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只用到了延时子程序，在亮度调节和频率的调节上花了点时间
程序如下：没图啊啊啊啊   图在另一部手机      这部手机在女朋友那。。。。悲催了。。。。

#include <stc.h>
#include <intrins.h>
sbit IRIN =P1^0;
sbit led=P1^7;
bit onoff_enable;
#define Freq 24
#define TIMER1 0xf3    //baud rate 4800
#define uart
#define uchar unsigned char
#define   TIMEDELAY 1  //中断时间1ms
#define th0_para (uchar)((65536-(Freq/12)*1000*TIMEDELAY)>>8)
#define tl0_para (uchar)(65536-(Freq/12)*1000*TIMEDELAY)
#define pwm_total 30
#define pwm_default 15
unsigned char buff1[8];
uchar jump_table[7] ={0xfe,0xfd,0xfb,0xfc,0xfa,0xf9,0xf8};
uchar led_counter =0;
uchar counter =0;
uchar INDEX;
uchar pwm;
uchar pw_on;
/*void delayus(unsigned char dlycnt)   //延时80*us
{
 unsigned char i;
 unsigned char k =dlycnt;
 while(k--)
 {
  i =100;
  while(--i);
 }

}*/
void delayus(unsigned char t)    //delay 50us(90)
{
 unsigned char i;
 for(i=0;i<t;i++);
}
/*void timer0_init(void)     //定时器0，用于设置占空比，达到调节led亮度的作用
{
  TMOD |=0X01;
  TH0 =th0_para;
  TL0 =tl0_para;

}*/
#ifdef uart
void Uart_Init(void)
{
 ET1 =0;
 ES =0;
 SCON = 0x50;  //串口方式1，允许接收
 TMOD |= 0x20;  //定时器1工作方式2，定时器0工作方式1
 PCON |=0X80;   //4800 *2
 TH1 = TIMER1; 
 TL1 = TIMER1; 
 TR1 = 1;  //启动定时器1
}

void uart_send(unsigned char ch)
{
 TI =0;
 SBUF =ch;
 while(!TI);
 TI =0;
}
#endif
unsigned char receive(unsigned char *receivebuff)    //receive Low Level first, if skip, data no meaning
{
 unsigned char bytecount;
 unsigned char bitcount;
 unsigned char counter1,counter2;//c0,c1,byt,bt;
 unsigned char *pchar =receivebuff;
// unsigned char max =0;
// lowflag =0;
// highflag =0;
 pchar[0] =0x00;
 pchar[1] =0x00;
 pchar[2] =0x00;
 pchar[3] =0x00;    //clear buffer first
 pchar[4] =0x00;
 pchar[5] =0x00;
 for(bytecount =0; bytecount <6;bytecount ++)
 {
//  counter1 =0;  //clear counter
  for(bitcount =0; bitcount<8;bitcount++)
  { 
   counter1 =0;
   while(!IRIN)
   {
    delayus(90);   //delay 50us
    counter1++;
//    if(counter1>19){*pchar<<=1;}
    if(counter1 > 50) return 0; //overtime
//    lowflag =1;  
//    if(counter1>6)   break;
   }
   if(counter1 <6)   //if <500us, is jam
   {
//    lowflag =0;    //pulse too short,clear flag and return
    return 0;
   }
   
//   if(lowflag ==0) return 0;  //if no low level first, jump out directly to save time
   counter2 =0;
   while(IRIN)
   {
    delayus(90);   //delay 50us
    counter2 ++;
//   if(counter2 >19) {*pchar |=0x01; *pchar <<=1;}
    if(counter2 > 50) return 0;
   }
   if(counter2 < 6)
   {
    return 0;
   }
   *pchar <<=1;
   if(counter2 >19) *pchar |=0x01;      //counter2  > 18 or 19  read as '1'

//   if(max <=counter2)  max =counter2;
   }
   pchar ++;
 }
// #ifdef uart
// uart_send(max);
// #endif
 
 return 1;
// delayus(1800);    //delay 1ms
}
void int_init(void)
{
 ET0 =1;
 EA =1;
 TR0 =1;
}
void timer0_isr(void) interrupt 1
{
 if(!onoff_enable)
 {
  
  pwm++;
  if(pwm <= pwm_total)
  {
   if(pwm<=pw_on)
   led=1;
//   P1 =jump_table[INDEX];
//   else P1 =0xff;
   else led=0;
  }
  else pwm =0;
//  if(pwm == pwm_total) pwm =0;
  
/*  if(++counter ==10)
  {
   counter =0;
   if(++led_counter ==200)
   {
    led_counter =0;
    if(++INDEX ==7)INDEX =0;
   }
  }*/
  
 }
 else led=1;
 TH0 = th0_para;
 TL0 += tl0_para;
// TL0 = tl0_para;
}
void io_init(void)
{
  P1M0 &=~(1<<7);
  P1M1 |=(1<<7);
}
void main(void)
{
 #ifdef uart
 Uart_Init();
 #endif
// timer0_init();
// io_init();
 int_init();
 pwm=0;
 pw_on =pwm_default;
 INDEX =0;
// led=0;
// uart_send(0x55);
 while(1)
 { 
  if(receive(&buff1)==1)
  {
//  if((buff1[0]==0x11)&&(buff1[1]==0x11))
//   {
//    if((buff1[2]==0x81)&&(buff1[3]==0x88))
//    {
//     if((buff1[4]==0x88)&&(buff1[5]==0x88)) 
//     {
//      if((buff1[6]==0x88)&&(buff1[7]==0x18))
//      {
//      onoff_enable =!onoff_enable;
//      return;
//      led=1;
//      }
//      else led=0; 
//     }
//    }
//    if((buff1[2]==0xc0)&&(buff1[3]==0x3f))
//    {
//     pwm_on++;
//     if(pwm_on >=pwm_total)pwm_on =pwm_total;
//     return; 
//    }
//    if((buff1[2]==0x40)&&(buff1[3]==0xbf))
//    {
//     pwm_on--;
//     if(pwm_on <=pwm_default)pwm_on =pwm_default;
//     return; 
//    }
//
//   }
   if((buff1[2]==0x0b)&&(buff1[3]==0xfd)){if(pw_on==0)pw_on=0;else pw_on=pw_on-5;}        //up
   if((buff1[2]==0x0d)&&(buff1[3]==0xfd)){if(pw_on==pwm_total)pw_on=pwm_total;else pw_on=pw_on+5;}             //down
   if((buff1[2]==0x0f)&&(buff1[3]==0xbd)){;}        //left
   if((buff1[2]==0x0f)&&(buff1[3]==0x7d)){;}        //right
   if((buff1[2]==0x0e)&&(buff1[3]==0xfd)){onoff_enable=~onoff_enable;pw_on=pwm_default;}        //power
   if((buff1[2]==0x0f)&&(buff1[3]==0xdd)){;}        //cam1
   if((buff1[2]==0x0f)&&(buff1[3]==0xf9)){;}        //cam2
   #ifdef uart
 //  uart_send(buff1[0]);
 //  uart_send(buff1[1]);
   uart_send(buff1[2]);      //transfer by serial use 1ms every byte
   uart_send(buff1[3]);
//   uart_send(buff1[4]);
//   uart_send(buff1[5]);
   #endif

  }

 }
}