单片机与数码管做的秒表

/*AT89S52 晶振：11.0592MHZ 引脚连接方式见下面定义，该程序经过我仔细调试，只要连接上即可直接运行，*/ #include<reg52.H> #include <intrins.h> #define seg_data P0 //数码管显示数据输出端口 sbit K1 = P1^4; //按键引脚定义 sbit K2 = P1^5; sbit K3 = P1^6; sbit bit1 = P2^0; //数码管位选通端口定义 sbit bit2 = P2^1; sbit bit3 = P2^2; /*共阳数码管0-9 */ const unsigned char seg[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; unsigned char seg_data1=0,seg_data2=0,seg_data3=0,delaytime=0; struct boolean_variable //定义布尔型变量，每个变量只占用一个bit RAM { char a :1; char b :1; char c :1; char d :1; char e :1; char f :1; }variable1; char code reserve[3]_at_ 0x3b; //保留0x3b开始的3个字节 /****************************************************************************** 定时器初始化 ******************************************************************************/ void time0_time1_initialize() { TMOD=0X11; //T0模式1，T1模式1 相当于00010001B ET0=1; //T0开中断 ET1=1; //T1开中断 PT0=1; //T0为高优先级 PT1=0; //T1为低优先级 EA=1; //中断总开关打开 TH1=0XF8; ////T1装入初值，实现2ms定时 TL1=0XCC; TH0=0X4C; //T0装入初值，实现50ms定时 TL0=0X00; TR1=1; //开启T1 } #define bit1_shanshuo variable1.c #define bit2_shanshuo variable1.d #define bit3_shanshuo variable1.e #define jishu_key variable1.f /****************************************************************************** 动态扫描显示程序 ******************************************************************************/ unsigned int judge_segdata=1; void seg_display() { if (jishu_key == 1) { if (judge_segdata > 3) judge_segdata =1; switch (judge_segdata) { case 1: seg_data=seg[seg_data1];bit1 = 0;bit2 = 1;bit3 = 1;break; case 2: seg_data=seg[seg_data2];bit1= 1;bit2 = 0;bit3 = 1;break; case 3: seg_data=seg[seg_data3];bit1 = 1;bit2 = 1;bit3 = 0;break; } goto S; } if (jishu_key == 0) { if (judge_segdata >200) judge_segdata =1; if (bit1_shanshuo == 1) { if(judge_segdata<100) { switch (judge_segdata%4) { case 1: seg_data=seg[seg_data1];bit1 =1;bit2 = 1;bit3 = 1;break; case 2: seg_data=seg[seg_data2];bit1= 1;bit2 = 0;bit3 = 1;break; case 3: seg_data=seg[seg_data3];bit1 = 1;bit2 = 1;bit3 = 0;break; } goto S; } else { switch (judge_segdata%4) { case 1: seg_data=seg[seg_data1];bit1 = 0;bit2 = 1;bit3 = 1;break; case 2: seg_data=seg[seg_data2];bit1= 1;bit2 = 0;bit3 = 1;break; case 3: seg_data=seg[seg_data3];bit1 = 1;bit2 = 1;bit3 = 0;break; } goto S; } } if (bit2_shanshuo == 1) { if(judge_segdata<100) { switch (judge_segdata%4) { case 1: seg_data=seg[seg_data1];bit1 =0;bit2 = 1;bit3 = 1;break; case 2: seg_data=seg[seg_data2];bit1= 1;bit2 = 1;bit3 = 1;break; case 3: seg_data=seg[seg_data3];bit1 = 1;bit2 = 1;bit3 = 0;break; } goto S; } else { switch (judge_segdata%4) { case 1: seg_data=seg[seg_data1];bit1 = 0;bit2 = 1;bit3 = 1;break; case 2: seg_data=seg[seg_data2];bit1= 1;bit2 = 0;bit3 = 1;break; case 3: seg_data=seg[seg_data3];bit1 = 1;bit2 = 1;bit3 = 0;break; } goto S; } } if (bit3_shanshuo == 1) { if(judge_segdata<100) { switch (judge_segdata%4) { case 1: seg_data=seg[seg_data1];bit1 =0;bit2 = 1;bit3 = 1;break; case 2: seg_data=seg[seg_data2];bit1= 1;bit2 = 0;bit3 = 1;break; case 3: seg_data=seg[seg_data3];bit1 = 1;bit2 = 1;bit3 = 1;break; } goto S; } else { switch (judge_segdata%4) { case 1: seg_data=seg[seg_data1];bit1 = 0;bit2 = 1;bit3 = 1;break; case 2: seg_data=seg[seg_data2];bit1= 1;bit2 = 0;bit3 = 1;break; case 3: seg_data=seg[seg_data3];bit1 = 1;bit2 = 1;bit3 = 0;break; } goto S; } } } S: judge_segdata++; } /****************************************************************************** 定时计数器1的中断服务子程序， 用于定时扫描数码管 ******************************************************************************/ unsigned char dc1=1; void time1_interrupt() interrupt 3 using 2 { TH1=0XF8; //T1重新装入初值 TL1=0XCC; dc1++; if (dc1 == 40) //200ms到了？数码管计数加1 { dc1 = 0; if (jishu_key == 1) { seg_data1++; if (seg_data1 == 10) { seg_data1 = 0; seg_data2++; } if (seg_data2 == 10) { seg_data2 = 0; seg_data3++; } if (seg_data3 == 10) seg_data3 = 0; } } seg_display(); } #define second variable1.a static unsigned char dc2=0; /****************************************************************************** 定时计数器0的中断服务子程序， 用于定时扫描数码管 ******************************************************************************/ void time0_interrupt() interrupt 1 using 3 { TH0=0X4C; //T0装入初值，继续50ms定时 TL0=0X00; dc2++; //50ms计数变量加1 if (dc2 == delaytime) //2s到了？ { second = 1; //布尔型变量second置位 dc2=0; } } /****************************************************************************** 延时程序 ******************************************************************************/ void delay(int time0) { unsigned char i; for(;time0 >= 0;time0--) { for(i=0;i<120;i++); } } /****************************************************************************** 按键执行程序 ******************************************************************************/ #define timedelay1 50 void key_function() { unsigned char j=1; bit1_shanshuo = 1; //数码管第一位闪烁 delay(500); //延时500ms delaytime = 100 ; //定时器0 定时100*50ms = 5000ms=5s TH0=0X4C; TL0=0X00; TR0 = 1; //开启T0,定时5s while(!second) //如果5秒内没有按键，则按键设置程序返回 { if (K1 == 0) { dc2 = 0; //清零T0十秒计数变量 j++; } if (j > 3) j=1; switch (j) { case 1:bit1_shanshuo = 1;bit2_shanshuo = 0;bit3_shanshuo = 0;break; case 2:bit1_shanshuo = 0;bit2_shanshuo = 1;bit3_shanshuo = 0;break; case 3:bit1_shanshuo = 0;bit2_shanshuo = 0;bit3_shanshuo = 1;break; default: break; } if (K2 == 0) { dc2 = 0; //清零T0十秒计数变量 switch (j) { case 1: seg_data1++;if (seg_data1>9) seg_data1=0;break; case 2: seg_data2++;if (seg_data2>9) seg_data2=0;break; case 3: seg_data3++;if (seg_data3>9) seg_data3=0;break; } } if (K3 == 0) { dc2 = 0; //清零T0十秒计数变量 switch (j) { case 1: seg_data1--;if (seg_data1>9) seg_data1=0;break; case 2: seg_data2--;if (seg_data2>9) seg_data2=0;break; case 3: seg_data3--;if (seg_data3>9) seg_data3=0;break; } } delay(400); //延时400ms } jishu_key = 1; //数码管继续计数 TR0 = 0; dc2=0; second=0; } /****************************************************************************** K1键扫描程序 ******************************************************************************/ void key_press() { if (K1 == 0) //key1按下？ { jishu_key = 0; //数码管停止计数 delaytime = 40; //定时器1定时40*50ms = 2s TH0=0X4C; TL0=0X00; TR0 = 1; //T0开始定时 delay(10); //消除键盘抖动 while (!K1) //等待 { bit1 = 1;bit2 = 1;bit3 = 1; if (second == 1)//两秒计数变量为1？ { TR0 = 0; //关闭T0 dc2=0; second = 0; key_function(); return; } } TR0 = 0; dc2=0; jishu_key=1; } } void main() { K1 = 1; K2 = 1; K3 = 1; second = 0; jishu_key = 1; bit1_shanshuo =0; bit2_shanshuo =0; bit3_shanshuo =0; time0_time