watchdogrtc.lst

矿工定位系统单端

C51 COMPILER V7.05   WATCHDOGRTC                                                           04/13/2004 13:35:28 PAGE 1   


C51 COMPILER V7.05, COMPILATION OF MODULE WATCHDOGRTC
OBJECT MODULE PLACED IN watchdogrtc.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE watchdogrtc.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          //watchdogrtc.c - code recommendation for C header file
   2          /***********************************************************************
   3          MODULE:    Watchdog and Real Time Clock Common Code
   4          VERSION:   1.00
   5          CONTAINS:  Routines for controlling the Watchdog and Real Time Clock/
   6                     System Timer common interrupt on the Philips P89LPC932
   7          COPYRIGHT: Embedded Systems Academy, Inc. - www.esacademy.com
   8          LICENSE:   May be freely used in commercial and non-commercial code
   9                     without royalties provided this copyright notice remains
  10                     in this file and unaltered
  11          WARNING:   IF THIS FILE IS REGENERATED BY CODE ARCHITECT ANY CHANGES
  12                     MADE WILL BE LOST. WHERE POSSIBLE USE ONLY CODE ARCHITECT
  13                     TO CHANGE THE CONTENTS OF THIS FILE
  14          GENERATED: On "Feb 24 2004" at "16:21:01" by Code Architect 2.03
  15          ***********************************************************************/
  16          
  17          // SFR description needs to be included
  18          #include<REG922.h>
  19          extern bit T_flag ;
  20          /***********************************************************************
  21          DESC:    Initializes and enables Watchdog and Real Time Clock interrupt
  22          RETURNS: Nothing
  23          CAUTION: Set EA to 1 to enable interrupts after calling
  24          ************************************************************************/
  25          void watchdogrtc_isrinit(void)
  26          {
  27   1        // set isr priority to 0
  28   1        IP0 &= 0xBF;
  29   1        IP0H &= 0xBF;
  30   1      
  31   1        // enable interrupt
  32   1        EWDRT = 1;
  33   1      }
  34          
  35          /***********************************************************************
  36          DESC:    Watchdog and Real Time Clock Interrupt Service Routine
  37          RETURNS: Nothing
  38          CAUTION: RTC or Watchdog initialization functions must be called and EA
  39                   must be set to 1 to enable interrupts
  40          ************************************************************************/
  41          void watchdogrtc_isr(void) interrupt 10 using 1
  42          {
  43   1        // check if interrupt caused by real time clock
  44   1        if (RTCCON & 0x80)
  45   1        {
  46   2          // clear RTCF interrupt flag
  47   2          RTCCON &= ~0x80;
  48   2              T_flag=1;
  49   2      
  50   2        }
  51   1        // check if interrupt caused by watchdog
  52   1        if (WDCON & 0x02)
  53   1        {
  54   2          // clear WDOTF interrupt flag
  55   2          WDCON &= ~0x02;
C51 COMPILER V7.05   WATCHDOGRTC                                                           04/13/2004 13:35:28 PAGE 2   

  56   2        }
  57   1      }
  58          
  59          
  60          
  61          /***********************************************************************
  62          DESC:    Initializes the watchdog as a Watchdog Timer
  63                   Uses Watchdog clock at 400kHz as a clock source
  64                   Resets the device if not fed within 998.888 ms
  65          RETURNS: Nothing
  66          ************************************************************************/
  67          void watchdog_init
  68            (
  69            void
  70            )
  71          {
  72   1        bit eacopy;
  73   1      
  74   1        // init reload value and prescaler
  75   1        // select Watchdog clock at 400kHz
  76   1        // start watchdog
  77   1        WDL = 0xC2;
  78   1        eacopy = EA;
  79   1        EA = 0;
  80   1        WDCON = 0xC5;
  81   1        WFEED1 = 0xA5;
  82   1        WFEED2 = 0x5A;
  83   1        EA = eacopy;
  84   1      
  85   1      }
  86          
  87          /***********************************************************************
  88          DESC:    Feeds the Watchdog to stop the device from resetting
  89          RETURNS: Nothing
  90          CAUTION: watchdog_init must be called first
  91          ************************************************************************/
  92          void watchdog_feed
  93            (
  94            void
  95            )
  96          {
  97   1        bit eacopy;
  98   1      
  99   1        // disable interrupts
 100   1        eacopy = EA;
 101   1        EA = 0;
 102   1        // feed the watchdog
 103   1        WFEED1 = 0xA5;
 104   1        WFEED2 = 0x5A;
 105   1        // restore interrupts
 106   1        EA = eacopy;
 107   1      }
 108          
 109          /***********************************************************************
 110          DESC:    Starts the Watchdog
 111          RETURNS: Nothing
 112          CAUTION: watchdog_init must be called first
 113          ************************************************************************/
 114          void watchdog_start
 115            (
 116            void
 117            )
C51 COMPILER V7.05   WATCHDOGRTC                                                           04/13/2004 13:35:28 PAGE 3   

 118          {
 119   1        bit eacopy;
 120   1      
 121   1        // disable interrupts
 122   1        eacopy = EA;
 123   1        EA = 0;
 124   1        // start the watchdog
 125   1        WDCON |= 0x04;
 126   1        // feed the watchdog
 127   1        WFEED1 = 0xA5;
 128   1        WFEED2 = 0x5A;
 129   1        // restore interrupts
 130   1        EA = eacopy;
 131   1      }
 132          
 133          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     92    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----       3
END OF MODULE INFORMATION.


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