为了解决通用嵌入式操作系统在微型PLC设计上的不足,提出一种适用于微型PLC的面向对象嵌入式操作系统设计方案.该系统由内核、PLC解释器、I/O存储空间映射、驱动程序等部分组成,其中内核又由工厂、事件管理、用户接口以及任务管理等模块组成.其特点是采用面向对象、模板以及设计模式的方式编程,从底层提供对微型PLC设计的优化,提供动态内存分配与自动回收功能和内存与I/O口的映射功能,且内嵌PLC解释器.经过测试表明该嵌入式操作系统可满足微型PLC的设计要求.%In order to overcome the shortage of general embedded operating system in micro PLC design, a design of object-oriented embedded operating system for micro PLC is proposed. The system consists of the kernel, PLC interpreter, I/O memory map, drivers and other components. The kernel includes factories, event management, user interface and task management module. The characteristics in duding using object-oriented, templates, and design patterns approach to program, providing low-level optimization to micro-PLC design, Providing dynamic allocation and auto-recovery function of memory, Provideing function of memory and I/O port mapping, and embedded PLC interpreter. Experiments show that this embedded operating system can be satisfied the design requirements for micro PLC.
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