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STM3210C_eval evaluation board use Fatfs- f_getfree() functino

Question asked by sonar on Dec 31, 2015
Latest reply on Jan 6, 2016 by sonar
Hi guys,

I used AC6 system workbench to development STM3210C_eval evaluation board.
Now I try to use Fatfs to get SD card Capacity->res = f_getfree("0:/", &fre_clust, &fs);
In debug mode, I get:
Name : res
what's happened? Does someone can help me?

Thank all.