| USB has been widely used in various kinds of data transferring equipment in recentyears. With a high data transfer speed, it is convenient, cheap and easy to handle. USBinterface technology provides a wonderful solution for the data transmission between PCand other equipments.The paper is described in five parts. First part briefly introduces the history of USBinterface, and the characteristic of USB. Second part introduces USB physics architecture,USB logic architecture, data transfer type, USB communication protocol and theapplication in embedded systems. Then the third part studies the design of the hardwarecircuit, mainly about the USB interface and microcomputer. The fourth part emphasize onthe design of firmware program, introduces the goal of firmware design, the workprincipium of firmware, and the makeup and design of firmware. Finally, the fifth partdeals with how to write a WDM driver and how to develop application, and achieves datatransfer and voice recording and playing. |
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