毕业设计（论文）-基于51单片机的数字频率计设计.doc

毕业论文 课题：基于单片机的数字频率计的设计 摘 要 本方案主要以单片机为核心，主要分为时基电路，复位电路，显示电路三大部分，设计以单片机为核心，利用单片机的计数器和定时器的功能对被测信号进行计数。编写相应的程序可以使单片机自动调节测量的量程，并把测出的频率数据送到显示电路显示。 本设计以89C51单片机为核心，应用单片机的算术运算和控制功能并采用LED数码显示管将所测频率显示出来。系统简单可靠、操作简易，能基本满足一般情况下的需要。既保证了系统的测频精度，又使系统具有较好的实时性。本频率计设计简洁，便于携带，扩展能力强，适用范围广。 [关键词]单片机，运算，频率计，LED数码管。 Abstract The program mainly microcontroller as the core, are divided into time-base circuit, the logic control circuit, amplifier shaping circuit, the gate circuit, the counting circuit, latch circuit, decoding circuit most of the seven shows, design a microcontroller as the core, the measured signal the first amplifier to amplify the incoming signal, and then was sent to the waveform shaping circuit surgery, the measured sine wave or triangle wave shaping as a square wave. Counter and timer microchip features of the signal count. Write the corresponding program can automatically adjust the measurement range of SCM, and the frequency of the measured data to the display circuit displays.The design of the 89C51 microcontroller core, microcontroller applications and control functions and arithmetic operations with LED digital display tube to the measured frequency is displayed. System is simple, reliable, easy to operate and can basically meet the general needs. Both to ensure the accuracy of the system frequency measurement, but also the system has good real-time. The frequency meter design is simple and easy to carry, expansion capability, wide application.[Key words] microcontroller, operation, frequency meter, LED digital tube。 朗读 显示对应的拉丁字符的拼音 ? 字典 - 查看字典详细内容  1.1课题背景 1 1.2 课题研究的目的和意义 1 1.3数字频率计设计的任务与要求 1 2 数字频率计总体方案设计 2 2.1方案比较 2 2.2方案论证 3 2.3方案选择 3 3 数字频率计的硬件系统设计 4 3.1 数字频率计的硬件系统框架 4 3.2 数字频率计的主机电路设计 5 3.3数字频率计显示电路的设计 9 4 数字频率计软件系统设计 12 4.1中断控制 12 4.2定时器/计数器 12 4.2.1定时工作方式0 13 4.3程序流程图设计 14 4.3.1主程序流程 14 4.3.2 中断流程 15 5 数字频率计的仿真调试 16 5.1数字频率计的仿真调试 16 心得体会 17 参考文献 18 附 录1 电路原理图。 19 附 录2 20 1 绪 论 1.1课题背景 在电子技术中，频率是最基本的参数之一，并且与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得