基于VGA显示的逻辑分析仪(显示控制部分).doc

JIU JIANG UNIVERSITY 数字逻辑系统课程设计 题 目 基于VGA显示的逻辑分析仪 （显示控制部分） 英文题目 The Logic Analyzer Based on VGA Display（Display Control） 摘 要 逻辑分析仪是一种有效的、最具代表性的数字逻辑分析仪器，目前得到了广泛的应用，但其昂贵的价格和复杂的操作方式，限制了其在小型实验室或教育机构的使用。 基于台式一体机的设计思想，本文提出了一种采用廉价FPGA实现数字逻辑信号采集，处理，由通用VGA显示器显示数字信号的逻辑分析仪。VGA显示输出具有兼容性强，显示内容丰富，不需要依靠计算机Display Based on the Logic Analyzer Design Abstract Logic analyzer is an effective, most representative of digital logic devices have been widely used at present, but its high price and complex mode of operation, limited in a small laboratory or educational institution use. ??? ?Desktop machine based on one design, the paper proposes a low-cost FPGA using digital logic signal acquisition, processing, generic VGA display by the digital signal of the logic analyzer. VGA display output with the compatibility, display rich content and do not need to rely on the computers advantage. ???? Thinking on one machine, system hardware is divided into five parts, namely, the signal input unit, FPGA core processing unit, input control unit and the status display unit and the VGA interface unit. Respectively, and the signal is input shaping, acquisition and processing, work status, and display data DA conversion. This resistor divider with the way color signals DA conversion, the binary RGB data frame, converted to corresponding analog voltage signal. Ultimately multiple logic signal acquisition, processing, waveform data will eventually be shown on the VGA monitor. ???? Logic processing, we adopt the EDA design from top to bottom, first, by function, module, trigger control module is divided into sampling, the sampling frequency control module, dual-port RAM memory modules, waveform display control module, VGA display driver module, keyboard Display control module 6 module; Then, the corresponding VHDL language design module, the paper analyzes the working principle of progressive scan VGA and, ultimately, the display of data; Finally, the level at the syst