STC8H的单片机打印ADC采集电压输出为0

单片机小BAI..。
求.路.大.，STC8H单片机打印ADC采集电压输出为0，以下图一是STC官网下载的程序

#include "stc8h.h"
#include "intrins.h"

#define FOSC    11059200UL
#define BRT     (65536 - FOSC / 115200 / 4)

#define USBCHIPID
#define CPUIDBASE   0xfde0
#define VREF_ADDR   (*(unsigned int volatile xdata *)(CPUIDBASE + 0x07))

bit busy;

void UartIsr() interrupt 4
{
    if (TI)
    {
        TI = 0;
        busy = 0;
    }
    if (RI)
    {
        RI = 0;
    }
}

void UartInit()
{
    SCON = 0x50;
    TMOD = 0x00;
    TL1 = BRT;
    TH1 = BRT >> 8;
    TR1 = 1;
    AUXR = 0x40;
    busy = 0;
}

void UartSend(char dat)
{
    while (busy);
    busy = 1;
    SBUF = dat;
}

void ADCInit()
{
    P_SW2 |= 0x80;
    ADCTIM = 0x3f;                             
    P_SW2 &= 0x7f;

    ADCCFG = 0x2f;                              
    ADC_CONTR = 0x8f;                           
}


void ADC()
{
    P_SW2 |= 0x80;      

    P0M0 = 0x00;
    P0M1 = 0x00;
    P1M0 = 0x00;
    P1M1 = 0x00;
    P2M0 = 0x00;
    P2M1 = 0x00;
    P3M0 = 0x00;
    P3M1 = 0x00;
    P4M0 = 0x00;
    P4M1 = 0x00;
    P5M0 = 0x00;
    P5M1 = 0x00;

    UartInit();
    ES = 1;
    EA = 1;
    UartSend(VREF_ADDR >> 8);   
    UartSend(VREF_ADDR);        

    
}

#include "reg51.h"
#include "intrins.h"
#include 
#include 


void main(){
    ADCInit();
    UartInit();
    ADC();
     
    
     while(1)
{

    printf("%d\r\n",VREF_ADDR);
    
    
}

}

#ifndef     __ADC8H_H__
#define     __ADC8H_H__

ADCInit();
UartInit();
ADC();
int VREF_ADDR;

你的代码里从来就没有去读过ADC，你读的是这个
#define VREF_ADDR (*(unsigned int volatile xdata *)(CPUIDBASE + 0x07))
不知道你这个怎么来的。