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There are four data transfer types defined in USB(USB中有4种数据传输类型). Each type is optimized to match the service requirements between the client software... 阅读全文
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The Host Controller (HC) contains a set of on-chip operational registers which are mapped into a noncacheable portion of the system addressable space.... 阅读全文
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相关资源连接:USB官网:http://www.usb.org/home《USB in a NutShell》:http://www.beyondlogic.org/usbnutshell/usb1.shtmlWiki:https://en.wikipedia.org/wiki/USB《A Seri... 阅读全文
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USB has four different packet types. Token packets indicate the type of transaction to follow, data packets contain the payload, handshake packets are... 阅读全文
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1.2. The Java "White Paper" BuzzwordsThe authors of Java have written an influential White Paper that explains their design goals and accomplishments.... 阅读全文
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5.1. Classes, Superclasses, and SubclassesLet's return to the Employee class that we discussed in the previous chapter. Suppose (alas) you work for a ... 阅读全文
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Activity LifecycleActivities in the system are managed as an activity stack(activity栈?). When a new activity is started, it is placed on the top of th... 阅读全文