stm32f769 寄存器配置SD卡---移植fatfs

昨天开始在上周实现的SD卡读写基础上移植fatfs文件系统，开始不是很顺利，之前没有搞过，完全按照f767的例程移植的，但是在加载SD卡时一直是失败的，很郁闷，折腾了一天，结果还不理想，睡了个好觉，思路清晰了，参考的同时，也要加入自己的思想，果然很顺利的按我的思路实现了，太开心了，说明一下，本次移植的是最新的版本ff13a。需要的自己下载

下面详细介绍
按照f767的例程，把ffconf.h里面的宏定义的赋值进行修改

#define FF_FS_READONLY       0
/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)
/  Read-only configuration removes writing API functions, f_write(), f_sync(),
/  f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()
/  and optional writing functions as well. */

#define FF_FS_MINIMIZE       0
/* This option defines minimization level to remove some basic API functions.
/
/ 0: Basic functions are fully enabled.
/ 1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()
/    are removed.
/ 2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.
/ 3: f_lseek() function is removed in addition to 2. */

#define FF_USE_STRFUNC       1
/* This option switches string functions, f_gets(), f_putc(), f_puts() and f_printf().
/
/  0: Disable string functions.
/  1: Enable without LF-CRLF conversion.
/  2: Enable with LF-CRLF conversion. */

#define FF_USE_FIND             0
/* This option switches filtered directory read functions, f_findfirst() and
/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */

#define FF_USE_MKFS             1
/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */

#define FF_USE_FASTSEEK       1
/* This option switches fast seek function. (0:Disable or 1:Enable) */

#define FF_USE_EXPAND       0
/* This option switches f_expand function. (0:Disable or 1:Enable) */

#define FF_USE_CHMOD       0
/* This option switches attribute manipulation functions, f_chmod() and f_utime().
/  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */

#define FF_USE_LABEL       1
/* This option switches volume label functions, f_getlabel() and f_setlabel().
/  (0:Disable or 1:Enable) */

#define FF_USE_FORWARD       0
/* This option switches f_forward() function. (0:Disable or 1:Enable) */

/*---------------------------------------------------------------------------/
/ Locale and Namespace Configurations
/---------------------------------------------------------------------------*/

#define FF_CODE_PAGE       936
/* This option specifies the OEM code page to be used on the target system.
/  Incorrect code page setting can cause a file open failure.
/
/ 437 - U.S.
/ 720 - Arabic
/ 737 - Greek
/ 771 - KBL
/ 775 - Baltic
/ 850 - Latin 1
/ 852 - Latin 2
/ 855 - Cyrillic
/ 857 - Turkish
/ 860 - Portuguese
/ 861 - Icelandic
/ 862 - Hebrew
/ 863 - Canadian French
/ 864 - Arabic
/ 865 - Nordic
/ 866 - Russian
/ 869 - Greek 2
/ 932 - Japanese (DBCS)
/ 936 - Simplified Chinese (DBCS)
/ 949 - Korean (DBCS)
/ 950 - Traditional Chinese (DBCS)
/    0 - Include all code pages above and configured by f_setcp()
*/

#define FF_USE_LFN             3
#define FF_MAX_LFN             255
/* The FF_USE_LFN switches the support for LFN (long file name).
/
/ 0: Disable LFN. FF_MAX_LFN has no effect.
/ 1: Enable LFN with static working buffer on the BSS. Always NOT thread-safe.
/ 2: Enable LFN with dynamic working buffer on the STACK.
/ 3: Enable LFN with dynamic working buffer on the HEAP.
/
/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function
/  requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and
/  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.
/  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can
/  be in range of 12 to 255. It is recommended to be set 255 to fully support LFN
/  specification.
/  When use stack for the working buffer, take care on stack overflow. When use heap
/  memory for the working buffer, memory management functions, ff_memalloc() and
/  ff_memfree() in ffsystem.c, need to be added to the project. */

#define FF_LFN_UNICODE       0
/* This option switches the character encoding on the API when LFN is enabled.
/
/ 0: ANSI/OEM in current CP (TCHAR = char)
/ 1: Unicode in UTF-16 (TCHAR = WCHAR)
/ 2: Unicode in UTF-8 (TCHAR = char)
/
/  Also behavior of string I/O functions will be affected by this option.
/  When LFN is not enabled, this option has no effect. */

#define FF_LFN_BUF             255
#define FF_SFN_BUF             12
/* This set of options defines size of file name members in the FILINFO structure
/  which is used to read out directory items. These values should be suffcient for
/  the file names to read. The maximum possible length of the read file name depends
/  on character encoding. When LFN is not enabled, these options have no effect. */

#define FF_STRF_ENCODE       3
/* When FF_LFN_UNICODE >= 1 with LFN enabled, string I/O functions, f_gets(),
/  f_putc(), f_puts and f_printf() convert the character encoding in it.
/  This option selects assumption of character encoding ON THE FILE to be
/  read/written via those functions.
/
/ 0: ANSI/OEM in current CP
/ 1: Unicode in UTF-16LE
/ 2: Unicode in UTF-16BE
/ 3: Unicode in UTF-8
*/

#define FF_FS_RPATH             0
/* This option configures support for relative path.
/
/ 0: Disable relative path and remove related functions.
/ 1: Enable relative path. f_chdir() and f_chdrive() are available.
/ 2: f_getcwd() function is available in addition to 1.
*/

/*---------------------------------------------------------------------------/
/ Drive/Volume Configurations
/---------------------------------------------------------------------------*/

#define FF_VOLUMES             1
/* Number of volumes (logical drives) to be used. (1-10) */

#define FF_STR_VOLUME_ID       0
#define FF_VOLUME_STRS             "RAM","NAND","CF","SD","SD2","USB","USB2","USB3"
/* FF_STR_VOLUME_ID switches string support for volume ID.
/  When FF_STR_VOLUME_ID is set to 1, also pre-defined strings can be used as drive
/  number in the path name. FF_VOLUME_STRS defines the drive ID strings for each
/  logical drives. Number of items must be equal to FF_VOLUMES. Valid characters for
/  the drive ID strings are: A-Z and 0-9. */

#define FF_MULTI_PARTITION       0
/* This option switches support for multiple volumes on the physical drive.
/  By default (0), each logical drive number is bound to the same physical drive
/  number and only an FAT volume found on the physical drive will be mounted.
/  When this function is enabled (1), each logical drive number can be bound to
/  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()
/  funciton will be available. */

#define FF_MIN_SS             512
#define FF_MAX_SS             512
/* This set of options configures the range of sector size to be supported. (512,
/  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and
/  harddisk. But a larger value may be required for on-board flash memory and some
/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured
/  for variable sector size mode and disk_ioctl() function needs to implement
/  GET_SECTOR_SIZE command. */

#define FF_USE_TRIM             0
/* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)
/  To enable Trim function, also CTRL_TRIM command should be implemented to the
/  disk_ioctl() function. */

#define FF_FS_NOFSINFO       0
/* If you need to know correct free space on the FAT32 volume, set bit 0 of this
/  option, and f_getfree() function at first time after volume mount will force
/  a full FAT scan. Bit 1 controls the use of last allocated cluster number.
/
/  bit0=0: Use free cluster count in the FSINFO if available.
/  bit0=1: Do not trust free cluster count in the FSINFO.
/  bit1=0: Use last allocated cluster number in the FSINFO if available.
/  bit1=1: Do not trust last allocated cluster number in the FSINFO.
*/

/*---------------------------------------------------------------------------/
/ System Configurations
/---------------------------------------------------------------------------*/

#define FF_FS_TINY             0
/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
/  At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.
/  Instead of private sector buffer eliminated from the file object, common sector
/  buffer in the filesystem object (FATFS) is used for the file data transfer. */

#define FF_FS_EXFAT             1
/* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)
/  When enable exFAT, also LFN needs to be enabled.
/  Note that enabling exFAT discards ANSI C (C89) compatibility. */

#define FF_FS_NORTC             0
#define FF_NORTC_MON       1
#define FF_NORTC_MDAY       1
#define FF_NORTC_YEAR       2018
/* The option FF_FS_NORTC switches timestamp functiton. If the system does not have
/  any RTC function or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable
/  the timestamp function. All objects modified by FatFs will have a fixed timestamp
/  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.
/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be
/  added to the project to read current time form real-time clock. FF_NORTC_MON,
/  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.
/  These options have no effect at read-only configuration (FF_FS_READONLY = 1). */

#define FF_FS_LOCK             0
/* The option FF_FS_LOCK switches file lock function to control duplicated file open
/  and illegal operation to open objects. This option must be 0 when FF_FS_READONLY
/  is 1.
/
/  0:  Disable file lock function. To avoid volume corruption, application program
/    should avoid illegal open, remove and rename to the open objects.
/  >0: Enable file lock function. The value defines how many files/sub-directories
/    can be opened simultaneously under file lock control. Note that the file
/    lock control is independent of re-entrancy. */

#define FF_FS_REENTRANT       0
#define FF_FS_TIMEOUT       1000
#define FF_SYNC_t             HANDLE

然后开始修改diskio.c文件
/* Definitions of physical drive number for each drive */
#define SD_CARD             0       /* Example: Map Ramdisk to physical drive 0 */
#define DEV_MMC             1       /* Example: Map MMC/SD card to physical drive 1 */
#define DEV_USB             2       /* Example: Map USB MSD to physical drive 2 */

/*-----------------------------------------------------------------------*/
/* Get Drive Status */
/*-----------------------------------------------------------------------*/

DSTATUS disk_status (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
return 0;
}

/*-----------------------------------------------------------------------*/
/* Inidialize a Drive */
/*-----------------------------------------------------------------------*/

DSTATUS disk_initialize (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
DSTATUS stat;

switch (pdrv) {
case SD_CARD :
stat = sdcard_init();

// translate the reslut code here

break;

}
return stat;
}

/*-----------------------------------------------------------------------*/
/* Read Sector(s) */
/*-----------------------------------------------------------------------*/

DRESULT disk_read (
      BYTE pdrv,             /* Physical drive nmuber to identify the drive */
      BYTE *buff,             /* Data buffer to store read data */
      DWORD sector,       /* Start sector in LBA */
      UINT count             /* Number of sectors to read */
)
{
      DRESULT res;

switch (pdrv) {
case SD_CARD :
// translate the arguments here

res = SD_ReadDisk(buff, sector, count);

// translate the reslut code here

break;

}

return res;
}

/*-----------------------------------------------------------------------*/
/* Write Sector(s) */
/*-----------------------------------------------------------------------*/

DRESULT disk_write (
      BYTE pdrv,                      /* Physical drive nmuber to identify the drive */
      const BYTE *buff,       /* Data to be written */
      DWORD sector,             /* Start sector in LBA */
      UINT count                      /* Number of sectors to write */
)
{
      DRESULT res;

switch (pdrv) {
case SD_CARD :
// translate the arguments here

res = SD_WriteDisk((u8 *)buff, sector, count);

// translate the reslut code here

break;

}

return res;
}

/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */
/*-----------------------------------------------------------------------*/

DRESULT disk_ioctl (
      BYTE pdrv,             /* Physical drive nmuber (0..) */
      BYTE cmd,             /* Control code */
      void *buff             /* Buffer to send/receive control data */
)
{
      DRESULT res;
      int result;

switch (pdrv) {
case SD_CARD :

// Process of the command for the RAM drive

return res;

case DEV_MMC :

// Process of the command for the MMC/SD card

return res;

case DEV_USB :

// Process of the command the USB drive

return res;
}

return RES_PARERR;
}
//获得时间
//User defined function to give a current time to fatfs module    */
//31-25: Year(0-127 org.1980), 24-21: Month(1-12), 20-16: Day(1-31) */
//15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2) */
DWORD get_fattime (void)
{
      return 0;
}
在main函数里面加入头文件
FATFS fatfs;
。。。。
while(sdcard_init())//检测不到SD卡
      {
            delay_ms(500);
            LED0(led0sta^=1);//DS0闪烁
      }
show_sdcard_info();       //打印SD卡相关信息
sta = f_mount(&fatfs,"0:/",1);
      if (sta)
      {
            printf("SD Card 加载失败错误码： %d \r\n",sta);
            delay_ms(800);
      }
else
   printf("SD Card 加载成功\r\n");

编译下载后果然是打印的sd卡加载成功

发稿与2018年3月13日

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