基于IP Core的PXI Express接口DMA引擎设计

PXI Express是PCI Express在仪器领域的扩展。采用Xilinx公司的PCI Express端点硬核,详细阐述了一种通用DMA引擎的实现方法,对DMA读写操作流程和设计思想进行了详细的分析和说明,并提出了提高DMA引擎数据传输速率的优化方法。分别在硬件层和软件层进行测试,设计的DMA引擎可以达到较高的数据传输速率,为PXI Express接口提供了一种通用的解决方案,可以满足PXI Express系统中对高数据带宽的传输需求,具有很好的应用价值。

Design of DMA engine for PXI Express interface based on IP core

PXI Express is the extention of PCI Express in instrument. A general designing idea of DMA engine is proposed based on the PCI Express hard IP core of Xilinx, and the reading and writing flow of DMA opration is analyzed in detail. Furthermore an optimized algorithm which can accelerate the DMA transmission speed is proposed. Test is implemented in both hardware and software level,and the transmission speed of DMA engine can reach up to a high speed, which provides a general resolution for PXI Express interface, meeting the demand of high data bandwidth of PXI Express system with good application value.