ex4-9.lst

< 嵌入式C语言程序设计>>一书的源代码

C51 COMPILER V8.02   EX4_9                                                                 09/12/2007 22:06:41 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE EX4_9
OBJECT MODULE PLACED IN ex4-9.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE ex4-9.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <REGX51.H>
   2          #define TIMER0_COUNT 0xEE11 /* 10000h-((12,000,000/(12*200))*/
   3          code seven_seg[16]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,
   4                             0X90,0X88,0X83,0XC6,0XA1,0X86,0X8E};
   5          code scan[4]={0X0E,0X0D,0X0B,0X07};
   6          unsigned char counter[4]={0,0,0,0};
   7          unsigned char timer0_tick,k=0;
   8          extern char keyscan();
   9          static void timer0_isr(void) interrupt TF0_VECTOR using 1
  10          {
  11   1        TR0=0;
  12   1        TL0=(TIMER0_COUNT & 0x00FF);
  13   1        TH0=(TIMER0_COUNT >> 8);
  14   1        TR0=1;
  15   1      //  P1=seven_seg[counter[k]];
  16   1      //  P0=scan[k];
  17   1        k++;
  18   1        if(k==4) k=0;
  19   1        timer0_tick++;
  20   1        if (timer0_tick==200) timer0_tick=0;
  21   1      }
  22          static void timer0_initialize(void)
  23          {
  24   1        EA=0;
  25   1        timer0_tick=0;
  26   1        TR0=0;
  27   1        TMOD &= 0XF0;
  28   1        TMOD |=0x01;
  29   1        TL0=(TIMER0_COUNT & 0x00FF);
  30   1        TH0=(TIMER0_COUNT >> 8);
  31   1        PT0=0;
  32   1        ET0=1;
  33   1        TR0=1;
  34   1        EA=1;
  35   1      }
  36          void main (void)  
  37          {
  38   1        unsigned char c=0;
  39   1        char ch;
  40   1        timer0_initialize();
  41   1        while(1)
  42   1        {
  43   2           ch=keyscan();
  44   2               P2&=ch;
  45   2        }
  46   1       /* do {
  47   1          ch=gotkey();
  48   1          for(c=3;c>0;c--)
  49   1              counter[c]=counter[c-1];
  50   1              counter[0]=ch;
  51   1          } while(1);   */
  52   1      }
  53          


C51 COMPILER V8.02   EX4_9                                                                 09/12/2007 22:06:41 PAGE 2   

MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     81    ----
   CONSTANT SIZE    =     40    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      6       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)