单片机实时时钟电路（LCD1602、DS1302）
想要更多项目私wo!!!
一、简介
此电路主要有51单片机、LCD1602模块、DS1302芯片组成，通过LCD1062显示当前时间。
二、运行效果
三、源文件
main.c
/*想要更多项目私wo!!!*/#include <reg52.h>#include <intrins.h>#include <string.h>#define uint unsigned int#define uchar unsigned charsbit IO = P1^0;sbit SCLK = P1^1;sbit RST = P1^2;sbit RS = P2^0;sbit RW = P2^1;sbit EN = P2^2;uchar *WEEK[]={"SUN","***","MON","TUS","WEN","THU","FRI","SAT"};uchar LCD_DSY_BUFFER1[]={"DATE 00-00-00 "};uchar LCD_DSY_BUFFER2[]={"TIME 00:00:00 "};uchar DateTime[7];void DelayMS(uint ms){uchar i;while(ms--){for(i=0;i<120;i++);}}void Write_A_Byte_TO_DS1302(uchar x){uchar i;for(i=0;i<8;i++){IO=x&0x01;SCLK=1;SCLK=0;x>>=1;}}uchar Get_A_Byte_FROM_DS1302(){uchar i,b=0x00;for(i=0;i<8;i++){b |= _crol_((uchar)IO,i);SCLK=1;SCLK=0;}return b/16*10+b%16;}uchar Read_Data(uchar addr){uchar dat;RST = 0;SCLK=0;RST=1;Write_A_Byte_TO_DS1302(addr);dat = Get_A_Byte_FROM_DS1302();SCLK=1;RST=0;return dat;}void GetTime(){uchar i,addr = 0x81;for(i=0;i<7;i++){DateTime[i]=Read_Data(addr);addr+=2;}}uchar Read_LCD_State(){uchar state;RS=0;RW=1;EN=1;DelayMS(1);state=P0;EN = 0;DelayMS(1);return state;}void LCD_Busy_Wait(){while((Read_LCD_State()&0x80)==0x80);DelayMS(5);}void Write_LCD_Data(uchar dat){LCD_Busy_Wait();RS=1;RW=0;EN=0;P0=dat;EN=1;DelayMS(1);EN=0;}void Write_LCD_Command(uchar cmd){LCD_Busy_Wait();RS=0;RW=0;EN=0;P0=cmd;EN=1;DelayMS(1);EN=0;}void Init_LCD(){Write_LCD_Command(0x38);DelayMS(1);Write_LCD_Command(0x01);DelayMS(1);Write_LCD_Command(0x06);DelayMS(1);Write_LCD_Command(0x0c);DelayMS(1);}void Set_LCD_POS(uchar p){Write_LCD_Command(p|0x80);}void Display_LCD_String(uchar p,uchar *s){uchar i;Set_LCD_POS(p);for(i=0;i<16;i++){Write_LCD_Data(s[i]);DelayMS(1); }}void Format_DateTime(uchar d,uchar *a){a[0]=d/10+'0';a[1]=d%10+'0';}void main(){Init_LCD();while(1){GetTime();Format_DateTime(DateTime[6],LCD_DSY_BUFFER1+5);Format_DateTime(DateTime[4],LCD_DSY_BUFFER1+8);Format_DateTime(DateTime[3],LCD_DSY_BUFFER1+11);strcpy(LCD_DSY_BUFFER1+13,WEEK[DateTime[5]]);Format_DateTime(DateTime[2],LCD_DSY_BUFFER2+5);Format_DateTime(DateTime[1],LCD_DSY_BUFFER2+8);Format_DateTime(DateTime[0],LCD_DSY_BUFFER2+11);Display_LCD_String(0x00,LCD_DSY_BUFFER1);Display_LCD_String(0x40,LCD_DSY_BUFFER2);}}
