单片机+DS1302可调时钟代码(LCD1602显示)Proteus仿真图 -

#include<reg52.h>
#include<intrins.h>
sbit RST=P1^3;
sbit CLK=P1^4;
sbit IO=P1^5;
sbit RS=P2^5;
sbit RW=P2^6;
sbit E=P2^7;
sbit K1=P3^4; //时间（修改）选择
sbit K2=P3^5; //时间“加”
sbit K3=P3^6; //时间“减”
unsigned char second,minute,hour,day,month,year; //在LCD1602上显示的数值
unsigned char temp_s,temp_min,temp_h,temp_d,temp_mon,temp_y; //暂存从DS1302读出的数据
unsigned char x=0; //选择修改时间中的某一个数值
void Delay()
{
_nop_();
}
void Write_Bit_DS1302(unsigned char DAT) //向DS1302写入一字节的数据
{
unsigned char i;
CLK=0;
Delay();
for(i=0;i<8;i++)
{
IO=DAT&0x01; //低位在前，高位在后
Delay();
CLK=1; //时钟信号上升沿，写入数据
Delay();
CLK=0; //重新拉低CLK，形成脉冲
DAT>>=1; //将DAT的各数据位右移1位，准备写入下一数据位
}
}
void Write_DS1302(unsigned char CMD,unsigned char DAT) //向DS1302写入命令和数据
{
RST=0; //禁止数据传输
CLK=0; //在写入数据前确保CLK置低电平
RST=1; //开始数据传输
Delay();
Write_Bit_DS1302(CMD); //写入命令
Write_Bit_DS1302(DAT); //写入数据
CLK=1;
RST=0;
}
unsigned char Read_Bit_DS1302() //从DS1302读出一字节的数据
{
unsigned char i,DAT;
Delay();
for(i=0;i<8;i++)
{
DAT>>=1;
if(IO==1)
{
DAT|=0x80;
}
CLK=1;
Delay();
CLK=0; //时钟信号下降沿，读出数据
Delay();
}
return DAT;
}
unsigned char Read_DS1302(unsigned char CMD) //向DS1302写入命令后再从DS1302读出数据
{
unsigned char DAT;
RST=0;
CLK=0;
RST=1;
Write_Bit_DS1302(CMD); //写入命令
DAT=Read_Bit_DS1302(); //读出数据
CLK=1;
RST=0;
return DAT;
}
void Init_DS1302() //DS1302初始化
{
Write_DS1302(0x8E,0x00); //允许将数据写入DS1302的寄存器
Write_DS1302(0x80,((0/10)<<4)+(0%10)); //写入“秒”的初始值，需要将LCD1602显示的数值转换成BCD码
Write_DS1302(0x82,((0/10)<<4)+(0%10)); //写入“分”的初始值
Write_DS1302(0x84,((0/10)<<4)+(0%10)); //写入“时”的初始值
Write_DS1302(0x86,((1/10)<<4)+(1%10)); //写入“日”的初始值
Write_DS1302(0x88,((1/10)<<4)+(1%10)); //写入“月”的初始值
Write_DS1302(0x8C,((0/10)<<4)+(0%10)); //写入“年”的初始值
}
void Delay5ms()
{
unsigned char i,j;
_nop_();
i=10;
j=183;
do
{
while(--j);
}
while(--i);
}
int LCD1602_ReadBusy() //LCD1602“读忙”操作
{
int temp;
RS=0;
RW=1;
_nop_();
P0=0xff;
_nop_();
E=1;
_nop_();
temp=P0;
_nop_();
E=0;
return(temp&0x80);
}
void LCD1602_Write_Com(char com) //LCD1602“写命令”操作
{
while(LCD1602_ReadBusy());
RS=0;
RW=0;
E=0;
_nop_();
P0=com;
_nop_();
E=1;
Delay5ms();
E=0;
Delay5ms();
}
void LCD1602_Write_Dat(char dat) //LCD1602“写数据”操作
{
while(LCD1602_ReadBusy());
RS=1;
RW=0;
E=0;
_nop_();
P0=dat;
_nop_();
E=1;
Delay5ms();
E=0;
Delay5ms();
}
void LCD1602_Init() //LCD1602初始化
{
Delay5ms();
Delay5ms();
Delay5ms();
LCD1602_Write_Com(0x38);
Delay5ms();
LCD1602_Write_Com(0x0C);
Delay5ms();
LCD1602_Write_Com(0x06);
Delay5ms();
LCD1602_Write_Com(0x01);
Delay5ms();
}
void LCD1602_Display_Init() //在LCD1602的恒定位置上显示恒定的字符
{
LCD1602_Write_Com(0x80+0x03);
LCD1602_Write_Dat(0x30+2);
LCD1602_Write_Dat(0x30+0);
Delay5ms();
LCD1602_Write_Com(0x80+0x07);
LCD1602_Write_Dat('/');
Delay5ms();
LCD1602_Write_Com(0x80+0x0A);
LCD1602_Write_Dat('/');
Delay5ms();
LCD1602_Write_Com(0x80+0x46);
LCD1602_Write_Dat(':');
Delay5ms();
LCD1602_Write_Com(0x80+0x49);
LCD1602_Write_Dat(':');
Delay5ms();
}
void Display_Second(unsigned char x) //LCD1602显示“秒”的数值
{
unsigned char i,j;
i=x/10;
j=x%10;
LCD1602_Write_Com(0x80+0x4A);
LCD1602_Write_Dat(0x30+i);
LCD1602_Write_Dat(0x30+j);
Delay5ms();
}
void Display_Minute(unsigned char x) //LCD1602显示“分”的数值
{
unsigned char i,j;
i=x/10;
j=x%10;
LCD1602_Write_Com(0x80+0x47);
LCD1602_Write_Dat(0x30+i);
LCD1602_Write_Dat(0x30+j);
Delay5ms();
}
void Display_Hour(unsigned char x) //LCD1602显示“时”的数值
{
unsigned char i,j;
i=x/10;
j=x%10;
LCD1602_Write_Com(0x80+0x44);
LCD1602_Write_Dat(0x30+i);
LCD1602_Write_Dat(0x30+j);
Delay5ms();
}
void Display_Day(unsigned char x) //LCD1602显示“日”的数值
{
unsigned char i,j;
i=x/10;
j=x%10;
LCD1602_Write_Com(0x80+0x0B);
LCD1602_Write_Dat(0x30+i);
LCD1602_Write_Dat(0x30+j);
Delay5ms();
}
void Display_Month(unsigned char x) //LCD1602显示“月”的数值
{
unsigned char i,j;
i=x/10;
j=x%10;
LCD1602_Write_Com(0x80+0x08);
LCD1602_Write_Dat(0x30+i);
LCD1602_Write_Dat(0x30+j);
Delay5ms();
}
void Display_Year(unsigned char x) //LCD1602显示“年”的数值
{
unsigned char i,j;
i=x/10;
j=x%10;
LCD1602_Write_Com(0x80+0x05);
LCD1602_Write_Dat(0x30+i);
LCD1602_Write_Dat(0x30+j);
Delay5ms();
}
void Convert()
{
temp_s=Read_DS1302(0x81);
second=(temp_s>>4)*10+(temp_s&0x0F); //将“秒”的BCD码转换成对应的ASCII值
temp_min=Read_DS1302(0x83);
minute=(temp_min>>4)*10+(temp_min&0x0F); //将“分”的BCD码转换成对应的ASCII值
temp_h=Read_DS1302(0x85);
hour=(temp_h>>4)*10+(temp_h&0x0F); //将“时”的BCD码转换成对应的ASCII值
temp_d=Read_DS1302(0x87);
day=(temp_d>>4)*10+(temp_d&0x0F); //将“日”的BCD码转换成对应的ASCII值
temp_mon=Read_DS1302(0x89);
month=(temp_mon>>4)*10+(temp_mon&0x0F); //将“月”的BCD码转换成对应的ASCII值
temp_y=Read_DS1302(0x8D);
year=(temp_y>>4)*10+(temp_y&0x0F); //将“年”的BCD码转换成对应的ASCII值
}
void Delay10ms()
{
unsigned char i,j;
i=20;
j=113;
do
{
while(--j);
}
while(--i);
}
unsigned char Get_Key() //获取按键值
{
static bit flag=0;
unsigned char k=0;
if((flag==0)&&((K1==0)||(K2==0)||(K3==0)))
{
Delay10ms();
flag=1;
if(K1==0)
{
k=1;
}
else if(K2==0)
{
k=2;
}
else if(K3==0)
{
k=3;
}
}
else if((K1==1)&&(K2==1)&&(K3==1))
{
flag=0;
}
return k;
}
void Set_Time(unsigned char num) //设置DS1302的起始计时
{
unsigned char temp_second,temp_minute,temp_hour,temp_day,temp_month,temp_year; //暂存经过转换后得到的BCD码
switch(num)
{
case 1:
if(++x>6) //时间（修改）选择
{
x=0;
}
break;
case 2: //时间“加”
if(x==1) //年
{
year++;
if(year>99)
{
year=0;
}
temp_year=((year/10)<<4)+(year%10);
Write_DS1302(0x8C,temp_year);
}
if(x==2) //月
{
month++;
if(month>12)
{
month=1;
}
temp_month=((month/10)<<4)+(month%10);
Write_DS1302(0x88,temp_month);
}
if(x==3) //日
{
day++;
if(month==1||month==3||month==5||month==7||month==8||month==10||month==12) //大月有31天
{
if(day>31)
{
day=1;
}
}
else if(month==4||month==6||month==9||month==11) //小月有30天
{
if(day>30)
{
day=1;
}
}
else if(month==2&&(year%4==0)) //闰年的二月有29天
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