摘要
基于ARM7处理器LPC2210的锁相环功能与处理器的时钟频率,描述了A/D转换时钟频率的计算公式。设计了基于ARM7的数据采集系统。阐述了基于I^2C总线协议实现数据存储的功能,说明了向存储器写入数据,从存储器中读取数据的函数调用。基于ARM7和μC/OS-Ⅱ操作系统的多任务应用,给出了创建多任务的流程图。通过网页可以显示实时数据采集值、报警上下限值、实时时钟和历史数据。基于TCP协议实现了数据采集与网络传输系统的功能。
Based on PLL function and clock frequency of the ARM7 processor LPC2210, the calculation for- mula of A/D conversion clock frequency was described and the ARM7-based data acquisition system was de- signed; and the function of data storage based on I2C bus protocol was expounded and writing the data to thememory and reading the function call of data from the memory were explained. Basing on ARM7 and μC/OS-Ⅱ operating system-based multi-task application to present the flow chart of creating multi tasks was implemen- ted, including the display of real-time data acquisition values, the upper and lower limits of the alarm, real- time clock and data collection of historical data and other functions through the web page and the realization of the function of data acquisition and network transmission system based on TCP protocol.
出处
《化工自动化及仪表》
CAS
2017年第6期591-594,608,共5页
Control and Instruments in Chemical Industry
基金
北京市自然科学基金项目(4162025)
