| 基于Modbus协议的触摸屏串口扩展电路设计 |
| |
| 引用本文： | 蔡刚,郑力新. 基于Modbus协议的触摸屏串口扩展电路设计[J]. 现代科学仪器, 2009, 0(4): 55-58 |
| |
| 作者姓名： | 蔡刚 郑力新 |
| |
| 作者单位： | 华侨大学信息科学与工程学院,福建泉州,362021 |
| |
| 基金项目： | 国家教育部科学技术研究重点项目，福建省优秀人才支持计划资助 |
| |
| 摘 要： | 针对触摸屏串口数目少，连接设备不灵活（主要是PLC）的缺点，设计了串口扩展电路，实现串口1—4的扩展。电路中单片机控制单元通过标准MODBUS协议和触摸屏通讯，扩展功能则由集成异步通信芯片TL 16C554A完成，扩展后的串口可根据与需要灵活制定相应的协议与下位机传送数据。经实践验证，本扩展电路具有通讯灵活稳定、实时性好的特点。
|
| 关 键 词： | 触摸屏 串口扩展 Modbus协议 |
Design of Serial Port Extension Circuit Communicating with Touch Screen Based on Modbus Protocol |
| |
| Cai Gang,Zheng Lixin. Design of Serial Port Extension Circuit Communicating with Touch Screen Based on Modbus Protocol[J]. Modern Scientific Instruments, 2009, 0(4): 55-58 |
| |
| Authors: | Cai Gang Zheng Lixin |
| |
| Affiliation: | (College of Info Science and Engineering, Huaqiao University, 362021, Quanzhou, Fujian,China) |
| |
| Abstract: | To overcome the drawbacks of touch screen such as small number of serial ports and inflexible connecting to equipments expect PLC ,we designed a serial port extension circuit from 1 to 4. The MCU of circuit communicates with touch screen adopted Modbus protocol. The extended function was realized by Integrated Asynchronous Communication Element TL16C554A. Protocols of the four extended ports can be defined flexibly according to the need of transferring data to its connected machine. The results of its practical application indicated that this design is of flexibility, stability and practice. |
| |
| Keywords: | Touch screen Serial port extension Modbus protocol |
| 本文献已被 维普 万方数据 等数据库收录！ |
