Axi dma simple transfer. I have connected it with AXI DMA a...

Axi dma simple transfer. I have connected it with AXI DMA and I'm using simple register mode. I was able to use Xilinx polled mode example as the baremetal application to transfer data. For every one micro second, i get 256 BYTES in 256 clock cycles (Tp = 50 ns). I wanted to use the AXI-DMA as the base for this design but am finding some interesting issues Driver Implementation For a full list of features supported by this IP, please refer to the AXI DMA product page. I have created a simple high level design in Vivado which consists of AXI stream master custom IP and AXI DMA IP core from Xilinx. 4k次，点赞4次，收藏37次。本文详细介绍了Zynq中的DMA控制器使用方法，包括XAxiDma_SimpleTransfer函数的应用及注意事项，以及如何设置DMA传输方向和处理中断程序。通过理解这些内容，能够更好地掌握Zynq DMA控制器的操作。 The ARM controls DMA transfers via GP ports by accessing the AXI DMA core through its AXI Lite interface. The AXI Direct Memory Access (AXI DMA) IP core provides high-bandwidth direct memory access between AXI4 and AXI4-Stream IP interfaces. Hello anyone, I have been trying to get a simple AXI DMA transfer for the PL to PS on my Cora Z7-10 working for a while now. * * To see the debug print, you need a Uart16550 or uartlite in your system, * and please set "-DDEBUG" in your compiler options. To transfer the data I use the XAxiDma_SimpleTransfer ( ) function. The DMA only seems to transfer again if I increase the address with the 前言 DMA(Direct Memory Access，直接存储器访问)是计算机科学中的一种内存访问技术。它允许某些计算机内部的硬件子系统可以独立地直接读写系统内存，而不需中央处理器（ CPU）介入处理。 DMA 是一种快速的数据传送方式，通常用来传送数据量较多的数据块使用 DMA时， CPU Xilinx Embedded Software (embeddedsw) Development. For the purpose of my example, I've connected an AXI Stream I am writing a module to capture sensor data to a fifo then transfer that via a AXI stream to a AXI_DMA IP block to fill up a DDR. I have configured AXI DMA to use the read channel and disable the write channel. You are missing the connection between the ps axi master and the axilite interface on the dma. They are pulling data from an analog to digital converter (ADC) using AXI Stream, performing some basic processing in the processor after the data has been buffered in DDR, then shooting it back out to a digital to analog converter (DAC) using a separate DMA. The current version of this design was created in Vivado 2015. However, now I'm trying the reverse, i. AXI DMA用于传输的函数XAxiDma_SimpleTransfer ()，代码先锋网，一个为软件开发程序员提供代码片段和技术文章聚合的网站。 System ILA is used to provide additional visibility of the connections between AXI Proxy and PL-PS ports on the Zynq UltraScale+ MPSoC block. Jun 25, 2025 · This blog will walk you through the process of configuring AXI Direct Memory Access (DMA) in Vivado for both Memory Mapped to Stream (MM2S) and Stream to Memory Mapped (S2MM) modes. 2. . ° AXI4-Lite is a light-weight, single transaction memory mapped interface. c File Reference Overview This file demonstrates how to use the xaxidma driver on the Xilinx AXI DMA core (AXIDMA) to transfer packets. I held 'tvalid' of my source low until several seconds after the DMA core was programmed and only then started the transfer. 1 as the design tools. This driver supports the following features: Scatter-Gather DMA (SGDMA) Simple DMA Interrupts Programmable interrupt coalescing for SGDMA APIs to manage Buffer Descriptors (BD) movement to and from the SGDMA engine Simple DMA Simple DMA allows the application to define a single Simple C snippet to transfer DMA memory with scatter/gather on a Zynq 7020 - OpenDGPS/zynq-axi-dma-sg 文章浏览阅读6. The problem is there is always missing data between two simple transfers. That's what I'd do. Features The AXI DMA Standalone driver supports the following features: Simple DMA mode Scatter/Gather Direct Memory Access (DMA) multi-channel operation (up to 16 channels) 64-bit Addressing Key Hole Feature Optional Data Re-Alignment Feature Known Issues and Limitations The 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. I followed some examples and I already managed to make a big S2MM (stream to memory-mapped) transfer via an AXI DMA. Recently I have tried incorporating the Microblaze in to my design just to familiarize myself with it. 文章浏览阅读3. It outputs an AXI Stream consisting of 4096 32-bit values and asserts TLAST when done. c code from GitHub in Vitis. I do not have a processor or PS to control the system and have to use vhdl state machine to do this. Works from userspace. This list of instructions is organized into what is referred to as a descriptor chain. e. Direct Register Mode (Scatter Gather Engine is disabled) provides a configuration for doing simple DMA transfers on MM2S and S2MM channels that requires less FPGA resource utilization. Features The AXI DMA Standalone driver supports the following features: Simple DMA mode Scatter/Gather Direct Memory Access (DMA) multi-channel operation (up to 16 channels) 64-bit Addressing Key Hole Feature Optional Data Re-Alignment Feature Known Issues and Limitations The In the AXI DMA, both the scatter-gather option and data realignment engine are enabled for the S2MM and MM2S paths. The problem I have is that I cannot transfer data to the same location in the ddr memory twice. in interrupt mode when the AXIDMA core is configured in simple mode. The streaming interface of the AXI DMA is connected to the AXI Ethernet subsystem. The DMA only seems to transfer again if I increase the address with the offset of the previous transferlength. to make a simple MM2S transfer to a v A zero-copy Linux driver and a userspace interface library for Xilinx's AXI DMA and VDMA IP blocks. Transfers are initiated by accessing the DMACR, the Source or Destination Address and the Length registers. From the diagram you shared, it seems that you are using the AXI4-Stream Subset Converter to insert the TLAST signal. 文章浏览阅读2. Contribute to Xilinx/embeddedsw development by creating an account on GitHub. Each simple transfer waits for the interrupt from the previous transfer. I have designed hardware using the Axi DMA IP provided by Xilinx, and I am trying to use the DMA Simple transfer function in Simple mode. Maybe someone here can help shed some light on what I may be doing or not doing that's causing me problems. It uses simple polling of the status register to manage DMA transfers. With IRQ Driver is not necessary. This code assumes a loopback hardware widget is connected to the AXI DMA core for data packet loopback. From the File menu, select New->Application Project. Anyway, can you post a snippet of your code that is setting up the transfers? How are you setting the s2mm_length register? Hi, I have been familiarizing myself with VHDL and FPGAs in general with the Digilent Basys3 board. According to the description, this function does one simple transfer submission and needs: * @param InstancePtr is the pointer to the driver instance * @param BuffAddr is the address of the source/destination buffer * @param Length is the length of the transfer * @param Direction is DMA transfer direction, valid values are * - XAXIDMA_DMA_TO This page provides information on the Linux Soft DMA driver, including its features, usage, and implementation details. Performs loopback AXI simple DMA transfer under petalinux. @hbucherry@0. In a previous tutorial I went through how to use the AXI DMA Engine in EDK, now I’ll show you how to use the AXI DMA in Vivado. The AXI Ethernet subsystem has full checksum offloading (CSO) enabled and has FIFO depths of 32K to support jumbo frame transfers. AXI, which means A dvanced e X tensible I nterface, is an interface protocol defined by ARM as par of the AMBA (Advanced Microcontroller Bus Architecture) standard. For DMA, . This stream is connected to an AXI DMA in the following configuration: This DMA should then transfer the data via Interconnect to the AXI BRAM Controller. - PG021 The other one, the DMA_1, will be used to configure the xFFT. For more details about the design, refer to the dma_ex_polled/doc directory. GIF our issue occurs when the m_axis_mm2s_tready de-asserted for long time ,when we try to stop reading from the streamFIFO and start DMA sending transcation the FIFO get full and the m_axis_mm2s_tready de-asserted ,we think that the DMA start to Lock the accessing of other modules to the DDR3 (SDRam) . This gives AXI DMA a pre-determined receive byte count, allowing AXI DMA to command the exact number of bytes to be transferred. I'm trying to set up a very simple DMA transfer to a slave module that can be expanded later once the framework is in place, but as so often happens when implementing an unfamiliar module, I'm running into some roadblocks. 1. When the transfer is comple I'm trying to transfer data from APU to FPGA through ACP port. Each descriptor has a pointer to the next descriptor to be processed. (I have attached snapshot of my design). In other words, use register direct mode, but but a small bit of buffering on your data stream. To make things easy for us, we’ll use the template for the hello world application and then modify it to test the AXI DMA. Hi, I am using the AXI-DMA pheripheral to stream data from the PL to the DDR memory of the zynq. For a full description of DMA features, please see the hardware spec. My approach is to use AXI DMA interface to transfer data from an AXI Stream Master to an AXI Memory Mapped slave port. hi actually in my project I am transmitting 256 bytes of data from one board to another zynq board through DMA, FOR THIS PURPOSE I HAVE TAKEN OUT DMA DATA SIGNAL ALONG WITH AXI CONTROL SIGNALS ALSO FROM ONE BOARD TO THE OTHER BOARD. DDR interface is a AXI-Full slave MIG IP block for a Kintex FPGA. xaxidma_example_simple_intr. Linux ARM, OMAP, Xscale Kernel: Re: [PATCH v7] dma: Add Xilinx AXI Direct Memory Access Engine driver support When I use the instruction “XAxiDma_SimpleTransfer” to transfer the values from the variable “A” to the DMA, the status return as “15” failing to transfer the data. Unfortunately, same result - both channels stuck busy. Only one transfer can be submitted to the hardware at a time. I am using the xaxidma_example_simple_poll. Once I do the first transfer using simpleTransfer () function, halted bit This is the driver API for the AXI DMA engine. 您好，感谢您的回复，后来我核对了一下dma地址，由于我vivado侧ip发生过变化，在vitis侧更新xsa后，地址没有变更过来，导致dma没有成功配置，所以没有开启传输。更改完这个问题后我又遇到了新的问题，希望您能够提供一些解决思路，现在这套逻辑可以进行dma传输，但是dma传输存在丢数据的现象 Hello everyone, I am having a great deal of trouble figuring out how to setup drivers for the Xilinx DMA IP core in Linux/Petalinux Project. How to use the AXI DMA in Vivado to transfer data from the FPGA fabric into the DDR memory and the other way around Hello, I am using the Zynq Ultrascale+ ZCU102 board with Vivado 2024. The last descriptor in the chain then points bac Hi, I have asked this question over in the xilinx forums already but have not found a solution yet, so I'm reposting it here: I'm desiging a Zynq-7020 based system where I occasionally need to transfer up to 64MB of data from the PL to the PS. We’ll create the hardware design in Vivado, then write a software application in the Xilinx SDK and test it on the MicroZed board (source code is shared on Github for the MicroZed Driver Implementation For a full list of features supported by this IP, please refer to the AXI DMA product page. 1 and Vitis 2024. My goal here is to send a large ammount of data to the PL as one single transfer and receive the same ammount of data from the PL, as several seperate (and smaller) transfers. No, the addresses should not be zero. 3w次，点赞89次，收藏369次。本文深入探讨ZYNQ AXI DMA简单模式的使用方法，包括初始化流程、查询模式下的数据传输机制，以及如何正确处理tlast信号确保传输准确无误。通过实例分析，分享了DMA在实际应用中的常见问题及解决方案。 This file demonstrates how to use the xaxidma driver on the Xilinx AXI DMA core (AXIDMA) to transfer packets in polling mode when the AXI DMA core is configured in simple mode. Hello, I am a student and really new to the Vivado-Toolchain. The problem I have is that I cannot transfer data to the same location in the ddr memory twice. The AXI4 Lite interface will be used to configure the DMA (set source and destination addresses, start a transfer…), and the AXI4 Stream will be used to manage the data itself. 4k次，点赞2次，收藏13次。本文深入探讨了Xilinx ZYNQ SoC上AXI_CDMA控制器的特性和使用方法，包括轮询和中断模式下的简单传输与分散收集传输。通过对比处理器直接数据搬移和DMA数据搬移的效率，展示了不同场景下DMA的优势。 Allows AXI DMA to use a receive length field that is supplied by the S2MM target IP in the App4 field of the status packet. Focusing on the DMA, we can see that there are 2 AXI4 connections on each DMA. Xil_Out32 ( XPAR_AXI_DMA_0_BASEADDR \+ 0x28 , len ); } </code> I want to write 256 BYTES in DDR using AXI DMA. I have followed many tutorials and guides and for some reason I'm just not getting any results. I have created a simple block diagram where I connect a custom AXI-stream counter to an AXI-DM Update 2017-10-10: I’ve turned this tutorial into a video here for Vivado 2017. The problem is that XAxiDma_LookupConfig and XAxiDma_CfgInitialize both AXI DMA operation requires a memory-resident data structure that holds the list of DMA operations to be performed. I have a bare-metal application setup currently that work well at 400MB/s from the PL to PS and streams data from AXI stream generator I made to simulate a When this experiment is complete, you will be able to: Use AXI4-Stream Data FIFO and AXI DMA Use the xaxidma driver on the Xilinx AXI DMA to transfer packets in polling mode Use the xaxidma driver on the Xilinx AXI DMA to transfer packets in interrupt mode Get DMA status through UART I meant instead of using the more elaborate scatter-gather solution. The completion of the transfer is checked through polling. Apr 8, 2025 · It is determined in PL by assertion of the TLAST signal in the AXI-Stream data coming into the AXI DMA. I am writing a module to capture sensor data to a fifo then transfer that via a AXI stream to a AXI_DMA Ip block to fill up a DDR MIG IP block for a kintex FPGA. This file demonstrates how to use xaxicdma driver on the Xilinx AXI CDMA core (AXICDMA) to transfer packets in simple transfer mode without interrupt. It has a small logic footprint and is a simple interface to work with both in design and usage. Flexibility—Providing the right protocol for the application: ° AXI4 is for memory mapped interfaces and allows burst of up to 256 data transfer cycles with just a single address phase. A simple DMA transfer only needs source buffer address, destination buffer address and transfer length to do a DMA transfer. These serve as bridges for communication between the processing system and FPGA programmable logic fabric, through one of the DMA ports on the Zynq processing system. I have an IP Core generated using Vitis HLS. Jun 24, 2025 · Direct Register Mode (Scatter Gather Engine is disabled) provides a configuration for doing simple DMA transfers on MM2S and S2MM channels that requires less FPGA resource utilization. Data is fed into a FIFO before being transmitted via 文章浏览阅读3. Add another axi interconnect to the block diagram and connect its input to the ps axi master out and then the output to the dma axilite input. It does the following: * Set up the output terminal if UART16550 is in the hardware build * Initialize the DMA engine * Set up Tx and Rx channels * Set up the interrupt system for the Tx and Rx interrupts * Submit a transfer * Wait for the transfer to finish * Check transfer status * Disable Tx and Rx interrupts * Print test status and exit The AXI DMA Controller IP core is a high-speed, high-throughput, general purpose DMA controller intended to be used to transfer data between system memory and other peripherals like high-speed converters. Here the 3 years ago Exactly, I read this a few times as well - which is why I tried only starting my IP after the DMA core was set up (last point in the list). 5k次，点赞12次，收藏18次。大位宽时AXI STREAM的传输不连续问题，可以通过插入FIFO并使能Enable Packet Mode进行解决。上面的讨论不一定准确，仅供参考。_axi读地址不连续 Hey all! I'm trying out a simple design using the AXI DMA interrupts, in simple mode. Data Structures | Macros | Typedefs | Functions Overview 文章浏览阅读3. Unzip and import project As I previously mentioned in the hardware setup of the AXI DMA in Vivado, it is configured for direct register mode, meaning that simple transfers of data of a given length will be transferred from a source address to a destination address in main system memory via the MM2S and S2MM DMA channels. No scatter - gater (SG) mode Used some "old?" IPs for AXI protocol conversions Note: if you have big trouthput, you will fail to proccess big data stream in linux You do not need SG in most cases. I attached the block design below. 1 English - Provides high-bandwidth direct memory access between memory and AXI4-Stream-type target peripherals. 2k次。本文介绍了一种AXI DMA设备在简单模式下进行数据传输的方法。该方法首先检查DMA引擎的状态，确保其未处于忙碌状态且配置正确，然后根据传输方向设置相应的寄存器以启动传输过程。 AXI DMA LogiCORE IP Product Guide (PG021) - 7. ° AXI4-Stream removes the Xil_Out32 ( XPAR_AXI_DMA_0_BASEADDR \+ 0x18 , dstAddress ); //write length to S2MM_LENGTH register. AXI Traffic Generator AXI Traffic Generator can generate a sequence of AXI bursts with an incrementing address and a known pattern, which simulates behavior of a DMA. ioh2m, u57n2, c0sg8, ds1z3, qdqrku, 4fc2c, qptnk3, yums, hvgfs, ir64s1,