Proteus仿真，使用单片机芯片AT89C51实现电子秒表（51）

#include <reg51.h> #include "LCD1602.h" sbit K1=P2^3; //复位 sbit K2=P2^4; //暂停 sbit K3=P2^5; //恢复 sbit K4=P2^6; //秒表 //unsigned char moshi=0; //用来指示当前处在哪个功能状态 unsigned int timer=0; //系统定时变量 bit moshi=1; unsigned char buzzr_fen=0,buzzr_shi=0;buzzr_miao=0; //秒表时间 unsigned char buzzr[]={"00:01:03"}; //闹钟缓存显示 void delay(unsigned int i) //延时单位为10us { while(i--); } void main() { TMOD|=0X01; //T0工作方式1 TH0=0XfC; //设置初值1ms TL0=0X18; ET0=1; //打开定时器0中断允许 EA=1; //打开总中断 TR0=1; //打开定时器 init_1602(); //LCD1602初始化 write_string(1,0,"TIME:"); write_com(0x0c); //关闭光标 while(1) //主循环 { if(!K4) //按钮1功能切换 { delay(10000); //延时防抖 if(!K4) { buzzr_miao=0; moshi=~moshi; //取反 } while(!K4); //等待按钮松开 } if(!K1) //按钮1功能清0 { delay(1000); //延时防抖 if(!K1) { buzzr_shi=0; buzzr_fen=0; buzzr_miao=0; } while(!K1); //等待按钮松开 } if(!K2) //暂停 { delay(10000); //延时防抖 if(!K2) { TR0=0; } while(!K2); } if(!K3) //继续 { delay(10000); //延时防抖 if(!K3) { TR0=1; } while(!K3); } } } void TIMER0() interrupt 1 //定时器0中断 { TH0=0XfC; //定时1ms TL0=0X18; if(timer<1000) //定时1s timer++; else { timer=0; if(moshi==0) //模式0，倒计时 { if(buzzr_miao>0){ buzzr_miao--; }else if(buzzr_fen>0){ buzzr_miao=59; buzzr_fen--; }else if(buzzr_shi>0){ buzzr_fen=59; buzzr_miao=59; buzzr_shi--; }else{ buzzr_shi=23; buzzr_fen=59; buzzr_miao=59; } buzzr[6]=buzzr_miao/10+0x30;//计算 buzzr[7]=buzzr_miao%10+0x30; buzzr[3]=buzzr_fen/10+0x30;//计算 buzzr[4]=buzzr_fen%10+0x30; buzzr[0]=buzzr_shi/10+0x30;//计算 buzzr[1]=buzzr_shi%10+0x30; write_string(1,5,buzzr);//显示 } if(moshi==1) //模式1，秒表运行 { buzzr_miao++; if(buzzr_miao>59){ buzzr_miao=0;buzzr_fen++; } if(buzzr_fen>59) { buzzr_fen=0; buzzr_shi++; } if(buzzr_shi>23) buzzr_shi=0; } buzzr[6]=buzzr_miao/10+0x30;//计算 buzzr[7]=buzzr_miao%10+0x30; buzzr[3]=buzzr_fen/10+0x30;//计算 buzzr[4]=buzzr_fen%10+0x30; buzzr[0]=buzzr_shi/10+0x30;//计算 buzzr[1]=buzzr_shi%10+0x30; write_string(1,5,buzzr);//显示 } }