ds18b20+12864+AT89s52+时间显示

#include <reg52.h>
#include <intrins.h>
#include <stdlib.h> 
#define uchar unsigned char
#define uint  unsigned int
/*MJ12864C 端口定义*/
#define LCD_data  P0             //数据口
sbit LCD_RS  =  P2^0;            //寄存器选择输入 
sbit LCD_RW  =  P2^1;            //液晶读/写控制
sbit LCD_EN  =  P2^2;            //液晶使能控制
sbit LCD_PSB =  P2^3;            //串/并方式控制
sbit LCD_RST =  P2^5;            //液晶复位端口
sbit DQ=P3^4;                    //ds18b20与单片机连接口

uchar display[]= {0x00,0x00,0x00,0x00,0x00,0x00};// 时间显示程序
char code SST516[3] _at_ 0x003b;



uchar data disdata[5];          //温度程序
uint tvalue;//温度值
uchar tflag;//温度正负标志




bit settime,updown;
uchar  msec,sec,m,count,min=00,hour=00; // 时间显示程序
//uchar dis1[10];
uchar code dis1[] = {"dolphin        "};

uchar code dis2[] = {"time:"};
uchar code dis3[] = {"温度:"};
uchar code dis4[] = {"+--------+ "};
uchar code dis5[] = {" RESET REALTIME "};
//延时程序
void delay_1ms(uint x)
 {
    uint i,j;
    for(j=0;j<x;j++)
    for(i=0;i<110;i++);
 }
//写指令
void LCD_write_instruction(uchar cmd)
{                          
   
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_EN = 0;
    P0 =cmd;
    delay_1ms(5);
    LCD_EN = 1;
    delay_1ms(5);
    LCD_EN = 0; 
}
//写数据
void LCD_write_data(uchar dat)
{
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_EN = 0;