摘要
针对幅值和频率可调的信号发生器,提出硬件和软件相结合的设计方案。硬件电路由51系列单片机、二通道D/A转换器、二级运算放大器组成。软件采用C51语言、Keil编译器,根据单片机输出D/A数字值的最大值及每个周期采样点数设计产生波形信号的程序。通过按键选择信号波形的类型,加减按键调节波形的频率和幅值,同时将波形的类型、频率、幅值显示在LCD上。采用Proteus仿真平台完成电路仿真与程序调试,利用虚拟示波器进行波形输出显示。实验结果表明,硬件电路和软件生成的波形能达到预期的目标,仿真效果较好,减少了单片机实验结果硬件制作的成本,降低了实验操作难度。
For signal generator with adjustable amplitude and frequency,presents a hardware and software design scheme.The hardware circuit is composed of 51 series MCU,two channel D/A converter and two stage operational amplifier.The software uses C51 language,Keil compiler,according to the MCU output D/A digital value of the maximum value and the number of sampling points per cycle to design the program to produce waveform signal.Select the type of signal waveform by a key,the frequency and amplitude of the waveform are adjusted by adding or subtracting the key,and the waveform type,frequency and amplitude are displayed on LCD.Using Proteus simulation platform to complete circuit simulation and program debugging,the use of virtual oscilloscope waveform output display.The experiment shows that the waveform generated by the hardware circuit and software can reach the expected goal,and the simulation effect is good.It reduces the hardware cost and the difficulty of the experiment.
作者
傅仁轩
王庆华
FU Renxuan;WANG Qinghua(School of Mechanical and Electrical Engineering,Guangdong Polytechnic of Industry and Commerce,Guangzhou 510510,China)
出处
《电子设计工程》
2021年第10期147-151,共5页
Electronic Design Engineering
基金
广东省普通高校特色创新类项目(2018GKTSCX016)。
