| USB interface is a bus interface standard. It has very high transfer rate, plug and play and compatibility virtue, and has been widely applied data transmission and image acquisition. Aimed at the data exchange issue between computer and the testing apparatus which are developed in the laboratory, it puts forward USB2.0 data transmission interface, Which breaks through the slow data transmission speed, and has the advantages of hot-plugged and portable.The following four aspects of the research were proposed:First, characteristics of store testing system interface are studied and researched, then synthesize and compare the advantages and disadvantages of the kinds of the bus. It introduces USB technology and characteristic.Second, based on the subject and object, USB2.0 chip Cy7c68013 was applied to realize the high speed download. Meanwhile the design of data transfer interface of USB2.0 was confirmed. This design can be used in USB2.0 interface, the design the power supply management circuit, the code storage circuit, the electric cooperation between them are studied in detail, plot PCB plate.Third, it expatiates the design of software and firmware for USB interface, and builds the firmware structure. Also, the dynamic link base was written combined the application which owns a stable performance and can be used in various systems. At the same time it studies the General Purpose Driver and computer application, and writes the speed test program.Fourth, the article introduces the testing project, then discusses and analyzes the data transfer speed of the USB interface. The notices of the operation are introduced.Testing and application shows that the USB interface tallies with the USB protocol. It has good data transfer ability and can meet the requirements of store testing system and the computer data transfer. It has successfully used in kinds of testing apparatus such as oil well P-t test gauge and electronic gauge, data transmission rate is validated to be up to 72Mbps. |
