蓝桥杯单片机第八届省赛，电子钟（ds1302）

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这个是用ds1302写的，还有一个是用中断写得，如果有需要，主页见！

题目：

思路：

通过Ds1302来实现时间的控制，onewrie.c来读取温度，并且显示出来。按键的功能和判断已经很常规了，要注意的就是在延时的时候，数码管显示的函数依旧要工作。

源代码：

main.c

#include"reg52.h"
#include"intrins.h"
#include"ds1302.h"
#include"onewire.h"
void smg_Display();
int i=0;
char code xianshi[13]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff,0xbf,0xc6};
unsigned int temper=0;
int nao_time=0,count=0;
int nao_h=0,nao_m=0,nao_s=0;
sbit S4=P3^3;
sbit S5=P3^2;
sbit S6=P3^1;
sbit S7=P3^0;
sbit L1=P0^7;
int K4=0,K5=0,K6=0,K7=0;
unsigned int code Write_ADDR[7]={0x80,0x82,0x84,0x86,0x88,0x8a,0x8c};
unsigned int code Read_ADDR[7]={0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};
unsigned int Time[3]={0x55,0x59,0x23};
void Put_in_time()
{
	int i=0;
	Write_Ds1302_Byte(0x8e,0x00);
	for(i=0;i<3;i++)
	{
		Write_Ds1302_Byte(Write_ADDR[i],Time[i]);
	}
	Write_Ds1302_Byte(0x8e,0x80);
}
void Get_out_time()
{
	int i;
	for(i=0;i<3;i++)
	{
		Time[i]=Read_Ds1302_Byte(Read_ADDR[i]);
	}
}
void choose138(int n)
{
	switch(n)
	{
		case(0):P2=(P2&0x1f)|0x00;break;
		case(4):P2=(P2&0x1f)|0x80;break;
		case(5):P2=(P2&0x1f)|0xa0;break;
		case(6):P2=(P2&0x1f)|0xc0;break;
		case(7):P2=(P2&0x1f)|0xe0;break;
	}
}
void clean()
{
	choose138(4);
	P0=0xff;
	choose138(5);
	P0=0x00;
}
//-----------------------------------------------------nao_zhang
void Delay200ms()		//@11.0592MHz
{
unsigned char i, j;

	_nop_();
	_nop_();
	i = 76;
	j = 74;
	do
	{  smg_Display();
		while (--j);
	} while (--i);
}



void nao_zhong()
{
	if(nao_s==((Time[0]/16)*10+(Time[0]%16))&&nao_m==((Time[1]/16)*10+(Time[1]%16))&&nao_h==((Time[2]/16)*10+(Time[2]%16)))
	{ 
		for(nao_time=0;nao_time<13;nao_time++)
		{
			if(S4==0||S5==0||S6==0||S7==0)
			{break;}
			else
			{
				Get_out_time();
				smg_Display();
			 	P0=0xff;
				choose138(4);
				L1=~L1;
				Delay200ms();
				choose138(4);
				P0=0xff;
				Delay200ms();
			}	
		}
		choose138(4);
		P0=0xff;		
	}
}
//-----------------------------------------------------
//-----------------------------------------------------	 wei_du
void Get_temper()
{
	char HBS,LBS;
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0x44);
	Delay_OneWire(200);
	init_ds18b20();
	Write_DS18B20(0xcc);
	Write_DS18B20(0xbe);
	LBS=Read_DS18B20();
	HBS=Read_DS18B20();
	temper=HBS<<4;
	temper=temper|(LBS>>4);
}

//-----------------------------------------------------
//-----------------------------------------------------	an_jian
void Delay5ms()		//@11.0592MHz
{
	unsigned char i, j;

	i = 54;
	j = 199;
	do
	{
		while (--j);
	} while (--i);
}

void key_panduan_time()
{
	if(S7==0&&K6==0)
	{
		Delay5ms();
		if(S7==0)
		{
			K7++;
			if(K7==4)
			K7=0;
		}
		while(!S7);
	}
	if(K7==1&&S5==0)
	{
		int temp;
		Delay5ms();
		if(S5==0)
		{
			Get_out_time();
			temp=Time[2]%16+(Time[2]/16)*10;
			temp++;
			if(temp==25)
			temp=0;
			Time[2]=(temp+(temp/10)*6);
			Put_in_time();			
		}
		while(!S5);
	}
	if(K7==2&&S5==0)
	{
		int temp;
		Delay5ms();
		if(S5==0)
		{
			Get_out_time();
			temp=Time[1]%16+(Time[1]/16)*10;
			temp++;
			if(temp==60)temp=0;
			Time[1]=(temp+(temp/10)*6);
			Put_in_time();			
		}
		while(!S5);
	}
	if(K7==3&&S5==0)
	{
		int temp;
		Delay5ms();
		if(S5==0)
		{
			Get_out_time();
			temp=Time[0]%16+(Time[0]/16)*10;
			temp++;
			if(temp==60)temp=0;
			Time[0]=(temp+(temp/10)*6);
			Put_in_time();			
		}
		while(!S5);
	}
	if(K7==1&&S4==0)
	{
		int temp;
		Delay5ms();
		if(S4==0)
		{
			Get_out_time();
			temp=Time[2]%16+(Time[2]/16)*10;
			temp--;
			if(temp==-1)
			temp=23;
			Time[2]=(temp+(temp/10)*6);
			Put_in_time();			
		}
		while(!S4);
	}
	if(K7==2&&S4==0)
	{
		int temp;
		Delay5ms();
		if(S4==0)
		{
			Get_out_time();
			temp=Time[1]%16+(Time[1]/16)*10;
			temp--;
			if(temp==-1)temp=59;
			Time[1]=(temp+(temp/10)*6);
			Put_in_time();			
		}
		while(!S4);
	}
	if(K7==3&&S4==0)
	{
		int temp;
		Delay5ms();
		if(S4==0)
		{
			Get_out_time();
			temp=Time[0]%16+(Time[0]/16)*10;
			temp--;
			if(temp==-1)temp=59;
			Time[0]=(temp+(temp/10)*6);
			Put_in_time();			
		}
		while(!S4);
	}


	if(S6==0&&K7==0)
	{
		Delay5ms();
		if(S6==0)
		{
			K6++;
			if(K6==4)
			K6=0;
		}
		while(!S6);
	}
	if(K6==1&&S5==0)
	{
		Delay5ms();
		if(S5==0)
		{
			nao_h++;
			if(nao_h==24)nao_h=0;
		}
		while(!S5);
	}
	if(K6==2&&S5==0)
	{
		Delay5ms();
		if(S5==0)
		{
			nao_m++;
			if(nao_m==60)nao_m=0;
		}
		while(!S5);
	}
	if(K6==3&&S5==0)
	{
		Delay5ms();
		if(S5==0)
		{
			nao_s++;
			if(nao_s==60)nao_s=0;
		}
		while(!S5);
	}
	if(K6==1&&S4==0)
	{
		Delay5ms();
		if(S4==0)
		{
			nao_h--;
			if(nao_h==-1)nao_h=23;
		}
		while(!S4);
	}
	if(K6==2&&S4==0)
	{
		Delay5ms();
		if(S4==0)
		{
			nao_m--;
			if(nao_m==-1)nao_m=59;
		}
		while(!S4);
	}
	if(K6==3&&S4==0)
	{
		Delay5ms();
		if(S4==0)
		{
			nao_s--;
			if(nao_s==-1)nao_s=59;
		}
		while(!S4);
	}
}
//-----------------------------------------------------

//-----------------------------------------------------SMG xian_shi
void Delay300us()		//@11.0592MHz
{
	unsigned char i, j;

	_nop_();
	_nop_();
	i = 4;
	j = 54;
	do
	{
		while (--j);
	} while (--i);
}

void SMG_display(int wei,int dat)
{
	choose138(6);
	P0=0x80>>(wei-1);
	choose138(7);
	P0=xianshi[dat];
}
void smg_Display()
{
	if(K6==0&&K7==0&&S4==0)
	{
		Delay5ms();
		while(S4==0)
		{
			SMG_display(1,12);
			Delay300us();
			SMG_display(2,temper%10);
			Delay300us();
			SMG_display(3,temper/10);
			Delay300us();
			SMG_display(4,10);
			Delay300us();
			SMG_display(5,10);
			Delay300us();
			SMG_display(6,10);
			Delay300us();
			SMG_display(7,10);
			Delay300us();
			SMG_display(8,10);
			Delay300us();
		}
	}	
	if(K6==0&&K7==0)
	{
		SMG_display(1,Time[0]%16);
		Delay300us();
		SMG_display(2,Time[0]/16);
		Delay300us();
		SMG_display(3,11);
		Delay300us();
		SMG_display(4,Time[1]%16);
		Delay300us();
		SMG_display(5,Time[1]/16);
		Delay300us();
		SMG_display(6,11);
		Delay300us();
		SMG_display(7,Time[2]%16);
		Delay300us();
		SMG_display(8,Time[2]/16);
		Delay300us();
	}
	if(K6==0&&K7==1)
	{
		i++;
		SMG_display(1,Time[0]%16);
		Delay300us();
		SMG_display(2,Time[0]/16);
		Delay300us();
		SMG_display(3,11);
		Delay300us();
		SMG_display(4,Time[1]%16);
		Delay300us();
		SMG_display(5,Time[1]/16);
		Delay300us();
		SMG_display(6,11);
		Delay300us();
		if(i<=70)
		{
			SMG_display(7,10);
			Delay300us();
			SMG_display(8,10);
			Delay300us();
		}
		else if(i>70&&i<140)
		{
			SMG_display(7,Time[2]%16);
			Delay300us();
			SMG_display(8,Time[2]/16);
			Delay300us();
		}
		else if(i>140)i=0;
	}
	if(K6==0&&K7==2)
	{
		i++;
		SMG_display(1,Time[0]%16);
		Delay300us();
		SMG_display(2,Time[0]/16);
		Delay300us();
		SMG_display(3,11);
		Delay300us();
		SMG_display(7,Time[2]%16);
		Delay300us();
		SMG_display(8,Time[2]/16);
		Delay300us();
		SMG_display(6,11);
		Delay300us();
		if(i<=70)
		{
			SMG_display(4,10);
			Delay300us();
			SMG_display(5,10);
			Delay300us();
		}
		else if(i>70&&i<140)
		{
			SMG_display(4,Time[1]%16);
			Delay300us();
			SMG_display(5,Time[1]/16);
			Delay300us();
		}
		else if(i>140)i=0;
	}
	if(K6==0&&K7==3)
	{
		i++;
		SMG_display(7,Time[2]%16);
		Delay300us();
		SMG_display(8,Time[2]/16);
		Delay300us();
		SMG_display(3,11);
		Delay300us();
		SMG_display(4,Time[1]%16);
		Delay300us();
		SMG_display(5,Time[1]/16);
		Delay300us();
		SMG_display(6,11);
		Delay300us();
		if(i<=70)
		{
			SMG_display(1,10);
			Delay300us();
			SMG_display(2,10);
			Delay300us();
		}
		else if(i>70&&i<140)
		{
			SMG_display(1,Time[0]%16);
			Delay300us();
			SMG_display(2,Time[0]/16);
			Delay300us();
		}
		else if(i>140)i=0;
	}




	if(K7==0&&K6==1)
	{
		i++;
	 	SMG_display(1,nao_s%10);
		Delay300us();
		SMG_display(2,nao_s/10);
		Delay300us();
		SMG_display(3,11);
		Delay300us();
		SMG_display(4,nao_m%10);
		Delay300us();
		SMG_display(5,nao_m/10);
		Delay300us();
		SMG_display(6,11);
		Delay300us();
		if(i<70)
		{
			SMG_display(7,10);
			Delay300us();
			SMG_display(8,10);
			Delay300us();
		}
		else if(i>70&&i<140)
		{
			SMG_display(7,nao_h%10);
			Delay300us();
			SMG_display(8,nao_h/10);
			Delay300us();
		}
		else if(i>140)i=0;
	}
	if(K7==0&&K6==2)
	{
		i++;
	 	SMG_display(1,nao_s%10);
		Delay300us();
		SMG_display(2,nao_s/10);
		Delay300us();
		SMG_display(3,11);
		Delay300us();
		SMG_display(7,nao_h%10);
		Delay300us();
		SMG_display(8,nao_h/10);
		Delay300us();
		SMG_display(6,11);
		Delay300us();
		if(i<70)
		{
			SMG_display(4,10);
			Delay300us();
			SMG_display(5,10);
			Delay300us();
		}
		else if(i>70&&i<140)
		{
			SMG_display(4,nao_m%10);
			Delay300us();
			SMG_display(5,nao_m/10);
			Delay300us();
		}
		else if(i>140)i=0;
	}
	if(K7==0&&K6==3)
	{
		i++;
	 	SMG_display(7,nao_h%10);
		Delay300us();
		SMG_display(8,nao_h/10);
		Delay300us();
		SMG_display(3,11);
		Delay300us();
		SMG_display(4,nao_m%10);
		Delay300us();
		SMG_display(5,nao_m/10);
		Delay300us();
		SMG_display(6,11);
		Delay300us();
		if(i<70)
		{
			SMG_display(1,10);
			Delay300us();
			SMG_display(2,10);
			Delay300us();
		}
		else if(i>70&&i<140)
		{
			SMG_display(1,nao_s%10);
			Delay300us();
			SMG_display(2,nao_s/10);
			Delay300us();
		}
		else if(i>140)i=0;
	}
	
}
//-----------------------------------------------------

void main()
{
	clean();
	Put_in_time();
	while(1)
	{
		Get_out_time();
		key_panduan_time();
		nao_zhong();
		Get_temper();
		smg_Display();
	}
}

ds1302.c


#include 
#include 

sbit SCK=P1^7;		
sbit SDA=P2^3;		
sbit RST = P1^3;   // DS1302复位												

void Write_Ds1302(unsigned  char temp) 
{
	unsigned char i;
	for (i=0;i<8;i++)     	
	{ 
		SCK=0;
		SDA=temp&0x01;
		temp>>=1; 
		SCK=1;
	}
}   

void Write_Ds1302_Byte( unsigned char address,unsigned char dat )     
{
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
 	RST=1; 	_nop_();  
 	Write_Ds1302(address);	
 	Write_Ds1302(dat);		
 	RST=0; 
}

unsigned char Read_Ds1302_Byte ( unsigned char address )
{
 	unsigned char i,temp=0x00;
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
 	RST=1;	_nop_();
 	Write_Ds1302(address);
 	for (i=0;i<8;i++) 	
 	{		
		SCK=0;
		temp>>=1;	
 		if(SDA)
 		temp|=0x80;	
 		SCK=1;
	} 
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
	SCK=1;	_nop_();
	SDA=0;	_nop_();
	SDA=1;	_nop_();
	return (temp);			
}

ds1302.h

#ifndef __DS1302_H
#define __DS1302_H

void Write_Ds1302(unsigned char temp);
void Write_Ds1302_Byte( unsigned char address,unsigned char dat );
unsigned char Read_Ds1302_Byte( unsigned char address );
#endif

onewire.c

#include "reg52.h"

sbit DQ = P1^4;  //单总线接口

//单总线延时函数
void Delay_OneWire(unsigned int t)  //STC89C52RC
{
	t=t*12;
	while(t--);
}

//通过单总线向DS18B20写一个字节
void Write_DS18B20(unsigned char dat)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{
		DQ = 0;
		DQ = dat&0x01;
		Delay_OneWire(5);
		DQ = 1;
		dat >>= 1;
	}
	Delay_OneWire(5);
}

//从DS18B20读取一个字节
unsigned char Read_DS18B20(void)
{
	unsigned char i;
	unsigned char dat;
  
	for(i=0;i<8;i++)
	{
		DQ = 0;
		dat >>= 1;
		DQ = 1;
		if(DQ)
		{
			dat |= 0x80;
		}	    
		Delay_OneWire(5);
	}
	return dat;
}

//DS18B20设备初始化
bit init_ds18b20(void)
{
  	bit initflag = 0;
  	
  	DQ = 1;
  	Delay_OneWire(12);
  	DQ = 0;
  	Delay_OneWire(80);
  	DQ = 1;
  	Delay_OneWire(10); 
    initflag = DQ;     
  	Delay_OneWire(5);
  
  	return initflag;
}

onewire.h

#ifndef __ONEWIRE_H
#define __ONEWIRE_H

unsigned char rd_temperature(void);  //; ;
void Write_DS18B20(unsigned char dat);
unsigned char Read_DS18B20(void);
bit init_ds18b20(void);
void Delay_OneWire(unsigned int t);
#endif

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蓝桥杯单片机第八届省赛，电子钟（ds1302）

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