TAILIEUCHUNG - USB Complete fourth- P20

USB Complete fourth- P20:This book focuses on Windows programming for PCs, but other computers and operating systems also have USB support, including Linux and Apple Computer’s Macintosh. Some real-time kernels also support USB. | Chapter 7 Table 7-2 Windows provides drivers for many classes. Class Windows Edition s when Class Driver Was Added Audio Windows 98 Gold audio Windows Me MIDI Windows XP MIDI improved Communications Windows 98 SE modem Windows 2000 Remote NDIS Content Security Windows XP devices with CSM-1 interfaces can provide a serial number Device Firmware Upgrade No support Human Interface Windows 98 Gold HID Windows 98SE HID IrDA Bridge No support Mass Storage Windows 2000 class driver Windows 2000 XP3 support for multiple LUNs Personal healthcare No support Printer Windows 2000 class driver Smart Card Windows 2000 update class driver Still Image Windows 98SE class driver first phase preliminary Windows 2000 class driver improved Test and Measurement No support Video Windows 98 Gold USB camera minidriver library USBCAMD not supported under Windows 2000 Windows Me USB camera minidriver library USBCAMD Windows XP SP2 class driver audio device can t use an audio host driver. Version adds full support for high speed mandatory use of the interface association descriptor and new capabilities and controls. Documentation The audio specification consists of the main class specification and supporting documents for audio data formats terminal types and MIDI devices. The MIDI standard is available from the MIDI Manufacturers Association at . 166 Device Classes Overview Each audio function in a device has an Audio Interface Collection that consists of one or more interfaces. The interfaces include one AudioControl AC interface zero or more AudioStreaming AS interfaces and zero or more MIDIStreaming MS interfaces Figure 7-1 . In other words every Audio Interface Collection has an AudioControl interface while AudioStreaming and MIDIStreaming interfaces are optional. In audio devices an interface association descriptor IAD specifies the interfaces that belong to a collection. In audio devices a class-specific AC interface header descriptor

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