基于PCIe总线的双路1394B接口模块设计与实现

Design and implementation of dual channel 1394B interface module based on PCIe bus

摘要:

为了满足航电系统中前端传感器捕获的图形图像数据实时传输的需求，设计并实现了基于PCIe总线的双路1394B接口模块。该模块通过PCIe接口与主机交互，采用S400β传输模式，软件设计符合标准OHCI规范，支持AS5643协议，异步流包数据收发采用链式队列管理，主机与1394B控制器之间通过DMA操作，实现大数据块的并行处理，两路1394B相互独立，显著提升数据传输性能。测试验证结果表明，该模块具备带宽高、可靠性高、CPU资源占用率低等特点，已在某项目获得成功应用，实现了图形图像数据的实时传输，满足系统设计要求，表现出了良好的稳定性和适应性，具有实践应用价值。

Abstract:

In order to meet the demand of real-time data transmission of avionics system. Design and implementation of a PCIe bus based on the dual 1394B interface module, the module through the PCIe bus interconnection with the host ,using the S400β transmission mode. With its high bandwidth, low cost, high reliability, CPU resource occupancy rate low characteristic, has been successfully used in a avionics system, reflects the reliability and adaptability of the good, to achieve real-time transmission of data, has practical application value.