Stratix V Development board with QSFP ports

I have added the SDRAM controller to the qsys and assigned all the pins.

The next step tho I have trouble with and that is how to use it. I have tried that example of writing to the RAM from the host computer via the jtag interface but would like to do it differently.

How to read and write to the SDRAM with either VHDL code or a NIOS program? Must I specify the RAM address everytime on the address lines or do I just send data on data lines? How then would I read the data at a specific SDRAM location? I have been trying to find an example of how this is done but no success yet.

Cheers,

Paul