USB2.0中管道与数据传输类型详解

Detailed Explanation of the USB2.0Pipe and Transfer Typres

通用串行总线(USB-UniversalSerialBus)2.0规范的数据流模型主要阐述数据在USB总线上传输的机理。管道(Pipe)代表数据缓冲区与端点之间传输数据的能力。USB支持控制传输、同步传输、块传输、中断传输四种数据传输类型。详细了解每一种传输类型的特性对于正确地使用USB总线是非常必要的。

The data flow model of the Universal Serial Bus2.0specification mainly illustrates how data is moved across the USB.The pipe reflects the ability of transferring data between data buffer and end points.The USB defines four transfer types:Control Transfers?Isochronous Transfers?Interrupt Transfers and Bulk Transfers.It is important for correctly using the USB to understand detailed characteristics of every transfer type.