51的DS1302(时钟)功能函数

#include <reg52.h>
#include "./delay/delay.h"


#define ds1302_sec_add 0x80
#define ds1302_min_add 0x82
#define ds1302_hr_add 0x84
#define ds1302_date_add 0x86
#define ds1302_month_add 0x88
#define ds1302_day_add 0x8a
#define ds1302_year_add 0x8c
#define ds1302_control_add 0x8e
#define ds1302_charger_add 0x90  
#define ds1302_clkburst_add 0xbe




#define LCDPORT P0
#define LCD_WRITE_DATA 1
#define LCD_WRITE_COM 0


sbit RS = P2^4;
sbit RW = P2^5;
sbit E = P2^6;


sbit SCK = P3^5;
sbit IO = P3^6;
sbit RST = P3^7;


unsigned char timebuf[7] = {17,34,30,16,8,17,3};
unsigned char tempbuf[7];
unsigned char disbuf[7];
unsigned char readbuf[7];
unsigned char writebuf[7];
/*------------------------------------------------
LCD函数
------------------------------------------------*/
void lcd_write(unsigned char byte,unsigned char flag)
{
    if(flag)
{
RS = LCD_WRITE_DATA;
}
else 
{
RS = LCD_WRITE_COM;
}
RW = 0;
E = 1;
LCDPORT = byte;
delay_us(10);
E = 0;
}


void lcd_dis_char(unsigned char x,unsigned char y,unsigned char byte)
{
    if(y == 0)
{
lcd_write(x + 0x80,LCD_WRITE_COM);
}
else
{
lcd_write(x + 0x80 + 0x40,LCD_WRITE_COM);
}
lcd_write(byte,LCD_WRITE_DATA);
}




void lcd_dis_str(unsigned char x,unsigned char y,unsigned char *src)
{
if(y == 0)
{
lcd_write(x + 0x80,LCD_WRITE_COM);
}
else
{
lcd_write(x + 0x80 + 0x40,LCD_WRITE_COM);
}
while(*src != '\0')
{
lcd_write(*src,LCD_WRITE_DATA);
src++;
}
}


void lcd_init()
{
 delay_ms(15);
 lcd_write(0x38,LCD_WRITE_COM);
 delay_ms(5);
 lcd_write(0x38,LCD_WRITE_COM);
 delay_ms(5);
 lcd_write(0x38,LCD_WRITE_COM);
 delay_ms(5);
 lcd_write(0x38,LCD_WRITE_COM);
 delay_ms(5);
 lcd_write(0x08,LCD_WRITE_COM);
 delay_ms(5);
 lcd_write(0x01,LCD_WRITE_COM);
 delay_ms(5);
 lcd_write(0x06,LCD_WRITE_COM);
 delay_ms(5);
 lcd_write(0x0c,LCD_WRITE_COM);
 delay_ms(5);  
}
/*------------------------------------------------
       向DS302写入一字节数据
------------------------------------------------*/
void ds1302_write_byte(unsigned char addr,unsigned char byte)
{
unsigned char i;
addr = addr & 0xfe;//最低位置零
SCK = 0;
RST = 0;

RST = 1;
for(i = 0;i < 8;i++)//写入目标地址：addr
{
IO = addr & 0x01;
SCK = 0;
SCK = 1;
addr >>= 1;
}
for(i = 0;i < 8;i++)//写入数据
{
IO = byte & 0x01;
SCK = 0;
SCK = 1;
byte >>= 1;
}
SCK = 0;
RST = 0;
}
/*------------------------------------------------
           从DS302读入一字节数据
------------------------------------------------*/
unsigned char ds1302_read_byte(unsigned char addr)
{
unsigned char i;
unsigned char temp = 0;
addr = addr & 0xfe; 
SCK = 0;
RST = 0;

RST = 1;
addr = addr + 1;
for(i = 0;i < 8;i++)
{
IO = addr & 0x01;
SCK = 0;
SCK = 1;
addr >>= 1;
}
for(i = 0;i < 8;i++)
{
SCK = 1;
SCK = 0;
temp >>= 1;
if(IO)
{
temp += 0x80;
}
}
RST = 0;
return temp;
}
/*------------------------------------------------
        向DS1302写入时钟数据
------------------------------------------------*/
void dis1302_write_time()
{
unsigned char i ;
unsigned char temp;
unsigned char temp1;
for(i = 0;i < 7;i++)
{
temp = timebuf[i] / 10;
temp1 = timebuf[i] % 10;
writebuf[i] = (temp << 4) | temp1;
}
ds1302_write_byte(ds1302_control_add,0x00);//关闭写保护

ds1302_write_byte(ds1302_hr_add,writebuf[0]);//时
ds1302_write_byte(ds1302_min_add,writebuf[1]);//分
ds1302_write_byte(ds1302_sec_add,writebuf[2]);//秒 
ds1302_write_byte(ds1302_year_add,writebuf[3]);//年
    ds1302_write_byte(ds1302_month_add,writebuf[4]);//月
ds1302_write_byte(ds1302_date_add,writebuf[5]);//日
ds1302_write_byte(ds1302_day_add,writebuf[6]);//星期

ds1302_write_byte(ds1302_control_add,0x80);//打开写保护
}
/*------------------------------------------------
         从DS1302读出时钟数据
------------------------------------------------*/
void ds1302_read_time()
{
unsigned char i;
unsigned char temp = 0;
unsigned char temp1;
readbuf[0] = ds1302_read_byte(ds1302_hr_add);
readbuf[1] = ds1302_read_byte(ds1302_min_add);
readbuf[2] = ds1302_read_byte(ds1302_sec_add);
readbuf[3] = ds1302_read_byte(ds1302_year_add); 
    readbuf[4] = ds1302_read_byte(ds1302_month_add); 
    readbuf[5] = ds1302_read_byte(ds1302_date_add); 
    readbuf[6] = ds1302_read_byte(ds1302_day_add);
for(i = 0;i < 7;i++)
{
temp = (readbuf[i] >> 4);
temp1 = (readbuf[i] & 0x0f);
disbuf[i] = temp * 10 + temp1;
}
}


void lcd_dis_time()
{

unsigned char lcddisbuf[9] = {0};
unsigned char lcddisbuf1[9] = {0};
    unsigned char week_day[][5] = {
"Mon ",
"Tue ",
"Wed ",
"Thur",
"Fri ",
"Sat ",
"Sun "
};

lcddisbuf[0] = (disbuf[0] / 10) + 0x30;//时间

lcddisbuf[1] = (disbuf[0] % 10) + 0x30;

lcddisbuf[2] = ':';
lcddisbuf[3] = (disbuf[1] / 10) + 0x30;
lcddisbuf[4] = (disbuf[1] % 10) + 0x30;
lcddisbuf[5] = ':';
lcddisbuf[6] = (disbuf[2] / 10) + 0x30;
lcddisbuf[7] = (disbuf[2] % 10) + 0x30;

lcddisbuf1[0] = (disbuf[3] / 10) + 0x30;//日期
lcddisbuf1[1] = (disbuf[3] % 10) + 0x30;
lcddisbuf1[2] = '/';
lcddisbuf1[3] = (disbuf[4] / 10) + 0x30;
lcddisbuf1[4] = (disbuf[4] % 10) + 0x30;
    lcddisbuf1[5] = '/';
lcddisbuf1[6] = (disbuf[5] / 10) + 0x30;
lcddisbuf1[7] = (disbuf[5] % 10) + 0x30;




lcd_dis_str(4,0,lcddisbuf);
lcd_dis_str(2,1,lcddisbuf1);
lcd_dis_str(13,1,week_day[disbuf[6] - 1]);
}


void main()
{
lcd_init();
dis1302_write_time();
lcd_dis_str(0,1,"20");

while(1)
{
ds1302_read_time();
lcd_dis_time();
}
}