SDcard card detection problem

Nios® V/II Embedded Design Suite (EDS)

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SDcard card detection problem

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working on NIOS tool ,I am not able to check whether SDcard is present or Not, .I can see aux_reg bit '1' is high always, when i remove sdcard and reinsert sdcard aux_reg is high only.is there any problem with IPcore or do we need to use any function in code.??

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