The Research And Design Of LED-Screen Control System And Drive Program

With the high development of communication in our society, LED large screen include so many kinds of technique such as semiconductor technology, electrocircuit, integrate circuit, image manipulation, information transfers, computer network and electronic manufacture technology and engineering has become more and more active in the information field, and also make a great progress with application and populaziration in every walk of life. From the development of the material of LED, the technique of ash-degree control, the clearly multicolor image's displaying to the active and high efficient drive electrocircuit, also the improving skill of control system are all incarnate the great progress of the LED-industry. In addition , with the development of network LED large screen is more and more in used , intelligentize net control and net-join control technology are also bu used in practice under the multimedia and information display system composed with multi-device environment. In the basis of the LED large screen system request and consult datum, this text analysis and sum up the design project. Such as system-configuration, whole system task flow, the design of software control system, the programmer for serialcommunication and the control for singlechip. The system task flow is : under the compilation-tool of the software control system the compilation-work can be accomplished; then accomplish picking up the information word-model, afterwords adding extra display effect into system according to the display pattern and save the handled file which needed, multi-files can also be saved to one file, and then transfer data by using Windows functions. After transfer data to the hardware system SMC, save the data and drive the led-field-array, the image displaying is come true. As the project's request, the software-model include four section: 1, compilation function model:according to the windows operating system, the design of software style is just as the windows. Through the button in the menu , accomplish the compilation-work. 2, picking-up word model: in order to accomplish compilation, save and foresee in one line , the system achieve it by the software control. 3, add additional effect and foresee model: through adding the active effect, plentify the display model and before saving it can be foreseed. 4, serialcommunication model: under the using request the system's communication between computer and hardware-model is just as the serialcommunication. When it under the windows API function. The hardware-model is under the singlechip's control, achieve saving the information and driving the LED. Including : 1, led-field-array display: it is consist of LED, fixation and driving electrocircuit. At last through the control of singlechip accomplish the word and picture display. 2. center control system: under transfer data to the hardware system SMC, save the data and drive the led-field-array, the image displaying is come true. Through the EPROM save-model achieve saving data. According to the analysis and design of the system, arithmetic, program and support of hardware device, the system is lucubrated and the function of the software control system module and the hardware microcontroller is design, and then finally is in used in reality. But at the same time, the analysis and design is lied on the applied request. This system is engaged in propaganda for the traffic law in the hall of traffic direct and control. To other application request, whether this system is needs updating or the...