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QDRII+ on Stratix IV fails to work on a NIOS system.

Honored Contributor I

Hello everyone. 


I used the tutorial provided on this link ( to get the timing values and I have instantiated this QDR module on QSYS, along with a NIOS II/e processor. 


With everything loaded on a on-chip memory, I've attempted to run memory test on the QDR, but it fails at the first bit when checking the data bus. 


Another thing that I can't get is: What is the difference between the avl_r and avl_w ports on QSYS? I don't know exactly how to connect them on the NIOS module. 


I will attach the qsys screenshot in a few moments. 


Any help is appreciated, thank you!
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Honored Contributor I

Screenshot as promised.