PROFIBUS主站单片机实现方案分析

The Analysis of Designing on PROFIBUS Master Using Single-Chip Microcomputer

针对PROFIBUS主站单片机实现方案,对接口连接电路进行介绍并重点对UART发送过程中字节间隔导致的通信失败问题进行具体分析。在软件上,对标准文件状态机的结构和功能进行说明并对访问控制中较难理解的主站入网过程和任务调度及优先级予以分析。

To the programme of PROFIBUS Master using single-chip microcomputer, the article introduces the circuit of interface and analyzes the problem leading to communication failure for interval between bytes when UART is sending a message. Besides, the article explains the structure and function of state machine in Chinese Standard document and analyze the process of Master entering token network and the scheduling and priority of tasks.