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Altera_Forum
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21 years ago

Interface to User Logic

I am building a Nios2 system that has custom RAM/FLASH. I am trying to use the Interface to User Logic using an 8 bit data bus (inout), 15 address bits, nRD, nWR, and 2 nChipselects. How in tarnati...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Well it looks like the SOPC may have a bug. All I did was deltete the whole Interface to user logic and generate a new one. I looks just like the one I couldn't get working, but for some reason this one works.

On a side note: Where in the SDK and IDE/HAL do you set where the stack is? The only memory I have is external using an avalon slave memory bus. I used a single chip select and sub decoded it ouside the SOPC (4 additional chip selects). I may not have any memory connected to the top 3 (expandability). I know that the reset and exception are covered, but how do I setup the stack and data memory? In the IDE, you can select it in the system library preferences, but I never saw where you set the base address (physical). Wouldn't want it to throw it at the higher addresses!

Rick