远程数据集中器(RDC)将分布在飞机上各部分的低速数字信号汇集到核心处理机架。首先给出一种利用HI-3593芯片实现的ARINC 429总线数据与AFDX网络数据转换的解决方案, 该芯片具有SPI总线接口, 便于与FPGA芯片集成。基于此方案, 并结合以太网MAC层控制器IP核, 采用Verilog硬件描述语言进行SPI协议收发和AFDX组帧逻辑开发, 实现数据集中与转换功能。随后, 提出在AFDX接入部分增加同步客户端(SC)功能, 能够根据接收到的协议控制帧(PCF)获得同步, 使得该数据集中器能够在完全兼容AFDX协议的前提下, 具备接入时间触发以太网(TTE)的扩展能力。

Remote Data Concentrator (RDC) is used to collect the distributed digital signals over the aircraft to the core processing machine.First of all, a solution is put forward to achieve the transformation between ARINC 429 bus data and AFDX network data through HI-3593 chip.HI-3593 has the SPI bus interface to facilitate with the FPGA chip integration.Based on this, the HI-3593 is combined with controller IP core of Ethernet MAC layer, Verilog is used to implement receive-send of SPI protocol and AFDX framing logic development, and eventually to achieve data centralization and conversion.Subsequently, the access to Synchronization Client (SC) in AFDX is proposed, which can achieve synchronization according to the received Protocol Control Frame (PCF), so that RDC can access to the Time Triggered Ethernet (TTE) with the prerequisite of complete compatibility with AFDX.