摘要
本文在分析和参考了目前profibus总线技术发展趋势和其DP主站开发现状的基础上,给出以西门子协议芯片ASPC2和ARM芯片S3C44B0作为基础来开发PROFIBUS-DP智能主站的方案。指出DPRAM在DP主站数据交换接口设计中的优势,并着重分析了DPRAM IDT70261L55PF的工作原理和仲裁机制,采用中断仲裁方式解决DPRAM争用问题,保证了数据交换的实时性,高速性。在此基础上给出了实现DP主站高速数据交换的硬件接口设计电路并辅以说明。
Based on analyzing and referring current development tendency of bus-techonology and exploitationstatus of DP master station,scheme of developing PROFIBUS -DP intelligent master station based on siemens protocol chip of ASPC2 and ARM chip of S3C44B0 was presented in this paper.Introduced the advantage about DP master station data switching interface design by DPRAM, emphatically analyzed the operational principle and arbitration mechanism of DPRAM of IDT70261L55PF,and interruption of arbitration mode was used to solve the dispute problem of DPRAM,so that highspeed performance and timeliness of data switching was ensured.On this base circuit of hardware interface design which can realize highspeed data switching of DP master station is presented and essential description was gived.
出处
《微计算机信息》
2011年第4期21-23,共3页
Control & Automation
