txd.lst

proteus仿真实例大全

C51 COMPILER V6.12  TXD                                                                    01/25/2008 09:36:07 PAGE 1   


C51 COMPILER V6.12, COMPILATION OF MODULE TXD
OBJECT MODULE PLACED IN .\txd.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE .\txd.c DEBUG OBJECTEXTEND

stmt level    source

   1          #include <AT89X51.H>
   2          #define uchar unsigned char
   3          #define RXD P1_0
   4          #define TXD P1_1
   5          
   6          //计数器初始化
   7          void S2INI(void)
   8          {
   9   1          TMOD |=0x02;                //计数器0，方式2
  10   1          TH0=0xA0;                    //预值为256-96=140，十六进制A0
  11   1          TL0=TH0;        
  12   1          TR0=1;                        //开始计数
  13   1          TF0=0;
  14   1      }
  15          
  16          //查询计数器溢出标志位
  17          void WaitTF0( void )
  18          {
  19   1          while(!TF0);
  20   1          TF0=0;
  21   1      }
  22          
  23          void WByte(uchar input)
  24          {
  25   1          //发送启始位
  26   1          uchar i=8;
  27   1          TR0=1;
  28   1          TXD=(bit)0;
  29   1          WaitTF0();
  30   1          //发送8位数据位
  31   1          while(i--)
  32   1          {
  33   2              TXD=(bit)(input&0x01);     //先传低位
  34   2              WaitTF0();
  35   2              input=input>>1;
  36   2          }
  37   1          //发送校验位(无)
  38   1          //发送结束位
  39   1          TXD=(bit)1;
  40   1          WaitTF0();
  41   1          TR0=0;
  42   1      }    
  43          void delay()
  44          {
  45   1       uchar i,j,k;
  46   1       for(i=100;i>0;i--)
  47   1       for(j=20;j>0;j--)
  48   1       for(k=248;k>0;k--);
  49   1      }
  50          void main(void)
  51          {
  52   1       S2INI();
  53   1       while(1)
  54   1       {
  55   2         WByte(0x7f);
C51 COMPILER V6.12  TXD                                                                    01/25/2008 09:36:07 PAGE 2   

  56   2         delay();
  57   2         WByte(0xff);
  58   2      	delay();
  59   2       }
  60   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     90    ----
   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)