Lucent Technologies USS-720 manual Ioctlresetpipe, 4 I/O Control Codes continued, February

Preliminary User Guide, Rev. 2	USS-720
February 1999	USB Device Driver

4 I/O Control Codes (continued)

4.18 IOCTL_RESET_PIPE

IOCTL_RESET_PIPE clears the halted state of the specified pipe within the USB stack and resets the stalled state of the endpoint on the device. Details regarding parameters and error codes follow.

4.18.1 Parameters

lpInBuffer—Points to a buffer that contains a single byte which specifies one of the following values:

Value	Description
BULK_OUT_PIPE	Bulk Out pipe.
BULK_IN_PIPE	Bulk In pipe.
INTERRUPT_PIPE	Interrupt pipe

nInBufferSize—Specifies the size (in bytes) of the buffer pointed to by lpInBuffer. For this operation, this value should be 1.

lpOutBuffer—Points to an output buffer. Not used with this operation. Set to NULL.

nOutBufferSize—Specifies the size (in bytes) of the buffer pointed to by lpOutBuffer. Not used with this operation. Set to zero.

lpBytesReturned—Points to a DWORD that receives the actual size (in bytes) of the data stored into lpOutBuffer. Not used with this operation.

4.18.2 Notes

None.

4.18.3 Error Codes

ERROR_INVALID_PIPE_INDEX—Specified pipe is invalid for this device instance or invalid for the current alter- nate interface setting.

STATUS_INVALID_PARAMETER—nInBufferSize cannot be zero.

STATUS_INSUFFICIENT_RESOURCES—Not enough memory to allocate a request to reset the pipe on this device instance.

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