Communicating In USB Network Based On The Embedded Application

USB (Universal Serial Bus , common serial bus ), it support use simultaneously PnP ' Plug and Play), and the hot to if pulling out, insert,is it kinds of adaptation the low, in, bus will be hung to PCs of apparatus high-speed, can reach 127 peripheral hardware link system of user at the same time. Because USB have fast, apparatus install , dispose convenient easy to expand, bus supply power , transmit mode to be flexible in usage with the low grade advantage of the cost of goods, widely applied to various computer apparatus, become major interface of the PC and outside communication ownly at present. Purpose of research this to familiar with system of USB build up and master USB develop technology. Through the study on USB agreement and relevant technology, it is simple to realize one finally, but the development of USB apparatus with intact structure. Connect the checkout equipment of outside with PC in order to reach with USB interface , the purpose to carry on data transmission. The hardware has adopted S3C44B0 microprocessor based on ARM7 kernel as the hardware core of platform in this thesis, PDIUSBD12 chip, as USB controller, complements it with Flash, peripheral memory components such as Sdram ,etc, form a minimum system, put up the experiment platform of the hardware.This text has explained the definition ,characteristic , classification and development of the embedded system in the software, and has done the introduction to more typical embedded operating system at present. To development environment, compile alternately and Linux system transplantation of platform carry on deep researching and analysing in ARM, have set up a integrated development environment based on uCLinux on the basis of studying. Unite adjust , in software and hardware in system, finish hardware circuit separately, firmware procedure, the module of the application program is designed, written and debugged, each function unit is separate, this make whole system easy to debug , maintain , strengthen whole system getting strong.Through studying about USB theory and system of the application technology, as to mastering USB technology thoroughly, it is very helpful to improve my engineering application level in serial interface of intelligence.