单片机proteus中LED显示

Question

#include<reg51.h>
#include<intrins.h>
sbit DS18B20_DQ=P3^3;
sbit LCD_RS = P2^0;
sbit LCD_RW = P2^1;
sbit LCD_EN = P2^2;
typedef unsigned int u8;
typedef unsigned char u16;
typedef float u4;
void LCD_busyCheck()
{
    u8 sta;
    P0=0xff;
    LCD_RS=0;
    LCD_RW=1;
    do{
        LCD_EN=1;
        sta=P0;
        LCD_EN=0;
    }while((sta&0x80)!=0x80);//10000000
}
void LCD_write_x(u8 x)//写单个数据
{
    LCD_busyCheck();
    LCD_RS=1;
    LCD_RW=0;
    P0=x;
    LCD_EN=1;
    LCD_EN=0;
}
void LCD_write_xx(u8 *x)//写单个数据
{
    while(*x)
    {
        LCD_write_x(*x++);//自加
    }
}
void LCD_write_cmd(u8 cmd)//写命令
{
    LCD_busyCheck();
    LCD_RS=0;
    LCD_RW=0;
    P0=cmd;
    LCD_EN=1;
    LCD_EN=0;
}
void LCD_position(bit x,u8 y)
{
    u8 position;
    if(x==0)
        position=0x80+y;
    else
        position=0xc0+y;
}
void main()
{
    u8 i;
    LCD_write_cmd(0x01);
    LCD_write_cmd(0x38);//八位接口，两行显示
    LCD_write_x(0x80);//从第一位开始显示,写地址
    LCD_write_xx("Temperature : ");
    LCD_write_x(0x0c);//从第二行开始显示,写地址
    LCD_write_xx("TEMP: ");
    for(i=0;i<2000;i++);
    while(1)
    {
    }
}

代码运行出来没有错误，但proteus中的显示屏（LCD）没有办法显示，运行的话就是下面的图，什么都没有

这个要怎么改呀

Answer 1

LCD的VSS VDD VEE都悬空怎么显示。