蓝桥杯单片机数码管显示DS1302时钟

最新推荐文章于 2025-03-23 11:00:35 发布

原创最新推荐文章于 2025-03-23 11:00:35 发布 · 825 阅读

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#蓝桥杯 #单片机

文章详细介绍了如何在嵌入式系统中通过C语言操作DS1302实时时钟模块，实现时间的读取和设置，并通过SMG库在数码管上显示。展示了Write_Ds1302、Write_Ds1302_Byte、Read_Ds1302_Byte等函数的具体用法。

数码管显示DS1302的时钟我通通常采用的是一种指针传递参数的方式

下面放上代码

DS1302.c文件

#include "ds1302.h"  									

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

//向DS1302寄存器写入数据
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; 
}

//从DS1302寄存器读出数据
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);			
}
void DS1302_SetTime(unsigned char *Time)
{
	Write_Ds1302_Byte(0x8e,0x00);//关闭写保护
	Write_Ds1302_Byte(0x84,Time[0]/10*16 + Time[0]%10);//将十进制数转为BCD码
	Write_Ds1302_Byte(0x82,Time[1]/10*16 + Time[1]%10);
	Write_Ds1302_Byte(0x80,Time[2]/10*16 + Time[2]%10);
	Write_Ds1302_Byte(0x8e,0x80);//打开写保护
}
void DS1302_ReadTime(unsigned char *Time)
{//将时间格式从BCD码转化到十进制显示再传给指针
	Time[0] = Read_Ds1302_Byte(0x85)/16*10+Read_Ds1302_Byte(0x85)%16; 
	Time[1] = Read_Ds1302_Byte(0x83)/16*10+Read_Ds1302_Byte(0x83)%16; 
	Time[2] = Read_Ds1302_Byte(0x81)/16*10+Read_Ds1302_Byte(0x81)%16; 
}

DS1302.h源文件

#ifndef __DS1302_H
#define __DS1302_H
#include <STC15F2K60S2.H>

#include <intrins.h>

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

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


void DS1302_ReadTime(unsigned char *Time);
void DS1302_SetTime(unsigned char *Time);


#endif

Smg.c文件

#include <smg.h>

unsigned char smg_duan[] = {0xC0,0xF9,0xA4,0xB0,0x99,
0x92,0x82,0xF8,0x80,0x90,
0x00,0xBF};
unsigned char smg_wei[] = {0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

unsigned int i;
void smg_show(unsigned char pos,num/*,point*/)
{
	P0 = 0xff;//清空P0
	P2 = P2&0x1f | 0xe0;//1111 1111 Y7选择数码管显示
	P2 &= 0x1f;  //关闭锁存器
	
	P0 = smg_wei[pos-1];//数码管的位选值
	P2 = P2&0x1f | 0xc0;//1101 1111 Y6选择数码管位选
	P2 &= 0x1f;  //关闭锁存器
	
	P0 = smg_duan[num]; //数码管段选
	//if(point) P0 |= 0x7f;如果存在小数点则加上小数点
	P2 = P2&0x1f | 0xe0; //1111 1111  Y7选择数码管显示
	P2 &= 0x1f;  //关闭锁存器
	i = 200;while(i--);//根据数码管实际显示情况加一段延时
}

Smg.h文件

#include <STC15F2K60S2.H>

void smg_show(unsigned char pos,num);

main.c源文件

#include <STC15F2K60S2.H>
#include <ds1302.h>
#include <smg.h>

unsigned char Time[] = {23,59,59};
void main()
{
	DS1302_SetTime(Time);
	while(1)
	{
		
		DS1302_ReadTime(Time);
		smg_show(1,Time[0]/10);
		smg_show(2,Time[0]%10);
		smg_show(4,Time[1]/10);
		smg_show(5,Time[1]%10);
		smg_show(7,Time[2]/10);
		smg_show(8,Time[2]%10);
		smg_show(3,11);
		smg_show(6,11);
		
	}
}