基于STM32的程控多路数字信号发生器设计  

Programmable Multiplex Digital Signal Generator Design Based on STM32

作　　者：李钰 宋建[1,2] LI Yu;SONG Jian(Guangdong Advanced Polymer Manufacturing Technology and Equipment Key Laboratory,South China University of Technology,Guangzhou 510640,China;Key Laboratory of Polymer Processing Engineering,Ministry of Education,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学广东省高分子先进制造技术及装备重点实验室,广州510640 [2]华南理工大学聚合物加工工程教育部重点实验室,广州510640

出　　处：《自动化与仪表》2023年第8期74-78,83,共6页Automation & Instrumentation

基　　金：国家自然科学基金项目(11972023);广州市创新领军团队项目(201809010011)。

摘　　要：该文设计了一种基于STM32芯片与UCOSIII操作系统的程控多路数字信号发生器。采用DDS芯片AD9833与数字电位器MCP41010配合实现了激振信号的发生与调幅;基于RS485接口与Modbus通讯协议实现信号发生器与上位机的实时通讯;基于emWin图形库设计了人机交互界面,可以在触摸屏上设定选定激振信号参数。经试验测试表明,设计的程控多路数字信号发生器能够产生波形、频率与幅值均独立可调的交流信号,并能够根据上位机传递的通讯信息实时对信号进行调节,满足多路激振信号源的应用需求。In this paper,a programcontrolled multiplexed digital signal generator based on STM32 chip and UCOSIII operating system is designed.The DDS chip AD9833 is used to cooperate with the digital potentiometer MCP41010 to realize the generation and amplitude modulation of the excitation signal.Realtime communication between signal generator and host computer based on RS485 interface and Modbus communication protocol.Based on the emWin graphics library,the humancomputer interaction interface is designed,and the selected excitation signal parameters can be set on the touch screen.Experimental tests show that the designed programcontrolled multichannel digital signal generator can generate AC signals with independent adjustment of waveform,frequency and amplitude,and can adjust the signal in realtime according to the communication information transmitted by the host computer to meet the application requirements of multiple excitation signal sources.

关 键 词：数字信号发生器 STM32 UCOSIII emWin MODBUS 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]