main.lst

AT89C52扩展ram

C51 COMPILER V6.12  MAIN                                                                   10/19/2005 23:57:56 PAGE 1   


C51 COMPILER V6.12, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN .\main.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE .\main.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include<reg52.h>
   2          #include<absacc.h>
   3          #include<intrins.h>	 
   4          #define uchar unsigned char
   5          #define uint unsigned int
   6          uchar xdata *p;		
   7          void write();
   8          void read();
   9          void delay();
  10          
  11          void main()
  12          {
  13   1      
  14   1      P1=0xaa;
  15   1       write();
  16   1       P1=0xbb;
  17   1       while(1)
  18   1       read();
  19   1      }
  20          
  21          void write()		 
  22          {
  23   1       unsigned char j;//飘零：此处不能用int变量因为写入ram的只能是八位
  24   1       p=0x0000;	          
  25   1       for(j=0;j<255;j++)//飘零：此处不能等于255否则无法判断
  26   1        {*p=j+10;			  
  27   2         //delay();
  28   2         _nop_();
  29   2         _nop_();
  30   2         p++;
  31   2         }
  32   1      }
  33          
  34          void read()		
  35          {
  36   1       unsigned char k;//飘零：此处不能用int变量，与上相同
  37   1       p=0x0000;
  38   1        for(k=0;k<255;k++)//飘零：此处不能等于255，与上相同
  39   1      	{
  40   2      	 P1=*p;
  41   2      	 delay();
  42   2      	 p++;
  43   2      	
  44   2      	}
  45   1      }
  46          
  47          void delay()
  48          {uint i;
  49   1       for(i=6000;i>0;i--);//int类型变量不能大于65536
  50   1      for(i=6000;i>0;i--);
  51   1      for(i=6000;i>0;i--);
  52   1      for(i=6000;i>0;i--);
  53   1      }


C51 COMPILER V6.12  MAIN                                                                   10/19/2005 23:57:56 PAGE 2   

MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    135    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      2       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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