基于FPGA设计EnDat编码器数据采集后续电路

Design of EnDat Encoder Follow-up Data Acquisition Circuit Based on FPGA

随着集成电路技术的发展,FPGA以其体积小、速度快、功耗低、设计灵活、利于系统集成、扩展升级等优点,被广泛地应用于高速数字信号传输及数据处理。EnDat数据接口是适用于编码器的双向数字接口。EnDat可传输编码器的位置值,也能传输或更新保存在编码器中的信息或保存新信息。在此介绍了EnDat接口的特点、功能、时序和数据传输、OEM数据存储,以及编码器数据采集后续电路设计方案,基于FPGA编码器接口的设计,用以进行编码器和DSP处理器之间的通讯。

With the development of integrated circuit technology,FPGA with its advantages of small size,high speed,low power consumption,flexible design,which will help system integration,expansion and upgrading,is widely used in high-speed digital signal transmission and data processing. EnDat data interface is suitable for bi-directional encoder digital interface. EnDat encoder can transmit position value and can also transmit or update the information stored in encoder or save the new information. This article describes the features,functions,timing and data transfer,OEM data storage of EnDat interface,as well as the follow-up data collection encoder circuit design. Based on the encoder interface design of FPGA,the communication between encoder and DSP-processor is carried out.