求解答，stm32 sd卡使用fatfs文件管理，在调用f_open函数时返回12号错误

风飞羊 · 发表于 2020-12-19 00:51:01

stm32 sd卡使用fatfs文件管理，在调用f_open函数时返回12号错误，FR_NOT_ENABLED, /* (12) The volume has no work area */
以下为源代码
#include "led.h"
#include "delay.h"
#include "usart.h"
#include "malloc.h"
#include "MMC_SD.h"
#include "diskio.h"
#include "integer.h"
#include "stm32f10x.h"
#include "ffconf.h"
#include "ff.h"
u8 buff[128];
u8 read_buffer[128];
FIL fill;
UINT br,bw;
FATFS *fs;
static FRESULT res;

int main(void)
{
int i=0;
u8 t=0;

      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
delay_init();
uart_init(115200);
LED_Init();
mem_init();

while(SD_Initialize())
{
delay_ms(500);
delay_ms(500);
LED0=!LED0;
}

printf("SD Card OK ");
printf("SD Card Size:    MB");

   delay_ms(1000);

   res = f_mount(fs,"0:",1);                                  //
      if(res != RES_OK)
      {
            printf("f_mount error!\r\n");
      delay_ms(500);
}
   else {
      printf("f_mount successful!\r\n");
   }

   res = f_open(&fill,"0:/test.txt",FA_READ | FA_WRITE | FA_CREATE_ALWAYS);

delay_ms(500);
   if(res!=RES_OK)
   {
            t=res;
            printf("open %d  ",t);
   }
   else{
         printf("f_open succeed");
   }
   delay_ms(500);

   for(i = 0;i < 128;i++)
      {
            buff[i] = i % 256;
      }
      res = f_write(&fill,buff,128,&bw);

      if(res!=RES_OK)
      {
            t=res;
            printf("write %d  ",t);
   }
   else{
      printf("f_write succeed");
   }
   delay_ms(500);

      res = f_read(&fill,read_buffer,128,&br);
      if(res != RES_OK || br != 128)
   {
         t=res;
         printf("read %d  ",t);
      }
      else{
            printf("f_read successful!\r\n");
      }

delay_ms(500);
      f_close(&fill);

   for(i=0;i<128;i++)
{
printf("%d ",read_buffer[i]);
}
delay_ms(1000);
while(1)
{
         LED0=!LED0;
      delay_ms(1000);
}
}