Design And Research Of Display Of LED Contral System Based On GPRS

With the development of science and technology, LED advertising screen with improving performance and price lower, LED advertising screen as a new information display media in the modern information society get more people's recognition of and widely application, at present one of the development direction of advertising screen is the wireless LED advertising screen design and use.Demanding environment must open for the covered and GPRS signal,this paper presents a design of wireless LED advertising screen where there is no lines of communication and power lines set up, much people passing by, and only request in written form of advertising. This design with MSP430 microcontroller as control core, realized the function of the wireless communication, LED solar collecting, power of testing and controlling, function circuit design of LED display drivering. Hardware circuit system was designed using the applied widely and low-powered chip MSP430F149 as controller, combined with other CMOS chips as peripheral parts, built a kind of typical wireless LED advertising screen in practical aspect of hardware structure. The solar power plays with the characteristics of the low consumption, the system is stable and reliable, and fully utilized the main control chip bringing AD transform function battery voltage of real-time sampling, and improved the accuracy of power testing system, and ensured the stability of the power supply system. Wireless information transmission adopts the SIM300C module, using GPRS wireless network transmission control command of font and information reliable transmission, to read and matching word-model codes in control module, to avoid a lot of amount of data,making the transmission more concise and stable. PC programming adopted VB, realizing the conversion of Chinese characters to unicode and the transmission of unicode andcontrolling command. Software of microcomputer system divided into the system control module and LED drive module, each functional module divided into different tasks,and independent programmed respectively.