text1.lst

单片机快速入门原程序

C51 COMPILER V7.50   TEXT1                                                                 06/03/2006 17:10:53 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE TEXT1
OBJECT MODULE PLACED IN Text1.OBJ
COMPILER INVOKED BY: e:\Keil\C51\BIN\C51.EXE Text1.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg51.h>
   2          #include<stdio.h>
   3          sbit P10 = 0x90;
   4          void uart_transmit(char ByteToBeSend);
   5          xdata unsigned char TxByte=0;/*要发送的字节数据*/
   6          unsigned char nTxIndex=0;/*发送单个字符的位指针*/
   7          bit  nTxNextBit=0;/* 单个字符数据位*/
   8          bit UartBusy=0;
   9          main()
  10          {       
  11   1              TMOD=0x01;      /* 定时器0工作在方式1 */
  12   1              EA=1;           /* 全局中断允许 */
  13   1              uart_transmit(0xAA);
  14   1              while(1)
  15   1      if(UartBusy==0) uart_transmit(0xAA);
  16   1      }
  17          void uart_transmit(char ByteToBeSend)
  18          {       TxByte=ByteToBeSend;
  19   1              TH0=0xFF;       
  20   1              TL0=0x97;       /* 写入计数初值到TL0 */
  21   1              TR0=1;          /* 定时器0准备开始 */
  22   1              P10=0;          /* 产生起始位*/
  23   1              TF0=0;          /* 定时器0中断标志位清0 */
  24   1              ET0=1;          /* 定时器0中断允许*/
  25   1              UartBusy=1;
  26   1              nTxNextBit=(TxByte>>nTxIndex)&0x01;
  27   1              //计算出下一位
  28   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     58    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =      1    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      2    ----
END OF MODULE INFORMATION.


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