#include
sbit LED_0 = P1^0;

sbit LED_1 = P1^1;

unsigned Pwm = 0;   //  控制 LED_0 的有暗到亮   其中LED_1 作为对比

unsigned Count=0;

void Time_Init(void)
{
   TMOD = 0x02; //定时器0 定时，方式2
   TH0 = 0x9c;  //100us
 TL0 = 0x9c;
   EA = 1;
   ET0 = 1;
   TR0 = 1;
}

void Int0_Init(void)
{
   IT0=1;   //设置下降沿触发
   EA=1;    //开总中断
   EX0=1;   //开外部中断
}

void Int1_Init(void)
{
   IT1=1;   //设置下降沿触发
   EA=1;    //开总中断
   EX1=1;   //开外部中断
}

void main(void)
{
    Time_Init();
    Int0_Init();
    Int1_Init();
    LED_0 = 0;
    LED_1 = 0;
    while(1);
 
}

void INT_Time0() interrupt 1 using 1
{
 Count++;
 if(Count==100)
 {
    Count=0;
 }
   if(Count<=Pwm)
   {
       LED_0 = 0;
   }
   else
   {
       LED_0 = 1;
   }
}

void Int0() interrupt 0
{
   if(Pwm<=94)
   {
    Pwm=Pwm+5;  //此时占空比为Pwm/100
   }
   else
   {
      Pwm=99;
 }
}

void Int1() interrupt 2
{
   if(Pwm>=5)
   {
    Pwm=Pwm-5;
   }
   else
   {
      Pwm=0;
 }
}