SaltyFish's Bowl

用定时器写完时钟后，开发板上的DS1302自然是不能放过，看了半天文档，差不多写出来了，特此记录一下下吧

前言

一个利用DS1302模块所写的一个简单的时钟，使用的是普中的开发板

只能够实现基本的计时功能

代码

main.c 主程序
ds1302.c 驱动ds1302模块
led_1602.c 驱动1602液晶

main.c

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#include "led_1602.h"
#include "ds1302.h"
#include <at89x52.h>

uint i=0;


void display_time_week(uint cl_week,uint w_local);
void display_time_date(uint *timep);

void delay (uint xms);

uchar dis_wel[]="Welcome!";
uchar dis_blog[]="www.erf172.tk";
uchar dis_week[]="SunMonTueWedThuFriSat";

extern uint *TIME_P;

uint time[7]={0x00,0x51,0x17,0x11,0x09,3,0x19};

void main()
{
    TIME_P=time;

    _1602_init();
    _1602_command(0x80);

    while(dis_blog[i]!='\0')
    {
        _1602_data(dis_blog[i]);
        i++;
    }

    _1602_command(0xc0);
    i=0;

    while(dis_wel[i]!='\0')
    {
        _1602_data(dis_wel[i]);
        i++;
    }

    delay(5000);

    Ds1302Init();

    _1602_command(1);



    while (1){
    
        Ds1302ReadTime();
        
        display_time_date(TIME_P);



        
    }

}   

void display_time_date(uint *timep)
{
    

    uint i=0;
    uchar time_display_date[10]={'2','0',0,0,'/',0,0,'/',0,0};
    uchar time_display_clock[8]={0,0,':',0,0,':',0,0};
    uchar time_display_week=0;

    time_display_date[2]=*(timep+6)/16+'0';
    time_display_date[3]=*(timep+6)%16+'0';
    
    time_display_date[5]=*(timep+4)/16+'0';
    time_display_date[6]=*(timep+4)%16+'0';

    time_display_date[8]=*(timep+3)/16+'0';
    time_display_date[9]=*(timep+3)%16+'0';

    time_display_clock[0]=*(timep+2)/16+'0';
    time_display_clock[1]=*(timep+2)%16+'0';

    time_display_clock[3]=*(timep+1)/16+'0';
    time_display_clock[4]=*(timep+1)%16+'0';
    
    time_display_clock[6]=*(timep+0)/16+'0';
    time_display_clock[7]=*(timep+0)%16+'0';

    time_display_week=*(timep+5)%7;
    
    _1602_command(0x83);

    for ( i = 0; i < 10; i++)
    {
        _1602_data(time_display_date[i]);
    }
    
    _1602_command(0xc6);

    for ( i = 0; i < 8; i++)
    {
        _1602_data(time_display_clock[i]);
    }

    _1602_command(0xc2);
    _1602_data(time_display_week);

    display_time_week(time_display_week,0xc2);
}

void display_time_week(uint cl_week,uint w_local)
{

    _1602_command(w_local);
    uint j=0;
    j=cl_week*3;
    while(j<=cl_week*3+2)
    {
        _1602_data(dis_week[j]);
        j++;
    }
    
}

void delay(uint xms)
{
    unsigned int x,y;
    for(x=xms;x>0;x--)
        for(y=110;y>0;y--);
}

ds1302.h

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#ifndef __DS1302_H_
#define __DS1302_H_


#include <at89x52.h>


#ifndef uchar
#define uchar unsigned char
#endif

#ifndef uint 
#define uint unsigned int
#endif


/* 定义一下nop，延时一个机器周期 */
#define __nop() __asm__ ("NOP")

__sbit  __at 0xB4 _DSIO;
__sbit  __at 0xB5 _RST;
__sbit  __at 0xB6 _SCLK;


void Ds1302Write(uchar ds1302_addr_w, uchar ds1302_data);
uchar Ds1302Read(uchar ds1302_addr_r);
void Ds1302Init();
void Ds1302ReadTime();



extern uchar clock_address_w[7];
extern uchar clock_address_r[7];

#endif

ds1302.c

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#include "ds1302.h"


uint *TIME_P;


uchar clock_address_w[7]={0x80,0x82,0x84,0x86,0x88,0x8a,0x8c};
uchar clock_address_r[7]={0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};

uchar *clock_address_p;


void Ds1302Write(uchar ds1302_addr_w, uchar ds1302_data)
{
   uint i=0;

   _RST=0;
   __nop();

   _SCLK=0;
   __nop();
   _RST=1;
   __nop();

   for ( i = 0; i < 8; i++)
   {   
       _DSIO=ds1302_addr_w&0x01;
       ds1302_addr_w>>=1;

       _SCLK=1;
       __nop();
       _SCLK=0;
       __nop();

   }
   
   for ( i = 0; i < 8; i++)
   {   
       _DSIO=ds1302_data&0x01;
       ds1302_data>>=1;

       _SCLK=1;
       __nop();
       _SCLK=0;
       __nop();

   }

   _RST=0;
   __nop();
}


uchar Ds1302Read(uchar ds1302_addr_r)
{
   uint i=0,ds1302_data_r,temp;

   _RST=0;
   __nop();

   _SCLK=0;
   __nop();
   _RST=1;
   __nop();


   for(i=0; i<8; i++)
	{
		_DSIO = ds1302_addr_r & 0x01;
		ds1302_addr_r >>= 1;
		_SCLK = 1;
		__nop();
		_SCLK = 0;
		__nop();
	}

    __nop();
    
   for ( i = 0; i < 8; i++)
   {
       temp=_DSIO;
       ds1302_data_r= (ds1302_data_r>>1) | (temp<<7);

       _SCLK=1;
       __nop();
       _SCLK=0;
       __nop();
   }
   
    _RST=0;
    __nop();
    _SCLK=1;
    __nop();
    _DSIO=0;
    __nop();
    _DSIO=1;
    __nop();


    return ds1302_data_r;

}


void Ds1302Init()
{
    
    uint i=0;
    Ds1302Write(0x8e,0);
    clock_address_p=clock_address_w;
    for ( i = 0; i < 7; i++)
    {
        Ds1302Write(*(clock_address_p+i),*(TIME_P+i));
    }
    Ds1302Write(0x8e,0x80);

}


void Ds1302ReadTime()
{
    
    uint i=0;
    clock_address_p=clock_address_r;
    for ( i = 0; i < 7; i++)
    {
        *(TIME_P+i)=Ds1302Read(*(clock_address_p+i));
    }
    
}

led_1602.h

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#ifndef _LED_1602_H_
#define _LED_1602_H_

#include <at89x52.h>

#ifndef uchar
#define uchar unsigned char
#endif

#ifndef uint 
#define uint unsigned int
#endif


__sbit __at 0xA6 _LED_RS;
__sbit __at 0xA5 _LED_RW;
__sbit __at 0xA7 _LED_E;

#define LED_IO P0



void _1602_busy();
void _1602_init();
void _1602_command(uint com);
void _1602_data(uint data);



#endif

led_1602.c

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#include "led_1602.h"


void _1602_init()
{
    P1=P1&0xf0;
    _1602_command(0x38); 
    _1602_command(0x0c);
    _1602_command(0x06);
    _1602_command(0x01);

}


void _1602_command(uint com)
{
    _1602_busy();
    _LED_RS=0;
    _LED_RW=0;
    LED_IO=com;
    _LED_E=1;
    _LED_E=0;


    
}


void _1602_data(uint data)
{
    _1602_busy();
    _LED_RS=1;
    _LED_RW=0;
    LED_IO=data;
    _LED_E=1;
    _LED_E=0;

}


void _1602_busy()    //忙检测函数，判断bit7是0，允许执行；1禁止
{
    unsigned char sta;      //
    LED_IO = 0xff;
    _LED_RS = 0;
    _LED_RW = 1;
    do
    {
        _LED_E = 1;
        sta = LED_IO;
        _LED_E = 0;    //使能，用完就拉低，释放总线
    }while(sta & 0x80);
}

makefile

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src=$(wildcard ./*.c)

target=project

cc=sdcc
cflags=-mmcs51 --model-large 


main.hex:main.ihx
	packihx main.ihx > main.hex


main.ihx: main.c ds1302.rel led_1602.rel
	$(cc)  $(cflags) main.c ds1302.rel led_1602.rel




ds1302.rel:ds1302.c
	$(cc)  $(cflags) -c ds1302.c

led_1602.rel:led_1602.c
	$(cc)  $(cflags) -c led_1602.c



.PHONY:clean
clean:
	-rm -rf  *.lk *.bin *.asm *.lst *.mem *.rst *.lnk *.rel *.sym *.ihx *.hex *.map

运行截图

https://kod.erf172.tk/index.php?user/publicLink&fid=2b64-1p3OoyDXWfkpHeHDgkDd4mr6K15WMiupINtI7hO3TGBVbdr0tdR3ziLEju7c64IRUEM6e0X-PrhaHzZUqtZXRk9rw0Ls70r-OGjQ8JaqChdKI2_z9TUkZqeFvUIzYPapxj5mkdXWWHpTw&file_name=/ds1302.jpeg


感谢阅读，可不可以扫一下码支持一下作者呢。
博客内容遵循 署名-非商业性使用-相同方式共享 4.0 国际 (CC BY-NC-SA 4.0) 协议

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