pwmmain.lst

这里是LPC系统的PWM发生程序

C51 COMPILER V6.14h  PWMMAIN                                                               07/27/2001 03:54:39 PAGE 1   


C51 COMPILER V6.14h, COMPILATION OF MODULE PWMMAIN
OBJECT MODULE PLACED IN pwmMain.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE pwmMain.c DEBUG OBJECTEXTEND

stmt level    source

   1          /*------------------------------------------------------------------------------
   2          pwmMain.c : Sample Program that demonstrates the pulse width modulator for the
   3          following microcontrollers
   4          
   5          Philips 87LPC768
   6          
   7          Copyright (c) 1988-2001 Keil Elektronik GmbH and Keil Software, Inc.
   8          All rights reserved.
   9          --------------------------------------------------------------------------*/
  10          
  11          sfr P0    = 0x80;
  12          sfr P1    = 0x90;
  13          sfr P0M1    = 0x84;
  14          sfr P0M2    = 0x85;
  15          sfr P1M1    = 0x91;
  16          sfr P1M2    = 0x92;
  17          
  18          sfr CNSW0   = 0xD1;
  19          sfr CNSW1   = 0xD2;
  20          sfr CPSW0   = 0xD3;
  21          sfr CPSW1   = 0xD4;
  22          sfr CPSW2   = 0xD5;
  23          sfr CPSW3   = 0xD6;
  24          sfr CPSW4   = 0xD7;
  25          sfr PWMCON0 = 0xDA;
  26          sfr PWMCON1 = 0xDB;
  27          
  28          
  29          
  30          /*------------------------------------------------------------------------------
  31          main() : Runs a while loop as the PWM automatically loops 
  32          ------------------------------------------------------------------------------*/
  33          void main( void )
  34          {
  35   1      	CNSW0 = 0xFF;					//PWM Clock Count set to Maximum. 
  36   1      	CNSW1 = 0X03;
  37   1      
  38   1      	CPSW0 = 0xCC;					//Setting duty cycle of channel 0 to 80%
  39   1      	CPSW1 = 0x98;					//Setting duty cycle of channel 1 to 60%
  40   1      	CPSW2 = 0x64;					//Setting duty cycle of channel 2 to 40%	
  41   1      	CPSW3 = 0x30;					//Setting duty cycle of channel 3 to 20%
  42   1      	
  43   1      	CPSW4 = 0xE4;					//Setting 8-9 bits of output registers
  44   1      	
  45   1      	PWMCON0 |= 0x40;				//Setting all channels to non-iverted.
  46   1      	
  47   1      	PWMCON1 &= 0x00;				//Braking disabled  Shadow Memory transfered.
  48   1      
  49   1      	PWMCON0 |= 0x80;				//RUN.
  50   1      
  51   1      	while(1);
  52   1      
  53   1      }


C51 COMPILER V6.14h  PWMMAIN                                                               07/27/2001 03:54:39 PAGE 2   

MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     32    ----
   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)