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不管IO设置成上升沿还是下降沿触发，按键都只会在下降沿触发中断。而且打断点发现，不管什么触发方式，一次按键按下松开，均会导致两次进入中断。
应该不会。你是不是IO配置有问题。给你一个IO口配置，你可以参考一下。
/*****************************************************************************接收使能中断p0.0******************************************************************************/void RxEnableInterruptInit(void){ P0SEL &= ~BV(0); P0DIR &= ~BV(0); P0INP &= ~BV(0); P0IEN |= BV(0); //中断使能 P2INP &= ~BV(5);//端口模式上拉 //PICTL &= ~(0x1 << 0);//上升沿中断改为下降沿 PICTL |= (0x1 << 0); IEN1 |= (0x1 << 5);//端口0中断使能 P0IFG = 0; P0IF = 0; return;}
