51单片机PWM的占空比数码管显示

51核心板上面遇到一个问题，打算将用key1，key2，控制led灯的功率，外加将占空比在数码管上输出，代码如下，但没办法正常运行，数码管闪烁，led灯不亮，究竟是什么问题，我找不到问题出在那里

#include <reg52.h>
sbit led1=P2^4;
sbit BEEP=P1^0;
sbit SEL0=P2^0;
sbit SEL1=P2^1;
sbit SEL2=P2^2;
sbit SEL3=P2^3;
sbit key1=P3^2;
sbit key2=P3^3;
static arrshumagaun[]={0x03 , 0x9f , 0x25 , 0x0d , 0x99 , 0x49 , 0x41 , 0x1f , 0x01 , 0x09};
static int i=0,s=0,k=0,m;
static void delay(int nms);
 static unsigned int s_iDuty = 50; 
static void delay(int nms)
{
int i,j;
    for (i=0;i<nms;i++)
    {  
                for (j=0;j<123;j++){}
    }
}
static void InitInterrupt(void);
static void InitTimer0(void);
static void InitInterrupt()
{
    
  ET0 = 1;  
  EA  = 1;   
}
static void InitTimer0()
{
  TMOD = 0x02;
  TH0  = 0xFF;  
  TL0  = 0x9C; 
  TR0  = 1;   
}
void main()
{
  InitInterrupt();
  InitTimer0();     
  while (1)
  {
    if (key1==0)
    {
    s_iDuty+=10;
    }
    if (key2==0)
    {
    s_iDuty-=10;
    }
    
    P0=arrshumagaun[s_iDuty];
    SEL0=0;
    delay(3);
    SEL0=1;
    
    P0=arrshumagaun[s_iDuty];
    SEL1=0;
    delay(3);
    SEL1=1;
    
    P0=arrshumagaun[s_iDuty];
    SEL2=0;
    delay(3);
    SEL2=1;
    
  }
}
void Timer0_Handler () interrupt 1
{
  static unsigned int s_iCnt1 = 0;  
  s_iCnt1++;
  if(s_iCnt1 >= 100)      
  {
    s_iCnt1 = 0;         
  }
  if(s_iCnt1 <= s_iDuty)   
  {
    led1 = 1;   
  }
  else
  { 
    led1 = 0;  
  }
}

不多说了自己去对比