text1.lst

利用延时产生pwm信号

C51 COMPILER V8.02   TEXT1                                                                 03/04/2009 20:36:33 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE TEXT1
OBJECT MODULE PLACED IN Text1.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE Text1.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1                                            #include <reg51.h>  // 引用头文件，里面包含了一些对51单片机内部寄存器的定义
   2          #define uchar unsigned char  //定义unsigned int为uint
   3          #define uint unsigned int  //定义unsigned uchar为uchar
   4          
   5          
   6           
   7          sbit en2= P3^0;  //PWM信号输出 
   8          sbit IN3= P3^1;  //方向控制
   9          sbit IN4= P3^4;  //方向控制
  10          
  11          
  12          void delay_ms(uint s)   //延时
  13          {
  14   1          uint x;
  15   1              for(s;s>0;s--)
  16   1          {
  17   2              x = 200;
  18   2              while(x--);
  19   2          }
  20   1      }
  21           //**********************
  22                  OutputPWM()   
  23          {  
  24   1         
  25   1            en2=!en2; 
  26   1            delay_ms(3);
  27   1            en2=!en2; 
  28   1            delay_ms(2);
  29   1            
  30   1      }
  31          //========= 主函数 ============
  32          void main()
  33          {
  34   1               en2=0;  //输出端置1
  35   1           IN3=1;
  36   1           IN4=0;
  37   1              while(1)  //主循环
  38   1              {
  39   2                      OutputPWM();
  40   2              }
  41   1      }  


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     60    ----
   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)