NiosII on StratixII

Hi Campo:

This is a classic memory error type of failure. It's most likely caused by incorrect or non-existent IO timing setup in the SDF for the memory interface.

One way to test this, is I like to make a "Special" build with a large TCM (tightly coupled memory) that I run the "Memory Test" example code base out of. As long as the internal timing is met, you can be sure the TCM will function, then you can validate the external memory to make sure it works, before you try to load code and run it from the external memory.

Pete