凌阳SPCE061A的数字频率计程序，请指教小妹

 汇编文件：

.include hardware.inc
  
   .code
   .public _main
   _main:
       call init_io
       call init_timer
       call init_zhongduan
   LOOP:
        r1=1
        [P_Watchdog_Clear]=r1
        jmp LOOP
  
  init_io: .proc
   PUSH r1,r5 to [sp]
   r1=0xff00
   [P_IOA_Dir]=r1
   [P_IOA_Attrib]=r1
   r1=0x0
   [P_IOA_Data]=r1
   r1=0xf804
   [P_IOB_Dir]=r1
   r1=0xf800
   [P_IOB_Attrib]=r1
   r1=0x0000
   [P_IOB_Data]=r1
   POP r1,r5 from [sp]
   retf
   .endp
 
 init_timer: .proc
    PUSH r1,r5 to [sp]
    r1=0x0015
    [P_TimerA_Ctrl]=r1
    r1=0xffff-(256*1)
    [P_TimerA_Data]=r1
    r1=0x0007
    [P_TimerB_Ctrl]=r1
    r1=0
    [P_TimerB_Data]=r1
    POP r1,r5 from [sp]
   retf
   .endp
  
 init_zhongduan: .proc
    PUSH r1,r5 to [sp]
    r1=0x1000
    [P_INT_Ctrl]=r1
    IRQ ON
    POP r1,r5 from [sp]
   retf
   .endp

C文件：

 #include  <SPCE061V004.H>
  
  unsigned int zixingma[]={0x3f00,0x0600,0x5b00,0x4f00,0x6600,0x6d00,0x7d00,0x0700,0x7f00,0x6f00};
  unsigned int weima[]={0x8000,0x4000,0x2000,0x1000,0x0800};
  unsigned int pinl,a,b,c,d,e;
  unsigned int i=0;
  void delay()
  { while(i<800)
    { i++;
    }
  }
 void xingwei(int x,int y)
  { *P_IOA_Data=x;
    *P_IOB_Data=y;
   
  }
 
 void IRQ1() __attribute__((ISR));
 void IRQ1()
 {
  asm("IRQ OFF");
  *P_TimerB_Ctrl=0x0006;
  pinl=*P_TimerB_Data;
  
 
  a=pinl/10000;
  b=pinl/1000%10;
  c=pinl/100%10;
  d=pinl%100/10;
  e=pinl%100%10;
  while(1)
  {
     xingwei(zixingma[a],weima[0]);
     delay();
     xingwei(zixingma[b],weima[1]);
     delay();
     xingwei(zixingma[c],weima[2]);
     delay();
     xingwei(zixingma[d],weima[3]);
     delay();
     xingwei(zixingma[e],weima[4]);
     delay();
   }
 
  *P_INT_Clear=0x1000;
  asm("IRQ ON");
  }