vvdriver.h

基于周立功FAT32文件系统建立的项目

/*
	Author: Johnny Chen
*/


#ifndef __VVDRIVER_H__
#define __VVDRIVER_H__


extern char *vv_name_buf;
extern char *vv_name[3];

#define VIRTUAL_VOL_NAME    vv_name_buf


/* error code */
#define VOL_NO_ERR          0x00
#define VOL_ERR             0x01
#define VOL_ERR_OVER_RANGE  0x02


/*** User API Function: Initialize,read,write,erase SD Card ***/

// |Reserved|FAT1|FAT2|          Root_Dir &            |
// | region |    |    |Files and others dir data region|
// |   0    |    |    |                                |

#define SEC_PER_CLUS    ((uint8)1)
#define SIZE_SEC        ((uint16)512)               /* unit: byte */
#define SIZE_CLUS       (SIZE_SEC*SEC_PER_CLUS)

#define SIZE_DATA_DEF   ((uint32)(33*1024*1024))    /* fat32卷数据区预分配空间大小: 33M */

#define FREE_CLUS       ((uint32)(SIZE_DATA_DEF/SIZE_CLUS))
#define FAT_ENTRY_NUM   ((uint32)(FREE_CLUS + 2))
#define FAT_NUM         ((uint8)2)

#define SEC_NUM_RESEV   ((uint32)32)                /* fat12/16 - 1扇区, fat32 - 32个扇区 */
#define SEC_NUM_FAT     ((uint32)((32*FAT_ENTRY_NUM)/SIZE_SEC + ((32*FAT_ENTRY_NUM)%SIZE_SEC?1:0)))
#define SEC_NUM_DATA    ((uint32)(SIZE_DATA_DEF/SIZE_SEC + (SIZE_DATA_DEF%SIZE_SEC?1:0)))
#define SEC_NUM_VOL     ((uint32)(SEC_NUM_RESEV + SEC_NUM_FAT*FAT_NUM + SEC_NUM_DATA))

#define SIZE_RESEV      (SIZE_SEC*SEC_NUM_RESEV)
#define SIZE_FAT        (SIZE_SEC*SEC_NUM_FAT)
#define SIZE_DATA       (SIZE_SEC*SEC_NUM_DATA)     /* fat32卷数据区实际分配空间大小 */
#define SIZE_VOL        (SIZE_RESEV + SIZE_FAT*FAT_NUM + SIZE_DATA)     /* 卷文件总大小 */

#define ADDR_SEC_RESEV  0
#define ADDR_SEC_FAT    (ADDR_SEC_RESEV + SEC_NUM_RESEV)
#define ADDR_SEC_DATA   (ADDR_SEC_FAT + SEC_NUM_FAT*FAT_NUM)

#define ADDR_RESEV      0
#define ADDR_FAT        (ADDR_RESEV + SIZE_RESEV)
#define ADDR_DATA       (ADDR_FAT + SIZE_FAT*FAT_NUM)


#define HARD_DISK       ((uint8)0xF8)      /* hard disk device */
#define FAT_EXT_SIGN    ((uint8)0x29)


#define FORMAT_VOL_QUICK        TRUE


void VV_SetVVName(char *name);


#endif