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

Hello everyone. 

 

I used the tutorial provided on this link http://www.alterawiki.com/wiki/design_example_-_stratix_iv_qdr_ii_sram_uniphy_400mhz_x18 (http://www.alterawiki.com/wiki/design_example_-_stratix_iv_qdr_ii_sram_uniphy_400mhz_x18) 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
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Screenshot as promised.

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