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How can I access block ram on both PS and PL when I use ZedBoard?

Former Member

Hello everybody~

Now I have a question. I need archive this:
1. send data from PS to bram in PL by AXI.
2. read bram in PL.

For first task, I think I can use axi-bram-controller to transfer data. But for second task, I don't know how to access the bram in PL. Do I need design my own bram controller and use it to access the same bram, or just modify the axi-bram-controller to add my own code?

Thanks~~ :D

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    Hi there,

    I suggest that you use a DUAL PORT BRAM. This way, you can have the PS read from it, while you write to it. I would start with the AXI BRAM Controller. Then you can use one of the BRAM ports to allow the PL to read the memory, while the PS can fill the memory using AXI.

    In this case, you will need to create your own BRAM interface as you would using any other instantiated BRAM.  There are timing diagrams and logic flow diagrams in the datasheet to assist you in this design.

    --Dan

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  • 0

    Hi there,

    I suggest that you use a DUAL PORT BRAM. This way, you can have the PS read from it, while you write to it. I would start with the AXI BRAM Controller. Then you can use one of the BRAM ports to allow the PL to read the memory, while the PS can fill the memory using AXI.

    In this case, you will need to create your own BRAM interface as you would using any other instantiated BRAM.  There are timing diagrams and logic flow diagrams in the datasheet to assist you in this design.

    --Dan

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