摘要
本文采用单片机控制DDS专用芯片(AD9854)设计了信号发生器。以AD9854芯片为核心,详细分析了该信号发生器的系统结构、软硬件设计和具体电路实现,并介绍了使用单片机STC12LE5A56S2对AD9854的控制方法。信号发生器利用计算机串口通信技术,使用上位机通过串口对下位机控制,通过人机交互的控制方法产生正弦单频信号、扫频信号、FSK调制信号等波形。本信号发生器的优点是硬件电路简单,软件功能完善,人机界面友好,控制方便,性价比较高等特点,具有一定的使用和参考价值。
A signal generator based on a Digital Direct Synthesis （DDS） chip （AD9854） and a single chip microcomputer is designed. Using AD9854 as the core, the thesis analyzes the system structure, the design of software and hardware and the way to realize the circuit of the signal generator, introduces the method of controlling AD9854 by STC12LE5A56S2. The signal generator can produce the sine wave, sweep frequency signal and FSK by human-computer interaction control using the serial port communication technology of computers. The signal generator has the advantage of simple circuit, perfect software function, friendly human-computer interface, convenient control and high cost-effective. It has some use and reference value.
出处
《电子设计工程》
2015年第14期93-95,共3页
Electronic Design Engineering
基金
山西省高等学校大学生创新创业训练项目(2014281)
2014年度校级大学生创新性实验项目(xj2014068)
