基于VxWorks系统下P2020的PCIE转PCI接口设计  

Design of PCIE to PCI intrface base on P2020 under VxWorks system

作　　者：王琪 邓佳伟 张梅娟[1] WANG Qi;DENG Jiawei;ZHANG Meijuan(The No.58 Research Institute of China Electronics Technology Group Corporation,Wuxi 214062,China)

机构地区：[1]中国电子科技集团公司第五十八研究所,江苏无锡214062

出　　处：《电子设计工程》2021年第7期190-193,共4页Electronic Design Engineering

摘　　要：基于VxWorks嵌入式实时操作系统和PEX8112桥芯片,设计了一种应用于P2020处理器的PCIE转PCI的接口方案,有效解决了航天航空系统中P2020处理器的PCIE控制器与PCI设备的适配问题。方案结合P2020处理器和PEX8112桥片的特点,详细阐述了P2020处理器的PCIE转PCI的接口方案硬件框架设计和基于VxWorks嵌入式实时操作系统中VxBus框架的软件开发设计。对方案进行验证测试,针对不同的以太网帧长度进行速率测试,当以太网帧长度为1 518字节,可达到1 Gb/s理论数值。测试结果表明,PCIE转PCI接口的数据传输具备高可靠性和高性能的要求。For the P2020 processor does not integrate PCI controllers,designing a PCIE to PCI interface solution based on Vxworks embedded real⁃time operating system and PEX8112 bridge chip.The problem of adapting the PCIE controller of the P2020 processor and the PCI device in the aerospace system is effectively solved by the solution.The scheme combines the features of the P2020 processor and the PEX8112 bridge,and elaborates the design of the system hardware architecture and software development design based on the VxBus framework of the VxWorks embedded real⁃time operating system.The scheme is verified and tested,and the rate test is performed for different Ethernet frame length is 1518 bytes,the theoretical value of 1 Gb/s can be reached.The experimental proved that the PCIE to PCI interface has high reliability and performance requirements for data transmission.

关 键 词：PCIE转PCI P2020 PEX8112 VXWORKS 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]