LonWorks节点中主从处理器之间I^2C接口的设计  

Design of the I^2C Interface for the LonWorks Node Based on the Architecture of the Host/Slave Processor

作　　者：杨帅[1] 薛岚[1] 刘利宏[1] 吴红兵[1] 

机构地区：[1]淮安信息职业技术学院电气工程系,江苏淮安223003

出　　处：《电子科技》2009年第7期62-65,共4页Electronic Science and Technology

基　　金：黑龙江省教育厅科学技术研究基金资助项目(11513037);江苏省淮安信息学院数字化资源建设基金资助项目(B073403)

摘　　要：为提高LonWorks总线的控制能力,设计了以单片机AT89S51为主的处理器、神经元芯片MC143150为从处理器的LonWorks节点,主处理器和从处理器之间的接口采用I2C通信总线,节省了神经元芯片的I/O硬件资源,同时也减小了节点的体积。LonWorks节点利用Neuron芯片中声明的I2C对象和单片机AT89S51模拟的I2C总线完成主、从处理器间的数据交换。测试证明,主从处理器采用I2C总线的节点,具有良好的通信性能。In order to improve the control capability of LonWorks fieldbus, a LonWorks node with Microcontroller AT89S51 as the host processor and Neuron chip MC143150 as the slave processor is designed. The interface between the host processor and slave processor is designed using the I^2C bus, thus saving I/O hardware resources of the Neuron chip and decreasing the size of the node. Data exchange in the LonWorks node is completed through the I^2C object declared in the Neuron chip and the I^2C bus simulated in Microcontroller. Test resuits show that the node with the I^2C bus adopted for the host/slave processor has good communication capability.

关 键 词：LONWORKS 节点 AT89S51 MC143150 I^2C 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]