SOPC builder and DPRAM

[Altera_Forum]

High! 

I need to implement a dpram with AVALON on 1 side and a free access for an IP I already have. The avalon would be in a write only scheme and the IP in read only. But when I put an on chip ram in dp it apparently puts a2nd avalon and not just the other port for free access. Actually I mean simple exported conduits on the port I wish to have non- avalon. Any trick or should I put a dummy design that puts the avalon from one side to the other and use a wizzard generated dpram outside the sopc builder? Thanks in advance for your suggestions.  K.r. Thomas

[Altera_Forum]

If you don't need great performance, a simple solution could be this. 

Create dpram outside sopc system, with the wizard; then add a tristate bus in sopc builder and connect here one port of the ram.

[Altera_Forum]

You can also design a custom component with the dual port ram inside, one port connected to an Avalon Slave interface and the other one an export interface that directly exposes the signals.

[Altera_Forum]

Hi Cris72 and Daixiwen! 

Thanks for your fast reply. Actually I've started implementing Daixiwen's solution. This because I've decided to put the whole IP as a custom peripheral. So the DPRAM is only a section of that. By the ways it's an I2S interface with a 2K samples buffer. Samples are streamed in and out by Ethernet.  The IP has been used before on an Excalibur EPXA4! That was a good one!  Good day to all of you  Thomas