蓝桥杯单片机DS1302时钟

最新推荐文章于 2025-05-28 21:50:34 发布

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最新推荐文章于 2025-05-28 21:50:34 发布

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分类专栏：蓝桥杯备赛文章标签：单片机蓝桥杯

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该博客详细介绍了如何使用SPI接口与MCU配合，对DS1302实时时钟模块进行配置和读取操作。通过设置特定寄存器地址，可以设定和获取日期时间。提供的代码示例展示了初始化、配置和读取时间的函数，以及显示时间的函数，为嵌入式系统的时间管理提供了参考。

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采用SPI三线接口与MCU进行同步通信，并可采用突发方式一次传送多个字节的时钟参数和RAM数据。

日历时钟寄存器有8个存储单元：

所以，我们需要三个数组：

定义DS1302读操作的日历时钟存储器地址

r_add[] = {0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};

定义DS1302写操作的日历时钟存储器地址

w_add[7] = {0x80,0x82,0x84,0x86,0x88,0x8a,0x8c};

定义DS1302日历时钟的7个配置参数：

如22年2月6日21时56分30秒

nowTime[7]={0x30,0x34,0x21,0x06,0x02,0x07,0x22};

我们可以进行基本操作：设定时间参数，读取实时时间。

日历时钟参数配置函数：

void DS1302_Config()

{

char i;

Write_Ds1302(0x8e,0x00);

for(i=0;i<7;i++)

{

Write_Ds1302(w_add[i],nowTime[i]);

}

Write_Ds1302(0x8e,0x80);

}

日历时钟数据读取函数：

void Get_Time(void)

{

unsigned char i;

EA = 0;

for(i=0;i<7;i++){

nowTime[i] = Read_Ds1302(r_add[i]);

}

EA = 1;

}

下面是完整代码：

SMG.h

#ifndef __SMG_H
#define __SMG_H
#include "reg52.h"
void DelaySMG(unsigned char t);
void DisPlaySMG_Bit(unsigned char pos,unsigned char dat);
void DisPlay_All(unsigned char dat);
#endif

SMG.c:

#include "SMG.h"
void DelaySMG(unsigned char t)
{
	while(t--);
}
void DisPlaySMG_Bit(unsigned char pos,unsigned char dat)
{
	P0=0xff;
	P2=P2&0x1f|0xe0;
	P2=P2&0x1f;
	P0=0x01<<pos;
	P2=P2&0x1f|0xc0;
	P2=P2&0x1f;
	P0=dat;
	P2=P2&0x1f|0xe0;
	P2=P2&0x1f;
}
void DisPlay_All(unsigned char dat)
{
	P0=0xff;
	P2=P2&0x1f|0xc0;
	P2=P2&0x1f;
	P0=dat;
	P2=P2&0x1f|0xe0;
	P2=P2&0x1f;
}

ds1302.h:

#ifndef __DS1302_H
#define __DS1302_H
#define REG_SECOND 0x80
#define REG_MINUTES 0x82
#define REG_HOUR    0x84
#define REG_DATE    0x86
#define REG_MONTH   0x88
#define REG_WEEK    0x8A
#define REG_YEAR    0x8C
#define REG_PROTECT 0x8E
void Write_Ds1302_Byte(unsigned  char temp);
void Write_Ds1302( unsigned char address,unsigned char dat );
unsigned char Read_Ds1302 ( unsigned char address );


void DS1302_Init(void);
void Get_Time(void);

#endif

ds1302.c:

#include <intrins.h>
#include "ds1302.h"
#include "reg52.h"
sbit SCK = P1^7;		
sbit SDA = P2^3;		
sbit RST = P1^3;   // DS1302¸´Î»
extern unsigned char nowTime[7];//Ãë·ÖÊ±13:30:00
code unsigned char r_add[] = {0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};
/**
  * @brief  Send a byte to the DS1302.
  * @param  temp: value to write to DS1302.
  * @retval None
  */
void Write_Ds1302_Byte(unsigned  char temp) 
{
	unsigned char i;
	for (i=0;i<8;i++)     	
	{ 
		SCK=0;
		SDA=temp&0x01;
		temp>>=1; 
		SCK=1;
	}
}  
 
/**
  * @brief  Writes to the selected DS1302 register.
  * @param  address: address of the selected register.
  * @param  dat: value to write to the selected register.
  * @retval None
  */
void Write_Ds1302( unsigned char address,unsigned char dat )     
{
 	RST=0;
	_nop_();
 	SCK=0;
	_nop_();
 	RST=1;	
   	_nop_();  
 	Write_Ds1302_Byte(address);	
 	Write_Ds1302_Byte(dat);		
 	RST=0; 
}

/**
  * @brief  Reads the selected DS1302 Register.
  * @param  address: address of the selected register.
  * @retval DS1302 Register Value.
  */
unsigned char Read_Ds1302 ( unsigned char address )
{
 	unsigned char i,temp=0x00;
 	RST=0;
	_nop_();
 	SCK=0;
	_nop_();
 	RST=1;
	_nop_();
 	Write_Ds1302_Byte(address);
 	for (i=0;i<8;i++) 	
 	{		
		SCK=0;
		temp>>=1;	
 		if(SDA)
 		temp|=0x80;	
 		SCK=1;
	} 
 	RST=0;
	_nop_();
 	RST=0;
	SCK=0;
	_nop_();
	SCK=1;
	_nop_();
	SDA=0;
	_nop_();
	SDA=1;
	_nop_();
	return (temp);			
}
void DS1302_Init(void)
{
	Write_Ds1302(REG_PROTECT,0x00); 
	Write_Ds1302(REG_SECOND,0);
	Write_Ds1302(REG_MINUTES,0);
	Write_Ds1302(REG_HOUR,0);
	Write_Ds1302(REG_PROTECT,0x80);	
}
void Get_Time(void)
{
	unsigned char i;
	EA = 0;
	for(i=0;i<7;i++){
		nowTime[i] = Read_Ds1302(r_add[i]);
	}
	EA = 1;
}

main.c:

#include "ds1302.h"
#include "SMG.h"
#include "reg52.h"
code unsigned char w_add[7] = {0x80,0x82,0x84,0x86,0x88,0x8a,0x8c};
code unsigned char SMG_duanma[10]={0xc0,0xf9,0xa4,0xb0,
                               0x99,0x92,0x82,0xf8,
	                             0x80,0x90};
//2022.2.6   7  21.33.30 
unsigned char   nowTime[7]={0x30,0x34,0x21,0x06,0x02,0x07,0x22};
void DS1302_Config()
{
	char i;
	Write_Ds1302(0x8e,0x00);
	for(i=0;i<7;i++)
	{
		Write_Ds1302(w_add[i],nowTime[i]);
	}
	Write_Ds1302(0x8e,0x80);
	
}
void DisPlay_DS1302()
{
	//h
	DisPlaySMG_Bit(0,SMG_duanma[nowTime[2]/16]);
	DelaySMG(100);
	DisPlaySMG_Bit(1,SMG_duanma[nowTime[2]%16]);
	DelaySMG(100);
	DisPlaySMG_Bit(2,0xbf);
	DelaySMG(100);
	//min
	DisPlaySMG_Bit(3,SMG_duanma[nowTime[1]/16]);
	DelaySMG(100);
	DisPlaySMG_Bit(4,SMG_duanma[nowTime[1]%16]);
	DelaySMG(100);
	DisPlaySMG_Bit(5,0xbf);
	DelaySMG(100);
	//s
	DisPlaySMG_Bit(6,SMG_duanma[nowTime[0]/16]);
	DelaySMG(100);
	DisPlaySMG_Bit(7,SMG_duanma[nowTime[0]%16]);
	DelaySMG(100);
	DisPlay_All(0xff);
}
void main()
{
	DS1302_Init();
	DS1302_Config();
	P0=0;
	P2=P2&0x1f|0xa0;
	P2=P2&0x1f;
	while(1)
	{
		Get_Time();
		DisPlay_DS1302();
	}
}