摘要
笔者主要介绍了Modbus协议在现场总线控制中的应用,提出了基于嵌入式的面向对象的Modbus调度系统。根据各个应用程序的通信需求,采用面向对象的方法进行硬件资源的分配。通过通信任务调度,提高通信任务的完成效率。同时,采用状态机的方法,简化了系统的实现过程。通过DMA的通信控制方式,降低了通信数据收发的CPU使用率。
At the beginning of this thesis the field bus technology application of Modbus protocol are presented.An embeddedbased object-oriented Modbus communication dispatch system is proposed.Hardware resources are assigned for communication requirement of applications by object-oriented method.Communication tasks are dispatched sequentially to improve the efficiency.State machine is used to simplify the system realization process.DMA is used for serial communication to reduce CPU usage.
作者
程轶斐
曾培峰
Cheng Yifei;Zeng Peifeng(Donghu University,Shanghai 201620,China)
出处
《信息与电脑》
2018年第2期43-46,共4页
Information & Computer
