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28035SCI数据接收错误

我用串口助手给DSP发送8个字节数据,11 22 33 44 55 66 77 88 ,DSP采用FIFO中断接收,每4个字节产生一次中断,一开始数据接收正常,但当我把11改成1(不是01),这样就接收不正常,这个我理解,但当我把1改回11后,接收还是不正常。当我把11改成1后发现上位机发完数据后,接收FIFO状态寄存器居然显示有数据(正常应该没有),但是当我在软件中复位SCI,依然没用。请问下各位同行有没有遇到这种情况啊?谢谢了

-----PS(11改成1格式不对接收肯定不对)