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

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。

In order to meet the needs of the avionics system front-end graphical image sensor to capture real-time data transmission, designed and implemented Dual 1394B bus interface module based on PCIe. The module interacts with the host PCIe interface, using S400β transmission mode, the software design specification standard OHCI support AS5643 protocol to send and receive data using asynchronous stream packet queue management chain between the host controller and 1394B through the DMA operation, and big data parallel processing block, two 1394B independently, significantly improve data transfer performance. Verification test results show that the module has high bandwidth, high reliability, CPU resource consumption rate and other characteristics, have been successfully used in a project, to achieve re- al-time transmission of graphic image data to meet the design requirements of the system, showing good stability and adaptability, have practical value.