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  • Function: HM-MT-USB-010031. The Viator® USB HART Interface provides a flexible PC communication link to HART networks. It is used to commission, service, calibrate, and acquire data from any HART field device or transmitter. The interface is compact and rugged for field use.
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Windows versions

  • Windows 10 for desktop editions (Home, Pro, Enterprise, and Education)
  • Windows 10 Mobile
Therapy I&c USB Devices Driver

Common points of discussion for OEMs who want to build Windows systems with USB Type-C connectors.

USB Type-C connector features

Symmetric and reversible design

  • The connector is symmetric. The cable has a USB Type-C connector on each end allowing the host and function device to use USB Type-C connectors. Here is an image that compares the connectors:
  • The connector is designed to be reversible. Traditional connectors had to be connected the 'right-side-up'. With the reversible design, the connector can be flipped.

Supports all USB device speeds

The connector can support USB devices that are low-speed, full-speed, high-speed, SuperSpeed (including SS+).

Alternate modes

The connector can support alternate modes. The alternate mode feature allows non-USB protocols to run over the USB cable, while simultaneously preserving USB 2.0 and charging functionality. Currently, the most popular alternate modes are DisplayPort/DockPort and MHL.

DisplayPort / DockPort

This alternate mode allows the user to project audio/video to external DisplayPort displays over a USB connector.

MHL

The MHL alternate mode is allows the user to project video/audio to external displays that support MHL.

Billboard error messages

If a user connects a USB Type-C alternate mode device or adapter that is not supported by the attached PC or phone, the device or adapter can expose a Billboard device that contains information about the error condition to help the user troubleshoot issues.

Increased power limits

A system with USB Type-C connectors has higher power limits, it can support up to 5V, 3A, 15W.

In addition, the connector can optionally support the power delivery feature as defined by the USB Power Delivery OEM . If the connector supports power delivery, a USB Type-C system can be a power source provider or a consumer and support up to 100W.

Supports USB dual roles

Peripheral devices can connect to a mobile system with USB Type-C connectors, changing the traditional role of a mobile system from function to host. When the same system is connected to a PC, the system resumes the role of a function and PC becomes the host.

Operating system input into which alternate mode needs to be negotiated, such as DP 2-lane vs. DP 4-lane

No. The operating system (or any Microsoft-provided software component) plays no part in selecting an alternate mode. The decision is made by the driver for the connector, specifically the USB connector manager (UCM) client driver. The driver does so by communicating with the connector's firmware by using hardware interfaces.

Pre-OS charging with Type-C and PD

Enabling pre-OS charging is owned by the OEM. You can choose to not implement USB Power Delivery, and charge at USB Type-C power levels until you boot into the operating system.

Charging the phone when it is a USB host to enable docking scenarios like Continuum

Here are a few things to consider:

  • You must to implement USB Power Delivery, so that power and data roles can be swapped independently.

  • Your dock’s upstream port should be implemented as a Charging UFP, defined in the USB Type-C specification. For details, see section 4.8.4, version 1.1.

  • Your dock should request a DR_Swap if it resolved to a DFP, or a PR_Swap if it resolved to a UFP.

    The initial DFP is the power source, so you must change the data role. The initial UFP is the power sink, so you must change the power role. You can perform those operations in your implementation of these callback functions:

Windows 10 Mobile support of USB billboard devices

Yes, if you connect the phone to a device that supports a USB Billboard, as per the USB Device Class Definition for Billboard Devices specification, the user is notified. Your USB connector manager (UCM) client driver is not required to handle the notification. If your system does not recognize the alternate mode, do not enter the mode.

Support for USB Type-C on earlier versions of Windows

USB Type-C is not supported on versions of Windows prior to Windows 10.

UCSI support on earlier versions of Windows

UCSI is not supported on versions of Windows prior to Windows 10.

How to test an implementation of UCSI

To test your implementation, follow the guidelines given in USB Type-C manual interoperability test procedures. We recommend running USB tests in Windows Hardware Lab Kit (HLK) for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.

Conditions and UI for the different errors

Windows 10 can show a set of USB Type-C error messages to help educate users about the limitations with different combinations of USB Type-C hardware and software. For example, the user might get 'Device is charging slowly' message if the charger connected to the USB Type-C connector is not powerful enough, not compatible with the system, or is connected to a non-charging port. For more information, see Troubleshoot messages for a USB Type-C Windows system.

Connecting a non-PD port to a PD provider and a PD consumer to a system that is not a PD provider

The non-PD port attempts to charge the system by using USB Type-C current levels. For more information, see USB 3.1 and USB Type-C specifications.

Connecting Thunderbolt, SuperMHL, or PCI express to a PC that does not support those capabilities

The alternate mode feature allows non-USB protocols (such as Thunderbolt, SuperMHL) to run over the USB cable, while simultaneously preserving USB 2.0 and charging functionality. If a user connects a USB Type-C alternate mode device or adapter that is not supported by the attached PC or phone running Windows 10, an error condition is detected and a message is shown to the user.

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  • If the device or adapter exposes a Billboard device, the user sees information about the error condition to help the troubleshoot issues. Windows 10 provides an in-box driver for a Billboard device and notifies the user that an error has occurred.
  • The user might see an error notification, 'Try improving the USB connection'. For more information, see Fix USB-C Problems.

For the best results, make sure that the alternate mode device or adapter’s requirements are met by PC or phone or cable.

Support and limitations for MTP over USB Type-C in Windows

Windows 10 for desktop editions supports MTP in the initiator role; Windows 10 Mobile supports MTP in the responder role.

How downstream devices and hubs connect and communicate with USB Connector Manager (UCM)

UCM is its own device stack (see Architecture: USB Type-C design for a Windows system). Windows 10 support for USB Type-C includes the required plumbing to make sure that the different class drivers know how to communicate with the different USB Type-C connectors. In order to get Windows 10 support for USB Type-C, you must plug into the UCM device stack.

USB Type-C MUTT requirements for HLK tests

The Windows HLK for Windows 10 contains tests for USB host and function controllers. To test your system, use a USB C-A adapter. These tests are listed in Windows Hardware Certification Kit Tests for USB.

Therapy I&c USB Devices Driver

Microsoft support for P2P data transfer between the same Windows 10 SKU

This is not a valid connection.

  • You cannot connect two PCs running Windows 10 for desktop editions.
  • You cannot connect two mobile devices running Windows 10 Mobile.

If the user attempts to make such a connection, Windows shows an error message. For more information, see Error messages for a USB Type-C Windows system.

The only valid connection is between a Windows Mobile device and Windows desktop device.

UCM class extension (UcmCx) communication with PMIC or battery driver to get/set charging status

On software-assisted charging platforms, UcmCx communicates with PMIC and the battery subsystem. The client driver may determine the charging levels by communicating with the hardware through hardware interfaces. On hardware-assisted platforms, the embedded controller is responsible for charging. UcmCx takes no part in the process.

HLK support for USB Type-C

In Windows HLK for Windows 10, there are no USB Type-C specific tests. We recommend running USB tests in Windows HLK for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.

Install usb c device

UCSI

USB Type-C Connector System Software Interface (UCSI) Specification describes the capabilities of the USB Type-C Connector System software Interface (UCSI), and explains the registers and data structures, for hardware component designers, system builders, and device driver developers.

Microsoft provides an in-box driver with Windows, UcmUcsi.sys, that implements the features defined by the specification. This driver is intended for systems with embedded controllers.

Test a UCSI implementation running on Windows 10

We recommend running USB tests in Windows HLK for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.

Test a UCMCx client driver on Windows 10

We recommend running USB tests in Windows HLK for Windows 10. These tests are listed in Windows Hardware Certification Kit Tests for USB.

VBus/VConn control and role switch operations handled by the UCM class extension

The UCM class extension might get requests from the operating system to change data or power direction of the connector. When it gets those requests, it invokes client driver's implementation of EVT_UCM_CONNECTOR_SET_DATA_ROLE and EVT_UCM_CONNECTOR_SET_POWER_ROLE callback functions (if the connector implements PD). In the implementation, the client driver is expected control the VBUS and VCONN pins. For more information about those callback functions, see Write a USB Type-C connector driver.

USB has been the norm of wired connectivity for a long time now. We use a lot of USB devices every day, including phones, flash storages, etc. However, some users have reported that Windows sometimes fails to recognize the USB device, and shows an Unknown USB device error.

Here I shall discuss why you may be facing this error, and how you can solve this.

Contents

  • 2 How To Solve Windows 10 Unknown USB Device Error?

Why Am I Seeing This Error?

There can be a variety of reasons why you may be facing this error. Windows registers each device separately and then sets up the port for the appropriate transfer. Hence, there are a lot of layers where things can go wrong.

Here is a list of probable error messages that you may receive when you try to run a USB device.

  • Device Descriptor Request Failed (Windows cannot find the description of the USB device in question.)
  • Port reset failed (There are errors in some software or hardware components, for example, USB port is broken).
  • The device failed enumeration (The USB controller you are using is corrupted or unstable).
  • Set address failed (The USB drive contains bad sectors).
  • Error code 43 (The USB device cannot communicate properly with the computer, as there might be a connection issue).

The reason for this may actually be related to Windows not recognizing the changes made to a port. Sometimes Windows fails to register when a USB device has been plugged in for so long, and when a new device is plugged in, the same configurations fail to work for the new device, and hence you get this error.

How To Solve Windows 10 Unknown USB Device Error?

Now that you have slight information about why you may be facing this error, there are some simple steps that you can follow to try and solve the error.

Solution 1: Unplug And Diagnose

If you are unsure if the problem is related to your USB device or your computer port, you can try running a simple diagnostic test to determine the problem.

Simply, unplug your device, and then plug it into another port on your device. If the device is recognized in the other port, you have a hardware problem in your hand.

Next, if the device is not recognized in the other ports as well, try plugging it into another device if available. This will eliminate the possibility of your USB device being corrupted if the device is recognized correctly on your other device.

Solution 2: Run Hardware And Devices Troubleshooter

Windows has an inbuilt troubleshooter that can help diagnose any potentially fix any issues with your system. You can follow these steps to potentially solve your issue.

  1. Open a Run dialog by pressing Win + R.
  2. Type control panel and hit Enter to launch Control Panel.
  3. Inside Control Panel, change the view to small or large icons depending on your preference if it is previously set to Categories.
  4. Select Troubleshooting.
  5. After that select Configure a device under Hardware and Sound and follow the on-screen instruction.
  6. If any errors are found, click on Apply this fix.

Update: Hardware troubleshooter was removed starting from Windows 10 v1809, so you need to run troubleshooters from the control panel. Go to Control Panel > Troubleshooting > Hardware and Sound.

This is usually a safe place to start if you want to solve an ‘unknown USB device set address failed’ error without any hassles. However, the troubleshooter may fail to find the problem sometimes, and in these cases, you may need to follow the next steps.

Solution 3: Uninstall And Scan For Hardware Changes

If you find the unknown USB device error even after running the troubleshooter, you can try using this solution to solve your error.

  1. Open device manager on your device. Open a Run window by pressing Win + R, type devmgmt.msc and press Enter to launch the window.
  2. Here, locate and expand the Universal Serial Bus controllers by clicking on the small arrow next to it.
  3. Under the list of available devices, locate the device that shows the ‘unknown USB device set address failed’ or ‘unknown USB device port reset failed’ error (you will notice a small yellow triangle next to the icon).
  4. Right-click on the device to reveal the context menu.
  5. Select the Uninstall device from the context menu.
  1. Restart your PC.
  2. Once your device boots up, open Device Manager again.
  3. Click on Action from the top ribbon, and select Scan for hardware changes.
  4. Next, head over to Windows Update, and update your device to the latest version.

This is one of the most popular solutions to this error, as many people have reported that this solved their error with ease.

Solution 4: Change USB Selective Suspend Settings

While many users have benefited from the above solution, some of them still found this error. If you too get this error even after trying the above solutions, try using these steps to solve your unknown USB device error.

Unknown Usb Device Driver Download

  1. Open Control panel from the Run dialog as mentioned before, using either the Run dialog or the desktop icon if available.
  2. Change the view to small or large icons depending on your preference if it is previously set to Categories.
  3. Select Power Options.
  4. Click on Show additional plans.
  5. Click on Change settings that are currently unavailable if the button link is shown to you.
  6. Under your selected plan, click on Change plan settings.
  7. Click on Change advanced power settings. A new Power Options window will open.

Therapy I&c Usb Devices Drivers

  1. Under this window, locate and expand USB settings.
  2. Expand USB selective suspend setting. Disable this in both On battery and Plugged in settings if you are using a mobile device.
  1. Click on Apply and restart your device.

Conclusion

Usb C Devices List

So there you have it. Now you know how to solve the unknown USB device using the four solutions provided above. Tell us in the comments which method helped you solved your issue, and to discuss further the same.





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