configtimer23.lst

无线龙ZigBee模块CC1010的接收－发送程序。

C51 COMPILER V7.06   CONFIGTIMER23                                                         04/13/2005 12:55:51 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE CONFIGTIMER23
OBJECT MODULE PLACED IN ConfigTimer23.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ConfigTimer23.c OMF2 BROWSE INCDIR(..\..\..\..\Include;..\..\..\..\lib) DEF
                    -INE(FREQ433) DEBUG

stmt level    source

   1          /*****************************************************************************
   2           *                                                                           *
   3           *        **********                                                         *
   4           *       ************                                                        *
   5           *      ***        ***                                                       *
   6           *      ***   +++   ***                                                      *
   7           *      ***   + +   ***                                                      *
   8           *      ***   +                            CHIPCON CC1010                    *
   9           *      ***   + +   ***                 HAL - ConfigTimer23                  *
  10           *      ***   +++   ***                                                      *
  11           *      ***       ***                                                        *
  12           *       ***********                                                         *
  13           *        *********                                                          *
  14           *                                                                           *
  15           *****************************************************************************
  16           *                                                                           *
  17           *****************************************************************************
  18           * Author:              ROH                                                  *
  19           *****************************************************************************
  20           * Revision history:                                                         *
  21           *                                                                           *
  22           * $Log: ConfigTimer23.c,v $
  23           * Revision 1.1  2002/10/14 13:04:30  tos
  24           * Initial version in CVS.
  25           *
  26           *                                                                           *
  27           ****************************************************************************/
  28          
  29          #include <chipcon/hal.h>
  30          
  31          
  32          //----------------------------------------------------------------------------
  33          // ulong halConfigTimer23(...);
  34          //
  35          //  Description:
  36          //      This function configures timer 2 or 3 (depending on the value given in
  37          //      _option_ as either an interrupt timer (an interrupt is generated at
  38          //      certain intervals in time, as specified by _period) or a pulse width 
  39          //      modulator (PWM).
  40          //      If _period_ is specified as 0, then, in timer mode the timeout peiod will
  41          //      be set to the maximum possible, and in PWM mode the period will be
  42          //      set as long as possible. Using the PWM mode of timer 2/3 overrides the
  43          //      normal operation of ports P3.4/P3.5 and can thus not be used in conjunction
  44          //      with timer 0/1 configured as counters. The duty cycle is set to 50% (128/255)
  45          //      initially in PWM mode.
  46          //      The timer/PWM must be started with macro TIMERx_RUN(TRUE).
  47          //
  48          //  Arguments:
  49          //      byte options
  50          //          Options indicating which timer to configure and how. Different
  51          //          constants for _option_ is defined below.
  52          //      ulong period
  53          //          The desired period between interrupts in microseconds. In PWM mode
  54          //          the duty cycle will be set as close to 50% as possible. This duty
C51 COMPILER V7.06   CONFIGTIMER23                                                         04/13/2005 12:55:51 PAGE 2   

  55          //          cycle can be changed (in an ISR or at any other time) by using the
  56          //          appropriate PWMx_SET_DUTY_CYCLE(...) macro. If _period_
  57          //          is 0, then the maximum period possible will be set. The period can
  58          //          also be adjusted dynamically with the PWMx_SET_PERIOD(...) macro.
  59          //      word clkFreq
  60          //          The XOSC clock frequency in kHz.
  61          //
  62          //  Return value:
  63          //      ulong
  64          //          The actual period in microseconds or zero if the desired period is
  65          //          too high.
  66          //----------------------------------------------------------------------------
  67          ulong halConfigTimer23(byte options, ulong period, word clkFreq) {
  68   1          byte tx, txpre, mode;
  69   1          
  70   1          period = (period*clkFreq+127500)/255000;
  71   1          if (period)
  72   1              period--;
  73   1          mode=0;
  74   1          if (options&TIMER23_PWM) {
  75   2              // PWM mode selected
  76   2              if (period&0xFFFFFF00)     // >255
  77   2                  return 0;
  78   2              txpre=(byte)period;
  79   2              tx=128;
  80   2              mode=1;
  81   2          } else {
  82   2              // Timer mode selected        
  83   2              if (period&0xFFFF0000)      // >63535
  84   2                  return 0;
  85   2              txpre=(byte)((word)period>>8);
  86   2              tx=(byte)period;
  87   2          }
  88   1        
  89   1          if (options&TIMER3) {
  90   2              // Timer 3 selected
  91   2              if (options&TIMER23_INT_TIMER) {
  92   3                  EXIF&=~0x80;    // Clear interrupt flag
  93   3                  ET3=1;          // Enable timer interrupt
  94   3                  EA=1;           // Enable global interrupt
  95   3              }
  96   2              T3PRE=txpre;
  97   2              T3=tx;
  98   2              TCON2=(TCON2&~0x0C)|(mode<<2);
  99   2          } else {
 100   2              // Timer 2 selected
 101   2              if (options&TIMER23_INT_TIMER) {
 102   3                  EXIF&=~0x20;    // Clear interrupt flag
 103   3                  ET2=1;          // Enable timer interrupt
 104   3                  EA=1;           // Enable global interrupt
 105   3              }
 106   2              T2PRE=txpre;
 107   2              T2=tx;            
 108   2              TCON2=(TCON2&~0x03)|mode;
 109   2          }
 110   1          period=(period+1)*255000/clkFreq;
 111   1          return period;
 112   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    258    ----
C51 COMPILER V7.06   CONFIGTIMER23                                                         04/13/2005 12:55:51 PAGE 3   

   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       9
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
   EDATA SIZE       =   ----    ----
   HDATA SIZE       =   ----    ----
   XDATA CONST SIZE =   ----    ----
   FAR CONST SIZE   =   ----    ----
END OF MODULE INFORMATION.


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