sys_init.lst

DS18B20多点测温

C51 COMPILER V8.02   SYS_INIT                                                              04/15/2009 18:08:21 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE SYS_INIT
OBJECT MODULE PLACED IN sys_init.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE sys_init.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<c8051f020.h>
   2          #define uint unsigned int
   3          
   4          void sys_init()
   5          {
   6   1              uint i;
   7   1              EA=0;                                         //关闭看门狗
   8   1              WDTCN=0xDE;
   9   1              WDTCN=0xAD;
  10   1              EA=1; 
  11   1              OSCXCN=0x67;                          //晶体振荡器方式
  12   1              for(i=0;i<256;i++);           //等待振荡器启振
  13   1              while(!(OSCXCN&0x80));        //等待晶体振荡器稳定
  14   1              OSCICN = 0x88;                //选择外部振荡器为系统时钟源并允许丢失时钟检测器          
  15   1              XBR0=0x00;                                        //作用？
  16   1              XBR1=0x00;
  17   1              XBR2=0x40;
  18   1              P0MDOUT=0x00;
  19   1              P2MDOUT=0xff;                 //高电平输出为推挽方式  
  20   1              P3MDOUT=0xff;
  21   1              P74OUT =0x0f;                             //P4-P7脚设为推挽 作为输出用  
  22   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     57    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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