+#if CPU_CM3_SAM3X8
+
+typedef struct SDcid
+{
+ uint8_t manfid;
+ uint8_t prod_name[8];
+ uint32_t serial;
+ uint16_t oemid;
+ uint32_t year_off;
+ uint8_t m_rev;
+ uint8_t l_rev;
+}SDcid;
+
+typedef struct SDcsd
+{
+ uint8_t structure;
+ uint8_t ccc; ///< Card command classes
+ uint32_t erase_size; ///< The size of an erasable sector, in write block len
+ uint32_t capacity; ///< Card size in byte
+ uint32_t blk_len; ///< Block data size len in byte
+ uint32_t blk_num; ///< Number of block in card
+ uint32_t write_blk_bits; ///< Max write block length in bits
+ uint32_t read_blk_bits; ///< Max read block length in bits
+ uint8_t read_partial:1,
+ read_misalign:1,
+ write_partial:1,
+ write_misalign:1;
+} SDcsd;
+
+
+typedef struct SDAddr
+{
+ uint32_t rca;
+ uint32_t status;
+} SDAddr;
+
+int sd_decode_csd(SDcsd *csd, uint32_t *resp, size_t len);
+void sd_dump_csd(SDcsd *csd);
+void sd_decode_cid(SDcid *cid, uint32_t *resp, size_t len);
+void sd_dump_cid(SDcid *cid);
+void sd_send_init(void);
+void sd_go_idle(void);
+int sd_send_if_cond(void);
+int sd_send_app_op_cond(void);
+int sd_get_cid(uint32_t *resp, size_t len);
+int sd_get_csd(uint32_t *resp, size_t len);
+int sd_app_status(uint32_t *resp, size_t len);
+int sd_send_relative_addr(uint32_t *resp, size_t len);
+void sd_decode_addr(SDAddr *addr, uint32_t *resp, size_t len);
+void sd_dump_addr(SDAddr *addr);
+#endif
+
+
+#define SD_UNBUFFERED BV(0) ///< Open SD memory disabling page caching, no modification and partial write are allowed.