Honored ContributorAfter compiling SOPC ( device EP2C8Q208C8 ) , NSDO , NSCE AND DCLK (epcs_flash_controller) are generated so I assign pin 1 to NSDO , pin 2 to NSCE and pin 21 to DCLK . Under Quartus v11.0 there are 2 errors said " can't place multiple assignment pin ...... " . This message I still don't understand !!!!!
Honored ContributorGo into the device settings, into the dual purpose pins tab and check that those pins are set up to be used as regular i/o in user mode.
Honored ContributorThe two pins are already set to regular I/O .
Honored ContributorI didn't see that you had a Cyclone II. In that case you shouldn't have any pins outside of the EPCS flash controller, they should automatically be routed internally to the EPCS flash. Are you sure that your SOPC project is also targetted for a Cyclone II, and not a Cyclone III/IV? The pins outside of the EPCS controller should only appear with those later Cyclone FPGAs.
Honored ContributorThe problem is solved , I reinstall quartus 11.0 and epcs controller is disappeared .
Honored Contributori also face this problem
Honored Contributorat last i solved it
