STM32F103ZET6+4GSDCard+FATFS

ARM学员 · 发表于 2016-11-22 11:31:33

#include "stm32f10x.h"
#include "app_usart_1.h"
#include "app_sd.h"
#include <stdio.h>
#include "ff.h"
#include "diskio.h"

int main(void)
{
static FATFS g_fatfs = {0};
static FIL fil = {0};

char str[24] = {0};
char buf[40] = {0};

int res = 0;

UINT bw = 0;

DWORD count = 0;

app_usart_1_init(38400);

printf("------SD Card Project + SPI Mode------\r\n\r\n");

res = f_mount(&g_fatfs,"1:",1);//Mount immediately.
printf("mount res = %d.\r\n\r\n",res);

res = f_mkfs("1:",0,1024);//FDISK Format
printf("mkfs res = %d.\r\n\r\n",res);

res = f_mount(&g_fatfs,"1:",1);//Mount immediately.
printf("mount res = %d.\r\n\r\n",res);

res = f_setlabel("1:FATFS YL");
printf("setlabel res = %d.\r\n\r\n",res);

res = f_getlabel("1:",str,0);
printf("getlabel res = %d.\r\n\r\n",res);
printf("label:%s\r\n\r\n",str);

disk_ioctl(1,GET_SECTOR_COUNT,&count);
printf("sector count:%luMByte\r\n\r\n",((count*512)/1024)/1024);

res = f_open(&fil,"1:message.txt",FA_CREATE_ALWAYS|FA_WRITE);
printf("open res = %d.\r\n\r\n",res);

res = f_write(&fil,"hello world\r\nestablish in 2016.11.12",36,&bw);
printf("write res = %d.\r\n\r\n",res);

res = f_close(&fil);
printf("close res = %d.\r\n\r\n",res);

res = f_open(&fil,"1:message.txt",FA_OPEN_EXISTING|FA_READ);
printf("open1 res = %d.\r\n\r\n",res);

res = f_read (&fil,buf,36,&bw);
printf("read res = %d.\r\n\r\n",res);

res = f_close(&fil);
printf("close1 res = %d.\r\n\r\n",res);

printf("message.tex:%s\r\n\r\n",buf);

while(1);
}

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

switch (pdrv) {
case MMC :
  result = SD_GetCardInfo(&t_sd_cardinfo);

  switch(cmd)
  {
case CTRL_SYNC:break;
case GET_SECTOR_SIZE:*(DWORD *)buff = 512;break;/* Get sector size(Byte) (needed at _MAX_SS != _MIN_SS) */
case GET_BLOCK_SIZE:*(DWORD *)buff = t_sd_cardinfo.CardBlockSize;break;//512Byte.
case GET_SECTOR_COUNT:*(DWORD *)buff = ((t_sd_cardinfo.CardCapacity*1024)/512);break;
default:result = SD_RESPONSE_FAILURE;break;
  }

  if(result == SD_RESPONSE_NO_ERROR)
  {
return RES_OK;
  }
}
return RES_PARERR;
}

SD_Error SD_GetCardInfo(SD_CardInfo *cardinfo)
{
  SD_Error status = SD_RESPONSE_FAILURE;

  status = SD_GetCSDRegister(&(cardinfo->SD_csd));
  status = SD_GetCIDRegister(&(cardinfo->SD_cid));

  cardinfo->CardCapacity = (cardinfo->SD_csd.DeviceSize + 1) * 512;//KByte.
  cardinfo->CardBlockSize = 512;//Byte.

  /*!< Returns the reponse */
  return status;
}

我目前出现的问题是，执行f_mount()函数总是提示"FR_NO_FILESYSTEM,  /* (13) There is no valid FAT volume */"，f_mkfs()之后再次执行f_mount()函数还是这个提示。但是我把disk_ioctl()函数下"GET_SECTOR_COUNT"命令的返回值改小一点，就没问题了。我的SD卡是4G容量2.0协议的卡，这是怎么回事呢。