Feb 24, 2014 Hi people of windows 8. The device is a logilink usb to serial adapter which uses the prolific chipset. Usb serial driver updates automatically to.
Windows 8 does not support Prolific usb to serial driver what is the solution? We want to use windows 8 but due to this driver problem, we are not buying windows 8 Figure out when the hardware device manufacturer will be providing you with drivers for the hardware you want to use under the OS you want to use. If they are not - then there you go. Wrong answer. These drivers worked flawlessly with Win7, and now they are broken in Win8. Probably some simple switch in the device driver layer, and perhaps it is, indeed, a bug actually in the driver that is now exposed in Win8.but in the meantime I am telling all my customers, who depend on their GPS's functioning, to downgrade to Win7.
Here are the new features and improvements for Universal Serial Bus (USB) in Windows 8.1. Windows Runtime USB API for developing Windows Store apps Windows Runtime provides a new namespace: (see for a brief overview). By using the namespace, you can write a Windows Store app that talks to a custom USB device. For more information, see these topics:. These samples demonstrate the use of the namespace.
Windows Store app sample Description This sample shows how to communicate with a USB device. The sample can communicate with the OSR USB FX2 learning kit and the SuperMUTT device. This sample shows how to communicate with a USB CDC (Communications Device Class) device and sends and receives data through serial ports, such as a USB serial converter cable. This sample shows how a Windows Store app can update the firmware of a USB device. The update operation runs as a background task. Microsoft OS 2.0 descriptors for improved device enumeration Microsoft OS 2.0 descriptors improve device identification and driver installation experience.
MS OS 2.0 descriptors specification provides these improvements:. Defines a new BOS device capability descriptor to allow devices to return platform-specific properties. The BOS descriptor is a standard descriptor defined by the standard USB specification for USB versions 2.1 and greater, so retrieval is a normal and an expected enumeration step that should not lead to unintended device behavior.
Allows descriptors to be scoped to an entire device, a specific configuration, or a function. Allows devices to return multiple descriptor sets where each set applies to a specific range of Windows version. This enables devices to enumerate differently depending on the version of Windows on the system to which it is attached.
Faster Resume: Device can identify its resume time, which reduces time from suspend state. For information about the specification, see. Isochronous support for WinUSB The Microsoft-provided WinUSB (kernel-mode driver) now supports transfers to and from isochronous endpoints of a USB device The user-mode DLL, Winusb.dll, exposes these that a Windows desktop app can use to initiate such transfers. USB driver stack improvements In Windows 8.1, the performance and reliability of both USB 3.0 and 2.0 driver stacks have been improved. For newer platforms that support InstantGo, the overall system power consumption in S0 can be extremely low. For such a system, even the few milliwatts that a USB device consumes while in selective suspend, starts to matter.
With the goal of optimizing power for the new systems, we have implemented D3cold for USB 2.0 stack and Usbccgp.sys and improved Windows 8 implementation of USB 3.0 driver stack. Better power management when no driver is installed. The USB driver stack now suspend a USB port that causes the hub to suspend if it's the only device connected to the controller. DPC performance has been improved to avoid watchdog timeout crashes. Devices can now recover faster than the default 10 millisecond specified in the USB 2.0 specification. Also, the host controller driver asserts resume signaling for less than the 20 milliseconds required in the USB 2.0 specification.
USB 3.0 driver stack is now more reliable when performing control, bulk, and isochronous data transfers. USB tests in the Hardware Certification Kit (HCK). These USB tests in the Hardware Certification Kit (HCK) have been improved. The device enumeration tests now have a new parameter that reduces manual intervention during testing using simplified topologies. The suspend tests have been improved logging capabilities.
MUTT and SuperMUTT devices are now USB-IF compliance devices. The devices and the accompanying software package are integrated in to the HCK suite of USB tests. They provide automated testing that can be used during the development cycle of USB controllers, devices and systems, especially stress testing.
MUTT hardware can be purchased from. The device does not have installed firmware installed. To install firmware, download the MUTT software package from and run MUTTUtil.exe. For more information, see the documentation included with the package.
Improved USB diagnostic tools and debugger extensions. Kernel debugging extensions for USB 2.0 and 3.0 (USBKD.dll and USB3KD.dll) have been improved to have similar command pattern. Debugger extension for Usbccgp.sys is now available. USB events shown in the Message Analyzer (Netmon) are now more descriptive. The events can also be grouped and sorted by controller, hub, and so on. Related topics.
