The Design Of The Super-Speed Recorder's Controller And USB Interface

With the arrival of information age, the digital information has already become mosts important resource of mankind, Paper quality the electronizations of file, digitalization punish and succeed the development trend already. The statistics show, the alone commercial form of every country in the world inputs the expenses and up to 130 billion yuan every year, It is turned to today when digitalization handles official business gradually, The backwardness that the data inputted and processing the way and means already became and restrained the computer from using the bottleneck of development.This thesis develop the new super-speed document to record into automatically the equipment proceeded the research and design, and input optimization on the hardware to the file specially, input the speed and degree of accuracy in order to improve files, While lowering costs,it adopt both at home and abroad advanced technologies,raising nature price than, Save manpower and material resources. In order to realize this purpose, we have given up traditional CCD photoelectricity system, but select CIS for use. In interface, we adopt the technology of mainstream of the world too --The bus interface of USB. The groundwork includes:1. It studies to be at College of Opto-Electronic Engineering Chongqing University design to input and process field automatic to input machine file high speed to data specially, Its main technical indicator has relatively high level, and to inputting the optimization on the hardware at a high speed of form file specially, Through substituting CCD( Charge-coupled Device) wait for way simplify hardware structure, make its easy heavy large-scale production by CIS( Contact Image Sensor), Have lowered costs by a large margin while realizing overall production domesticization.2. Study the technology of the code and inputting the application in the machine . Because it is gathering piecemeal to input the scanning to the file of the machine, and the domain of the file is generally to have the the law one, So the middle have it is not heavy very it is degree redundant. If transmit initial data directly, have already taken up valuable outside RAM resources, Have lengthenned time of transmitting again. After the algorithm adopted certainly is clicked and compressed to sampling harmlessly, can already reduce data transmission time , Having reduced the work load of PC again, the speed of inputting the machine improved from whole . 3. In interface, have adopted USB interface. The USB interface design involves the programming of the software and hardware in calculator and circuit design.In the circuit aspect, it record into with document the semaphore of the machine collect to use the data wire totally and address wire, avoid the data and the clash of address is to design a little bit difficult.In programming aspect, make use of USB several canals well, make handshake semaphore matched with with collect the data mutually, can increases significantly transmission speed, from but increase the document records into the whole performance of the machine.