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针对传统的电力系统设备程序更新不方便的问题,提出了一种通过在电话网络上利用73M2901C实现PC机与远程单片机系统通信,从而对基于单片机系统的电力系统设备进行远程程序升级的方法。对PC机、电话线、单片机系统之间的转换接口硬件电路设计做了详细的论述,并在软件设计中采用了在应用中编程IAP(In-Application Programming)的设计思想,简化了硬件电路的设计。此程序升级方法可以用在大多数利用单片机开发的电力系统设备上。
Aiming at the inconvenient updating of traditional power system equipment program, this paper presents a method of remote program upgrade of power system equipment based on SCM by using 73M2901C to realize the communication between PC and remote SCM system over the telephone network. The hardware circuit design of conversion interface between PC, telephone line and SCM system is discussed in detail, and the design idea of programming IAP (In-Application Programming) in the application is adopted in the software design to simplify the hardware circuit design. This method of program upgrade can be used on most power system devices that have been developed using microcontrollers.