多谢楼上两位了，现在测出老是出现溢出错误，手册上说，The receive FIFO buffer can hold two characters. Anoverrun error will be generated If a third character, in its entirety, is received before the FIFO is accessed. When this happens the OERR bit of the RCSTA register is set.
要是在访问FIFO之前接收到了完整的三个字符，将会产生溢出错误，现在问题很有可能是yewuyi老大说的第6点原因，多谢了，
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