Integrate IP with APB and AXI interfaces

[Cong Tran Van]

Hi everyone, 

I have an IP using APB and AXI interface.
Which bridge can I use to connect that IP with Openpiton?
with 2 bridges Noc2AXI4 and Noc2Axilite, how many bits of address and bits of data can be used?

Thanks,
Cong

[Jonathan Balkind]

Hi Cong,

It depends on what exactly you need. Is the IP driving the AXI interface (a "master") or being driven by it (a "slave")? That would affect which bridge or setup to use.

For APB: Previously we have used the NoC to AXI-Lite bridge (provided by openpiton) + an AXI-Lite to APB bridge (axi2apb here in Sanzhar's repo https://github.com/Sequner/byoc/tree/Sanzhar-nvdla/piton/design/chipset/accelerators/rtl) to connect to IP that used APB (specifically Sanzhar was connecting NVDLA).

I don't think the IP tends to care how many bits of address there are. Our AXI-Lite bridge supports 32 or 64 bits of data.

Thanks,

Jon

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