接口信号设计中的故障分析与仿真

Detailed Discussion on Interface Signal Design Based On Fault Analysis and Simulation

摘要:

在火箭遥测系统单机的实际研制工程中，遇到两个关于产品FPGA软件的故障，每个故障均定位于两个不同FPGA软件协同工作时的接口信号。为了解决接口信号设计不合理的问题，使用仿真工具对不同软件进行联合仿真，尤其专门针对两个软件间的接口信号的时序进行仿真。通过此种方法很清晰地定位了软件接口信号的故障并且提出了行之有效的改进措施，并且和用示波器测量信号的方法相比，所用方法更加高效、直观、便捷。结果表明，通过对两个不同软件的联合仿真，完美地展现了接口信号的时序，优化了设计流程，目前已将此方法和设计流程作为模块间接口信号设计的必备流程，用于提升产品的可靠性。

Abstract:

In the development of some products in Telemetry system, two FPGA software failures were encountered. Each fault is located at the unreasonable interface signal design when two different FPGA software work together. In order to solve the problem of unreasonable interface signal design, simulation tools are used to satisfy the Co-Simulation of different software. Specialized simulation on the timing of interface signals between two software is conducted. The fault of the interface signal is clearly identified through this method and effective improvement measures have been proposed. Compared with the method of measuring signals using an oscilloscope, this method is more efficient and convenient. The results indicate that the Co-Simulation of two different software could perfectly show the timing of interface signals and optimize the design process. Now this method has been used as a necessary process for designing interface signals between modules to improve the reliability of product design.