Fpga+nios+sdram

Good morning,

Am relatively new to FPGA development and and am working on image processing devace.

My working device is Terasic board DE2-115.

The goal of my work is to develop sysytem capable at first to capture image from camera, make some transformations on fpga, at second the put data into sdram and finaly read this information on NIOS.

First and second problem are solved, I used example from devkit.

But I can't solve problem of reading memory in NIOS.

Is any advices, tutorials or eny help document capabel to help me in this problem.