Diff: SDCard.h

Revision:

0:3fe14de7b0cf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDCard.h	Mon Jul 13 09:21:41 2015 +0000
@@ -0,0 +1,70 @@
+#ifndef _MMC_SD_H_
+#define _MMC_SD_H_		 
+
+#include "mbed.h"
+
+ 						    	 
+//the type of SD card
+#define SD_TYPE_ERR     0X00
+#define SD_TYPE_MMC     0X01
+#define SD_TYPE_V1      0X02
+#define SD_TYPE_V2      0X04
+#define SD_TYPE_V2HC    0X06	   
+//order of SD card    
+#define CMD0    0       //card reset
+#define CMD1    1
+#define CMD8    8       //order8,SEND_IF_COND
+#define CMD9    9       //order9,read CSD data
+#define CMD10   10      //order10,read CID data
+#define CMD12   12      //order12,stop data transfer
+#define CMD16   16      //order16,set SectorSize ,ought to return 0x00
+#define CMD17   17      //order17,read sector
+#define CMD18   18      //order18,read Multi sector
+#define CMD23   23      //order23,set multi setor erase N block before writting
+#define CMD24   24      //order24,write sector
+#define CMD25   25      //order25,write Multi sector
+#define CMD41   41      //order41,should return 0x00
+#define CMD55   55      //order55,should return 0x01
+#define CMD58   58      //order58,read information of OCR 
+#define CMD59   59      //order59,enable/disable CRC,should return 0x00
+//the meaning of return data after writing
+#define MSD_DATA_OK                0x05
+#define MSD_DATA_CRC_ERROR         0x0B
+#define MSD_DATA_WRITE_ERROR       0x0D
+#define MSD_DATA_OTHER_ERROR       0xFF
+//SD card respond sign
+#define MSD_RESPONSE_NO_ERROR      0x00
+#define MSD_IN_IDLE_STATE          0x01
+#define MSD_ERASE_RESET            0x02
+#define MSD_ILLEGAL_COMMAND        0x04
+#define MSD_COM_CRC_ERROR          0x08
+#define MSD_ERASE_SEQUENCE_ERROR   0x10
+#define MSD_ADDRESS_ERROR          0x20
+#define MSD_PARAMETER_ERROR        0x40
+#define MSD_RESPONSE_FAILURE       0xFF
+ 							   						 	 
+
+#define	SD_CS  PBout(2) //SD Card CS pin				    	  
+
+extern u8  SD_Type;//SD card type
+
+
+
+//functions
+u8 SD_SPI_ReadWriteByte(u8 data);
+void SD_SPI_SpeedLow(void);
+void SD_SPI_SpeedHigh(void);
+u8 SD_WaitReady(void);							//�ȴ�SD��׼��
+u8 SD_GetResponse(u8 Response);					//������Ӧ
+u8 SD_Initialize(void);							//��ʼ��
+u8 SD_ReadDisk(u8*buf,u32 sector,u8 cnt);		//����
+u8 SD_WriteDisk(u8*buf,u32 sector,u8 cnt);		//�
+u32 SD_GetSectorCount(void);   					//��������
+u8 SD_GetCID(u8 *cid_data);                     //��SD��CID
+u8 SD_GetCSD(u8 *csd_data);                     //��SD��CSD
+ 
+#endif
+
+
+
+