蓝桥杯电子类单片机组模块——DS1302

在蓝桥杯电子类单片机组历年的省赛以及国赛中，DS1302模块常常被考察到。而组委会为减轻考生负担，提前给出了关于DS1302模块的代码，剩下的便需要我们自己去编写（以第十届为例）。

现在，我们来介绍以下DS1302模块剩余代码的编写以及模块的运用方法。

1、补全模块C文件

#include <reg52.h>
#include <intrins.h>

sbit SCK=P1^7;		
sbit SDA=P2^3;		
sbit RST = P1^3;   

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);			
}

//************************下面的代码需要自己写***********************//
void set_sfm(unsigned char shi,unsigned char fen,unsigned char miao)
{
		Write_Ds1302_Byte(0x8e,0);
		Write_Ds1302_Byte(0x80,miao/10*16+miao%10);
		Write_Ds1302_Byte(0x82,fen/10*16+fen%10);
		Write_Ds1302_Byte(0x84,shi/10*16+shi%10);
		Write_Ds1302_Byte(0x8e,0x80);
	
}
//************************上面的代码需要自己写***********************//

2、补全模块H文件

#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 );
//************************下面的代码需要自己写***********************//
void set_sfm(unsigned char shi,unsigned char fen,unsigned char miao);
//************************上面的代码需要自己写***********************//
#endif

3、在主函数中运用DS1302模块

#include "STC15F2K60S2.H"
#include "ds1302.h"

#define u8 unsigned char 

/*************  ??????    **************/
u8 code t_display[]={                       //????
//   0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
    0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
//black  -     H    J    K    L    N    o   P    U     t    G    Q    r   M    y
    0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
    0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46};    //0. 1. 2. 3. 4. 5. 6. 7. 8. 9. -1

u8 code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};      //??

void Timer0Init(void)		//[email protected]
{
	AUXR |= 0x80;		//?????1T??
	TMOD &= 0xF0;		//???????
	TL0 = 0xCD;		//??????
	TH0 = 0xD4;		//??????
	TF0 = 0;		//??TF0??
	TR0 = 1;		//???0????
	ET0 = 1;
	EA  = 1;
}

u8 miao,fen,shi;
u8 smg_time[8];
void main()
{
		P0=~0x00;P2=0X80;P2=0X00;
		P2=0XA0;P0=0X00;P2=0X00;
		set_sfm(23,59,55);
		Timer0Init();
		while(1)
		{
			EA=0;
			miao=Read_Ds1302_Byte(0x81);
			fen=Read_Ds1302_Byte(0x83);
			shi=Read_Ds1302_Byte(0x85);
			//读取的shi、fen、miao全部为十六进制代码
			EA=1;
			
			smg_time[0]=t_display[shi/16];
			smg_time[1]=t_display[shi%16];
			smg_time[2]=t_display[17];
			smg_time[3]=t_display[fen/16];
			smg_time[4]=t_display[fen%16];
			smg_time[5]=t_display[17];
			smg_time[6]=t_display[miao/16];
			smg_time[7]=t_display[miao%16];
			//将读取的shi、fen、miao转化为十进制代码
			

		}
}

void Timer0()	interrupt 1//[email protected]
{
		static int smg_count=0,i=0;
		smg_count++;
	
		if(smg_count==2)
		{
			smg_count=0;
			P2=0XC0;P0=0;P2=0;
			P2=0XE0;P0=~smg_time[i];P2=0;
			P2=0XC0;P0=T_COM[i];P2=0;
			i++; 
			if(i==8){i=0;}

		}

}

4、另外，在运用DS1302模块的时候还涉及到了数码管模块。大家可以参照下面的blog链接：https://blog.csdn.net/qq_44629819/article/details/104490649

祝大家在蓝桥杯比赛中获得优异的成绩！
——南昌大学 电子183刘昊