How can I boot NIOS from EPCS for Cyclone III with Quartus 10.0?

Question

When I configure CIII in Quartus 10.0, I can't set the DCLK, ASDO, FLASH_NCE as regular I/O in Assignment->Device. DCLK can only be selected as "use as programiming pin", and the other two can only be "as input tri-stated". If I connect the pins of NIOS2 EPCS_Controller to them, I always receive "Error: can't place multiple pin" during complie->fitter step.

It seems that in EPCS_Controller, DCLK is output, but it cannot be located at the pin of dedicated configure pin.

Can anybody tell me what should I do, just leave them floating?

Thank you.

Derek

altera_forum · Answer

This is a known bug in the Quartus II 10.0 GUI.  You can set the pins to user I/O by editing the settings file manually.  Check out this thread (http://www.alteraforum.com/forum/showthread.php?t=24146&amp;highlight=quartus+10+user+i%2fo) for more details.

altera_forum · Answer

Your reply saves me a lot of time. Thank you very much.

altera_forum · Answer

same here tnx

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How can I boot NIOS from EPCS for Cyclone III with Quartus 10.0?

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