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#include<reg52.h>
#define uchar unsigned char
#define unit unsigned int
#define DS1302_WRITE 0x80
#define DS1302_READ 0x81
uchar time[]={0,0,8};
uchar code tab0[]={"11-21 : : "};
uchar code tab1[]={"STATE: "};
sbit en=P3^3;
static uchar string[3],state[3];
sbit RS=P1^5;
sbit RW=P1^6;
sbit E=P1^7;
sbit busy=P2^7;
sbit ce =P1^0;
sbit scl=P1^1;
sbit sda=P1^2;
/****
******* 延時函數(shù)
*****/
void delay(unit x)
{
while(x--);
}
/****
******* 串口初始化函數(shù)
*****/
void uart_init()
{
TMOD=0x20; //9600bps
SCON=0x50;
TH1=0xFD;
TL1=0xFD;
TR1=1;
ES=1;
EA=1;
en=0; //串口一直處于接收狀態(tài)
}
/****
********1602檢測忙函數(shù)
*****/
void check_busy()
{
P2=0xff;
do
{
RS=0;
RW=1;
E=0;
E=1;
} while(busy==1);
E=0;
}
/****
*******1602寫數(shù)據函數(shù)
*****/
void lcd_write_dat(uchar dat)
{
check_busy();
P2=dat;
delay(5);
RS=1;
RW=0;
E=1;
delay(5);
E=0;
delay(5);
}
/****
*******1602寫命令函數(shù)
*****/
void lcd_write_com(uchar com)
{
check_busy();
P2=com;
delay(5);
RS=0;
RW=0;
E=1;
delay(5);
E=0;
delay(5);
}
/****
*******1602寫字符串函數(shù)
*****/
void lcd_write_str(uchar add,uchar *dat)
{
lcd_write_com(add);
while(*dat != '\0')
{
lcd_write_dat(*dat++);
}
}
/****
*******1602寫時間函數(shù)
*****/
void lcd_write_time(uchar add,uchar date)
{
uchar shi,ge;
shi=date/16;
ge=date%16;
lcd_write_com(add);
lcd_write_dat(shi+'0');
lcd_write_dat(ge+'0');
}
/****
*******1602初始化函數(shù)
*****/
void lcd_init()
{
lcd_write_com(0x38);
delay(20000);
lcd_write_com(0x0c);
delay(20000);
lcd_write_com(0x06);
delay(20000);
lcd_write_com(0x01);
delay(20000);
}
/****
******* DS1302復位函數(shù)
*****/
void DS1302_ret()
{
ce=0;
scl=0;
ce=1;
}
/****
******* DS1302寫一個字節(jié)函數(shù)
*****/
void DS1302_write_byte(uchar byte)
{
uchar i;
for(i=0;i<8;i++)
{
sda=byte&0x01;
scl=1;
byte>>=1;
scl=0;
}
}
/****
******* DS1302讀一個字節(jié)函數(shù)
*****/
uchar DS1302_read_byte()
{
uchar i,byte=0;;
for(i=0;i<8;i++)
{
byte>>=1;
if(sda)
byte|=0x80;
scl=1;
scl=0;
}
return byte;
}
/****
******* DS1302設置些保護函數(shù)
*****/
void DS1302_set_WP()
{
DS1302_ret();
DS1302_write_byte(0x8e);
DS1302_write_byte(0x80);
sda=0;
ce=0;
}
/****
******* DS1302刪除保護函數(shù)
*****/
void DS1302_chear_WP()
{
DS1302_ret();
DS1302_write_byte(0x8e);
DS1302_write_byte(0);
sda=0;
ce=0;
}
/****
******* DS1302寫地址與數(shù)據函數(shù)
*****/
void DS1302_write_date(uchar add,uchar date)
{
DS1302_ret();
DS1302_write_byte(add);
DS1302_write_byte(date);
sda=0;
ce=0;
}
/****
******* DS1302指定地址讀數(shù)據函數(shù)
*****/
uchar DS1302_read_date(uchar add)
{
uchar date=0;
DS1302_ret();
DS1302_write_byte(add);
date=DS1302_read_byte();
sda=0;
ce=0;
return (date);
}
/****
******* DS1302設定時間函數(shù)
*****/
void DS1302_set_time(uchar *timedate)
{
uchar i,temp;
for(i=0;i<7;i++)
{
temp=timedate[i]/10;
timedate[i]=timedate[i]%10;
timedate[i]=timedate[i]+temp*16;
}
DS1302_chear_WP();
temp=DS1302_WRITE;
for(i=0;i<7;i++)
{
DS1302_write_date(temp,timedate[i]);
temp += 2;
}
DS1302_set_WP();
}
/****
******* DS1302讀出時間函數(shù)
*****/
void DS1302_read_time(uchar *timedate)
{
uchar i,temp=0;
temp=DS1302_READ;
for(i=0;i<7;i++)
{
timedate[i]=DS1302_read_date(temp);
temp += 2;
}
}
/****
******* 主函數(shù)
*****/
int main()
{
uart_init();
lcd_init();
lcd_write_str(0x80,tab0);
delay(20000);
lcd_write_str(0xc0,tab1);
DS1302_set_time(&time); //設置時鐘初值
while(1)
{
DS1302_read_time(&time);
lcd_write_time(0x87,time[2]); //時
lcd_write_time(0x8a,time[1]); //分
lcd_write_time(0x8d,time[0]); //秒
lcd_write_com(0xc8);
lcd_write_dat(state[0]);
lcd_write_dat(state[1]);
lcd_write_dat(state[2]);
}
}
/****
******* 串口中斷服務程序函數(shù)
*****/
void ser() interrupt 4
{
uchar i;
if(RI)
{
RI=0;
string[i++]=SBUF;
if(i>2)
i=0;
}
state[i]=string[i];
}

復制代碼

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