基于嵌入式Linux的无纸记录仪通信设计

Design of Communication for Paperless Recorder Based on Embedded Linux

本文提出了一种基于嵌入式Linux操作系统下的无纸记录仪串口通信设计方案,利用Linux的多线程编程技术,实现了基于MODBUS协议RTU和ASCⅡ两种通信格式共存的传输模式。在数据交换方面,提出了一种新的快速数据转换算法,提高了串口通信的实时性。本文给出了串口通信设计的整体流程及具体的编程实现方法,并在实际应用中验证了该方案的可行性。

This paper presents a design of serial communication for paperless recorder based on embedded Linux. Using the multi-thread programming,the design makes it possible that the RTU and ASCⅡ communication format in MODBUS protocol can coexist in one system. A new fast data conversion method is put forward in data exchange to improve the real time performance. The paper gives the whole design flow and the programme details. Also,the design is proved efficiently through practice.