Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Stratix4GX PCIe development board to used as root port

I wanted to know if anyone has used the Altera Stratix4GX PCIe card as a root port. I have used it as endpoint but have not used as a root- port. As an endpoint all I have to do is plug in t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

--- Quote Start ---

I notice that the Altera Stratic4gx root port has Base address register, That filters out only specific requests (?)

In my application I need the ability to send out any cycles from processor to the root port on the motherboard via the Stratix4GX Root port. Is that possible? I am bit confused about having BAR in root port which limits this?

--- Quote End ---

I am pretty sure that the root port can send out any requests, but you may have to make use of the most native PCIe application interface like the Avalon ST where you issue all the TLPs natively, instead of an SOPC design.

I’m just developing an end point design with AST interface. I have heard not the best critics about the SOPC adaptors supplied by Altera, so I wanted to make my mistakes myself. I don’t know precisely which BAR decoding you refer to, but I don’t think it’s related to what requests can go out to the PCIe bus/link.