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我在使用TM4C1230d5pm的串口的时候,我开了发送中断和接收中断,但我发现接收中断能进入中断处理程序,但发送中断要发送一定的字符才能进入,发送一个字符的时候就进不去?

Other Parts Discussed in Thread: TM4C1230D5PM

如题,我该怎么修改,才能在发送一个字符的时候,进入中断处理程序