基于FPGA的EnDat协议时序研究  

Study of the timing sequence of EnDat protocol based on FPGA

作　　者：蔺春波 吴宏圣[1] 乔栋[1] 张雪鹏[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《电子测量技术》2016年第3期91-94,共4页Electronic Measurement Technology

摘　　要：国内对EnDat协议的研究局限于读取编码器的位置信息,对没有研究编码器寄存器,而这些寄存器提供了编码器在运行过程中的重要参数,本文针对这一缺陷研究了EnDat协议的寄存器读取时序。根据EnDat通讯协议手册,设计了能够访问海德汉LC183绝对式光栅尺内部寄存器的接口电路;通过测试和分析西门子SMC20协议转接盒与海德汉LC183绝对式光栅尺之间的通讯时序,在FPGA上编程实现了寄存器访问时序。实验测试证明,设计的接口电路能够按照测试的时序正确访问LC183的内部寄存器。Domestic study of EnDat protocol limited to reading position from the encoder,the registers of encoders had never been used,while the registers contained important parameters.According to the handbook of EnDat protocol,this paper designed the interface circuit for accessing the registers of heidenhain LC183 absolute linear optical encoder;tested and analyzed the timing sequences between siemens SMC20 and heidenhain LC183 absolute linear optical encoder,programed a process on FPGA and realized the register access timing sequences.Experiments showed that the designed interface circuit and the realized timing sequences can be used to read the registers of heidenhain LC183 absolute linear optical encoder normally.

关 键 词：绝对式光栅尺 EnDat协议 海德汉 西门子SMC20 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]