基于TMS320LF2407A的DTMF产生与检测实验系统设计  

Design on DTMF Signal Generation and Detection Experiment System Based on TMS320LF2407A

作　　者：陈芬[1] 严迪群[2] 彭宗举[2] 

机构地区：[1]宁波大学光纤通信与网络技术研究所,浙江宁波315211 [2]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《现代电子技术》2005年第10期76-78,81,共4页Modern Electronics Technique

摘　　要：DTMF (双音多频)信号是音频电话中的拨号信号,广泛应用于新一代电话机。介绍了一种基于DSP的DTMF信号产生与检测实验系统的设计原理以及软硬件开发过程,该系统主要是在2台以TI的TMS32 0 L F2 4 0 7A为核心芯片的DSP教学实验箱上实现的。实验结果表明:在实验箱1上的小键盘击键信息总能准确无误地通过实验箱2上的L CD显示出来,整个系统具有很高的实时性和可靠性。该系统的开发使学生能更深刻地理解DTMF信号的实质以及用DSP产生与检测DTMF信号的软硬件开发过程。DTMF (Dual Tone MultiFrequency) signal is dialing signal in tone telephone, applied in many new field widely. An experiment system of DTMF signal generation and detection based on DSP chip is described in this paper. Design principle and software and hardware development process of the system are presented in detail. The system is realized mostly through two DSP teaching experiment boxes whose core is the TMS320LF2407A DSP chip. The experiment results indicate that the information from the small keyboard in the first experiment box can be displayed well and truly through the Liquid Crystal Display in the second experiment box. The realtime performance and the reliability of the system are excellent. With developing the system, the students can understand the essential of the DTMF signal very well and can be familiar with the software and hardware development process of the DTMF signal generation and detection based on DSP chip.

关 键 词：双音多频 DSP TMS320LF2407A GOERTZEL算法 

分 类 号：TN911.72[电子电信—通信与信息系统]