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HalFlashWrite(uint16 addr, uint8 *buf, uint16 cnt)中buf的类型是无符号字符型的，可是我的程序中要存储有符号整型的，调用时就除了问题，我该怎么解决呢
想到了，用sprintf函数，把数据放到一个字符数组里，就行了
