一种CCDL的FPGA设计与实现

多余度技术能够满足飞机管理系统中高安全性、确定性和可靠性的需求，而交叉通道数据链路（ CCDL）是余度计算机之间进行数据和信息交换的重要途径，是保证余度飞机管理计算机正常运转的关键部件。文中基于三余度飞机管理计算机系统需求，给出CCDL硬件逻辑设计的体系架构，对CCDL的关键点进行分析，设计了一种在1394总线上进行点对点可靠传输、防止故障蔓延的交叉通道数据链路，并进行了FPGA实现和验证。实验结果表明，该设计能够高效可靠地满足系统的应用要求。

Design and Implementation of Cross Channel Data Link on FPGA

The vehicle management system requires the highest security,ascertainment and reliability in future,and the redundancy tech-nique can satisfy the system＆#39;s requirement. But the Cross Channel Data Link （ CCDL） is important for data and information exchange a-mong redundancy computers. Also it is a key component to guarantee the redundancy vehicle management computer＆#39;s normal operation. Based on the system＆#39;s performance demands of treble-redundancy plane management,the structure of the CCDL hardware logic design is given. Then the key functions of the CCDL are analyzed and designed. An cross channel data link which transmits reliably by point to point and prevents from fault spread on the 1394 bus is designed,and the CCDL is realized and validated on FPGA. The experiment re-sults indicate that the CCDL design can fulfill the system application requests with the high efficiency and reliability.