简易秒表

来源：互联网发布：用织梦cms侵权编辑：程序博客网时间：2024/06/11 13:40
实现功能有
1：暂停
2：暂停继续继续计时
3：复位
#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义#define DataPort P1 //定义数据端口 程序中遇到DataPort 则用P0 替换sbit LATCH1=P2^2;//定义锁存使能端口 段锁存sbit LATCH2=P2^3;//                 位锁存sbit key1 = P0^0;sbit key2 = P0^1;sbit key3 = P0^2;sbit key4 = P0^3;sbit key5 = P0^4;sbit key6 = P0^5;sbit key7 = P0^6;sbit key8 = P0^7;unsigned char code dofly_DuanMa[12]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0X00,0X00};// 显示段码值0~9unsigned char code dofly_WeiMa[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//分别对应相应的数码管点亮,即位码unsigned char TempData[8]; //存储显示值的全局变量void Delay(unsigned int t); //函数声明void Display(unsigned char FirstBit,unsigned char Num);unsigned char sec = 0;unsigned char msec = 0;unsigned char min = 0;unsigned char hour = 0;unsigned char count = 0;unsigned char flag = 1;void delayms(unsigned char n){while(n--){Delay(245);Delay(245);}}void time0_isr(void) interrupt 1{EA = 0;TH0 = 0xd8;TL0 = 0xf0; msec++;  if(msec == 100){msec = 0;sec++;}if(sec == 60){sec = 0;min++;}if(min == 60){min = 0;}EA = 1;}void push_button(){if(!key5) //暂停{delayms(10);if(!key5){while(!key5);EA = 0;}}/*if(!key1)//1{delayms(10);if(!key1){while(!key1);sec++;if(sec == 60){sec = 0;min++;}}   }if(!key2) //2{delayms(10);if(!key2){while(!key2);sec--;if(sec == 255){sec = 59;min--;}}}if (!key3)//3{delayms(10);if(!key3){while(!key3);min++;if(min == 60){min = 0;hour++;}}}if(!key4)//4{min--;if(min == 255){min = 59;hour--;}}*/if(!key7) //5 暂停之后再开始{flag = 0;EA = 1;}if(!key6)//6   //复位{sec = 0;min = 0;hour = 0;flag = 0;EA = 1;}}/*------------------------------------------------                    主函数------------------------------------------------*/void main(void)  { TMOD = 0x01; TL0 = 0xf0; TH0 = 0xd8; EA = 1; ET0 = 1; TR0 = 1;   while(1)      {      TempData[7] = dofly_DuanMa[msec%10];//分解显示信息，TempData[6] = dofly_DuanMa[msec/10];TempData[5] = dofly_DuanMa[11];TempData[4] = dofly_DuanMa[sec%10];TempData[3] = dofly_DuanMa[sec/10];   TempData[2] = dofly_DuanMa[10];TempData[1] = dofly_DuanMa[min%10];TempData[0] = dofly_DuanMa[min/10];     //如要显示68，则68/10=6  68%10=8     Display(0,8);push_button();      }}/*------------------------------------------------ 延时函数，含有输入参数 unsigned int t，无返回值 unsigned int 是定义无符号整形变量，其值的范围是 0~65535------------------------------------------------*/void Delay(unsigned int t){ while(--t);}/*------------------------------------------------ 显示函数，用于动态扫描数码管 输入参数 FirstBit 表示需要显示的第一位，如赋值2表 示从第三个数码管开始显示 如输入0表示从第一个显示。 Num表示需要显示的位数，如需要显示99两位数值则该值输入2------------------------------------------------*/void Display(unsigned char FirstBit,unsigned char Num){      unsigned char i;    for(i=0;i<Num;i++)   {    DataPort=0;   //清空数据，防止有交替重影       LATCH1=1;     //段锁存       LATCH1=0;       DataPort=dofly_WeiMa[i+FirstBit]; //取位码        LATCH2=1;     //位锁存       LATCH2=0;       DataPort=TempData[i]; //取显示数据，段码       LATCH1=1;     //段锁存       LATCH1=0;          Delay(200); // 扫描间隙延时，时间太长会闪烁，               //太短会造成重影       }}
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