11.lst

STC的PWM应用请大家使用

C51 COMPILER V8.02   11                                                                    07/10/2008 15:36:27 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE 11
OBJECT MODULE PLACED IN 11.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 11.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg52.h> 
   2          sfr   CCON   = 0xD8; 
   3          sfr   CMOD   = 0xD9; 
   4          sfr   CL     = 0xE9; 
   5          sfr   CH     = 0xF9; 
   6          sfr   CCAP0L = 0xEA; 
   7          sfr   CCAP0H = 0xFA; 
   8          sfr   CCAPM0 = 0xDA; 
   9          sfr   CCAPM1 = 0xDB; 
  10          #define uint  unsigned int
  11          #define uchar unsigned char
  12          uchar whith_p=50;
  13          uchar max_p=255;
  14          uchar min_p=1;
  15          uint fre = 0xffff;
  16          sbit  CR   = 0xDE; 
  17          sbit  led   = P2^0; 
  18          void timer0_int (void) interrupt 1 using 1
  19          {
  20   1       TH0 = fre >> 8;
  21   1       TL0 = fre & 0xff;
  22   1       led = ~led;
  23   1      } 
  24          void timer0_init(void)
  25          {   
  26   1       TMOD &= 0xf0; 
  27   1      TMOD |= 0x1;
  28   1      TH0 = 0xff;   
  29   1      TL0 = 0xff;
  30   1      TR0 = 1;
  31   1      ET0 = 1; 
  32   1      } 
  33          
  34          void pwm_init(void)
  35          {
  36   1          CMOD = 0x4;  
  37   1          CL = 0x0;
  38   1          CH = 0x0;
  39   1          CCAP0H = whith_p;   
  40   1          CCAPM0 = 0x42;  
  41   1          CR = 1;   
  42   1      } 
  43          
  44          void soft_delay(uint _1ms)
  45          {
  46   1       unsigned int tmp;
  47   1       while(_1ms--!=0) {
  48   2        for(tmp=0;tmp<144;tmp++);
  49   2       }
  50   1      }
  51          void pwm_out(void)
  52          {
  53   1           whith_p=50;
  54   1           while(whith_p<max_p)
  55   1               { CCAP0H =whith_p;
C51 COMPILER V8.02   11                                                                    07/10/2008 15:36:27 PAGE 2   

  56   2               soft_delay(10);
  57   2          whith_p=whith_p+5;
  58   2          CCAP0H = whith_p;
  59   2               soft_delay(10);
  60   2              }
  61   1        
  62   1             whith_p=max_p; 
  63   1            while(min_p<whith_p)
  64   1                  { CCAP0H = whith_p;
  65   2                   soft_delay(10);
  66   2                  whith_p=whith_p-5;
  67   2                  CCAP0H = whith_p;
  68   2                   soft_delay(10);
  69   2                       }
  70   1                       
  71   1      }
  72          
  73          void main (void)
  74          {
  75   1       pwm_init();
  76   1       timer0_init(); 
  77   1       EA = 1; 
  78   1       while(1){
  79   2        pwm_out();   
  80   2       }
  81   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    149    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      5    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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