Xilinx axi cdma CDMACR Register Table 1. 1 English Introduction Features IP Facts Overview Navigating Content by Design Process Core Overview Feature Summary Applications Using a DMA Proxy Driver Hello, I'm trying to understand how to use the DMA. xilinx. It is used by the AXI CDMA to write the data to the DDR system memory. The transfer is cache coherent and when the transfer is complete, the CPU sees the updated OCM without invalidating or flushing the cache This file demonstrates how to use xaxicdma driver on the Xilinx AXI CDMA core (AXICDMA) to transfer packets in simple transfer mode without interrupt. As documented in the AXI Protocol specification, the AxProt signals define the access permission attributes and the AxCache signals define the memory attributes. Admin Note – This thread was edited to update links as a The amount it increments depends on the size of the given burst. Its optional scatter/gather capabilities also offload data movement tasks from the Central Processing Unit (CPU). This guide, along with documentation related to all products that aid in the design process, can be found on the AMD Adaptive Support web page or by using the AMD Adaptive Computing Documentation Navigator. Integrating AXI CDMA with the Zynq SoC PS HP Slave Port Xilinx® Zynq®-7000 SoC devices internally provide four high performance (HP) AXI slave interface ports that connect the programmable logic (PL) to asynchronous FIFO interface (AFI) blocks in the processing system (PS). There's a couple of possible solutions to this problem. The AXI CDMA provides high-bandwidth Direct Memory Access (DMA) between a memory-mapped source address and a memory-mapped destination address using the AXI4 protocol. I'm leaning more towards a hardware config issue. Download the Documentation Navigator from the D The AXI MCDMA core is a soft Xilinx IP core for use with the Xilinx Vivado® Design Suite. The transfer is cache coherent and when the transfer is complete, the CPU sees the updated OCM without invalidating or flushing the cache DMA enabled Zynq PS-PL communication to implement high throughput data transfer between Linux applications and user IP core. Sep 11, 2024 · AXI Registers have addresses, hence the CDMA can be used. <p></p><p></p>I have a custom IP, named GP_Filter_Accelerator, with an AXI Full interface on port S01 and a Zynq PS which are connected in a block diagram. * * @file xaxicdma_example_simple_intr. Feb 20, 2023 · This example design allocates 4K of block RAM attached to the CPU via M_AXI_GP0. The AXI CDMA provides high-bandwidth Direct Memory Access (DMA) between a memory-mapped source address and a memory-mapped destination address using the AXI4 protocol. There's also this baremetal driver on our wiki that has example applications to help you get started with it: https://xilinx-wiki. This example design allocates 4K of block RAM attached to the CPU via M_AXI_GP0. (based on Xilinx UG873 chapter 6) This is a simple loop-back project in which data transfer between host OS (Zynq-PS) and FPGA (Zynq-PL) is done using DMA mechanism. Weclome to Green-ElectronsDesigning with AXI Multi-Channel DMA with Scatter-Gather data transfer and using it under Linux This package shows you how to use AXI Multi-channel DMA in Vivado and how to use it under Linux. The CDMA in simple mode is transferring data from the block RAM to the OCM via ACP port. CDMACR Register Details Bits Field Name Default Value Access Type CDMA Mode Used Description 31 to 24 IRQDelay 00h R/W SG Interrupt Delay Timeout. c * * This file demonstrates how to use xaxicdma driver on the Xilinx AXI * CDMA core (AXICDMA) to transfer packets in simple transfer mode without Here is a list of all documented files with brief descriptions: The official Linux kernel from Xilinx. The AXI Video Direct Memory Access (AXI VDMA) core is a soft AMD IP core that provides high-bandwidth direct memory access between memory and AXI4-Stream type video target peripherals. Add and connect the CDMA controller in the programmable logic. For details, see xaxicdma_example_hybrid_intr. AXI CDMA为嵌入式系统提供了高性能的片上互联 The AXI CDMA provides high-bandwidth Direct Memory Access (DMA) between a memory-mapped source address and a memory-mapped destination address using the AXI4 protocol. Xilinx AXI DMA engine, it does transfers between memory and AXI4 stream target devices. Driver Information There are a number of drivers in the kernel tree due to history and they may work, but the following * * @file xaxicdma_example_simple_poll. I have the following PL schematic where the yellow bus is going to the interconnect for AXI configuration. To test this, I am working through the simple poll example but I am not having success. The example initialises the AXI PCIe IP, shows how to enumerate the PCIe system and transfer data between endpoint and root complex using Central DMA. It can be configured to have one channel or two Master DMA on Xilinx SoCs: AXI, CDMA, VDMA, Linux drivers, memory management & Python integration Hi @dileepkumueep0 The ZynqMP DMA proposed by @patocarr@tu9 is a DMA in PS, so there is no need IP. Table of Contents The linux test is performed from the command prompt using the Linux DMA Test driver in a similar way that is documented in the Xilinx Linux Soft DMA Driver wiki page that documents the AXI CDMA IP driver for Linux. c里的xilinx_dma_probe函数打印的信息，既然probe函数已经执行，是否说明驱动已正常加载了？ 只是内核还是oops 没有操作系统的standalone应用正常，说明硬件连接没有问题 May 27, 2022 · 文章浏览阅读2. h" file. This driver gives the implementation to the necessary functions in the DMA engine framework. The AXI general purpose (GP) port will be used with an AXI lite interface to configure the CDMA. Table of Contents Jan 19, 2022 · The framework is designed to work with many different forms of DMA including memory to memory such as the AXI CDMA and memory to device / device to memory for the AXI DMA. Boot Mode: JTAG, SD BLOCK DIAGRAM image2020-3-8_9-58-25. An optional Scatter Gather (SG) feature can be used to offload control and sequencing tasks from the system CPU The Xilinx LogiCORETM IP AXI Central Direct Memory Access (CDMA) core is a soft Xilinx Intellectual Property (IP) core for use with the Vivado® Design Suite. An optional Scatter Gather (SG) feature can be used to offload control and sequencing tasks from thesystem CPU. The default files in the repo are meant for a 1 channel design, however, they’re intended to be modified to allow for more channels. 2。 Zynq UltraScale+ RFSoC ZCU111 评估板 UG1165 Chapter 5: AXI CDMA - Vitis Missing xaxicdma. May 23, 2025 · 本文介绍了如何在Vivado 2017. It also shows how to use AXI DMA in SG mode. The block diagram for the system is as shown in the following figure. Jul 11, 2025 · This product guide is the main document associated with the core. This example assumes that there is an AXI CDMA IP in the system. The orange bus is directly connected to a HP port on the Zynq. My starting reference was Xilinx example (link) for QUAD SPI IP core throughput performance measurement. To see the debug print, you need a Uart16550 or uartlite in your system, and please set "-DDEBUG" in your compiler options for the example, also comment out the "# Aug 11, 2022 · The paper discusses the impact of single-event effects (SEEs) induced by radiation in an advanced extensible interface (AXI) central direct memory access (CDMA) core based on 28 nm Xilinx ZYNQ-7000 FPGA. Sep 23, 2021 · The purpose of this article is to provide applications engineers with examples of how to use the AXI DMA core in a system. To see the debug print, you need a Uart16550 or uartlite in your system This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. Table of Contents This hands-on workshop is designed for embedded engineers, FPGA developers, and Linux system integrators who want to master the use of Xilinx DMA IP cores on Zynq-7000 and Zynq Ultrascale+ platforms. It sits as an intermediary between an AXI Memory-Mapped embedded subsystem an AXI Streaming subsystem. It contains the fo I have already worked with AXI DMA and AXI UART. Table of Contents This file demonstrates how to use xaxicdma driver on the Xilinx AXI CDMA core (AXICDMA) to transfer packets in hybrid transfer mode without interrupt. Jan 19, 2022 · The framework is designed to work with many different forms of DMA including memory to memory such as the AXI CDMA and memory to device / device to memory for the AXI DMA. This application mimics a Xilinx project, UG1165, but tar-gets the Zedboard instead of the Xilinx Evaluation Board, XC702. Initialization, status, interrupt and management registers are accessed through an AXI4 May 22, 2025 · XAPP1171和AXI-CDMA使用仿真_xilinx cdma-CSDN博客 在学习初期，搞不懂如何去搭建一个DMA系统，搞不懂这些IP分别有什么作用，搞不懂里面复杂的地址分配问题。 * * @file xaxicdma_example_hybrid_intr. This is, of course, easier said than done--especially if you don't know where the problem is. Perform DMA operation between various memories. APPLICABLE PLATFORMS Vivado and PetaLinux 2019. But I don't know how the interrupt of AXI UART is connected to the AXI DMA. The current design uses a PL-based CDMA to write and read data to/from the DDR via the high performance (HP) AXI ports. Sep 18, 2025 · 本文是Xilinx AXI Central Direct Memory Access (CDMA)手册的笔记，介绍了CDMA的内部框架、接口作用以及Simple DMA和Scatter Gather模式的操作步骤。在Simple DMA模式中，CDMA在外部AXI4主机配置后执行单次DMA操作，而在Scatter Gather模式下，CDMA通过传输描述符链处理多个数据块。CDMA还支持循环模式，实现连续数据传输 PS : There is already an underlying device driver namely xilinx_dma. Transfer data to executable memory can crash the system. Contribute to Xilinx/embeddedsw development by creating an account on GitHub. png System Specifics Zynq-7000 Processing System (ZC706 design only) MIG AXI DDR3 Memory Controller (KC705 design only) AXI Memory Mapped to PC I Express (AXI PCI Express) AXI Central Direct Memory Access (CDMA) AXI Interface Block RAM Controller Block Memory Generator AXI4 Interconnect Processor System Reset The AXI MCDMA facilitates large data migration, offloading the task from the embedded processor. Jun 17, 2022 · DMA是direct memory access，在FPGA系统中，常用的几种DMA需求： 1、 在PL内部无PS（CPU这里统一称为PS）持续干预搬移数据，常见的接口形态为AXIS与AXI，AXI与AXI； 2、 从PL与PS之间搬移数据，对于ZYNQ就比较好理解，属于单个芯片内部接口，对于PCI This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. In this system, a AXI CDMA instance acts as a master device to copy an array of the data from the source buffer location to the destination buffer location in the DDR system memory. Fix your code. Introduction The AXI DMA core is a soft Xilinx IP core for use with the Xilinx Vivado® Design Suite. In this system, a AXI CDMA instance acts as a master device to copy an array of the data from the source buffer location to the destination buffer location in th This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. h I am trying to complete the example in Chapter 5 of UG1165. 1 4 PG034 April 4, 2018 www. The drivers included in the kernel tree are intended to run on the ARM (Zynq, Ultrascale+ MPSoC, Versal) and MicroBlaze Linux. In this example all of those components This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. The DMA enabled Zynq PS-PL communication to implement high throughput data transfer between Linux applications and user IP core. The AXI DMA provides high-bandwidth direct memory access between memory and AXI4-Stream target peripherals. dtsi is modified as shown below. Jul 11, 2025 · This register provides software application control of the AXI CDMA. The AXI CDMA provides high-bandwidth direct memory access (DMA) between a memory mapped source address and a memory mapped destination address using the AXI4 protocol. This blog entry will show you how to create an AXI CDMA Linux userspace example application. I suspect that there is something wrong in the device tree Apr 12, 2019 · The AXI Video Direct Memory Access (AXI VDMA) core is a soft Xilinx IP core that provides high-bandwidth direct memory access between memory and AXI4-Stream type video target peripherals. I also have a BRAM connected for SG use, but I am not trying that yet. c. This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. The core provides efficient two dimensional DMA operations with independent asynchronous read and write channel operation. The AXI CDMA provides high-bandwidth Direct Memory Access (DMA) between a memory-mapped source address and a memory-mapped destination address using the AXI4 protoco Integrating AXI CDMA with the Zynq SoC PS HP Slave Port Xilinx Zynq®-7000 SoC devices internally provide four high performance (HP) AXI slave interface ports that connect the programmable logic (PL) to asynchronous FIFO interface (AFI) blocks in the processing system (PS). Jul 11, 2025 · It provides high-bandwidth direct memory access (DMA) between a memory-mapped source address and a memory-mapped destination address using the AXI4 protocol. AXI CDMA Linux user space example on Zynq UltraScale\+ RFSoC Thank you. I'm struggling for a long time to figure out how to make a usable system with DDR, QUAD SPI, Ethernet Lite and CDMA IP cores together. Because AXI CDMA is supported AXI4-Lite. The user configures the details of Xilinx AXI VDMA engine, it does transfers between memory and video devices. The AXI CDMA IP provides a high bandwidth Direct Memory Access between a memory-mapped source address and a memory-mapped destination address using the AXI4 protocol. Table of Contents Feb 6, 2023 · 使用 AMD-Xilinx FPGA设计一个全连接DNN核心现在比较容易（Vitis AI），但是利用这个核心在 DNN 计算中使用它是另一回事。本项目主要是设计AI加速器，利用Xilinx的CDMA加载权重，输入到PL区的Block Ram。 原理框图 Sep 12, 2024 · 这期间也遇到并解决了不少问题，在Xilinx论坛也获得了不少帮助。 现在有个问题是，我发现Xilinx的PCIe使用方式有多种，比如类似xapp1052的BMD模式、XDMA方式，甚至还有其它比如CDMA方式。 Integrating AXI CDMA with the Zynq SoC PS HP Slave Port Xilinx® Zynq®-7000 SoC devices internally provide four high performance (HP) AXI slave interface ports that connect the programmable logic (PL) to asynchronous FIFO interface (AFI) blocks in the processing system (PS). <p></p><p></p>I believe my block diagram will allow the transfer. 2. Lite mode. The transfer is cache coherent and when the transfer is complete, the CPU sees the updated OCM without invalidating or flushing the cache Explains Linux DMA from user space, focusing on efficient data transfer between user and kernel space for Xilinx devices. Table of Contents This file demonstrates how to use the xaxicdma driver on the Xilinx AXI CDMA core (AXICDMA) to transfer packets in simple transfer mode through interrupt. The AXI CMDA core is a soft Xilinx IP core for use with the Xilinx Vivado® Design Suite. Sep 23, 2021 · The attached Vivado design and source code shows how to implement coherent transfers in a bare metal design using the AXI CDMA IP in simple mode. Using the simple DMA transfer has the advantage of ease of use comparing to SG DMA transfer. Referenced by XAxiCdma_BdRingCreate (), XAxiCdma_BdRingNext (), and XAxiCdma_BdRingPrev (). This example assumes that the system has an interrupt controller. If configured as two channels, one is to transmit to the video device and another is to receive from the video device. Using polling mode can give better performance on an idle system, where the DMA engine is lowly loaded, and the application has nothing else to do. 4环境下使用Xilinx AXI Central DMA (CDMA) IP核进行数据搬移的仿真。通过配置CDMA的控制寄存器，设置Scatter-Gather模式，并利用描述符表实现内存间的数据传输。此外，还提及了对Xilinx官方开发板KC705上的XAPP1171项目的分析。 Feb 21, 2023 · 本篇博文将为您演示如何创建 AXI CDMA Linux 用户空间应用示例。 示例设计将在 Zynq UltraScale+ RFSoC ZCU111 评估板上实现通过 AXI CDMA 把数据从 PS DDR 传输至 AXI BRAM。 此文是笔者记录的 AXI Central Direct Memory Access (CDMA）相关学习笔记及参考例程仿真说明。 仿真环境 win10 64bit vivado 2017. It depends on your requirements, for an example of using DMA IP for PL, the following blog will be helpful. Jun 29, 2020 · 本文转载自： XILINX技术社区微信公众号 本篇博文将为您演示如何创建 AXI CDMA Linux 用户空间示例应用。 示例设计将在 Zynq UltraScale+ RFSoC ZCU111 评估板上实现通过 AXI CDMA 把数据从 PS DDR 传输至 AXI BRAM。 适用平台 Vivado 和 PetaLinux 2019. An optional Scatter Gather (SG) feature can be used to offload control and sequencing tasks from the system CPU The PS does some calculations on the data and then I need to send this data back to the PL to a static memory. Table of Contents For memory to memory transfers, CDMA might be more useful. Table of Contents Nov 12, 2024 · In this chapter, you will instantiate AXI CDMA (Central DMA) IP in fabric and integrate it with the processing system high performance (HP) 64-bit slave port. There are three transfers: a simple transfer, a sg transfer, and another simple transfer. c in the petalinux kernel. c source file, I cannot build the project because Vitis cannot find the "xaxicdma. The HP ports enable a high throughput data path between AXI masters in the programmable logic and the processing system High Level Systhesis Design FlowDirect Memory Access using CDMA Objectives After completing this lab, you will be able to: Enable a High Performance (HP) port of the processing system. xaxicdma_example_hybrid_intr. It shows how to create and use descriptors and how to perform descriptor based data transfers. May 28, 2025 · This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. Table of Contents We would like to show you a description here but the site won’t allow us. xaxicdma_example_hybrid_poll. It can be configured to have one channel or two channels. These modifications expect the user to use 3 TX and 3 TX channels. Jul 11, 2025 · The AMD LogiCORE™ IP AXI Central Direct Memory Access (CDMA) core is a soft AMD Intellectual Property (IP) core for use with the AMD Vivado™ Design Suite. You can refer to the below stated example applications for more details on how to use axicdma driver. The AXI MCDMA provides high-bandwidth direct memory access between memory and AXI4-Stream target peripherals. The package comes with an additional Aug 5, 2023 · In this tutorial, I created an example application in Vivado and Vitis, in which I utilized a loop-back connected Xilinx AXI-Stream FIFO IP and an ILA to monitor AXI-Stream transfers. Device Tree In a PetaLinux project, the system-user. It coordinates DataMover command loading and status retrieval and updates it back to the Register Module. The HP ports enable a high throughput data path between AXI masters in the programmable logic and the processing system The CDMA fails with an error status of 0x40 which means it has a decode error in the address. Xilinx's demo AXI applications (both AXI and AXI-lite) were all broken last I checked. The completion of the transfer is checked through polling. AXI Multi-Channel DMA (with Scatter-Gather data transfer) and using it under Linux Educational package, containing example designs, hardware and software source code, videos and support. So, is there any examples of using CDMA with Microblaze? I will be grateful for any useful information because datasheets for CDMA have not enough information. Sep 18, 2025 · CDMA：Central Direct Memory Access，IP核内部框架如下： 从框架图可以看出： S_AXI-Lite接口用来配置CDMA内部的 寄存器 ，M_AXI接口用来搬运数据，M_AXI_SG接口一般与Bram连接，用来存储描述符。cdma_introut表示中断输出，一般用于DMA传输完成标志。 s_axi_lite_aclk时钟应该小于等于m_axi_aclk。 s_axi_lite_aresetn低电平复位 Nov 13, 2024 · Describes a soft AMD IP core for use with the AMD Vivado Design Suite. During the boot-up of the OS on the board I am able to see a print message from within this driver saying the CDMA device was successfully probed. Introduction The AXI CMDA core is a soft Xilinx IP core for use with the Xilinx Vivado® Design Suite. The polling mode can yield better turn This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. My idea is to use CDMA IP Core to transfer data as fast as possible from the SPI flash over the Ethernet to the PC. An optional Scatter Gather (SG) feature can be used to offload control and sequencing tasks from the system CPU. As opposed to an AXI4-Stream, which has no addresses, it's just an (AXI) data stream. net/wiki/spaces/A/pages/18842291/AXI+CDMA+Standalone+Driver Sep 6, 2020 · 本文详细介绍了使用Xilinx ZYNQ7000 SoC进行CDMA DMA数据传输的过程，包括Vivado和Vitis环境配置、XSA文件生成、AXI CDMA中断设置及APP编写。通过实例演示了如何在DDR内存间进行数据搬运，重点讲解了HP接口配置、中断处理及DMA传输控制。 Introduction The AXI CMDA core is a soft Xilinx IP core for use with the Xilinx Vivado® Design Suite. 注：本文转自赛灵思中文社区论坛，源文链接 在此。本文原作者为XILINX工程师。以下为个人译文，仅供个人学习记录参考之用，如有疏漏之处，还请不吝赐教。 本篇博文将为您演示如何创建 AXI CDMA Linux 用户空间示… Linux Drivers This page is intended to give more details on the Xilinx drivers for Linux, such as testing, how to use the drivers, known issues, etc. It also supports scatter gather. 7k次。本文深入解析CDMA核的内部架构及其工作原理，包括S_AXI-Lite和M_AXI接口的功能，不同模式下的操作步骤，并提供了传输描述符的定义及示例。 This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. Download the Documentation Navigator from the D Jan 17, 2012 · The AXI Central Direct Memory Access (AXI CDMA) core is a soft Xilinx IP core for use with the Xilinx Embedded Development Kit (EDK). The core supports both a simple CDMA operation mode and an optional Scatter Gather mode. AXI CDMA is used with memory mapped to memory mapped devices I didnt understand these sentences,could someone explain what this mean? What is a difference? Aligned transfer is in respect to word length, and word length is defined through the building parameter XPAR_AXI_CDMA_0_M_AXI_DATA_WIDTH. . Don't forget to Reply, Kudo, and Accept as Solution. To save hardware resources (drastically), you may select "lite" mode build of the hardware. Modify the NUMBER_OF_TRANSFER constant to have different number of simple transfers done in this test. This value is used for setting the interrupt delay timeout value. Jul 11, 2025 · This block manages overall CDMA operation. Oct 18, 2024 · The Xilinx LogiCORE™ IP AXI Central Direct Memory Access (CDMA) core is a soft Xilinx Intellectual Property (IP) core for use with the Vivado® Design Suite. Table of Contents The official Linux kernel from Xilinx. c * * This file demonstrates how to use xaxicdma driver on the Xilinx AXI * CDMA core (AXICDMA) to transfer packets in hybrid transfer mode through If your device makes one little AXI mistake, the DMA will hang. The programming steps for the CDMA can be found in PG034 for the IP. The user configures the details of Sep 23, 2021 · Attached to this Answer Record is an Example Design to show how to use the Zynq UltraScale+ MPSoC Verification IP (VIP) master and slave ports to simulate a DMA transfer with the AXI CDMA IP. Xilinx Embedded Software (embeddedsw) Development. I wanted to follow the approach shown in the video from Xilinx Video Lounge "Linux DMA in Device Drivers": creating a proxy driver in kernel space that is layered on the dma engine which, in turn, utilizes the proper AXI driver (CDMA,DMA,VDMA) by xilinx. An optional Scatter Gather (SG) feature can be used to offload control and sequencing tasks from the system CPU This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze. The following figure shows the functional composition of the AXI CDMA. Jul 29, 2025 · In this section, you will create a design using AXI CDMA intellectual property (IP) as master in fabric and integrate it with the PS HP 64 bit slave port. com Product SpecificationIntroduction The Xilinx LogiCORE™ IP AXI Central Direct Memory Access (CDMA) core is a soft Xilinx Intellectual Property (IP) core for use with the Vivado® Design Suite. Memory range of the transfer addresses. 0 article. Minimum byte alignment requirement for descriptors to satisfy both hardware/software needs. For more information, please refer to the AXI DMA product page which The AXI Direct Memory Access (AXI DMA) IP core provides high-bandwidth direct memory access between AXI4 and AXI4-Stream IP interfaces. What are your data widths of CDMA, AXI Interconnect, and HP port? Can you try setting them all to 64 as a test (to avoid data resizing), but make sure to leave CDMA address width at 32? Expand Post Like LikedUnlike cholyoake (Member) Sep 24, 2025 · 本文详细介绍了ZYNQ-7000 SoC中AXI CDMA的功能特性，包括独立的AXI4-Lite接口、固定32位数据宽度、 Scatter/Gather模式等。AXI CDMA提供高性能DMA，支持Simple DMA和Scatter Gather自动化模式。在PS端配置中，讲解了Simple DMA和Scatter Gather模式的步骤，以及中断和寄存器设置。 Sep 23, 2020 · AXI-VDMA：实现从 PS 内存到 PL 高速传输高速通道 AXI-HP<---->AXI-Stream 的转换，只不过是专门针对视频、图像等二维数据的。 Overview This file demonstrates how to use xaxicdma driver on the Xilinx AXI CDMA core (AXICDMA) to transfer packets in hybrid transfer mode through interrupt. 1 English - Provides high-bandwidth direct memory access between memory and AXI4-Stream-type target peripherals. The Xilinx LogiCORETM IP AXI Central Direct Memory Access (CDMA) core is a soft Xilinx Intellectual Property (IP) core for use with the Vivado® Design Suite. If your device makes one little AXI mistake, the DMA will hang. I have the CDMA M_AXI connected to both the PS_Zynq S_AXI_HPO port, and the BRAM I want to read from. Table of Contents Jul 11, 2025 · This product guide is the main document associated with the core. The CPU initializes the block RAM. This project instantiates an AXI CDMA IP in PL and integrates it with the processing system high Oct 16, 2012 · The Advanced eXtensible Interface Central Direct Memory Access (AXI CDMA) core is a soft Xilinx Intellectual Property (IP) core for use with the Xilinx Embedded Development Kit (EDK). Jan 21, 2017 · The CDMA controller will move data through axi_mem_intercon in order to take the transaction data from hp3 on M01_AXI, and send it through M00_AXI to the BRAM Controller The BRAM controller will take in the AXI-4 input and convert that to the appropriate BRAM port to write the data into the BRAM generated by blk_mem_gen_0 This file demonstrates how to use the xaxicdma driver on the Xilinx AXI CDMA core (AXICDMA) to transfer packets in scatter gather transfer mode through interrupt. The AXI CDMA uses the processing system HP slave port to get read/write access to the DDR system memory. Jul 11, 2025 · The AXI CDMA is designed to provide a centralized DMA function for use in an embedded processing system employing the AXI4 system interfaces. This document contains information about the AXI4 version of the core. Steps Open the Project Start Vivado if necessary and open the lab2 project (lab2. Table of Contents In this chapter, you will instantiate AXI CDMA (Central DMA) IP in fabric and integrate it with the processing system high performance (HP) 64-bit slave port. Figure 1. Oct 24, 2022 · AXI CDMA v4. For an application that only does one DMA transfer at a time, and the DMA engine is exclusively used by this application, simple DMA transfer is sufficient. Jan 17, 2012 · The AXI CDMA provides high-bandwidth direct memory access (DMA) between a memory mapped source address and a memory mapped destination address using the AXI4 protocol. So I can not connect AXI DMA and AXI UART. Zynq UltraScale+ RFSoC ZCU111 Evaluation Kit. The CDMA IP does not provide any control for those signals and they are tied to zero, so AXI GPIO IPs have been added to drive these control signals in the AXI bus. - PG021 Document ID PG021 Release Date 2025-06-24 Version 7. The 配置应该是正确的。 从内核打印的信息看有这句: 而这正是驱动xilinx_dma. atlassian. . 4 modelsim 功能介绍 IP架构 模块分解介绍 Register Module 包含AXI-CDMA的控制及状态寄存器， 接口 AXI-lite ，寄存器列表如下： Scatter/ I want to transfer data from BRAM to Microblaze and back using CDMA, but I don't understand how to connect AXI-bus from Microblaze to the FPGA and how to connect CDMA. An AXI GPIO block is included to provide software control of the AxPROT and AxCACHE lines. c * * This file demonstrates how to use the xaxicdma driver on the Xilinx AXI * CDMA core (AXICDMA) to transfer packets in simple transfer mode through Xilinx Embedded Software (embeddedsw) Development. Contribute to Xilinx/linux-xlnx development by creating an account on GitHub. The attached Vivado design and source code shows how to implement coherent transfers in a bare metal design using the AXI CDMA IP in simple mode. Aug 12, 2021 · I started with AXI DMA and AXI CDMA blocks and found the following description of the difference: AXI DMA is used with streaming devices to memory mapped devices or vice versa. From this, I decided to use AXI CDMA. Use Xilinx's "AXI Firewall". The same block RAM is also accessible by the CDMA. c Contains an Sep 16, 2025 · 本文详细介绍了Xilinx AXI-CDMA的学习笔记，包括IP架构、模块分解和接口说明。通过设置AXI-CDMA的控制寄存器，配置SG模式的Descriptor链表，利用Modelsim进行仿真验证数据传输过程，同时对比AXI4-FULL产生的数据以确保一致性。 Software The same git repo is used in the wiki article as the Linux DMA from User Space 2. c Contains an example on how to use the XAxicdma driver directly. Apr 12, 2019 · The AXI Video Direct Memory Access (AXI VDMA) core is a soft Xilinx IP core that provides high-bandwidth direct memory access between memory and AXI4-Stream type video target peripherals. Sep 23, 2021 · Attached to this Answer Record is an Example Design to show how to use the Zynq UltraScale+ MPSoC Verification IP (VIP) master and slave ports to simulate a DMA transfer with the AXI CDMA IP. After adding the cdma_app. This example shows the usage of the driver to transfer packets in hybrid transfer mode through interrupt. But the AXI DMA is supported the AXI4-stream interface and AXI UART is supported AXI4-Lite. </p><p> </p><p>I decided to send the data to a BRAM using CDMA. Using polling mode can give better performance on an idle system, where the DMA engine is lowly Timed AXI DMA IP Package, containing timed AXI DMA IP along with example designs, hardware and software source code, videos and support. xpr) you created in Introduction The AXI CMDA core is a soft Xilinx IP core for use with the Xilinx Vivado® Design Suite. The HP ports enable a high throughput data path between AXI masters in the programmable logic and the processing system Xilinx Embedded Software (embeddedsw) Development. Table of Contents The AXI PCIe can be configured as a Root Port only on the 7 Series Xilinx FPGA families. The example design will transfer data from the PS DDR to the AXI BRAM through the AXI CDMA on a Zynq UltraScale+ RFSoC ZCU111 Evaluation Kit. Sep 12, 2024 · 这期间也遇到并解决了不少问题，在Xilinx论坛也获得了不少帮助。 现在有个问题是，我发现Xilinx的PCIe使用方式有多种，比如类似xapp1052的BMD模式、XDMA方式，甚至还有其它比如CDMA方式。 Jun 24, 2025 · AXI DMA LogiCORE IP Product Guide (PG021) - 7. The AXI CDMA master port is connected to the PS high performance slave port 2 (S_AXI_HP2). For data transfer between memory-mapped interfaces, Xilinx provides AXI Central Direct Memory Access (AXI CDMA) IP solution: “ The AMD LogiCORE™ IP AXI Central Direct Memory Access (CDMA) core is a soft AMD Intellectual Property (IP) core for use with the Vivado™ Design Suite.