非中断方式实现按键控制LED灯

//非中断方式实现按键控制LED灯/*1：全部灯熄灭2：按下按键SW1不超过一秒后松开LED灯亮3：再次按下灯灭*/#include#define uint unsigned int#define uchar unsigned char#define LED P1_0void Initial(void){P1SEL&=~0x39;P1DIR|=0x39;P1SEL&=~0x04;//P1_2为通用IO口P1DIR&=~