Usblyzer

USB Analysis Features of USBlyzer USBlyzer is a featured software-based USB analysis tool that enables you to view USB device descriptors, capture and analyze USB devices activity in real time, save captured data for later protocol analysis. USBlyzer not only shows you a raw hex dump of the data that was sent to or received from a USB device. USBlyzer looks at that data and decodes it into human readable form. This feature greatly speeds up usb analysis efforts. Simple to use, this USB analysis software is the ideal companion for anyone who is developing USB device drivers and software. Explore USB Tree, Capture USB Drivers Activity, Analyze USB Devices Traffic The following are the key USB analysis features of USBlyzer: Completely customizable interface with docked windows and user-defined screen sets. Exploring USB Device Tree The USB device tree explorer visualizes USB tree topology. You can browse and explore all connected USB devices (including host controllers and hubs) and view the additional information about them. Display all plugged USB devices in a hierarchical auto-refreshed tree-view. View and explore the USB Devices and their components. View detailed USB-related information about each USB device: Device Descriptor, Configuration, Interfaces, Endpoints, etc. Verify the general compliance of all standard USB descriptors with the USB Specification. Click to see all supported USB descriptors View detailed PnP-related information about each USB device: Hardware IDs, Instance ID, Software Key, PDO Name, etc. Capturing IRPs, URBs and IOCTLs The real-time capture feature allows you to intercept the IRPs, URBs, IOCTLs and data transferred through any USB device stack. Real-Time monitoring at any level in the USB driver stack from USB Host Controller to target USB Device. Capture several USB devices simultaneously. Separate log records for request issue and completion. Capture almost all types of USB Request Block (URB). Click to see all supported URB function's values Capture almost all types of USB-related kernel-mode device I/O control requests. Click to see all supported kernel-mode device I/O control code's values Capture almost all types of user-mode device I/O control requests to USB Host Controller and USB Hub. Click to see

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Home / Documentation / Troubleshooting / USB data trace One of the trickiest support issues to identify is where the driver and system appear to be correctly configured but the touch does not work as expected.To aid this type of investigation we have incorporated diagnostic and debug functions in the driver and these may indicate that the issue is with the hardware interface, such that the captured debug log may show a USB error has occurred, as per this example mid data read:2018/06/29-21:37:21: DBG: Read 56 bytes for VID 0x222a PID 0x11e EP 0x822018/06/29-21:37:21: DBG: Read 56 bytes for VID 0x222a PID 0x11e EP 0x822018/06/29-21:37:21: DBG: Read 56 bytes for VID 0x222a PID 0x11e EP 0x822018/06/29-21:37:21: ***: USB: (LIBUSB_TRANSFER_ERROR)2018/06/29-21:37:21: ***: USB: (LIBUSB_TRANSFER_ERROR closing device)When investigating USB hardware issues it can sometimes be helpful to have a USB trace to see USB interchange between the driver / system and the device that may help identify why the error is occurring.In house we have a USB hardware analyser that can be physically connected to the USB port and monitor USB traffic. Being external this is independent of the OS in use.Where a hardware analyzer is not available (most cases!) it is possible to use a software USB trace tool to capture USB dialog.Windows does have a very good 3rd party software USB analyzer call usblyzer and this can be quite useful even when trying to identify USB issues in non-Windows systems.The following is a simple guide how to take a usblyzer trace... Download and install usblyzer, preferably 64 bit as all our systems are 64 bit and to view trace logs they need to be created on compatible systems. If using an external touch screen that can be plugged into a USB port the run usblyzer and select 'Capture Hot-plugged': Now plug in the device or, if using an internal USB device, find and select the device in the device tree. In this example a touch screen cable from a Dell P2314T monitor has been plugged in and automatically selected: Start capture and touch the screen: Stop and save capture and email .ulz log file: Share Article

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