#include <reg51.H>
unsigned char code dispbit[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; //位碼
unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66, 0x3F,/*0*/
                               0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40};
unsigned char dispbuf[8]={0,0,0,0,0,0,10,10};
unsigned char temp[8];
unsigned char dispcount;
unsigned char T0count;
unsigned char timecount;
bit flag;
unsigned long x;

void main(void)                           //主函數(shù)
{
  unsigned char i;
  TMOD=0x15;                              //T0T1方式1，T0計數(shù)
  TH0=0;
  TL0=0;
  TH1=(65536-4000)/256;
  TL1=(65536-4000)%256;
  TR1=1;                                  //啟動定時器1
  TR0=1;                                  //啟動定時器0
  ET0=1;                                  //允許定時器0中斷
  ET1=1;                                  //允許定時器1中斷
  EA=1;                                   //啟動總中斷
  while(1)
   {
      if(flag==1)
       {
         flag=0;
         x=T0count*65536+TH0*256+TL0;
         for(i=0;i<8;i++)
           {
             temp=0;
           }
         i=0;
         while(x/10)
           {
             temp=x%10;
             x=x/10;
             i++;
           }
         temp=x;
         for(i=0;i<6;i++)
           {
             dispbuf=temp;
           }
         timecount=0;
         T0count=0;
         TH0=0;
         TL0=0;
         TR0=1;
       }
   }
}

void t0(void) interrupt 1 using 0       //中斷1次計數(shù)值為65536
{
  T0count++;
}
void t1(void) interrupt 3 using 0        //每4ms中斷1次
{
  TH1=(65536-4000)/256;
  TL1=(65536-4000)%256;
  timecount++;                           //中斷250次即1s采集一次數(shù)據(jù)
  if(timecount==250)
    {
      TR0=0;
      timecount=0;
      flag=1;
    }                                     //中斷250次即1s采集一次數(shù)據(jù)
  P0=dispcode[dispbuf[dispcount]];        //P0口段輸出
  P2=dispbit[dispcount];                  //P2口位輸出
  dispcount++;
  if(dispcount==8)
    {
      dispcount=0;
    }
}

小弟初學單片機C，很多都不懂，哪位大哥大姐能幫我分析一下這個程序，寫出其流程圖

下面是圖