51单片机学习之简易时钟
51单片机学习之简易时钟使用芯片STC89C52RC, 2个锁存器
6个带小数点共阴极数码管显示一个24时制时钟
没有时钟芯片,所以掉电后时间会复位
原理图为TX-1C开发板
暂时显示了半小时,一秒不差,
未验证有无其他bug,代码贴上来,欢迎高手指点
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最终显示的<时.分.秒>是 16.31.37形式
#include <reg52.h>#include "MY51.H"void show();uint8shi=15; //初始时间15:45:00按复位按钮对时uint8fen=45;uint8miao=0;void main(){startT0(1000);//开始定时器while(1){show();}}void show()//显示时钟{uint8 oneWela,twoWela,threeWela,foreWela,fiveWela,sixWela; //oneWela是最左边的数码管sixWela =miao%10;fiveWela=miao/10;foreWela=fen%10;threeWela=fen/10;twoWela=shi%10;oneWela=shi/10;displaySMG(oneWela,twoWela,threeWela,foreWela,fiveWela,sixWela,0xf5); //0xf5小数点位置}void T0_Work()//T0定时器调用的工作函数{miao++;if(miao>59){miao=0;fen++;}if(fen>59){fen=0;shi++;}if(shi>23){shi=0;}}
#ifndef _MY51_H_#define _MY51_H_#include <math.h>#include <intrins.h>typedef int int16;typedef int INT16;typedef unsigned int uint16 ;typedef unsigned int UINT16 ;typedef unsigned shortuint ;typedef unsigned shortUINT ;typedef unsigned shortword ;typedef unsigned shortWORD ;typedef unsigned long uint32 ;typedef unsigned long UINT32 ;typedef unsigned long DWORD ;typedef unsigned long dword ;typedef signed long int32 ;typedef signed long INT32;typedef float float32 ;typedef double double64;typedef signed char int8 ;typedef signed char INT8 ;typedef unsigned char byte ;typedef unsigned char BYTE ; //WINDOWS的windef.h里面是这么定义的typedef unsigned char uchar ;typedef unsigned char UCHAR ;typedef unsigned char UINT8 ;typedef unsigned char uint8 ;typedef unsigned char BOOL ; //windows中定义BOOL为inttypedef unsigned char bool ; //bool是c++的内置类型#define TRUE 1#define true 1#define FALSE 0#define false 0#define open 1 //open和close用于 标志打开和关闭状态#define OPEN 1#define close 0#define CLOSE 0#define lock 0#define start 1#define START 1#define stop 0#define STOP 0uint8 dulaIndex=0; //数码管0~F段编码索引号uint8 welaIndex=0; //0~5位的数码管位索引号sbit dula =P2^6;//段选锁存器控制控制笔段sbit wela =P2^7;//位选锁存器控制控制位置#define led P1 //灯总线控制sbit led0=P1^0; //8个led灯sbit led1=P1^1;sbit led2=P1^2;sbit led3=P1^3;sbit led4=P1^4;sbit led5=P1^5;sbit led6=P1^6;sbit led7=P1^7;sbit keyS2=P3^4; //4个独立按键sbit keyS3=P3^5;sbit keyS4=P3^6;sbit keyS5=P3^7;void displaySMG(uint8 one,uint8 two,uint8 three,uint8 four,uint8 five,uint8 six,uint8 dot);void delayms(uint16 ms);void T0_Work();//void delayms(uint16 ms)//软延时函数{uint16 i,j;for(i=83;i>0;i--){for(j=ms;j>0;j--){}}}///#define dark 0x11//也就是索引第17号元素0x00,共阴极数码管正极全部输入低电平uint8 code table[]= { //0~F外加小数点和空输出的数码管编码0x3f , 0x06 , 0x5b , 0x4f , // 0 1 2 30x66 , 0x6d , 0x7d , 0x07 , // 4 5 6 70x7f , 0x6f , 0x77 , 0x7c , // 8 9 A B0x39 , 0x5e , 0x79 , 0x71 , // C D E F0x80 , 0x00 // . 空 空时是第0x11号也就是第17号元素};/uint8 TH0Cout=0 ; //初值uint8 TL0Cout=0 ;uint16T0IntCout=0; //中断计数uint16T0IntCountAll=0; //(N-1)/65536+1;//总中断次数bool bT0Delay=false;//使用延时函数标志,初始未用bool bT0Over=false; //中断处理函数执行结果之一void startT0(uint32 ms)//开启定时器{float32 t=ms/1000.0; //定时时间double64 fox =11.0592*(pow(10,6));//晶振频率uint32 N=(t*fox)/12 ; //定时器总计数值TH0Cout =(65536-N%65536)/256; //装入计时值零头计数初值TL0Cout =(65536-N%65536)%256;T0IntCountAll=(N-1)/65536+1; //总中断次数TMOD=TMOD | 0x01; //设置定时器0的工作方式为1EA =open; //打开总中断ET0=open; //打开定时器中断TH0=TH0Cout;//定时器装入初值TL0=TL0Cout;TR0=start; //启动定时器}void delayT0(uint32 ms) //硬延时函数,自己乱写的不好用,求指点{startT0(ms); //启动定时器bT0Delay=true; //告诉T0定时器,起用延时模式while(bT0Over==false); //时间没到的话继续检测bT0Over=false; //时间到了,让标志复位}void T0_times() interrupt 1 //T0定时器中断函数{T0IntCout++;if(T0IntCout==T0IntCountAll)//达到总中断次数值{T0IntCout=0; //中断次数清零,重新计时bT0Over=true; //时间真的到了if(bT0Delay) //本次中断是用来延时的吗{TR0=stop; //如果是由延时函数开启T0的话,关闭T0return;}TH0=TH0Cout; //循环定时的话要重装初值,每次定时1秒,重装一次TL0=TL0Cout;T0_Work(); //工作函数}}void displaySMG(uint8 oneWela,uint8 twoWela,uint8 threeWela,uint8 fourWela,uint8 fiveWela,uint8 sixWela,uint8 dot){ //控制6位数码管显示函数,不显示的位用参数 darkdula=1; //小数点P0=table;dula=0;P0=0xff;wela=1;P0=dot;wela=0;delayms(1);dula=1;P0=table; //送段数据dula=0;P0=0xff; //送位数据前关闭所有显示，防止打开位选锁存后段选数据通过位选锁存器wela=1;P0=0xfe;wela=0;delayms(1);dula=1;P0=table;dula=0;P0=0xff;wela=1;P0=0xfd;wela=0;delayms(1);dula=1;P0=table;dula=0;P0=0xff;wela=1;P0=0xfb;wela=0;delayms(1);dula=1;P0=table;dula=0;P0=0xff;wela=1;P0=0xf7;wela=0;delayms(1);dula=1;P0=table;dula=0;P0=0xff;wela=1;P0=0xef;wela=0;delayms(1);dula=1;P0=table;dula=0;P0=0xff;wela=1;P0=0xdf;wela=0;delayms(1);}#endif 谢谢分享！ 看看，学习一下。 格式太乱了吧，看的头晕！
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