Hello George,
Not so complete as the i.MX stress test. You could try the attached code.
Create a project based on the SC_120MHz code. The run the tests. I hope it helps you to find the issue.
Luis
Original Attachment has been moved to: dram.c.txt.zip
Original Attachment has been moved to: mem_test.c.txt.zip
Original Attachment has been moved to: memtest.h.txt.zip