C51 COMPILER V7.05   WXRAMB                                                                02/13/2006 11:25:07 PAGE 1   


C51 COMPILER V7.05, COMPILATION OF MODULE WXRAMB
OBJECT MODULE PLACED IN WXRAMB.OBJ
COMPILER INVOKED BY: C:\SiLabs\MCU\IDEfiles\C51\BIN\C51.exe WXRAMB.C DB OE

stmt level    source

   1          //參考程序B://WXRAMB.C   程序對片內數據存儲器(4K RAM)實現讀/寫操作，先在地址//0000---00FFH寫入數據，再讀出
             -進行比較是否正確,若不正確蜂鳴器響一聲
   2          #include <c8051f020.h>                    // SFR declarations
   3          #include <intrins.h>
   4          sbit BUZ = P3^5 ;                         // P3^5位管理蜂鳴器
   5          unsigned char xdata *point;
   6          void PORT_Init (void);
   7          void sleep_ms(unsigned char count)       //延時
   8          {
   9   1        unsigned char ii,jj;
  10   1        for(ii=0;ii<count;ii++)
  11   1          {
  12   2            for(jj=0;jj<250;jj++)
  13   2                _nop_();                      
  14   2          }   
  15   1      }
  16          void main (void)        //主程序
  17           {
  18   1              unsigned char WrData,RdData;
  19   1              unsigned int k;
  20   1              WDTCN = 0xde;           /*無效看門狗*/
  21   1              WDTCN = 0xad;
  22   1                      PORT_Init();                    /*初始化端口*/
  23   1              WrData=0x0;                             /*寫入數據從0開始*/
  24   1          point=0x0000;                           /*地址指針從0000開始*/
  25   1              for(k=0;k<0x100;k++)            /*寫16個數據*/
  26   1          {
  27   2                      *point=WrData;              /*寫數據到片內數據存儲器(4K RAM)*/
  28   2                      point++;
  29   2                      WrData++;
  30   2              }
  31   1              WrData=0x0;
  32   1              point=0x0000;
  33   1              for(k=0;k<0x10;k++)             /*讀出比較*/
  34   1          {
  35   2                      RdData=*point;          /*讀數據*/
  36   2                      if(RdData!=WrData){     /*是否出錯*/
  37   3                              BUZ = 0;                /*蜂鳴器響*/
  38   3                              sleep_ms(250);
  39   3                              BUZ = 1;                /*蜂鳴器滅*/
  40   3                      }
  41   2                      _nop_();
  42   2                  WrData++;
  43   2                      point++;
  44   2                      _nop_();
  45   2              }
  46   1              _nop_();
  47   1      }
  48          
  49          void PORT_Init (void)
  50          {
  51   1      XBR2    = 0x40;      /*使能交叉開關和弱上拉*/
  52   1      EMI0CF |= 0x20; /*只用片內數據存儲器，ALE高/低脈寬占1個SYSCLK周期*/
  53   1      EMI0TC |= 0x6c;/*地址建立/保持時間占0個SYSCLK周期/WR和/RD占12個SYSCLK周期*/
  54   1      P3MDOUT |= 0x20;     /*使能P3.5推挽輸出*/
C51 COMPILER V7.05   WXRAMB                                                                02/13/2006 11:25:07 PAGE 2   

  55   1      }
  56          
  57          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    129    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      2    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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