memory 配置中有给用户盘预留空间，格式化以后却显示用户盘空间为0

请修改mcu\fs\fat\src\Rtfcore.c中以下部分，
#ifndef __FS_CARD_DOWNLOAD__
         // Always ount free clusters right away
         // 1. at system init
         // 2. at FS_LockFAT(FS_REMOUNT_ENUM) or FS_TestMSDC, FS_DEVICE_COUNT_FREE_CLUSTER will be set before call MountRemovableDevice().
         if ((kal_query_systemInit() == KAL_TRUE) ||
             
             (Drive->Dev->DevData.Reserved & FS_DEVICE_COUNT_FREE_CLUSTER))  {
            BatchCountFreeClusters(Drive);
         }
#endif
修改为：
#ifndef __FS_CARD_DOWNLOAD__
         // Always ount free clusters right away
         // 1. at system init
         // 2. at FS_LockFAT(FS_REMOUNT_ENUM) or FS_TestMSDC, FS_DEVICE_COUNT_FREE_CLUSTER will be set before call MountRemovableDevice().
         if ((kal_query_systemInit() == KAL_TRUE) ||
             (Drive->Dev->DeviceNumber == gFS_DeviceNumOfSYSDRV) ||   //添加这样一行
             (Drive->Dev->DevData.Reserved & FS_DEVICE_COUNT_FREE_CLUSTER))  {
            BatchCountFreeClusters(Drive);
         }
#endif