Axi data fifo connects one axi memorymapped master to one axi. The principal operation of this core allows the write or read of data packets to or from a device without any concern over the axi streaming interface. The valid signal is pulled low only when there is no data available to be read. I have been so far unable to find a datasheet that explains what the gui configuratio. I wanted to use the datacount port see figure polled using a gpio allinput to know how many elements are occupying the fifo. Download the xilinx documentation navigator from the design tools tab. Hi all, my application has 32 x 16bit incoming video channels. This is a fifo that has 1 slave axi stream interface and 1 master axi stream interface. For axi4, the fifo data width matches the axi4stream. When configured to upsize the data width by a factor of 2, there are only 4 burst buffers implemented in the fifo.
The xilinx logicore ip fifo generator is a fully verified firstin firstout fifo memory. Hello everyone, i am using a axi4 stream data fifo on a zynq7000 7z020 to store data incoming on a stream from a custom module before reading it with an axi dma. Before beginning an axi design, you need to download, read, and understand the. Axi4axi3 write address channel fifo interface signals. The fifo is always implemented with a depth of 512 single bram block, as viewed on the wider mi interface. Download the xilinx documentation navigator from the design tools tab on the.
Hi, in my design i am using axi4 stream data fifo as a part of logic for averaging components over two lines two video lines. The core can be used to interface to the axi ethernet without the need to use dma. It seems that the axi4stream fifo would be ideal as it converts from axistream to axi4 and i could connect it directly to the axi interconnect for dma processing. Download the xilinx documentation navigator from the downloads page. I have configured the fifo for packet mode, and size equal to 2048. It is not the axi4 stream fifo, which is a mm2s type device. Axi4stream interconnect provides buffering, data steering. The axi streaming fifo allows memory mapped access to a axi streaming interface. Im looking for the user guide for the axi4 stream data fifo. When configured to upsize by any larger ratio, there will be 8 buffers implemented. Depending on the data interface option, either axi4 or axi4lite is used. Overview selectable memory type block ram, or distributed ram selectable application type data fifo, packet fifo, or low latency fifo packet fifo feature is available only for commonindependent clock axi4stream fifo and common clock axi4axi3 fifos.
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