摘要
设计了一种电话按键音只别嵌入式系统,采用基于STC89C52单片机和DTMF信号收发芯片MT8880进行信号采集和处理,给出了系统的硬件电路结构图和系统软件设计方法.系统具有硬件处理信号的功能,由单片机从声音中获得按键信息并显示在LCD 1602上,根据测试结果可知,系统具有操作方便、性能稳定和检测准确率高等优点.
Dual tone multiple frequency signal acquisition and processing is studied. A telephone keyboard tone recognition embedded system is designed based on STC89C52CCM and DTMF signal reception and sending chip MT8880. The hardware structure diagram of the system and the design method of software program are given. The system can process signal by hardware, and the message which hides in sound can be displayed on the LCD 1602. Test results show that the sound process system based on the STC89C52CCM and receiving and sending chip MT8880 has many advantages, such as convenient operation, stable running and accurate test results.
出处
《上海电力学院学报》
CAS
2013年第6期615-619,共5页
Journal of Shanghai University of Electric Power
基金
上海市自然科学基金(11ZR1414300)
上海市教育委员会科研创新项目(11YZ194)
关键词
电话按键音
信号识别
嵌入式系统
telephone keyboard tone
signal recognition
embeded system
