各位路过的大侠帮帮忙，关于端点没有中断的问题

各位大侠，真是感谢您能抽出时间看一看这个问题。
目前我正在用net2272 usb控制芯片，遇到一个问题，困扰很久了，不知道该从什么地方着手解决。
主机发送bulk in 或者bulk out传输的请求，对应的端点分别为端点A和端点B，可是，查看状态寄存器，并没有中断的标志。然后我用usbsniffer工具来抓包，可以看到主机已经发送出了请求。抓的包如下：
[0 ms] UsbSnoop compiled on Jan 18 2003 22:41:32 loading
[0 ms] UsbSnoop - DriverEntry(f8839c40) : Windows NT WDM version 1.32
[0 ms] UsbSnoop - AddDevice(f8839f50) : DriverObject 81afe748, pdo 81adc878
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_PNP (0x00000018)
[1 ms] UsbSnoop - MyDispatchPNP(f8839ee0) : IRP_MJ_PNP (0x00000018)
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_PNP (IRP_MN_QUERY_RESOURCE_REQUIREMENTS)
[1 ms] UsbSnoop - MyDispatchPNP(f8839ee0) : IRP_MJ_PNP (IRP_MN_QUERY_RESOURCE_REQUIREMENTS)
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_PNP (IRP_MN_FILTER_RESOURCE_REQUIREMENTS)
[1 ms] UsbSnoop - MyDispatchPNP(f8839ee0) : IRP_MJ_PNP (IRP_MN_FILTER_RESOURCE_REQUIREMENTS)
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_PNP (IRP_MN_START_DEVICE)
[1 ms] UsbSnoop - MyDispatchPNP(f8839ee0) : IRP_MJ_PNP (IRP_MN_START_DEVICE)
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[1 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81b10008, IRQL=0
[1 ms]  >>>  URB 1 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000012
  TransferBuffer       = 81b0d764
  TransferBufferMDL    = 00000000
  Index                = 00000000
  DescriptorType       = 00000001 (USB_DEVICE_DESCRIPTOR_TYPE)
  LanguageId           = 00000000
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_SYSTEM_CONTROL
[1 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81b10008, Context=81fe0c80, IRQL=2
[1 ms]  <<<  URB 1 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = f88ea9cb (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000012
  TransferBuffer       = 81b0d764
  TransferBufferMDL    = 81ca8f88
    00000000: 12 01 00 02 ff 00 00 40 25 05 00 10 00 01 01 02
    00000010: 00 01
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 00 01 00 00 12 00
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[1 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81b10008, IRQL=0
[1 ms]  >>>  URB 2 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000009
  TransferBuffer       = f88ea9bc
  TransferBufferMDL    = 00000000
  Index                = 00000000
  DescriptorType       = 00000002 (USB_CONFIGURATION_DESCRIPTOR_TYPE)
  LanguageId           = 00000000
[1 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81b10008, Context=820cbe68, IRQL=2
[1 ms]  <<<  URB 2 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = f88ea9cb (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000009
  TransferBuffer       = f88ea9bc
  TransferBufferMDL    = 81ca8f88
    00000000: 09 02 20 00 01 01 00 e0 00
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 00 02 00 00 09 00
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[1 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81b10008, IRQL=0
[1 ms]  >>>  URB 3 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000020
  TransferBuffer       = 81b86b70
  TransferBufferMDL    = 00000000
  Index                = 00000000
  DescriptorType       = 00000002 (USB_CONFIGURATION_DESCRIPTOR_TYPE)
  LanguageId           = 00000000
[1 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81b10008, Context=81d109f8, IRQL=2
[1 ms]  <<<  URB 3 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = f88ea9cb (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000020
  TransferBuffer       = 81b86b70
  TransferBufferMDL    = 81ca8f88
    00000000: 09 02 20 00 01 01 00 e0 00 09 04 00 00 02 ff 00
    00000010: 00 00 07 05 81 02 00 02 00 07 05 01 02 00 02 00
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 00 02 00 00 20 00
[1 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[1 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81b10008, IRQL=0
[1 ms]  >>>  URB 4 going down  >>>
-- URB_FUNCTION_SELECT_CONFIGURATION:
  ConfigurationDescriptor = 0x81b86b70 (configure)
  ConfigurationDescriptor : bLength             = 9
  ConfigurationDescriptor : bDescriptorType     = 0x00000002
  ConfigurationDescriptor : wTotalLength        = 0x00000020
  ConfigurationDescriptor : bNumInterfaces      = 0x00000001
  ConfigurationDescriptor : bConfigurationValue = 0x00000001
  ConfigurationDescriptor : iConfiguration      = 0x00000000
  ConfigurationDescriptor : bmAttributes        = 0x000000e0
  ConfigurationDescriptor : MaxPower            = 0x00000000
  ConfigurationHandle     = 0x00000000
  Interface[0]: Length            = 56
  Interface[0]: InterfaceNumber   = 0
  Interface[0]: AlternateSetting  = 0
[59 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81b10008, Context=81bc01c0, IRQL=0
[59 ms]  <<<  URB 4 coming back  <<<
-- URB_FUNCTION_SELECT_CONFIGURATION:
  ConfigurationDescriptor = 0x81b86b70 (configure)
  ConfigurationDescriptor : bLength             = 9
  ConfigurationDescriptor : bDescriptorType     = 0x00000002
  ConfigurationDescriptor : wTotalLength        = 0x00000020
  ConfigurationDescriptor : bNumInterfaces      = 0x00000001
  ConfigurationDescriptor : bConfigurationValue = 0x00000001
  ConfigurationDescriptor : iConfiguration      = 0x00000000
  ConfigurationDescriptor : bmAttributes        = 0x000000e0
  ConfigurationDescriptor : MaxPower            = 0x00000000
  ConfigurationHandle     = 0x81c486d0
  Interface[0]: Length            = 56
  Interface[0]: InterfaceNumber   = 0
  Interface[0]: AlternateSetting  = 0
  Interface[0]: Class             = 0x000000ff
  Interface[0]: SubClass          = 0x00000000
  Interface[0]: Protocol          = 0x00000000
  Interface[0]: InterfaceHandle   = 0x81d218b8
  Interface[0]: NumberOfPipes     = 2
  Interface[0]: Pipes[0] : MaximumPacketSize = 0x00000200
  Interface[0]: Pipes[0] : EndpointAddress   = 0x00000081
  Interface[0]: Pipes[0] : Interval          = 0x00000000
  Interface[0]: Pipes[0] : PipeType          = 0x00000002 (UsbdPipeTypeBulk)
  Interface[0]: Pipes[0] : PipeHandle        = 0x81d218d4
  Interface[0]: Pipes[0] : MaxTransferSize   = 0x00004000
  Interface[0]: Pipes[0] : PipeFlags         = 0x00000000
  Interface[0]: Pipes[1] : MaximumPacketSize = 0x00000200
  Interface[0]: Pipes[1] : EndpointAddress   = 0x00000001
  Interface[0]: Pipes[1] : Interval          = 0x00000000
  Interface[0]: Pipes[1] : PipeType          = 0x00000002 (UsbdPipeTypeBulk)
  Interface[0]: Pipes[1] : PipeHandle        = 0x81d218f4
  Interface[0]: Pipes[1] : MaxTransferSize   = 0x00004000
  Interface[0]: Pipes[1] : PipeFlags         = 0x00000000
[60 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_PNP (IRP_MN_QUERY_CAPABILITIES)
[60 ms] UsbSnoop - MyDispatchPNP(f8839ee0) : IRP_MJ_PNP (IRP_MN_QUERY_CAPABILITIES)
[60 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_PNP (IRP_MN_QUERY_PNP_DEVICE_STATE)
[60 ms] UsbSnoop - MyDispatchPNP(f8839ee0) : IRP_MJ_PNP (IRP_MN_QUERY_PNP_DEVICE_STATE)
[60 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_PNP (IRP_MN_QUERY_DEVICE_RELATIONS)
[60 ms] UsbSnoop - MyDispatchPNP(f8839ee0) : IRP_MJ_PNP (IRP_MN_QUERY_DEVICE_RELATIONS)
[115893 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[115893 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81cb6500, IRQL=0
[115893 ms]  >>>  URB 5 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000012
  TransferBuffer       = 81d20e38
  TransferBufferMDL    = 00000000
  Index                = 00000000
  DescriptorType       = 00000001 (USB_DEVICE_DESCRIPTOR_TYPE)
  LanguageId           = 00000000
[115893 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81cb6500, Context=81daf9e0, IRQL=2
[115893 ms]  <<<  URB 5 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = 0000000b (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000012
  TransferBuffer       = 81d20e38
  TransferBufferMDL    = 81c170d0
    00000000: 12 01 00 02 ff 00 00 40 25 05 00 10 00 01 01 02
    00000010: 00 01
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 00 01 00 00 12 00
[115893 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[115893 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81cb6500, IRQL=0
[115893 ms]  >>>  URB 6 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000009
  TransferBuffer       = 81db7bb8
  TransferBufferMDL    = 00000000
  Index                = 00000000
  DescriptorType       = 00000002 (USB_CONFIGURATION_DESCRIPTOR_TYPE)
  LanguageId           = 00000000
[115893 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81cb6500, Context=81bbb168, IRQL=2
[115893 ms]  <<<  URB 6 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = 0000000b (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000009
  TransferBuffer       = 81db7bb8
  TransferBufferMDL    = 81c170d0
    00000000: 09 02 20 00 01 01 00 e0 00
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 00 02 00 00 09 00
[115893 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[115893 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81cb6500, IRQL=0
[115893 ms]  >>>  URB 7 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000020
  TransferBuffer       = 81f5d098
  TransferBufferMDL    = 00000000
  Index                = 00000000
  DescriptorType       = 00000002 (USB_CONFIGURATION_DESCRIPTOR_TYPE)
  LanguageId           = 00000000
[115893 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81cb6500, Context=81d20e38, IRQL=2
[115893 ms]  <<<  URB 7 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = 0000000b (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000020
  TransferBuffer       = 81f5d098
  TransferBufferMDL    = 81c170d0
    00000000: 09 02 20 00 01 01 00 e0 00 09 04 00 00 02 ff 00
    00000010: 00 00 07 05 81 02 00 02 00 07 05 01 02 00 02 00
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 00 02 00 00 20 00
[115893 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[115893 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81cb6500, IRQL=0
[115893 ms]  >>>  URB 8 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000100
  TransferBuffer       = 81af3278
  TransferBufferMDL    = 00000000
  Index                = 00000001
  DescriptorType       = 00000003 (USB_STRING_DESCRIPTOR_TYPE)
  LanguageId           = 00000409
[115893 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81cb6500, Context=81d57da0, IRQL=2
[115893 ms]  <<<  URB 8 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = 0000000b (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000000
  TransferBuffer       = 81af3278
  TransferBufferMDL    = 81c170d0
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 01 03 09 04 00 01
[115893 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[115893 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81cb6500, IRQL=0
[115893 ms]  >>>  URB 9 going down  >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
  TransferBufferLength = 00000100
  TransferBuffer       = 81b5b680
  TransferBufferMDL    = 00000000
  Index                = 00000002
  DescriptorType       = 00000003 (USB_STRING_DESCRIPTOR_TYPE)
  LanguageId           = 00000409
[115893 ms] UsbSnoop - MyInternalIOCTLCompletion(f8838db0) : fido=00000000, Irp=81cb6500, Context=81ee8618, IRQL=2
[115893 ms]  <<<  URB 9 coming back  <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
  PipeHandle           = 81d51f80
  TransferFlags        = 0000000b (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000000
  TransferBuffer       = 81b5b680
  TransferBufferMDL    = 81c170d0
  UrbLink              = 00000000
  SetupPacket          =
    00000000: 80 06 02 03 09 04 00 01
[125461 ms] UsbSnoop - DispatchAny(f8837610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[125461 ms] UsbSnoop - MyDispatchInternalIOCTL(f8838e80) : fdo=81adc878, Irp=81c75bf0, IRQL=2
[125461 ms]  >>>  URB 10 going down  >>>
-- URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER:
  PipeHandle           = 81d218d4 [endpoint 0x00000081]
  TransferFlags        = 00000003 (USBD_TRANSFER_DIRECTION_IN, USBD_SHORT_TRANSFER_OK)
  TransferBufferLength = 00000200
  TransferBuffer       = 00000000
  TransferBufferMDL    = 81bb3340
  UrbLink              = 00000000

还请各位大侠不吝赐教 ，谢谢了

自己先顶一下