基于51单片机的电子时钟

#include<reg51.h> #include<intrins.h> #include<stdio.h> #define uchar unsigned char #define uint unsigned int #define anod P2 #define seg7 P1 sbit CLK=P1^7; sbit IO=P1^6; sbit RST=P1^5; sbit ACC0=ACC^0; sbit ACC7=ACC^7; sbit tiaoshi=P3^7; sbit inck=P3^6; sbit DQ=P3^2; uint count; uchar temp,readdata; bit inck_flag=0x20; bit ReadTempFlag;//读时间的标志 typedef struct { uchar Second; uchar Minute; uchar Hour; uchar timestr[6]; } SYSTEMTIME; SYSTEMTIME currenttime; #define second 0x80 #define minute 0x82 #define hour 0x84 void mdelay(uint count) { uchar i,j; for(i=0;i<count;i++) {for(j=0;j<106;j++) ; } } void ds1302inputbyte(uchar d) { uchar i; ACC=d; for(i=8;i>0;i--) {IO=ACC0; CLK=1; CLK=0; ACC=ACC>>1; } } uchar ds1302utputbyte(void) { uchar i; ACC=0; for(i=8;i>0;i--) {ACC=ACC>>1; ACC7=IO; CLK=1; CLK=0; } return(ACC); } void write1302(uchar ucaddr,uchar ucda) { RST=0; CLK=0; RST=1; ds1302inputbyte(ucaddr); ds1302inputbyte(ucda); CLK=1; RST=0; } uchar read1302(uchar ucaddr) { uchar ucdata; RST=0; CLK=0; RST=1; ds1302inputbyte(ucaddr|0x01); ucdata=ds1302utputbyte(); CLK=1; RST=0; return(ucdata); } void ds1302_gettime(SYSTEMTIME*time) { uchar readvalue; readvalue=read1302(second); time->Second=((readvalue&0x70)>>4)*10+(readvalue&0x0f); readvalue=read1302(minute); time->Minute=((readvalue&0x70)>>4)*10+(readvalue&0x0f); readvalue=read1302(hour); time->Hour=((readvalue&0x70)>>4)*10+(readvalue&0x0f); } void timetostr(SYSTEMTIME*time) { time->timestr[0]=time->Hour/10; time->timestr[1]=time->Hour%10; time->timestr[2]=time->Minute/10; time->timestr[3]=time->Minute%10; time->timestr[4]=time->Second/10; time->timestr[5]=time->Second%10; } void dis(SYSTEMTIME*time) { uchar disbit,shitfb; ds1302_gettime(time); timetostr(time); disbit=1; switch(count) { case 0: for(shitfb=0;shitfb<6;shitfb++) { _nop_(); _nop_(); seg7=time->timestr[shitfb]; anod=_crol_(disbit,shitfb); mdelay(6); anod=0; } break; case 1: for(shitfb=0;shitfb<2;shitfb++) { _nop_(); _nop_(); seg7=time->timestr[shitfb]; anod=_crol_(disbit,shitfb); mdelay(6); anod=0; } break; case 2: for(shitfb=0;shitfb<4;shitfb++) { _nop_(); _nop_(); seg7=time->timestr[shitfb]; anod=_crol_(disbit,shitfb); mdelay(6); anod=0; } break; case 3: for(shitfb=0;shitfb<6;shitfb++) { _nop_(); _nop_(); seg7=time->timestr[shitfb]; anod=_crol_(disbit,shitfb); mdelay(6); anod=0; } break; default:break; } } void setkey() { if(tiaoshi==0) { mdelay(8); if(tiaoshi==0) { count=count+1; if(count==4) { count=0; readdata=(read1302(0x80))&0x7f; write1302(0x80,readdata); write1302(0x8e,0x80); } while(tiaoshi==0); } } } void inckey() { if(inck==0) { mdelay(8); switch(count) { case 1: temp=read1302(hour); temp=((temp&0x70)>>4)*10+(temp&0x0f); temp=temp+1; if(temp>=24) temp=0; inck_flag=1; break; case 2: temp=read1302(minute); temp=((temp&0x70)>>4)*10+(temp&0x0f); temp=temp+1; inck_flag=1; if(temp>=60) temp=0; break; case 3: temp=read1302(second); temp=((temp&0x70)>>4)*10+(temp&0x0f); temp=temp+1; inck_flag=1; if(temp>=60) temp=0; break; default: inck_flag=0;break; } while(inck==0); } } void keydone() { write1302(0x8e,0x00); readdata=read1302(0x80); write1302(0x80,readdata|0x80); switch(count) { case 1:do { inckey(); if(inck_flag==1) { temp=(temp/10)<<4|temp%10; write1302(0x84,temp); inck_flag=0; } dis(&currenttime); } while(count==2); break; case 2:do { inckey(); if(inck_flag==1) { temp=(temp/10)<<4|temp%10; write1302(0x82,temp); inck_flag=0; } dis(&currenttime); } while(count==3); break; case 3:do { inckey(); if(inck_flag==1) { temp=(temp/10)<<4|temp%10; write1302(0x80,temp); inck_flag=0; } dis(&currenttime); } while(count==4); break; default:break; } } void serial_init() { SCON =0X50; TMOD |=0X20; TH1=0XFD; TR1=1; TI=1; } void Init_Timer0(void) { TMOD |= 0x01; //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响 //TH0=0x00; //给定初值 //TL0=0x00; EA=1; //总中断打开 ET0=1; //定时器中断打开 TR0=1; //定时器开关打开 } /*------------------------------------------------ 定时器中断子程序 ------------------------------------------------*/ void Timer0_isr(void) interrupt 1 { static unsigned int num; TH0=(65536-2000)/256; //重新赋值 2ms TL0=(65536-2000)%256; num++; if(num==300) // { num=0; ReadTempFlag=1; //读标志位置1 } } void main() { int temp; float temperature; Init_Timer0(); serial_init(); inck_flag=0; mdelay(100); readdata=read1302(0x80); write1302(0x80,readdata&0x7f); while(1) { ds1302_gettime(&currenttime); timetostr(&currenttime); dis(&currenttime); setkey(); if(count!=0) keydone(); if(ReadTempFlag==1) { ReadTempFlag=0; temp=ReadTemperature(); temperature=(float)temp*0.0625; printf("%4.4fC\r",temperature);//打印温度值 } } }