基于双口 RAM 的并行数字信号模拟器研究设计

摘要

为了能够和飞行试验中用到的通用采集器相配套，设计了一套适用于航空器飞行试验的并行信号模拟器.模拟器采用 P87C51作为控制芯片，双口 RAM 作为单片机和通用采集器的数据交互媒介，采用 USB 2.0高速传输接口与上位机通信，满足了实时控制与数据上传的要求，提高了数据传输速率.讨论了双口 RAM 的地址空间分配和数据共享冲突等问题.该模拟器保证了飞行试验数据的准确性.%A parallel signal simulator suitable for aircraft flight test is designed,which matches the general collector used in aircraft flight test. The simulator adopts P87C51 as the MCU,and dual port RAM as the interactive media bettwen the MCU and the general collector. USB 2.0 high⁃speed transmission interface is adopted for the communication of upper computer,which meets the requirements of real⁃time control and data uploading and improves the data transmission rate. The paper discusses the dual port RAM address space allocation and data sharing conflict.