利用单片机实现键控看门狗

/*************** writer:shopping.w ******************/ #include <reg52.h> #define uchar unsigned char #define uint unsigned int sfr WDRST = 0xA6; sbit LED1 = P0^0; sbit LED2 = P0^1; sbit K1 = P1^4; void DelayMS(uint ms) { uchar i; while(ms--) { for(i=0;i<120;i++); } } void main() { LED1 = 0; LED2 = 1; DelayMS(2000); TMOD = 0x01; TH0 = -16000/256; TL0 = -16000%256; IE = 0x82; WDRST = 0x1E; WDRST = 0xE1; while(1) { if(K1==0) { TR0 = 0; LED1 = 1; LED2 = ~LED2; DelayMS(200); } } } void Timer0() interrupt 1 { TH0 = -16000/256; TL0 = -16000%256; WDRST = 0x1E; WDRST = 0xE1; }