实时微测量系统指令集及解析算法

Command set of real-time micro-measurement system and its analyzing algorithm

为了使数字测量环节尽可能靠近转换装置输出端,减少在长距离传输小信号过程中引入的干扰,提出了一种嵌入式微测量系统的设计方案。硬件上采用功能互补的FPGA与ARM双核心,软件上以实时操作系统为基础加载指令交互模块及其他应用代码。FPGA模块具备实时性和同步性,用于实时同步采样,ARM在通信等事务性操作上更为灵活可控,用于实现指令解析与回复。程控指令集参考现有示波器指令集的规范,另规划了二次开发接口,具有拓展性和可移植性。

To minimize the interference in the long-range transmission of small signal,we propose a new design scheme of an embedded micro-measurement system where the digital measurement part is close to the output of the converter. It uses dual-core hardware system with field-programmable gate array（ FPGA） and advanced RISC machines（ ARM） and program-controlled command set based on real-time operating system in software. FPGA takes charge of synchronous sampling in the system for its real-time performance,while ARM could be used to analyze the command and send reply since it is more flexible and easily to be controlled in transaction issues. This command set is referred to the command syntax of oscilloscope,based on the real-time operating system and the properties of ARM as well. Meanwhile,it has the open part to develop the secondary interface in the future,which make the system more flexible and expandable.