UsbQueryDeviceInfo

Description
Obtains attachment information about a specific USB device.

Syntax
For access by Device Handle use: ulrc = UsbQueryDeviceInfo(Handle,pulBufLen,pucData) For access by Device Number use: ulrc=UsbQueryDeviceInfo(ulDevNumber,pulBufLen,pucData)

Parameters

 * Handle : the Device Handle received from the previous UsbOpen.


 * ulDevNumber : the Device Number from 1 up to the Total Number from UsbQueryNumberDevices.


 * pulBufLen : the address of the variable containing the buffer length. Must be set to 12.


 * pucData : the address of the buffer to receive the Attachment Information.

Return Code
0x0000 - NO_ERROR

Errors
0x0057 - ERROR_INVALID_PARAMETER 0x1B58 - USB_NOT_INIT 0xFF13 - ERROR_I24_INVALID_PARAMETER 0xFF1F - ERROR_GEN_FAILURE 0xFF37 - ERROR_DEV_NOT_EXIST 0xFF57 - ERROR_INVALID_PARAMETER

Remarks
The Attachment Information consists of the following:


 * UCHAR ctrlID - controller identifier.
 * UCHAR deviceAddres - USB device address.
 * UCHAR bConfigurationValue - current USB device Configuration Value.
 * UCHAR bInterfaceNumber - current index in interface array for this item.
 * UCHAR lowSpeedDevice - 0 is full speed, 2 is high speed, else low speed.
 * UCHAR portNum - port number to which the USB device is attached.
 * USHORT parentHubIndex - index in hub table to parent hub.
 * HDEVICE rmDevHandle - Resource Manager device handle.

Example Code
//Code Snippet - UsbQueryDeviceInfo { APIRET ulrc; PUCHAR pucInfo; PULONG pulBufLen; UCHAR ucInfo[12]; ULONG ulBufLen = sizeof(ucInfo); ULONG ulDevNumber = ulNumDev;

pucInfo = &ucInfo[0]; pulBufLen = &ulBufLen; ulrc = UsbQueryDeviceInfo(ulDevNumber,pulBufLen,pucInfo); printf("\nUsbQueryDeviceInfo - ulrc: 0x%04X (%hu)",ulrc,ulrc); if (!ulrc) //success {   int i; printf(" - DeviceInfo:\n"); for (i=0;i<ulBufLen;i++) printf("%02X",ucInfo[i]); } }

Related Functions

 * UsbQueryDeviceReport
 * UsbQueryNumberDevices
 * UsbOpen