Forum Discussion

Amir3's avatar
Amir3
Icon for Occasional Contributor rankOccasional Contributor
4 years ago
Solved

Avalon MM Slave - What's the simple way to extract the above lines from QSYS to HDL?

Hi, What's the simple way to extract Avalon MM lines from QSYS to HDL? The goal is to connect the component I am preparing as another Slave on the Bus while the Master remains the NIOS. I will im...
  • MathiasB's avatar
    MathiasB
    4 years ago

    Hi,

    The proper way in my opinion would be to instantiate a "Avalon-MM Pipeline Bridge" IP in your Qsys.

    You connect its slave interface to the Nios master and export IP's master side.

    When you instantiate the qsys in your hdl, the Avalon signals will be there for you to connect to your component.

    As for your other question, what are you trying to do? I would say you can simply export anything from your Qsys to wherever it is instantiated.

MathiasB's avatar
MathiasB
Icon for Occasional Contributor rankOccasional Contributor
4 years ago

I am not sure I understand what you mean. Do you have a link to where you read about this component?

Otherwise, what I suggested applies if you want to connect your slave component outside of Qsys (eg: the qsys and the component are both instantiated in a top module).

But if you want to, you can directly put your VHDL component inside the Nios' Qsys and connect the Avalon interfaces like any other IP. To do this, you have to generate a _hw.tcl file for your module. Then it appears in Qsys' IP catalog.

I would say it is easier to connect everything inside Qsys, because it can automatically add protocol converters if needed.