Forum Discussion

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

Nios II with on-chip Dual port ram between Nios and External DSP

Hello, I'd like to implement a dual port ram using on chip memory, with one side connected to the Avalon bus and other connected to an external DSP. Not sure where to get started; I can not se...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Thank you for your prompt response.

I will try what you've suggested. Just for clarification (please correct me if I am wrong):

1) I can create a dual port RAM component using Qsys; this DPRAM component will have two Avalon slave interfaces, s0, and s1.

2) The first slave interface s0 will connect to the master port of the Nios II processor via the Avalon fabric, and the second slave port s1 will connect to the Avalon-MM master component as you've suggested.

3) The newly created Avalon-MM component should be a 'dummy' that brings all of the master signals out via conduits? Then I can connect these to glue logic / pins as needed?

I see that the dual port memory has an option for two clock inputs; I assume I need to use this since the external interface will be in a different clock domain (ie the external memory interface)?

Best regards,

Scott