#define CSD_SIZE 16#define CID_SIZE 16#define DUMMY_NBR 10int open_mmc (void);char *get_csd (void);char *get_cid (void);int release_mmc (void);int read_block (unsigned char, unsigned char, unsigned char, unsigned char, char *);int write_block (unsigned char, unsigned char, unsigned char, unsigned char, char *);