#include #include sbit P20=P2^0; //sbit P01=P0^1; //sbit P02=P0^2; //sbit P07=P0^7; code timer[]={ char unsigned char count=0; unsigned 28,28,29,29,30,30,30,31,31,31, 32,32,33,33,33,34,34,34,35,35, 36,36,36,37,37,37,38,38,38,39, 39,39,40,40,40,41,41,41,42,42, 42,43,43,43,43,44,44,44,44,45, 45,45,45,46,46,46,46,47,47,47, 47,47,47,48,48,48,48,48,48,49, 49,49,49,49,49,49,49,49,50,50, 50,50,50,50,50,50,50,50,50,50, 50,50,50,50,50,50,50,50,50,50, 50,50,49,49,49,49,49,49,49,49, 49,48,48,48,48,48,48,47,47,47, 47,47,47,46,46,46,46,45,45,45, 45,44,44,44,44,43,43,43,43,42, 42,42,41,41,41,40,40,40,39,39, 39,38,38,38,37,37,37,36,36,36, 35,35,34,34,34,33,33,33,32,32, 31,31,31,30,30,30,29,29,28,28, 28,27,27,26,26,26,25,25,24,24, 24,23,23,23,22,22,21,21,21,20, 20,20,19,19,19,18,18,18,17,17, 16,16,16,16,15,15,15,14,14,14, 13,13,13,12,12,12,12,11,11,11, 11,10,10,10,10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9,10,10,10,10,11, 11,11,11,12,12,12,12,13,13,13, 14,14,14,15,15,15,16,16,16,16, 17,17,18,18,18,19,19,19,20,20, 

20,21,21,21,22,22,23,23,23,24, 24,24,25,25,26,26,26,27,27,28}; void main(void){ // TMOD=0000 0110B,使用计数器 T0 的模式 2 //开总中断 //允许定时器 T0 的中断 //允许外中断 INT0 //INT0 为下负脉冲触发方式 TMOD=0x02; EA=1; ET0=1; EX0=1; IT0=1; TH0=TL0=256-timer[0]; TR0=1; P20=1; while(1); //启动 T0 } void Key_counter() interrupt 1 using 0 { if(P20==1){ P20=0; TL0=200+timer[count]; //256-(56-timer[]) TH0=200+timer[count]; if(count==359){ count=0; } } else{ P20=1; TL0=256-timer[++count]; TH0=256-timer[++count]; } }