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alt_up_sd_card_open_dev return 0. Whats wrong??

Altera_Forum
Honored Contributor II
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Hallo, 

 

I try to use the SD-Card IP from the University Proram and have implement the ip into my nios II System in sopc builder. 

 

 

If I try to use the function  

 

alt_up_sd_card_open_dev(SD_CARD_NAME) 

 

it returns always zero. 

 

What did I wrong? Can everybody help me? 

 

Another Question is, what is the Maximum size of the sd Card I can use with the University program? 

 

Thanks
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