急求LM3S2965的FLASH问题

syp910

void FlashEEPROM_Write(unsigned char BlkAddr,unsigned short usAddr,unsigned char cData)
{
        unsigned char cBuf[1024];
        unsigned long *pulData=(unsigned long *)(cBuf);
        cBuf[usAddr&0x03ff]=cData;
        FlashErase(BlkAddr*1024);
        FlashProgram(pulData,BlkAddr*1024,1024);       
}


主程序多次调用上函数，出现莫名进入死循环中，只能进入终端函数，急求问题解决