关键点在这里 
    // Write '0x00 00 00 00' to any word inside the block to be erased using a "LOAD" instruction.!!!! 
    // so, must to prevent the compiler generator the clr instruction! 
    //count = 0; 
    //*(pDst + 0) = *(&count); 
    //*(pDst + 1) = *(&count); 
    //*(pDst + 2) = *(&count); 
    //*(pDst + 3) = *(&count); 
    *((uint32 *)pDst) = 0x00000000;
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