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这样的SCI,怎样才能进入中断?

Other Parts Discussed in Thread: CONTROLSUITE

使用SCI接收485数据,并处理break。现在程序进入不了中断,

寄存器状态是这样的:

现在状态寄存器的值是0x00b2,需要个计数变量,在这时记录break的发生,以进入其它处理。

可是,进不了中断。

谢谢大家