Usb 2.0 Bus Interface And Application

The paper is concerned with the design process of The USB2. 0 bus interface mainly. It introduces the developing method and developing process of a suit of The USB2. 0 bus interface system with DMA supported, which is composed with Philips' ISP1581 and ATMEL' s AT89C51. In addition, the paper also gives the material actualization means.the paper introduces the protocol of USB bus and the design of.The USB2. 0 bus interface system which includes four segment, hardware, firmware, device driver and application program.Firstly, the protocol of USB bus is introduced in this thesis.Secondly, the actualization means of hardware segment is introduced. The performance of ISP1581 firstly is described; then the hardware scheme are given in detail; the questions in design are explained, which should be paid attention to. The developing method of DMA is important in this part.Thirdly, the design means of the firmware writing is introduced. The paper shows the idea of program design, the hierarchy, the program design in detail and some codes.Finally, the design means of the driver and the host application program is introduced. It describes the selection of driver tool, structure of WDM driver and developing mean of driver. Furthermore, simply depict the communication method between the driver and application program.