bit.lst

示例程序下载关于单片机接上

C51 COMPILER V7.01  BIT                                                                    11/06/2003 21:34:54 PAGE 1   


C51 COMPILER V7.01, COMPILATION OF MODULE BIT
OBJECT MODULE PLACED IN bit.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE bit.c BROWSE DEBUG OBJECTEXTEND TABS(2)

stmt level    source

   1          #include <at89x51.h>
   2          void main(void)
   3          {
   4   1        unsigned int a;
   5   1        unsigned int b;
   6   1        unsigned char temp; //临时变量
   7   1        P1 = 0xAA; //点亮D1,D3,D5,D7 P1口的二进制为10101010,为0时点亮LED
   8   1        for (a=0;a<1000;a++)
   9   1          for (b=0;b<1000;b++); //延时
  10   1        temp = P1 & 0x7; //单纯的写P1|0x7是没有意义的，因为没有变量被影响，不会被编译
  11   1        //执行P1｜0x7后结果存入temp，这时改变的是temp，但P1不会被影响。
  12   1        //这时LED没有变化，仍然是D1,D3,D5,D7亮
  13   1        for (a=0;a<1000;a++)
  14   1          for (b=0;b<1000;b++); //延时
  15   1        P1 = 0xFF; //熄灭LED
  16   1        for (a=0;a<1000;a++)
  17   1          for (b=0;b<1000;b++); //延时
  18   1        P1 = 0xAA; //点亮D1,D3,D5,D7 P1口的二进制为10101010,为0时点亮LED
  19   1        for (a=0;a<1000;a++)
  20   1          for (b=0;b<1000;b++); //延时
  21   1        P1 = P1 & 0x7; //这时LED会变得只有D2灭
  22   1      //因为之前P1=0xAA=10101010
  23   1      //与0x7位与   0x7=00000111
  24   1      //结果存入P1   P1=00000010 //位为O时点亮LED，电路看第三课
  25   1        for (a=0;a<1000;a++)
  26   1          for (b=0;b<1000;b++); //延时
  27   1        P1 = 0xFF; //熄灭LED
  28   1        while(1);
  29   1        //大家可以根据上面的程序去做位或，左移，取反等等。
  30   1      }
  31          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    163    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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