蓝桥杯（3）ds1302模块_蓝桥杯ds1302.h-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_45601654/article/details/117930273

该程序主要展示了如何使用STM32微控制器初始化并驱动DS1302实时时钟芯片，包括读取和设置时钟数据。通过中断服务函数实现定时显示，并处理按键输入来调整时间。代码中包含了DS1302的驱动函数以及相关延时和初始化函数。

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主函数

#include <stc15f2k60s2.h>
#include <ds1302.h>
#include <intrins.h>
#include <stdio.h>
#include <string.h>

#define uchar unsigned char
#define uint unsigned int
#define get() (P3&0x3f)|((P4&0x10)<<3)|((P4&0x04)<<4)

void allinit();
void Delay5ms()	;	//@12.000MHz
void mkey();
void Timer0Init();

uchar tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff};
uchar disbuf[8]={0,11,11,11,11,11,11,11};
uchar discom=0,key=0;
extern unsigned char clock[];

void main()
{
	Timer0Init();
	ET0=1;
	EA=1;
	allinit();
	DsInit();
	while(1)
	{
		dsread();
		disbuf[0]=clock[2]/10;disbuf[1]=clock[2]%10;disbuf[2]=10;
		disbuf[3]=clock[1]/10;disbuf[4]=clock[1]%10;disbuf[5]=10;
		disbuf[6]=clock[0]/10;disbuf[7]=clock[0]%10;
		mkey();
	}
	
}
void mkey()
{
	uchar temp;
	P3=0x0f;P44=0;P42=0;
	temp=get();
	P3=0xf0;P44=1;P42=1;
	temp|=get();//是或取位
	
	if((temp!=0xff)&&!key)
	{
			key=temp;
	}
	else if((temp==0xff)&&key)//注意是else选择，==为松手触发,!=为按下触发//累加的功能用松手触发好！
	{
			switch (key)
			{
				case 0x7e:disbuf[0]=1;break;
				case 0x7d:disbuf[0]=2;break;
				case 0x7b:disbuf[0]=3;break;
				case 0x77:disbuf[0]=4;break;
				
				case 0xbe:disbuf[0]=5;break;
				case 0xbd:disbuf[0]=6;break;
				case 0xbb:disbuf[0]=7;break;
				case 0xb7:disbuf[0]=8;break;
				
				case 0xde:disbuf[1]=0;break;
				case 0xdd:disbuf[2]=1;break;
				case 0xdb:disbuf[3]=1;break;
				case 0xd7:disbuf[4]=1;break;
				
				case 0xee:disbuf[5]=1;break;
				case 0xed:disbuf[6]=1;break;
				case 0xeb:disbuf[7]=1;break;
				case 0xe7:disbuf[0]=9;break;
			}
			key=0;
	}
}
void Timer0Init(void)		//1??@12.000MHz
{
	AUXR |= 0x80;		//?????1T??
	TMOD &= 0xF0;		//???????
	TL0 = 0x20;		//??????
	TH0 = 0xD1;		//??????
	TF0 = 0;		//??TF0??
	TR0 = 1;		//???0????
}

void time0() interrupt 1
{
	P2=0xc0;
	P0=1<<discom;
	P2=0xe0;
	P0=tab[disbuf[discom]];
	
	if(++discom==8)discom=0;
}

void allinit()
{
	P2=0x80;
	P0=0xff;
	
	P2=0xa0;
	P0=0x00;
	
	P2=0xc0;
	P0=0xff;
	P2=0xe0;
	P0=0xff;
}

void Delay5ms()		//@12.000MHz
{
	unsigned char i, j;

	i = 59;
	j = 90;
	do
	{
		while (--j);
	} while (--i);
}

时钟芯片驱动代码

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

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

unsigned char clock[7]={56,59,23,0,0,0,0};
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 )     
{
	unsigned char num;
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
 	RST=1; 	_nop_();  
 	Write_Ds1302(address);	
	num=(dat/10<<4)|(dat%10);
 	Write_Ds1302(num);		
 	RST=0; 
}

unsigned char Read_Ds1302_Byte ( unsigned char address )
{
 	unsigned char i,temp=0x00,low,high;
 	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_();
	
	low=temp%16;
	high=temp/16;
	temp=high*10+low;
	
	return (temp);			
}

void DsInit()
{
	unsigned char add=0x80,i=0;
	Write_Ds1302_Byte(0x8e,0x00);
	for(;i<7;i++)
	{
		Write_Ds1302_Byte(add,clock[i]);
		add=add+2;
	}
	Write_Ds1302_Byte(0x8e,0x80);
}

void dsread()
{
	unsigned char add=0x81,i=0;
	EA=0;
	Write_Ds1302_Byte(0x8e,0x00);
	for(;i<7;i++)
	{
		clock[i]=Read_Ds1302_Byte(add);
		add=add+2;
	}
	Write_Ds1302_Byte(0x8e,0x80);
	EA=1;
}