1 // *********************************************************************
    2 //   Custom DPA Handler code example - Shows autobonding after reset   *
    3 // *********************************************************************
    4 // Copyright (c) MICRORISC s.r.o.
    5 //
    6 // File:    $RCSfile: CustomDpaHandler-Autobond.c,v $
    7 // Version: $Revision: 1.42 $
    8 // Date:    $Date: 2022/02/25 09:41:25 $
    9 //
   10 // Revision history:
   11 //   2022/02/24  Release for DPA 4.17
   12 //   2019/06/03  Release for DPA 4.02
   13 //   2018/10/25  Release for DPA 3.03
   14 //   2017/03/13  Release for DPA 3.00
   15 //   2015/08/05  Release for DPA 2.20
   16 //   2014/10/31  Release for DPA 2.10
   17 //   2014/04/30  Release for DPA 2.00
   18 //
   19 // *********************************************************************
   20 
   21 // Online DPA documentation https://doc.iqrf.org/DpaTechGuide/
   22 
   23 // Default IQRF include (modify the path according to your setup)
   24 #include "IQRF.h"
   25 
   26 // Default DPA header (modify the path according to your setup)
   27 #include "DPA.h"
   28 // Default Custom DPA Handler header (modify the path according to your setup)
   29 #include "DPAcustomHandler.h"
   30 
   31 // If the node is not bonded, then it tries to bond itself while paying attention not to cause RF collision with other nodes/coordinator
   32 
   33 // Must be the 1st defined function in the source code in order to be placed at the correct FLASH location!
   34 //############################################################################################
   35 bit CustomDpaHandler()
   36 //############################################################################################
   37 {
   38   // Handler presence mark
   39   clrwdt();
   40 
   41   // Detect DPA event to handle
   42   switch ( GetDpaEvent() )
   43   {
   44     // -------------------------------------------------
   45     case DpaEvent_Interrupt:
   46       // Do an extra quick background interrupt work
   47       // ! The time spent handling this event is critical.If there is no interrupt to handle return immediately otherwise keep the code as fast as possible.
   48       // ! Make sure the event is the 1st case in the main switch statement at the handler routine.This ensures that the event is handled as the 1st one.
   49       // ! It is desirable that this event is handled with immediate return even if it is not used by the custom handler because the Interrupt event is raised on every MCU interrupt and the “empty” return handler ensures the shortest possible interrupt routine response time.
   50       // ! Only global variables or local ones marked by static keyword can be used to allow reentrancy.
   51       // ! Make sure race condition does not occur when accessing those variables at other places.
   52       // ! Make sure( inspect.lst file generated by C compiler ) compiler does not create any hidden temporary local variable( occurs when using division, multiplication or bit shifts ) at the event handler code.The name of such variable is usually Cnumbercnt.
   53       // ! Do not call any OS functions except setINDFx().
   54       // ! Do not use any OS variables especially for writing access.
   55       // ! All above rules apply also to any other function being called from the event handler code, although calling any function from Interrupt event is not recommended because of additional MCU stack usage.
   56 
   57 DpaHandleReturnTRUE:
   58       return TRUE;
   59 
   60       // -------------------------------------------------
   61     case DpaEvent_Reset:
   62       // Called after module is reset
   63 
   64       // Do default unbonding procedure but override bonding one
   65       if ( !amIBonded() )
   66       {
   67         // Indicate start of the bonding by a few rapid LEDG pulses lasting 2s
   68         pulsingLEDG();
   69         waitDelay( 200 );
   70         stopLEDG();
   71 
   72         // Gap size doubles with every attempt to run bonding
   73         uns8 gapSize = 1;
   74         for ( ;; )
   75         {
   76           // Wait random time
   77           waitMS( _DpaApiRandom() );
   78           // Indicate the bonding attempt by LEDG
   79           pulseLEDG();
   80 
   81           // There must be a long no-network traffic interval to try bonding (listen before talk algorithm)
   82           uns8 loop = 200;
   83           do
   84           {
   85             _DpaApiRandom();
   86             waitMS( 1 );
   87             // Check RFIC
   88             if ( wasRFICrestarted() )
   89               DpaApiSetRfDefaults();
   90           } while ( !checkRF( 20 ) && --loop != 0 );
   91 
   92           // Was there no traffic?
   93           if ( loop == 0 )
   94           {
   95             // Yes, indicate bonding attempt by LEDR
   96             pulseLEDR();
   97 
   98             // Bonding using 3 service channels
   99             _3CHTX = TRUE;
  100             bondRequestAdvanced();
  101           }
  102 
  103           // Are we bonded?
  104           if ( amIBonded() )
  105           {
  106             // Optionally get the user data
  107             //copyMemoryBlock( hostUserDataReceived, PeripheralRam, sizeof( hostUserDataReceived ) );
  108             // Yes, do a long LEDG pulse
  109             setLEDG();
  110             waitDelay( 25 );
  111             stopLEDG();
  112             // and return
  113             goto DpaHandleReturnTRUE;
  114           }
  115 
  116           // Randomly wait for the next attempt to bond
  117           loop = gapSize;
  118           uns8 rndTime = ( _DpaApiRandom() & 0b11111 ) + 10;
  119           do
  120           {
  121             waitMS( rndTime );
  122           } while ( --loop != 0 );
  123 
  124           // Next gap size
  125           gapSize <<= 1;
  126           gapSize |= 1;
  127         }
  128       }
  129 
  130       break;
  131   }
  132 
  133   return FALSE;
  134 }
  135 
  136 //############################################################################################
  137 // Default Custom DPA Handler header; 2nd include implementing a Code bumper to detect too long code of the Custom DPA Handler (modify the path according to your setup)
  138 #include "DPAcustomHandler.h"
  139 //############################################################################################