PIC16F877驱动DS1302芯片

只看该作者 · 2019-6-12 14:36

原文：https://blog.csdn.net/xingyu19871124/article/details/4462707

这个程序改网上的程序只用了一上午的时间，看来是用修改别人程序比自个从头开始编快的的多呀！

下面是原理图

只看该作者 · 2019-6-12 14:37

下面是程序头文件

#ifndef DS1302_H
#define DS1302_H

#include "main.h"

#define Time_24_Hour 0x00 //24时制控制
#define Time_Start  0x00 //开始走时
#define Time_Stop  0x80 //停止走时

#define DS1302_SECOND 0x80 //DS1302各寄存器操作命令定义
#define DS1302_MINUTE 0x82
#define DS1302_HOUR  0x84
#define DS1302_WEEK  0x8A
#define DS1302_DAY  0x86
#define DS1302_MONTH 0x88
#define DS1302_YEAR  0x8C
#define DS1302_WRITE 0x8E
#define DS1302_POWER 0x90

#define BCD2DEC(X) (((X&0x70)>>4)*10 + (X&0x0F)) //用于将BCD码转成十进制的宏
#define DEC2BCD(X) ((X/10)<<4 | (X%10)) //用于将十进制转成BCD

只看该作者 · 2019-6-12 14:37

#define RST RC0
#define DATA RC1
#define DS_CLK RC2
#define RST_DIR TRISC0
#define DATA_DIR TRISC1
#define SCLK_DIR TRISC2

typedef struct __SYSTEMTIME__ //定义的时间类型结构体,全部数为十进制
{
unsigned char Second;
unsigned char Minute;
unsigned char Hour;
unsigned char Week;
unsigned char Day;
unsigned char Month;
unsigned char Year;
unsigned char DateString[11];
unsigned char TimeString[9];
}systemetime;

只看该作者 · 2019-6-12 14:37

void init_ds1302() ;
void writebyte(uchar data) ;
uchar readbyte() ;
void ds_writedata(uchar add,uchar data) ;
uchar ds_readdata(uchar add) ;
void get_time(systemetime *Time) ;
void set_time(systemetime *Time) ;
void data2str(systemetime *Time) ;
void time2str(systemetime *Time) ;
#endif

只看该作者 · 2019-6-12 14:38

子程序

#include "ds1302.h"
void init_ds1302()
{
RST_DIR=0 ;
DATA_DIR=0 ;
SCLK_DIR=0 ;

ds_writedata(DS1302_WRITE,0x00);  //关闭写保护
ds_writedata(DS1302_SECOND,Time_Stop);//停止计时
ds_writedata(DS1302_HOUR,Time_24_Hour);//24时制
// ds_writedata(DS1302_POWER,0xA6);  //单二极管,4K电阻充电
ds_writedata(DS1302_WRITE,0x80);  //打开写保护
}

只看该作者 · 2019-6-12 14:38

void writebyte(uchar data)
{
uchar i;
DATA_DIR=0 ;
for(i=0;i<8;i++)
{
  if(data&0x01)
DATA=1 ;
  else
DATA=0 ;
  DS_CLK=1 ;
  DS_CLK=0 ;
  data=data>>1 ;
}
}

只看该作者 · 2019-6-12 14:38

uchar readbyte()
{
uchar i,temp ;
DATA_DIR=1 ;
for(i=0 ;i<8;i++)
{
  temp=temp>>1 ;
  if(DATA)
temp=temp|0x80 ;
  DS_CLK=1 ;
  DS_CLK=0 ;
}
DATA_DIR=0 ;
return temp ;
}

只看该作者 · 2019-6-12 15:34

void ds_writedata(uchar add,uchar data)
{
RST=0 ;
DS_CLK=0 ;
RST=1 ;
writebyte(add) ;
writebyte(data) ;
DS_CLK=1 ;
RST=0 ;

}

只看该作者 · 2019-6-12 15:34

uchar ds_readdata(uchar add)
{
uchar temp ;
RST=0 ;
DS_CLK=0 ;
RST=1 ;
writebyte(add|0x01) ;
temp=readbyte() ;
DS_CLK=1 ;
RST=0 ;
}

只看该作者 · 2019-6-12 15:35

void get_time(systemetime *Time)
{
unsigned char ReadValue;
ReadValue = ds_readdata(DS1302_SECOND);
Time->Second = BCD2DEC(ReadValue&0x7F);
ReadValue = ds_readdata(DS1302_MINUTE);
Time->Minute = BCD2DEC(ReadValue);
ReadValue = ds_readdata(DS1302_HOUR);
Time->Hour = BCD2DEC(ReadValue&0x7F);
ReadValue = ds_readdata(DS1302_DAY);
Time->Day = BCD2DEC(ReadValue);
ReadValue = ds_readdata(DS1302_WEEK);
Time->Week = BCD2DEC(ReadValue);
ReadValue = ds_readdata(DS1302_MONTH);
Time->Month = BCD2DEC(ReadValue);
ReadValue = ds_readdata(DS1302_YEAR);
Time->Year = BCD2DEC(ReadValue);
}

只看该作者 · 2019-6-12 15:35

void set_time(systemetime *Time)
{
uchar temp ;
ds_writedata(DS1302_WRITE,0x00); //关闭写保护
temp=DEC2BCD(Time->Year) ;
ds_writedata(DS1302_YEAR,temp);
temp=DEC2BCD(Time->Month) ;
ds_writedata(DS1302_MONTH,temp);
temp=DEC2BCD(Time->Week) ;
ds_writedata(DS1302_WEEK,temp);
temp=DEC2BCD(Time->Day) ;
ds_writedata(DS1302_DAY,temp);
temp=DEC2BCD(Time->Hour)|Time_24_Hour ;
ds_writedata(DS1302_HOUR,temp);
temp=DEC2BCD(Time->Minute) ;
ds_writedata(DS1302_MINUTE,temp);
temp=DEC2BCD(Time->Second)|Time_Start ;
ds_writedata(DS1302_SECOND,temp);

ds_writedata(DS1302_WRITE,0x80); //打开写保护
}

只看该作者 · 2019-6-12 15:35

void data2str(systemetime *Time)
{
//Year
Time->DateString[0] = '2';
Time->DateString[1] = '0';
Time->DateString[2] = Time->Year/10 + '0';
Time->DateString[3] = Time->Year%10 + '0';

Time->DateString[4] = '/';
//Month
Time->DateString[5] = Time->Month/10 + '0';
Time->DateString[6] = Time->Month%10 + '0';
Time->DateString[7] = '/';
//Day
Time->DateString[8] = Time->Day/10 + '0';
Time->DateString[9] = Time->Day%10 + '0';
Time->DateString[10] = '/0'; //字符串末尾加 '/0' ,判断结束字符
}

只看该作者 · 2019-6-12 15:36

void time2str(systemetime *Time)
{
//Hout
Time->TimeString[0] = Time->Hour/10 + '0';
Time->TimeString[1] = Time->Hour%10 + '0';

Time->TimeString[2] = ':';
//Minute
Time->TimeString[3] = Time->Minute/10 + '0';
Time->TimeString[4] = Time->Minute%10 + '0';

Time->TimeString[5] = ':';
//Second
Time->TimeString[6] = Time->Second/10 + '0';
Time->TimeString[7] = Time->Second%10 + '0';
//
Time->DateString[8] = '/0';
}

只看该作者 · 2019-6-12 15:36

下面是测试程序

#include "main.h"
#include "ds1302.h"
void init_all()
{
init_ds1302() ;
}
void interrupt main_int()
{
;
}

只看该作者 · 2019-6-12 15:36

systemetime tm ;
void main()
{
init_all() ;
tm.Day=19;
tm.Hour=13 ;
tm.Minute=4 ;
tm.Month=8 ;
tm.Year=9 ;
tm.Week=1 ;
set_time(&tm) ;
while(1)
{
  get_time(&tm) ;
  time2str(&tm) ;
  data2str(&tm) ;
}
}

只看该作者 · 2019-6-13 10:05

加入些介绍就更棒了

只看该作者 · 2019-6-14 15:16

为什么要分这么多楼发? 都发在一楼会丢吗

只看该作者 · 2019-6-15 13:34

只看该作者 · 2019-8-15 14:54