Download USB Complete: The Developer's Guide (Complete Guides series) by Jan Axelson PDF
By Jan Axelson
This up-to-date variation of the best-selling developer's advisor to the common Serial Bus (USB) interface covers all features of venture improvement, together with layout, machine firmware, and host software software.
Topics contain how one can decide on a tool controller chip, tips on how to write gadget firmware for USB communications, how you can reduce improvement time through the use of USB gadget periods, and the way to put in writing software program to entry units that practice vendor-specific capabilities. additionally mentioned are interfacing, utilizing bus energy, instant applied sciences, and USB On-The-Go.
The e-book offers instance code for gaining access to USB units utilizing visible uncomplicated .NET and visible C# .NET. the instance code indicates the right way to realize machine arrival and elimination and the way to move vendor-defined info utilizing the human interface equipment category and Microsoft’s WinUSB driving force. additionally coated is tips to write machine firmware to speak with the USB host.
The Fourth version covers USB 3.0 and SuperSpeed and has new details on controller chips, USB sessions, energy use, and Microsoft’s WinUSB driver.
The author’s web site has software code, articles, and different details of curiosity to USB builders. (<U>www.Lvr.com</U>)
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Extra resources for USB Complete: The Developer's Guide (Complete Guides series)
Example text
During enumeration, a device’s driver requests bandwidth for transfers that must have guaranteed timing. If the bandwidth isn’t available, the driver can request a smaller portion of the bandwidth or wait until the requested bandwidth is available. Transfers that have no guaranteed timing use the remaining bandwidth and must wait if the bus is busy. 'TTQT %JGEMKPI When transferring data, the host adds error-checking bits. On receiving data, the device performs calculations on the data and compares the result with received error-checking bits.
6QQNU HQT &GXGNQRKPI To develop a USB device, you need the following tools: • An assembler or compiler to create the device firmware (the code that runs inside the device’s controller chip). • Device-programmer hardware that enables storing the assembled or compiled code in the controller’s program memory. • A compiler for writing and debugging host software, which may include a combination of a device driver, filter driver, and application code. Also recommended are a monitor program for debugging the device firmware and a protocol analyzer for viewing USB traffic.
The USB-IF releases revisions and additions to the USB specification via Engineering Change Notices (ECNs). 0 specification. 0 device-controller hardware expected to follow about a year later. 0 sometime after the release of Windows 7, the successor to Windows Vista. 0 defines a new dual-bus architecture with two physical buses that operate in parallel. 0 traffic and additional wires to support the new SuperSpeed bus at 5 Gbps. 0’s high speed. 0, SuperSpeed has a pair of wires for each direction and can transfer data in both directions at the same time.