基于FPGA方向的大型屏幕显示系统设计设计445548.docVIP

基于FPGA方向的大型屏幕显示系统设计 摘 要 主要研究基于Altera公司FPGA芯片的电子显示屏的研究，配备相应的PC机软件，可合拢、开帘形式FPGA系统设计；2.显示接口电路的设计；3.时钟接口电路的设计；4. FPGA系统与PC机通讯接口(RS232)的设计。FPGA控制模块控制的协同工作，并处理的数据。RS232串口实现。用户可以通过上位机软件发送待显示的数据给FPGA控制系统。采用FPGA为核心控制模块，通过接收上位机数据控制LED点阵显示信息,同时通过键盘来控制显示方式，并且在数码管上显示实时时钟。软件部分根据各芯片的时序图进行模块编程，消除了竞争和冒险。通过编程、调试、仿真、下载正确地实现了合拢、开帘形式 ABSTRACT The main research based on Alteras FPGA chip electronic display, a PC equipped with the appropriate software, can be realized together and open the curtains, move around the display in the form, and can display the clock. Specific content: 1.FPGA system design; 2 shows the design of the interface circuit; 3 clock interface circuit design; FPGA system and PC, the design of the communication interface (RS232). FPGA control module controls the clock module, dot matrix display module, the PC communication module to work together and to analyze and process the received data. The clock module clock chip to read and write, including clock initialization and clock information read the final clock with digital display. Dot-matrix display module LED dot matrix drive and display functions. Drive using a shift register 74HC595 shift register 74HC164 74HC595 is responsible for column scan data, the 74HC164 is responsible for the line scan data. Line scan using current transistor amplifier to increase the scanning strength, improve dot matrix screen brightness. LED dot matrix 16 size 32mm * 32mm 8 * 8 common anode dot matrix composed of 16 * 64 dot matrix, you can display four characters, dot matrix screen is removable, round hole copper pin connection performance good. Serial communications through the RS232 serial interface. Users can use the software to send data to be displayed to the the FPGA control systems. Using FPGA as the core control module, LED dot matrix display is controlled by the host computer receives data through the keyboard at the same time to control the display and digital display real-time clock. Software are based in part on the timing d