external storage for FPGA

Discussion in 'VHDL' started by Runar Gjelsvik, Aug 25, 2004.

  1. Hi,

    I'm working on a project with a Xilinx Vertex 2 FPGA.

    One of the things I want to do is to download data from a computer and onto
    the FPGA. This I've managed to do using picoblaze. BUT, this is data needed
    by the FPGA to do certain calculations, i.e. the data needs to be regained
    after a power-on-reset. So, my question is, is it possible to either
    preserve some space on the prom or on some other flash rom so that the FPGA
    can store this data on this external storage, and then after a power-up it
    will read the data into its local RAM.

    Any tips, web-sites etc would be great!

    Cheers,

    Runar
     
    Runar Gjelsvik, Aug 25, 2004
    #1
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  2. Runar Gjelsvik

    Max Baker Guest

    Hi Runar,

    Runar Gjelsvik wrote:
    > Hi,
    >
    > I'm working on a project with a Xilinx Vertex 2 FPGA.
    >
    > One of the things I want to do is to download data from a computer and onto
    > the FPGA. This I've managed to do using picoblaze. BUT, this is data needed
    > by the FPGA to do certain calculations, i.e. the data needs to be regained
    > after a power-on-reset. So, my question is, is it possible to either
    > preserve some space on the prom or on some other flash rom so that the FPGA
    > can store this data on this external storage, and then after a power-up it
    > will read the data into its local RAM.
    >
    > Any tips, web-sites etc would be great!
    >
    > Cheers,
    >
    > Runar


    Check out XAPP694, "Reading User Data from Configuration PROMs".

    http://www.xilinx.com/bvdocs/appnotes/xapp694.pdf

    Cheers,
    -m
     
    Max Baker, Aug 25, 2004
    #2
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