Regarding reading SDRAM from HDL

[Altera_Forum]

Hi this is sundaram from University of waterloo. I'm currently working on a project that requires the controls to get modified based on certain bits. I was using the switches with the always block to monitor the changes. But now, as I'm thinking about a scalable solution, I was wondering if I could monitor changes in certain bits in the SDRAM with the always block. Please let me know how I can do that. 

 Thanks.

[Altera_Forum]

What would change those bits you want to monitor? It may be easier to create some control registers in your HDL that could be modified by an external CPU.

[Altera_Forum]

yea i need to do that exactly.. How can you create control registers in the HDL which can be modified by a nios core?

[Altera_Forum]

You need to create a component with an Avalon Memory Mapped Slave interface. This interface will let you expose registers that the CPU can read and write.