Circular buffer

[Altera_Forum]

Ok, i have built up a system with audio in and out using the DE2 board, my initial volume control works so now i wish to have some audio effects - echo delays, filters, reverbs etc. 

  I understand the concepts of the circular buffer but i'm just stuck on where to start regarding reading and writing to the onboard RAM and also which RAM should i use, SRAM or DRAM?   I have NIOS CPU using the SRAM and have instantiated the DRAM in SPOC builder but thats as far as i've got.   I have had a search on the forums but haven't found what i want.    Any tutorials, examples, recommended reading or suggestions would be much appreciated

[Altera_Forum]

The RAM type doesn't matter since You'll be using Avalon-MM. Check Avalon-MM interface specifications. It's quite easy: You set up write or read signal in addition to address, wait until waitrequest is down and proceed with data read/write.

[Altera_Forum]

Thanks that definitely gives me a clue where to start but would i need to create a tcl component in SOPC to set up the read/write and address?

[Altera_Forum]

No, go through the component creation wizard and TCL file will be generated automatically. Check Avalon-MM templates.