FPGA XDMA中断模式PCIE测速例程：XDMA中断模块驱动交互与AXI-BRAM读写访问测试,FPGA XDMA中断模式下的PCIE测速例程：基于Xilinx XDMA方案与QT上位机的数据交互
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FPGA XDMA中断模式PCIE测速例程：XDMA中断模块驱动交互与AXI-BRAM读写访问测试,FPGA XDMA中断模式下的PCIE测速例程：基于Xilinx XDMA方案与QT上位机的数据交互实现,FPGA XDMA 中断模式的PCIE测速例程本设计使用Xilinx官方的XDMA方案搭建基于Xilinx系列FPGA的PCIE通信平台，使用XDMA的中断模式与QT上位机通讯，即QT上位机通过软件中断的方式实现与FPGA的数据交互；本设计的关键在于我们编写了一个 xdma_inter.v 的XDMA中断模块。该模块用来配合驱动处理中断，xdma_inter.v 提供了AXI-LITE 接口，上位机通过访问 user 空间地址读写 xdma_inter.v 的寄存器。该 模块 在 user_irq_req_i 输入的中断位，寄存中断位号，并且输出给 XDMA IP ，当上位机的驱动响应中断的时候，在中断里面写 xdma_inter.v 的寄存器，清除已经处理的中断。另外本方案中通过 AXI-BRAM 来演示用户 user 空间的读写访问测试。,FPGA; XDMA; 中 <link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90401626/2/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90401626/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">FPGA XDMA <span class="ff2">中断模式的<span class="_ _0"> </span></span>PCIE<span class="_ _1"> </span><span class="ff2">测速例程</span></div><div class="t m0 x1 h2 y2 ff2 fs0 fc0 sc0 ls0 ws0">引言</div><div class="t m0 x1 h2 y3 ff2 fs0 fc0 sc0 ls0 ws0">随着科技的不断发展<span class="ff3">，<span class="ff1">FPGA</span>（<span class="ff1">Field Programmable Gate Array</span>）</span>逐渐成为创新和解决复杂问</div><div class="t m0 x1 h2 y4 ff2 fs0 fc0 sc0 ls0 ws0">题的重要工具<span class="ff4">。</span>而在<span class="_ _0"> </span><span class="ff1">FPGA<span class="_ _1"> </span></span>开发中<span class="ff3">，</span>高速通信是一个关键的技术需求<span class="ff4">。</span>本文将介绍一种基于<span class="_ _0"> </span><span class="ff1">Xilinx</span></div><div class="t m0 x1 h2 y5 ff2 fs0 fc0 sc0 ls0 ws0">系列<span class="_ _0"> </span><span class="ff1">FPGA<span class="_ _1"> </span></span>的<span class="_ _0"> </span><span class="ff1">PCIE<span class="_ _1"> </span></span>通信平台<span class="ff3">，</span>该平台利用<span class="_ _0"> </span><span class="ff1">Xilinx<span class="_ _1"> </span></span>官方提供的<span class="_ _0"> </span><span class="ff1">XDMA<span class="_ _1"> </span></span>方案<span class="ff3">，</span>通过中断模式实现与<span class="_ _0"> </span><span class="ff1">QT</span></div><div class="t m0 x1 h2 y6 ff2 fs0 fc0 sc0 ls0 ws0">上位机的数据交互<span class="ff4">。</span></div><div class="t m0 x1 h2 y7 ff2 fs0 fc0 sc0 ls0 ws0">一<span class="ff4">、</span>设计概述</div><div class="t m0 x1 h2 y8 ff2 fs0 fc0 sc0 ls0 ws0">本设计利用<span class="_ _0"> </span><span class="ff1">Xilinx<span class="_ _1"> </span></span>官方的<span class="_ _0"> </span><span class="ff1">XDMA<span class="_ _1"> </span></span>方案构建了一个基于<span class="_ _0"> </span><span class="ff1">Xilinx<span class="_ _1"> </span></span>系列<span class="_ _0"> </span><span class="ff1">FPGA<span class="_ _1"> </span></span>的<span class="_ _0"> </span><span class="ff1">PCIE<span class="_ _1"> </span></span>通信平台<span class="ff4">。</span>该平</div><div class="t m0 x1 h2 y9 ff2 fs0 fc0 sc0 ls0 ws0">台通过中断模式与<span class="_ _0"> </span><span class="ff1">QT<span class="_ _1"> </span></span>上位机进行通信<span class="ff3">，</span>即<span class="_ _0"> </span><span class="ff1">QT<span class="_ _1"> </span></span>上位机通过软件中断的方式与<span class="_ _0"> </span><span class="ff1">FPGA<span class="_ _1"> </span></span>进行数据交互<span class="ff4">。</span>设</div><div class="t m0 x1 h2 ya ff2 fs0 fc0 sc0 ls0 ws0">计的关键在于编写了一个名为<span class="_ _0"> </span><span class="ff1">xdma_inter.v<span class="_ _1"> </span></span>的<span class="_ _0"> </span><span class="ff1">XDMA<span class="_ _1"> </span></span>中断模块<span class="ff4">。</span></div><div class="t m0 x1 h2 yb ff2 fs0 fc0 sc0 ls0 ws0">二<span class="ff4">、<span class="ff1">xdma_inter.v<span class="_ _1"> </span></span></span>模块设计与功能</div><div class="t m0 x1 h2 yc ff1 fs0 fc0 sc0 ls0 ws0">xdma_inter.v<span class="_ _1"> </span><span class="ff2">模块是为配合驱动处理中断而编写的<span class="ff4">。</span>该模块提供了<span class="_ _0"> </span></span>AXI-LITE<span class="_ _1"> </span><span class="ff2">接口<span class="ff3">，</span>上位机可以</span></div><div class="t m0 x1 h2 yd ff2 fs0 fc0 sc0 ls0 ws0">通过访问用户空间地址来读写<span class="_ _0"> </span><span class="ff1">xdma_inter.v<span class="_ _1"> </span></span>的寄存器<span class="ff4">。</span>具体功能如下所述<span class="ff3">：</span></div><div class="t m0 x1 h2 ye ff1 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff2">该模块可以接收来自<span class="_ _0"> </span></span>user_irq_req_i<span class="_ _1"> </span><span class="ff2">输入的中断信号<span class="ff3">，</span>将中断位号存入寄存器<span class="ff3">，</span>并输出给</span></div><div class="t m0 x2 h3 yf ff1 fs0 fc0 sc0 ls0 ws0">XDMA IP<span class="ff4">。</span></div><div class="t m0 x1 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span><span class="ff2">当上位机的驱动程序响应中断时<span class="ff3">，</span>可以在中断程序中写入<span class="_ _0"> </span></span>xdma_inter.v<span class="_ _1"> </span><span class="ff2">的寄存器<span class="ff3">，</span>以清除已</span></div><div class="t m0 x2 h2 y11 ff2 fs0 fc0 sc0 ls0 ws0">处理的中断<span class="ff4">。</span></div><div class="t m0 x1 h2 y12 ff2 fs0 fc0 sc0 ls0 ws0">三<span class="ff4">、</span>用户空间读写访问测试</div><div class="t m0 x1 h2 y13 ff2 fs0 fc0 sc0 ls0 ws0">本方案还通过<span class="_ _0"> </span><span class="ff1">AXI-BRAM<span class="_ _1"> </span></span>来演示用户空间的读写访问测试<span class="ff4">。</span>用户可以通过该测试来验证用户空间地址</div><div class="t m0 x1 h2 y14 ff2 fs0 fc0 sc0 ls0 ws0">的可读写性<span class="ff4">。</span></div><div class="t m0 x1 h2 y15 ff2 fs0 fc0 sc0 ls0 ws0">结论</div><div class="t m0 x1 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">本设计利用<span class="_ _0"> </span><span class="ff1">Xilinx<span class="_ _1"> </span></span>官方的<span class="_ _0"> </span><span class="ff1">XDMA<span class="_ _1"> </span></span>方案搭建了一个基于<span class="_ _0"> </span><span class="ff1">Xilinx<span class="_ _1"> </span></span>系列<span class="_ _0"> </span><span class="ff1">FPGA<span class="_ _1"> </span></span>的<span class="_ _0"> </span><span class="ff1">PCIE<span class="_ _1"> </span></span>通信平台<span class="ff3">，</span>通过</div><div class="t m0 x1 h2 y17 ff2 fs0 fc0 sc0 ls0 ws0">中断模式实现了与<span class="_ _0"> </span><span class="ff1">QT<span class="_ _1"> </span></span>上位机的数据交互<span class="ff4">。</span>通过编写<span class="_ _0"> </span><span class="ff1">xdma_inter.v<span class="_ _1"> </span></span>模块<span class="ff3">，</span>实现了中断的处理和清除</div><div class="t m0 x1 h2 y18 ff2 fs0 fc0 sc0 ls0 ws0">功能<span class="ff4">。</span>此外<span class="ff3">，</span>通过<span class="_ _0"> </span><span class="ff1">AXI-BRAM<span class="_ _1"> </span></span>进行用户空间的读写访问测试<span class="ff3">，</span>验证了用户空间地址的可读写性<span class="ff4">。</span></div><div class="t m0 x1 h2 y19 ff2 fs0 fc0 sc0 ls0 ws0">参考链接<span class="ff3">：<span class="ff1">[</span></span>详细设计文档<span class="ff1">](http: t.csdn.cn JCYJi)</span></div><div class="t m0 x1 h2 y1a ff2 fs0 fc0 sc0 ls0 ws0">本文简要介绍了一种基于<span class="_ _0"> </span><span class="ff1">Xilinx<span class="_ _1"> </span></span>系列<span class="_ _0"> </span><span class="ff1">FPGA<span class="_ _1"> </span></span>的<span class="_ _0"> </span><span class="ff1">PCIE<span class="_ _1"> </span></span>通信平台<span class="ff3">，</span>该平台利用<span class="_ _0"> </span><span class="ff1">Xilinx<span class="_ _1"> </span></span>官方的<span class="_ _0"> </span><span class="ff1">XDMA</span></div><div class="t m0 x1 h2 y1b ff2 fs0 fc0 sc0 ls0 ws0">方案<span class="ff3">，</span>并通过中断模式实现了与<span class="_ _0"> </span><span class="ff1">QT<span class="_ _1"> </span></span>上位机的数据交互<span class="ff4">。</span>通过详细阐述<span class="_ _0"> </span><span class="ff1">xdma_inter.v<span class="_ _1"> </span></span>模块的设计与</div><div class="t m0 x1 h2 y1c ff2 fs0 fc0 sc0 ls0 ws0">功能<span class="ff3">，</span>读者能够更加深入地了解该设计方案的实现原理<span class="ff4">。</span>同时<span class="ff3">，</span>通过提供待参考的详细设计文档<span class="ff3">，</span>读</div><div class="t m0 x1 h2 y1d ff2 fs0 fc0 sc0 ls0 ws0">者可以深入研究该技术<span class="ff3">，</span>并应用于自己的项目中<span class="ff4">。</span>希望本文对读者在<span class="_ _0"> </span><span class="ff1">FPGA<span class="_ _1"> </span></span>开发中的工作有所帮助<span class="ff4">。</span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>