06-10-2012 01:18 AM
Hi everyone, I'm facing one problem and I don't know why, pls help me.
I created successfully a custom IP and it work correctly. I also created a DDR SDRAM Controller by VHDL code through NPI and using MPMC.
Both of them work properly when run independently. But when I combine them in one IP or put 2 IPs into one project, only the former can run as I expect, NPI block can't write anything into DDR SDRAM. I see the change in address but nothing in data. And I can't explain.
I use Spartan 3E 1600 and Xilinx 12.3
Anyone can help me.
Thank you very much.