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mspf149

lu su
Prodigy 80 points


P1口做中断按键检测时，P1SEL=0X00,P1DIR=0X00,P1IES=0XFF,P1IE=0XFF;P1IFG=0X00.上电后P1引脚电压为1.3V，按键按下拉低，不触发中断。请问怎么办？按键按下拉高（改成上跳沿触发）也不触发中断请问怎么办？