text1.lst

使用单片机串口输出

C51 COMPILER V7.07   TEXT1                                                                 03/21/2009 15:31:33 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE TEXT1
OBJECT MODULE PLACED IN Text1.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE Text1.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          //------------------------------------------------------
   2          
   3          #include <reg52.h>
   4          sbit   P26=P2^6;     //用P2^7控制CLR
   5          sbit   P20=P2^0;
   6          //----------------------------------------------------------------------
   7          //  函数名称：UART_init()
   8          //  功能说明：串口初始化，设定串口工作在方式0
   9          //----------------------------------------------------------------------
  10          void UART_init(void)
  11          {
  12   1      SCON = 0x00;              //没串行口方式0，允许发送，启动发送过程
  13   1      ES=0;                    // 禁止串口中断 
  14   1      }
  15          //---------------------------------------------------------------------
  16          //  函数名称：out()
  17          //  输入参数：data，需要从74LS164并行口输出的数据
  18          //  输出参数：无
  19          //  功能说明：发送八位串行数据至并口
  20          //---------------------------------------------------------------------
  21          void out(unsigned char a)
  22          {
  23   1        P26 =0;                   //并口输出清零
  24   1        P26 =1;                    //开始串行移位              
  25   1        SBUF=a;
  26   1        while(TI==0);             //循环等待
  27   1        TI=0;
  28   1      }
  29          
  30          void xianshi(unsigned int a)
  31          {
  32   1        int i;
  33   1        switch(a)
  34   1        {
  35   2         case 0:out(0x03);break;
  36   2         case 1:out(0x9f);break;
  37   2         case 2:out(0x25);break;
  38   2         case 3:out(0x0c);break;
  39   2         case 4:out(0x99);break;
  40   2         case 5:out(0x49);break;
  41   2         case 6:out(0x41);break;
  42   2         case 7:out(0x1f);break;
  43   2         case 8:out(0x01);break;
  44   2         case 9:out(0x09);break;
  45   2         case 0x0a:out(0x11);break;
  46   2         case 0x0b:out(0xb1);break;
  47   2         case 0x0c:out(0x63);break;
  48   2         case 0x0d:out(0x85);break;
  49   2         case 0x0e:out(0x61);break;
  50   2         case 0x0f:out(0x71);
  51   2        }
  52   1        for(i=0;i<1000;)
  53   1        {
  54   2         i++;
  55   2        }
C51 COMPILER V7.07   TEXT1                                                                 03/21/2009 15:31:33 PAGE 2   

  56   1      }
  57          void main(void)
  58          {
  59   1        UART_init();  
  60   1        while(1)
  61   1        {
  62   2        P20=0;
  63   2        P20=1;
  64   2        P2=0x00;
  65   2        xianshi(P0>>4);
  66   2        P2=0x04;
  67   2        xianshi(P0&0x0f);
  68   2        }
  69   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    201    ----
   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)