Design Of LED Dot Matrix Display System Based On AT89C51 Single Chip Microcomputer

LED display, LED panel) is composed of multiple leds (light emitting diode), is widely used in hospital, bank, station, wharf, advertising window and other public places. LED development up to now, has been in the irreplaceable role in people’s life, in the future will also will be more and more extensive application and development.This paper designed a controlled by PC management module of the wireless LED dot matrix display screen, used in the design of the ZigBee a new generation of wireless communication technology, has realized the close range wireless transmission, can change the content of the display body is convenient, flexible, cable transmission is more than ever with broad space for development.AT89C51 single-chip microcomputer as the controller in the design of the control system for the LED dot matrix display screen. This paper puts forward the overall scheme of dot matrix display system, mainly including PC control module, wireless transmission module and single-chip microcomputer control module three parts. Then a detailed analysis of the three modules of software and hardware design, including PC control module was conducted on the Visual Basic development platform, the function of upper machine is the input text into hexadecimal data and transmitted to the wireless transmitting module; Wireless transmission module is using Zigbee agreement as a medium, receive superior to receive data and send to the wireless receiving module; Single-chip microcomputer control module is mainly responsible for will receive data through the driver lit LED lattice screen, and can achieve a stationary in the text, left, right, loop display a variety of ways. Among them, the line displacement and column drive with 74 he 154 and 74 hc595 are needed chip, based modules, LED dot matrix module selects 8*8 dot matrix screen size is 16*16 16 rows,16 columns, every 4 piece are arranged constitute a 16*16 dot matrix screen. The use of Proteus simulation software test, simulation results prove that, through the information transmission, wireless transmission module of this design to PC need to display Chinese character or character, through the display screen, to achieve the purpose of this design and requirements.