RxUsbQueryDeviceInfo

Description

Obtains attachment information about a specific USB device.

Syntax

For access by Device Handle use:

rc = RxUsbQueryDeviceInfo(Handle,Info)

For access by Device Number use:

rc = RxUsbQueryDeviceInfo(Number,Info)

Parameters

Handle

the Device Handle received from the previous RxUsbOpen.

Number

the Device Number from 1 up to the Total Number from RxUsbQueryNumberDevices.

Info

receives USB device attachment information as hexadecimal string.

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

/* add RxUsbQueryDeviceInfo */
rc = RxFuncAdd('RxUsbQueryDeviceInfo','usbcalls','RxUsbQueryDeviceInfo')
say '+RxUsbQueryDeviceInfo(),RC=0x'd2x(rc)

/* invoke RxUsbQueryDeviceInfo */
drop Info /* receives device information */
rc = RxUsbQueryDeviceInfo(Handle,Info)
say '*RxUsbQueryDeviceInfo(),RC=0x'd2x(rc)

/* drop RxUsbQueryDeviceInfo */
rc = RxFuncDrop('RxUsbQueryDeviceInfo')
say '-RxUsbQueryDeviceInfo(),RC=0x'd2x(rc)

Related Functions

• RxUsbQueryDeviceReport
• RxUsbQueryNumberDevices
• RxUsbOpen