SD读写操作完了，返回ｅｍＷｉｎ就死机

lancker · 发表于 2016-10-1 09:39:15

ｅｍＷｉｎ里按下按钮，先关闭中断，对SD操作，返回以后，ｅｍＷｉｎ就触发HardFault_Handler

/////////////////////////////////////////////////////////////////////////////////////////////////////////////
   [mw_shl_code=c,true] case ID_BUTTON_4505: // Notifications sent by 'Button'
   switch(NCode) {
   case WM_NOTIFICATION_CLICKED:
      break;
   case WM_NOTIFICATION_RELEASED:
   hItem = WM_GetDialogItem(hWin, ID_TEXT_4502);
      TEXT_SetText(hItem,"Saving Result to SD!");
GUI_Delay(200);
   __disable_irq();

if(check_SD()==0)
{
if(write_result_to_SD()==0)
{
hItem = WM_GetDialogItem(hWin, ID_TEXT_4502);
TEXT_SetText(hItem,"Save successfully!");
}
else
{
TEXT_SetText(hItem,"Test result writes error!");
}
}
else
{
TEXT_SetText(hItem,"SD Error");
}

__enable_irq();
GUI_Delay(500);
      break;[/mw_shl_code]

下面上面调用的两个函数。
/////////////////////////////////////////////////////////////////////////////////////////////////////////////
[mw_shl_code=c,true]int check_SD(void)
{
      u32 total,free;
   u8 i;
   int flag=0;
   i=5;
   while(i)                   //检测SD卡
{
      if(SD_Initialize())
      {
      delay_ms(100);
      i--;
      flag=1;
      }
      else
         i=0;
}
if(flag!=0) return flag;
   exfuns_init();                         //为fatfs相关变量申请内存
f_mount(fs[0],"0:",1);                   //挂载SD卡
   //f_mount(fs[1],"1:",1);                   //挂载FLASH.
  i=5;

while(i) //得到SD卡的总容量和剩余容量
{
      if(exf_getfree("0",&total,&free))
      {
      delay_ms(200);
      i--;
      flag=2;
      }
      else
         i=0;
}
  if(flag!=0)
{LED_B=1;LED_R=0;return flag; }
else
{

LCD_ShowString(30,180,200,16,16,"SD Test Ok. Free Size:    MB");
LCD_ShowNum(220,180,free>>10,5,16);                      //显示SD卡剩余容量 MB
delay_ms(200);
f_mount(NULL, "", 0);
return flag;
}

}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////
int write_result_to_SD(void)
{
   int flag=0;
   uint8_t res;
   u8 i,k;
   FATFS fs;
   uint32_t index = 0x00;
uint32_t reindex = 0x00;
   char buf[2000] = "\0";
   uint8_t str[15];

char name[50] = "TestData_";
   pht_read_test_result();
   delay_ms(1000);

   RTC_get_date(str,0);
   for(i=0;i<10;i++)
         name[9+i]=str;
   name[19]='_';
   RTC_get_time(str,1);
for(i=0;i<6;i++)
      name[20+i]=str;
   name[26]='.';
      name[27]='t';
   name[28]='x';
   name[29]='t';
      name[30]='\0'; //TestData_2016-07-17_202512.dat

res = f_mount(&fs, "", 0);

if(res != FR_OK)
{
         LCD_ShowString(30,180,200,16,16,"file mount error!");
         flag=1;
         delay_ms(1000);
         return flag;
}
         LCD_ShowString(30,180,200,16,16, "file mount successful!");
         delay_ms(1000);

   res = f_open(file,(const TCHAR *)name,FA_READ | FA_WRITE | FA_CREATE_NEW );
if(res == FR_OK)
{
         LCD_ShowString(30,180,200,16,16, "file open sucessfully!");
         delay_ms(1000);
      }
      else
      {

         LCD_ShowString(30,180,200,16,16,"file open error!");
         flag=2;
         delay_ms(1000);
         return flag;
      }

      index=2000;

      for(i=0;i<50;i++)
      {


         sprintf(buf,"%s","--Record-");

         if(rec.RecFlag==0x88)
         {
         sprintf(buf,"%s%2d%s",buf,i,"--\r\n");
         sprintf(buf,"%s%s",buf,rec.TestNr);
         sprintf(buf,"%s%s",buf,"\r\n");
         sprintf(buf,"%s%4d",buf,rec.Pres);
         sprintf(buf,"%s%s",buf,"\r\n");
         sprintf(buf,"%s%2d",buf,rec.PresDrL);
         sprintf(buf,"%s%s",buf,"\r\n");
         sprintf(buf,"%s%1d",buf,rec.TDur);
         sprintf(buf,"%s%s",buf,"\r\n");
         sprintf(buf,"%s%8d%4d",buf,rec.RDate,rec.RTime);
         sprintf(buf,"%s%s",buf,"\r\n");
         sprintf(buf,"%s%1d",buf,rec.TResult);
         sprintf(buf,"%s%s",buf,"\r\n");
         sprintf(buf,"%s%s",buf,rec.Tester);
         sprintf(buf,"%s%s",buf,"\r\n");
         for(k=0;k<21;k++)
            sprintf(buf,"%s%4d%s",buf,rec.PresRec[k]," ");

         sprintf(buf,"%s%s",buf,"\r\n\r\n\0");
         }
         else
         {
         sprintf(buf,"%s%2d%s",buf,i,"--\r\n");
         sprintf(buf,"%s%s",buf,"This record is blank!\r\n");
         sprintf(buf,"%s%s",buf,"\r\n\0");
         }
         //index=sizeof(buf)-1;
         index=strlen(buf);
         res = f_write(file,buf,index, &reindex);
   }
      if((res == FR_OK)&&(reindex == index))
{
         LCD_ShowString(30,180,200,16,16,"file saved successfully!");
         delay_ms(1000);
         f_close(file);

      }
      else
      {
         LCD_ShowString(30,180,200,16,16, "file save failed!");
         flag=3;
         delay_ms(1000);
         f_mount(NULL, "", 0);
      return flag;
      }

      /* 解除 SD 卡的逻辑驱动挂载 */
      delay_ms(1000);
f_mount(NULL, "", 0);
      return flag;
}[/mw_shl_code]