温度传感18b20+DS1302+LCD1602程序

#include <reg51.h>
#include<intrins.h>
#define  uchar  unsigned char
#define  uint   unsigned int
uchar code dis[]={'0','1','2','3','4','5','6','7','8','9',0x3a,0xa0,0x2d};
uchar code dis1[]={'T','i','m','e',':'};
uchar code dis2[]={'D','a','t','e',':'}; 
uchar data ntime[5];           
uchar data  time[8]={0,2,10,0,0,10,0,0}; 
uchar data  date[8]={0,0,12,0,0,12,0,0};
unsigned data  s,min,hour,date1,moon,year,day,nmin=0,nhour=1,t50ms=0;
uchar i,chang=0;
void set_time(void);
sbit  BUZZER=P2^7;

sbit  fun_key=P1^0;
sbit  rs=P2^0;
sbit  rw=P2^1;
sbit  lcdep=P2^2;
sbit  busy=P0^7;

sbit  ACC_7=ACC^7;        //位寻址寄存器定义
sbit  DS_CLK=P3^6;        // DS1302时钟信号
sbit  DS_IO=P3^7;       // DS1302数据信号
sbit  DS_RST=P3^5;       // DS1302片选

#define nop() _nop_()
sbit  DS18B20_DQ = P2^5;
uchar DS18B20_ID[8];
uchar Temp=0;

#define  KEY_IN     P1 
unsigned data  keytemp,key;   
unsigned data  flag=0x00;
bit  flag_key=0;

delay(uchar t)         //延时
{
uchar i;
for(t; t>0; t--)
  for(i=0;i<120;i++);
}

/************液晶驱动程序***********/
void check()        // 判断忙或闲
{
do
{
P0=0xff;
rs=0;
rw=1;
lcdep=0;
delay(1);
lcdep=1;
}while(busy==1);
}

void write_com(uchar com)   //写指令
{
P0=com;