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在地铁列车乘客紧急报警系统的设计过程中,采用AT89C52实现主控制逻辑,报警主机和分机之间的通信使用基于MT8888的DTMF通信,并使用EPM1270实现CRC8算法,提高了通信的安全性和可靠性。该系统具有存储功能,利用自行设计的键盘可实现格式化存储器。
In the subway train passenger emergency alarm system design process, the use of AT89C52 main control logic, alarm host and extension communication between the use of DTMF MT8888-based communication and the use of EPM1270 CRC8 algorithm to improve the communication security and reliability . The system has a storage function, the use of self-designed keyboard can be formatted memory.