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With the help of vendor class decoder you can write your own custom device class decoders, for your devices which belong to the vendor specific USB device class (Class Code: 0xFF).
- The ACITS LPR Remote Printing Client Utility provides a TCP/IP print monitor port driver for seamless Windows 95/98/Me and NT 4.0 network printing. This port driver can be used on Windows 95/98/Me and NT 4.0 to direct print jobs from Windows 95/98/Me and NT 4.0 to any printer or printer server that utlizes the LPR/LPD protocol.
- With the help of vendor class decoder you can write your own custom device class decoders, for your devices which belong to the vendor specific USB device class (Class Code: 0xFF).
- Resolve PC Issues with Driver Updater. Unstable PC performance is often caused by outdated or corrupt drivers. Auslogics Driver Updater diagnoses driver issues and lets you update old drivers all at once or one at a time to get your PC running smoother.
Refer Sample Code for writing your own vendor decoder DLL. The output DLL (named vsdecoder.dll) should be copied to USBTrace installation directory.
How to write your custom device class decoder DLL ?
The custom device class decoder which you should write is a Windows DLL which has the following 2 exported functions implemented:
You can modify this sample to implement your own device class decoder.
GetReqName
In this function, you will have to return the name of the given request (Ex: 'SetPortDetails'). The request name must be filled in the sReqName parameter. Request details such as bmRequestType, bRequest, wValue, wIndex are as per the USB specification (Setup Packet, 8 Bytes). Request data and length of the data (pData, nDataLen) are also given. reqNameLen specifies the length of sReqName buffer.
The request name which you provide will be displayed in the Log view (USBTrace captured data list).
GetReqInfo
In this function, you will have to return the detailed request information.
The detailed request information must be filled in sInfoString parameter in the following format:
Example: 'VENDOR_SEND_COMMAND;Command Code=0x21;Control=CT_NONE'
This will be displayed in the additional information view.
pInfoStringLen points to the length of sInfoString. If the given pInfoStringLen is insufficient, you must fail this function providing the required length in the same variable.
Handling Bulk, Interrupt, Isochronous packets
Drivers Sysnucleus Printers Epson
In addition to control packets, you can also decode bulk, interrupt and isochronous packets from your own custom vendor specific class decoder.
The bmRequestType parameter can take the following values for these transfer types: TRANSFER_TYPE_BULKORINTERRUPT, TRANSFER_TYPE_ISOCH
#define TRANSFER_TYPE_ISOCH 0xFE
The wValue parameter will contain the endpoint address if bmRequestType equals any one of the above 2 values. pData will contain the transfer buffer and nDataLen will contain the buffer length.
Drivers For Printers
How to install ?
Drivers Sysnucleus Printers Wireless
The name of the DLL should be vsdecoder.dll. This DLL should be copied to USBTrace installation directory. For more information, we recommend you to refer the sample DLL source code.