On Thu, Sep 6, 2018 at 2:43 PM Pratik Chatterjee via USRP-users <
[email protected]> wrote:

> Hi,
>
> Can anyone please provide some insight on the use of configuration buses
> in the axi wrapper - why and when would we want to use them? Do they
> complement the axis stream signals (m_axis and s_axis) in any way? Thank
> you,
>

I've seen them used when you need to provide tlast along with some
configuration data.  Specifically, I've seen it used in the FIR filter and
window functions where you have reloadable coefficients that have a
specific length to it, but potentially unknown.

It's slow since really it's just a wrapper around the register writes that
also happens to issue tlast when you write to the appropriate register.

Brian
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