fatfs文件系统新建文件程序卡死

zb0918 · 发表于 2016-2-25 11:39:04

int main(void)
{
FIL fil;
      FATFS fs;
      FRESULT res;

SystemInit();
Usart_Configuration();
delay_init(72);
NVIC_Configuration();
SD_Init();
delay_ms(10);
//disk_initialize(0);
f_mount(0, &fs);

      f_open(&fil,"temp_save.txt",FA_READ);
      std_file(fil,20);
      f_close(&fil);

printf("\n ok! \n");

for(;;);
}

int *std_file(FIL n, int length)
{
FIL out;
int i=0;
int j=0;
int mean[3]={0,0,0};
int *miu;
int temp;
int *o = 0;

char pBuf[30];
char mBuf[30];
char *data_new;
char *mean_new;
int temp2;

      printf("\n  指示1  \n");
      f_open(&out,"std_save.txt",FA_CREATE_ALWAYS);
f_close(&out);
      printf("\n  指示1。1  \n");
      f_open(&out,"std_save.txt",FA_WRITE);

      printf("\n  指示1.2  \n");
........
........
}
程序如上，这样只能打印出：指示1
如果把这段代码放到主函数里面就能正常运行，，，请问这是什么原因啊？
printf("\n  指示1  \n");
      f_open(&out,"std_save.txt",FA_CREATE_ALWAYS);
f_close(&out);
      printf("\n  指示1。1  \n");
      f_open(&out,"std_save.txt",FA_WRITE);

      printf("\n  指示1.2  \n");