单片机——ds1302时钟芯片

#include
#include <./lcd1302/lcd1302.h>
#include "intrins.h"
#include "./delay/delay.h"
#include "stdio.h"

bit ack = 0;
sbit ds = P1^0;

#define ds1302_sec_add     0x80  //??êy?Yµ??·
#define ds1302_min_add     0x82  //·?êy?Yµ??·
#define ds1302_hr_add       0x84  //ê±êy?Yµ??·
#define ds1302_date_add     0x86  //è?êy?Yµ??·
#define ds1302_month_add    0x88  //??êy?Yµ??·
#define ds1302_day_add     0x8a  //D??úêy?Yµ??·
#define ds1302_year_add     0x8c  //?êêy?Yµ??·
#define ds1302_control_add  0x8e  //????êy?Yµ??·
#define ds1302_charger_add  0x90      
#define ds1302_clkburst_add  0xbe

sbit SCK = P2^2;
sbit IO = P2^1;
sbit RST = P2^0;

unsigned char timebuf[7] = {23,59,55,16,8,17,3};
unsigned char writebuf[7];
unsigned char readbuf[7];
unsigned char disbuf[7];

void ds1302_write_byte(unsigned char addr, unsigned char byte)
{
    unsigned char i;
   addr = addr & 0xfe;
   SCK = 0;
   RST = 0;
  
   RST = 1;
   for(i = 0; i < 8; i++)
   {
        IO = addr & 0x01;
     SCK = 0;
     SCK = 1;
     addr >>= 1;
    }
  for(i = 0; i < 8; i++)
   {
        IO = byte & 0x01;
     SCK = 0;
     SCK = 1;
     byte >>= 1;
    }
}

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;
}

void ds1302_write_time()
{
    unsigned char temp;
   unsigned char temp1;
   unsigned char i;
 
   for(i = 0; i < 7; i++)
   {
        temp = timebuf[i]/10;
     temp1 = timebuf[i]%10;
     disbuf[i] = (temp << 4) | temp1;
    }
  
  ds1302_write_byte(ds1302_control_add, 0x00);
  ds1302_write_byte(ds1302_hr_add, disbuf[0]);
  ds1302_write_byte(ds1302_min_add, disbuf[1]);
  ds1302_write_byte(ds1302_sec_add, disbuf[2]);
  ds1302_write_byte(ds1302_year_add, disbuf[3]);
  ds1302_write_byte(ds1302_month_add, disbuf[4]);
  ds1302_write_byte(ds1302_date_add, disbuf[5]);
  ds1302_write_byte(ds1302_day_add, disbuf[6]);
  ds1302_write_byte(ds1302_control_add, 0x80);
}
void ds1302_read_time()
{
    unsigned char temp;
   unsigned char temp1;
   unsigned char i;
 
   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];
   unsigned char datebuf[12];
   unsigned char weekbuf[3] = {0};
 
   lcddisbuf[0] = (disbuf[0]/10)+0x30;
   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;
   lcddisbuf[8] = '\0';

   lcd_str_display(0,0,lcddisbuf);
 
   datebuf[0] = (disbuf[3]/10)+0x30;
   datebuf[1] = (disbuf[3]%10)+0x30;
   datebuf[2] = '-';
   datebuf[3] = (disbuf[4]/10)+0x30;
   datebuf[4] = (disbuf[4]%10)+0x30;
   datebuf[5] = '-';
   datebuf[6] = (disbuf[5]/10)+0x30;
   datebuf[7] = (disbuf[5]%10)+0x30;
   datebuf[8] = '\0';

   lcd_str_display(2,1,datebuf);
  
  weekbuf[0] = (disbuf[6]/10)+0x30;
   weekbuf[1] = (disbuf[6]%10)+0x30;
  
  if(weekbuf[1] == '1')
  {
     lcd_str_display(11,1,"Mon");
  }
  if(weekbuf[1] == '2')
  {
     lcd_str_display(11,1,"Tues");
  }
  if(weekbuf[1] == '3')
  {
     lcd_str_display(11,1,"Wed");
  }
  if(weekbuf[1] == '4')
  {
     lcd_str_display(11,1,"Thur");
  }
  if(weekbuf[1] == '5')
  {
     lcd_str_display(11,1,"FRI");
  }
  if(weekbuf[1] == '6')
  {
     lcd_str_display(11,1,"Sat");
  }
  if(weekbuf[1] == '7')
  {
     lcd_str_display(11,1,"SUN");
  }
}

void ds_reset()
{
   ds = 1;
   ds = 0;
   delay_us(200);
   delay_us(200);
 
   ds = 1;
   delay_us(30);
 
   if(ds == 0)
  {
     ack = 1;
  }
  else
  {
     ack = 0;
    }
  
  delay_us(200);
  delay_us(100);
}

void ds_send_byte(unsigned char byte)
{
   unsigned char i;
  
   for(i = 0; i < 8; i++)
   {
     ds = 0;
     _nop_();
     _nop_();
    
     ds = byte & 0x01;
     byte >>= 1;
      delay_us(30);
     ds = 1;
    }
  
  delay_us(30);
}

bit ds_read_bit()
{
   bit temp;
   ds = 1;
   ds = 0;
   _nop_();
   _nop_();
 
   ds = 1;
   temp = ds;
   delay_us(30);
   return temp;
}

unsigned char ds_read_byte()
{
   unsigned char i,j,k;
 
   for(i = 0; i < 8; i++)
   {
     j = ds_read_bit();
     k = (j << 7) | (k >> 1);
    }
  return k;
}

void main()
{
   unsigned char a;
   unsigned int b,temp;
   float wendu;
   unsigned char displaybuf[20];
 
    lcd_init();
   ds1302_write_time();
   while(1)
  {
     ds1302_read_time();
     lcd_dis_time();
   
      ds_reset();
       ds_send_byte(0xcc);
     ds_send_byte(0x44);
   
     ds_reset();
     ds_send_byte(0xcc);
     ds_send_byte(0xbe);
   
     a = ds_read_byte();
     b = ds_read_byte();
   
     temp = (b << 8) | a;
     wendu = (float)temp * 0.0625;
     sprintf(displaybuf,"%7.3f",wendu);
     lcd_str_display(9,0,displaybuf);
  }

}