sp0604_实验19_脉宽可调和显示的pwm信号.lst

基于AT89S52的pwm脉宽调制的C语言编程

C51 COMPILER V8.01   SP0604_实验19_耞宽可礯和显蔩的PWM信号                                 04/06/2006 23:14:24 PAGE 1   


C51 COMPILER V8.01, COMPILATION OF MODULE SP0604_实验19_耞宽可礯和显蔩的PWM信号
OBJECT MODULE PLACED IN SP0604_实验19_脉宽可调和显示的PWM信号.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE SP0604_实验19_脉宽可调和显示的PWM信号.c BROWSE DEBUG OBJECTEXTEND TABS(2)

line level    source

   1          #include <REGX51.H>
   2          
   3          
   4          
   5          #define KEY_ADD (P3 & 0x04)
   6          #define KEY_SUB (P3 & 0x08)
   7          
   8          
   9          
  10          #define PWM P1_0
  11          unsigned char PWM_High=50;
  12          unsigned char PWM_Count=0;
  13          
  14          
  15          void timer0(void) interrupt 1
  16          {
  17   1        if(PWM_Count<PWM_High)PWM=0;
  18   1          else PWM=1;
  19   1        PWM_Count++;
  20   1        if(PWM_Count==100)PWM_Count=0;
  21   1      }
  22          
  23          
  24          const unsigned char LEDDATA[]={0x3f,0x06,0x5b,0x4f,0x66,
  25                                         0x6d,0x7d,0x07,0x7f,0x6f,
  26                                         0x77,0x7c,0x39,0x5e,0x79,0x71,
  27                                        };
  28          //数码管扫描代码表
  29          unsigned char code LEDBITDATA[]=
  30          {
  31            0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,
  32          };
  33          
  34          #define LEDDATAPORT P0
  35          #define LEDBITPORT  P2
  36          unsigned char ScanLedCount;
  37          unsigned char LEDBuffer[2];
  38          
  39          void timer1(void) interrupt 3
  40          {
  41   1        TH1=(65536-2000)/256;
  42   1        TL1=(65536-2000)%256;
  43   1      
  44   1        LEDDATAPORT=LEDDATA[LEDBuffer[ScanLedCount]];
  45   1        LEDBITPORT =LEDBITDATA[ScanLedCount];
  46   1        ScanLedCount++;
  47   1        if(ScanLedCount==sizeof(LEDBuffer))ScanLedCount=0;  
  48   1      }
  49          
  50          
  51          
  52          void Delay(unsigned int t)
  53          {
  54   1        while(t)t--;
  55   1      }
C51 COMPILER V8.01   SP0604_实验19_耞宽可礯和显蔩的PWM信号                                 04/06/2006 23:14:24 PAGE 2   

  56          
  57          
  58          
  59          void main(void)
  60          {
  61   1        TMOD=0x12;
  62   1        TH0=256-184;
  63   1        TL0=TH0;
  64   1        TH1=(65536-2000)/256;
  65   1        TL1=(65536-2000)%256;
  66   1        TR0=1;
  67   1        TR1=1;
  68   1        ET0=1;
  69   1        ET1=1;
  70   1        EA=1;
  71   1      
  72   1        LEDBuffer[0]=PWM_High%10;
  73   1        LEDBuffer[1]=PWM_High/10;
  74   1        while(1)
  75   1          {
  76   2            if(KEY_ADD==0)
  77   2              {
  78   3                Delay(1000);
  79   3                if(KEY_ADD==0)
  80   3                  {
  81   4                    PWM_High--;
  82   4                    if(PWM_High==0)PWM_High=1;
  83   4                    LEDBuffer[0]=PWM_High%10;
  84   4                    LEDBuffer[1]=PWM_High/10;
  85   4                    while(KEY_ADD==0);
  86   4                  }
  87   3              }
  88   2      
  89   2            if(KEY_SUB==0)
  90   2              {
  91   3                Delay(1000);
  92   3                if(KEY_SUB==0)
  93   3                  {
  94   4                    PWM_High++;
  95   4                    if(PWM_High==100)PWM_High=99;
  96   4                    LEDBuffer[0]=PWM_High%10;
  97   4                    LEDBuffer[1]=PWM_High/10;
  98   4                    while(KEY_SUB==0);
  99   4                  }
 100   3              }
 101   2          }
 102   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    242    ----
   CONSTANT SIZE    =      8    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     21    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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