes - Vendor-Specific (Optional)
D23 = 1 yes - Vendor-Specific (Optional)
iExtension: 0x00
===>Video Control Extension Unit Descriptor<===
bLength: 0x1B
bDescriptorType: 0x24
bDescriptorSubtype: 0x06
bUnitID: 0x04
guidExtensionCode: {DDDF7394-973E-4727-BED9-04ED6426DC67}
bNumControls: 0x10
bNrInPins: 0x01
===>List of Connected Units and Terminal ID's
baSourceID[1]: 0x03
bControlSize: 0x02
bmControls : 0xFF 0x01
D00 = 1 yes - Vendor-Specific (Optional)
D01 = 1 yes - Vendor-Specific (Optional)
D02 = 1 yes - Vendor-Specific (Optional)
D03 = 1 yes - Vendor-Specific (Optional)
D04 = 1 yes - Vendor-Specific (Optional)
D05 = 1 yes - Vendor-Specific (Optional)
D06 = 1 yes - Vendor-Specific (Optional)
D07 = 1 yes - Vendor-Specific (Optional)
D08 = 1 yes - Vendor-Specific (Optional)
D09 = 0 no - Vendor-Specific (Optional)
D10 = 0 no - Vendor-Specific (Optional)
D11 = 0 no - Vendor-Specific (Optional)
D12 = 0 no - Vendor-Specific (Optional)
D13 = 0 no - Vendor-Specific (Optional)
D14 = 0 no - Vendor-Specific (Optional)
D15 = 0 no - Vendor-Specific (Optional)
iExtension: 0x00
===>Video Control Input Terminal Descriptor<===
bLength: 0x12
bDescriptorType: 0x24
bDescriptorSubtype: 0x02
bTerminalID: 0x01
wTerminalType: 0x0201 = (ITT_CAMERA)
bAssocTerminal: 0x00
iTerminal: 0x00
===>Camera Input Terminal Data
wObjectiveFocalLengthMin: 0x0000
wObjectiveFocalLengthMax: 0x0000
wOcularFocalLength: 0x0000
bControlSize: 0x03
bmControls : 0x0E 0x00 0x00
D00 = 0 no - Scanning Mode
D01 = 1 yes - Auto-Exposure Mode
D02 = 1 yes - Auto-Exposure Priority
D03 = 1 yes - Exposure Time (Absolute)
D04 = 0 no - Exposure Time (Relative)
D05 = 0 no - Focus (Absolute)
D06 = 0 no - Focus (Relative)
D07 = 0 no - Iris (Absolute)
D08 = 0 no - Iris (Relative)
D09 = 0 no - Zoom (Absolute)
D10 = 0 no - Zoom (Relative)
D11 = 0 no - PanTilt (Absolute)
D12 = 0 no - PanTilt (Relative)
D13 = 0 no - Roll (Absolute)
D14 = 0 no - Roll (Relative)
D15 = 0 no - Reserved
D16 = 0 no - Reserved
D17 = 0 no - Focus, Auto
D18 = 0 no - Privacy
D19 = 0 no - Focus, Simple
D20 = 0 no - Window
D21 = 0 no - Region of Interest
D22 = 0 no - Reserved
D23 = 0 no - Reserved
===>Video Control Processing Unit Descriptor<===
bLength: 0x0B
bDescriptorType: 0x24
bDescriptorSubtype: 0x05
bUnitID: 0x02
bSourceID: 0x01
wMaxMultiplier: 0x0000
bControlSize: 0x02
bmControls : 0x7F 0x17
D00 = 1 yes - Brightness
D01 = 1 yes - Contrast
D02 = 1 yes - Hue
D03 = 1 yes - Saturation
D04 = 1 yes - Sharpness
D05 = 1 yes - Gamma
D06 = 1 yes - White Balance Temperature
D07 = 0 no - White Balance Component
D08 = 1 yes - Backlight Compensation
D09 = 1 yes - Gain
D10 = 1 yes - Power Line Frequency
D11 = 0 no - Hue, Auto
D12 = 1 yes - White Balance Temperature, Auto
D13 = 0 no - White Balance Component, Auto
D14 = 0 no - Digital Multiplier
D15 = 0 no - Digital Multiplier Limit
iProcessing : 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x83 -> Direction: IN - EndpointID: 3
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0010 = 0x10 bytes
bInterval: 0x06
===>Class-specific VC Interrupt Endpoint Descriptor<===
bLength: 0x05
bDescriptorType: 0x25
bDescriptorSubtype: 0x03
wMaxTransferSize: 0x0040 = (64) Bytes
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x01
bAlternateSetting: 0x00
bNumEndpoints: 0x00
bInterfaceClass: 0x0E -> Video Interface Class
bInterfaceSubClass: 0x02 -> Video Streaming Interface SubClass
bInterfaceProtocol: 0x00
iInterface: 0x00
===>Video Class-Specific VS Video Input Header Descriptor<===
bLength: 0x0F
bDescriptorType: 0x24
bDescriptorSubtype: 0x01
bNumFormats: 0x02
wTotalLength: 0x0103 -> Validated
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmInfo: 0x00 -> Dynamic Format Change not Supported
bTerminalLink: 0x05
bStillCaptureMethod: 0x00 -> No Still Capture
bTriggerSupport: 0x00 -> No Hardware Triggering Support
bTriggerUsage: 0x00
bControlSize: 0x01
Video Payload Format 1 0x00
D00 = 0 no - Key Frame Rate
D01 = 0 no - P Frame Rate
D02 = 0 no - Compression Quality
D03 = 0 no - Compression Window Size
D04 = 0 no - Generate Key Frame
D05 = 0 no - Update Frame Segment
D06 = 0 no - Reserved
D07 = 0 no - Reserved
Video Payload Format 2 0x00
D00 = 0 no - Key Frame Rate
D01 = 0 no - P Frame Rate
D02 = 0 no - Compression Quality
D03 = 0 no - Compression Window Size
D04 = 0 no - Generate Key Frame
D05 = 0 no - Update Frame Segment
D06 = 0 no - Reserved
D07 = 0 no - Reserved
===>Video Streaming Uncompressed Format Type Descriptor<===
bLength: 0x1B
bDescriptorType: 0x24
bDescriptorSubtype: 0x04
bFormatIndex: 0x01
bNumFrameDescriptors: 0x02
guidFormat: {32595559-0000-0010-8000-00AA00389B71} = YUY2 Format
bBitsPerPixel: 0x10
bDefaultFrameIndex: 0x01
bAspectRatioX: 0x00
bAspectRatioY: 0x00
bmInterlaceFlags: 0x00
D0 = 0x00 Interlaced stream or variable: No
D1 = 0x00 Fields per frame: 2 fields
D2 = 0x00 Field 1 first: No
D3 = 0x00 Reserved
D4..5 = 0x00 Field patterns -> Field 1 only
D6..7 = 0x00 Display Mode -> Bob only
bCopyProtect: 0x00 -> Duplication Unrestricted
===>Video Streaming Uncompressed Frame Type Descriptor<===
--->This is the Default (optimum) Frame index
bLength: 0x32
bDescriptorType: 0x24
bDescriptorSubtype: 0x05
bFrameIndex: 0x01
bmCapabilities: 0x00
wWidth: 0x00A0 = 160
wHeight: 0x0078 = 120
dwMinBitRate: 0x00177000
dwMaxBitRate: 0x008CA000
dwMaxVideoFrameBufferSize: 0x00009600
dwDefaultFrameInterval: 0x00051615 = 33.333300 mSec (30.00 Hz)
bFrameIntervalType: 0x06
===>Additional Discrete Frame Type Data
dwFrameInterval[1]: 0x00051615 = 33.333300 mSec (30.00 Hz)
dwFrameInterval[2]: 0x00061A80 = 40.000000 mSec (25.00 Hz)
dwFrameInterval[3]: 0x0007A120 = 50.000000 mSec (20.00 Hz)
dwFrameInterval[4]: 0x000A2C2A = 66.666600 mSec (15.00 Hz)
dwFrameInterval[5]: 0x000F4240 = 100.000000 mSec (10.00 Hz)
dwFrameInterval[6]: 0x001E8480 = 200.000000 mSec (5.00 Hz)
===>Video Streaming Uncompressed Frame Type Descriptor<===
bLength: 0x32
bDescriptorType: 0x24
bDescriptorSubtype: 0x05
bFrameIndex: 0x02
bmCapabilities: 0x00
wWidth: 0x00A0 = 160
wHeight: 0x0078 = 120
dwMinBitRate: 0x00177000
dwMaxBitRate: 0x008CA000
dwMaxVideoFrameBufferSize: 0x00009600
dwDefaultFrameInterval: 0x00051615 = 33.333300 mSec (30.00 Hz)
bFrameIntervalType: 0x06
===>Additional Discrete Frame Type Data
dwFrameInterval[1]: 0x00051615 = 33.333300 mSec (30.00 Hz)
dwFrameInterval[2]: 0x00061A80 = 40.000000 mSec (25.00 Hz)
dwFrameInterval[3]: 0x0007A120 = 50.000000 mSec (20.00 Hz)
dwFrameInterval[4]: 0x000A2C2A = 66.666600 mSec (15.00 Hz)
dwFrameInterval[5]: 0x000F4240 = 100.000000 mSec (10.00 Hz)
dwFrameInterval[6]: 0x001E8480 = 200.000000 mSec (5.00 Hz)
===>Video Streaming MJPEG Format Type Descriptor<===
bLength: 0x0B
bDescriptorType: 0x24
bDescriptorSubtype: 0x06
bFormatIndex: 0x02
bNumFrameDescriptors: 0x02
bmFlags: 0x00 -> Sample Size is Not Fixed
bDefaultFrameIndex: 0x01
bAspectRatioX: 0x00
bAspectRatioY: 0x00
bmInterlaceFlags: 0x00
D00 = 0 non-Interlaced stream or variable
D01 = 0 2 fields per frame
D02 = 0 Field 1 not first
D03 = 0 Reserved
D4..5 = 0 Field patterns -> Field 1 only
D6..7 = 0 Display Mode -> Bob only
bCopyProtect: 0x00 -> Duplication Unrestricted
===>Video Streaming MJPEG Frame Type Descriptor<===
--->This is the Default (optimum) Frame index
bLength: 0x32
bDescriptorType: 0x24
bDescriptorSubtype: 0x07
bFrameIndex: 0x01
bmCapabilities: 0x00
wWidth: 0x00A0 = 160
wHeight: 0x0078 = 120
dwMinBitRate: 0x000BB800
dwMaxBitRate: 0x00465000
dwMaxVideoFrameBufferSize: 0x00004D4D
dwDefaultFrameInterval: 0x00051615 = 33.333300 mSec (30.00 Hz)
bFrameIntervalType: 0x06
===>Additional Discrete Frame TypeData
dwFrameInterval[1]: 0x00051615 = 33.333300 mSec (30.00 Hz)
dwFrameInterval[2]: 0x00061A80 = 40.000000 mSec (25.00 Hz)
dwFrameInterval[3]: 0x0007A120 = 50.000000 mSec (20.00 Hz)
dwFrameInterval[4]: 0x000A2C2A = 66.666600 mSec (15.00 Hz)
dwFrameInterval[5]: 0x000F4240 = 100.000000 mSec (10.00 Hz)
dwFrameInterval[6]: 0x001E8480 = 200.000000 mSec (5.00 Hz)
===>Video Streaming MJPEG Frame Type Descriptor<===
bLength: 0x32
bDescriptorType: 0x24
bDescriptorSubtype: 0x07
bFrameIndex: 0x02
bmCapabilities: 0x00
wWidth: 0x00A0 = 160
wHeight: 0x0078 = 120
dwMinBitRate: 0x000BB800
dwMaxBitRate: 0x00465000
dwMaxVideoFrameBufferSize: 0x00004D4D
dwDefaultFrameInterval: 0x00051615 = 33.333300 mSec (30.00 Hz)
bFrameIntervalType: 0x06
===>Additional Discrete Frame TypeData
dwFrameInterval[1]: 0x00051615 = 33.333300 mSec (30.00 Hz)
dwFrameInterval[2]: 0x00061A80 = 40.000000 mSec (25.00 Hz)
dwFrameInterval[3]: 0x0007A120 = 50.000000 mSec (20.00 Hz)
dwFrameInterval[4]: 0x000A2C2A = 66.666600 mSec (15.00 Hz)
dwFrameInterval[5]: 0x000F4240 = 100.000000 mSec (10.00 Hz)
dwFrameInterval[6]: 0x001E8480 = 200.000000 mSec (5.00 Hz)
===>Color Matching Descriptor<===
bLength: 0x06
bDescriptorType: 0x24
bDescriptorSubtype: 0x0D
bColorPrimaries: 0x01
bTransferCharacteristics: 0x01
bMatrixCoefficients: 0x04
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x01
bAlternateSetting: 0x01
bNumEndpoints: 0x01
bInterfaceClass: 0x0E -> Video Interface Class
bInterfaceSubClass: 0x02 -> Video Streaming Interface SubClass
bInterfaceProtocol: 0x00
iInterface: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmAttributes: 0x05 -> Isochronous Transfer Type, Synchronization Type = Asynchronous, Usage Type = Data Endpoint
wMaxPacketSize: 0x0320 = 0x320 bytes
bInterval: 0x01
===>IAD Descriptor<===
bLength: 0x08
bDescriptorType: 0x0B
bFirstInterface: 0x02
bInterfaceCount: 0x02
bFunctionClass: 0x01 -> Audio Interface Class
bFunctionSubClass: 0x00
*!*CAUTION: This appears to be an invalid bFunctionSubClass
bFunctionProtocol: 0x00
iFunction: 0x00
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x02
bAlternateSetting: 0x00
bNumEndpoints: 0x00
bInterfaceClass: 0x01 -> Audio Interface Class
bInterfaceSubClass: 0x01 -> Audio Control Interface SubClass
bInterfaceProtocol: 0x00
iInterface: 0x00
===>Audio Control Interface Header Descriptor<===
bLength: 0x09
bDescriptorType: 0x24
bDescriptorSubtype: 0x01
bcdADC: 0x0100
wTotalLength: 0x002B
bInCollection: 0x01
baInterfaceNr[1]: 0x03
===>Audio Control Input Terminal Descriptor<===
bLength: 0x0C
bDescriptorType: 0x24
bDescriptorSubtype: 0x02
bTerminalID: 0x01
wTerminalType: 0x0201 (Microphone)
bAssocTerminal: 0x00
bNrChannels: 0x02
wChannelConfig: 0x0000
iChannelNames: 0x00
iTerminal: 0x00
===>Audio Control Feature Unit Descriptor<===
bLength: 0x0D
bDescriptorType: 0x24
bDescriptorSubtype: 0x06
bUnitID: 0x02
bSourceID: 0x01
bControlSize: 0x02
bmaControls[0]: 01 00
bmaControls[1]: 02 00
bmaControls[2]: 02 00
iFeature: 0x00
===>Audio Control Output Terminal Descriptor<===
bLength: 0x09
bDescriptorType: 0x24
bDescriptorSubtype: 0x03
bTerminalID: 0x03
wTerminalType: 0x0101 (USB streaming)
bAssocTerminal: 0x00
bSourceID: 0x02
iTerminal: 0x00
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x03
bAlternateSetting: 0x00
bNumEndpoints: 0x00
bInterfaceClass: 0x01 -> Audio Interface Class
bInterfaceSubClass: 0x02 -> Audio Streaming Interface SubClass
bInterfaceProtocol: 0x00
iInterface: 0x00
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x03
bAlternateSetting: 0x01
bNumEndpoints: 0x01
bInterfaceClass: 0x01 -> Audio Interface Class
bInterfaceSubClass: 0x02 -> Audio Streaming Interface SubClass
bInterfaceProtocol: 0x00
iInterface: 0x00
===>Audio Streaming Class Specific Interface Descriptor<===
bLength: 0x07
bDescriptorType: 0x24
bDescriptorSubtype: 0x01
bTerminalLink: 0x03
bDelay: 0x01
wFormatTag: 0x0001 (PCM)
===>Audio Streaming Format Type Descriptor<===
bLength: 0x1D
bDescriptorType: 0x24
bDescriptorSubtype: 0x02
bFormatType: 0x01
bNrChannels: 0x02
bSubframeSize: 0x02
bBitResolution: 0x10
bSamFreqType: 0x07
tSamFreq[1]: 0x001F40 (8000 Hz)
tSamFreq[2]: 0x002B11 (11025 Hz)
tSamFreq[3]: 0x003E80 (16000 Hz)
tSamFreq[4]: 0x005622 (22050 Hz)
tSamFreq[5]: 0x005DC0 (24000 Hz)
tSamFreq[6]: 0x00AC44 (44100 Hz)
tSamFreq[7]: 0x00BB80 (48000 Hz)
===>Endpoint Descriptor<===
bLength: 0x09
bDescriptorType: 0x05
bEndpointAddress: 0x84 -> Direction: IN - EndpointID: 4
bmAttributes: 0x05 -> Isochronous Transfer Type, Synchronization Type = Asynchronous, Usage Type = Data Endpoint
wMaxPacketSize: 0x0192 = 0x192 bytes
wInterval: 0x0004
bSyncAddress: 0x00
===>Audio Streaming Class Specific Audio Data Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x25
bDescriptorSubtype: 0x01
bmAttributes: 0x01
bLockDelayUnits: 0x00
wLockDelay: 0x0192
===>Additional Error Checking<===
PASS: number of uncompressed-frame frame descriptors (2) == number of frame descriptors (2) specified in uncompressed format descriptor(s)
PASS: number of MJPEG frame descriptors (2) == number of frame descriptors (2) specified in MJPEG format descriptor(s)
