1 // ****************************************************************************
    2 //   Custom DPA Handler code example - Sending asynchronous request from Node *
    3 // ****************************************************************************
    4 // Copyright (c) MICRORISC s.r.o.
    5 //
    6 // File:    $RCSfile: CustomDpaHandler-AsyncRequest.c,v $
    7 // Version: $Revision: 1.35 $
    8 // Date:    $Date: 2021/04/26 15:13:50 $
    9 //
   10 // Revision history:
   11 //   2020/01/09  Release for DPA 4.12
   12 //   2017/03/13  Release for DPA 3.00
   13 //   2015/08/05  Release for DPA 2.20
   14 //   2014/10/31  Release for DPA 2.10
   15 //   2014/04/30  Release for DPA 2.00
   16 //
   17 // ****************************************************************************
   18 
   19 // Online DPA documentation https://doc.iqrf.org/DpaTechGuide/
   20 
   21 // Default IQRF include (modify the path according to your setup)
   22 #include "IQRF.h"
   23 
   24 // Uncomment to implement Custom DPA Handler for Coordinator (actually not needed as we do not used EEPROMs)
   25 //#define COORDINATOR_CUSTOM_HANDLER
   26 
   27 // Default DPA header (modify the path according to your setup)
   28 #include "DPA.h"
   29 // Default Custom DPA Handler header (modify the path according to your setup)
   30 #include "DPAcustomHandler.h"
   31 
   32 // This example shows how to send asynchronous request from Node to the Coordinator or its master device.
   33 // ! Please do not forget to set an API variable AsyncReqAtCoordinator at Coordinator to allow an asynchronous request execution there.
   34 
   35 // Must be the 1st defined function in the source code in order to be placed at the correct FLASH location!
   36 //############################################################################################
   37 bit CustomDpaHandler()
   38 //############################################################################################
   39 {
   40   // Handler presence mark
   41   clrwdt();
   42 
   43   // Packet ID
   44   static uns8 pid;
   45 
   46   // Detect DPA event to handle
   47   switch ( GetDpaEvent() )
   48   {
   49 #ifdef DpaEvent_Interrupt
   50     // -------------------------------------------------
   51     case DpaEvent_Interrupt:
   52       // Do an extra quick background interrupt work
   53       // ! 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.
   54       // ! 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.
   55       // ! 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.
   56       // ! Only global variables or local ones marked by static keyword can be used to allow reentrancy.
   57       // ! Make sure race condition does not occur when accessing those variables at other places.
   58       // ! 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.
   59       // ! Do not call any OS functions except setINDFx().
   60       // ! Do not use any OS variables especially for writing access.
   61       // ! 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.
   62 
   63       return TRUE;
   64 #endif
   65 
   66       // -------------------------------------------------
   67     case DpaEvent_Idle:
   68     {
   69       // Do a background work when RF packet is not received
   70       uns16 btnCnt = 1000 + 1;
   71       while ( buttonPressed && --btnCnt != 0 )
   72         waitMS( 1 );
   73 
   74       // Button was pressed for at least the 100 ms
   75       if ( btnCnt < 1000 - 100 )
   76       {
   77         // Packet ID
   78         PID = ++pid;
   79         // Number of hops = my VRN
   80         RTHOPS = ntwVRN;
   81         // Fake the last sender in case there was no communication at all from the network before
   82         bank0 uns8 lastTX @ usedBank0[0x13];
   83         lastTX = ntwVRN;
   84 
   85         // No DPA Params used
   86         _DpaParams = 0;
   87 
   88         // Data is sent to the Coordinator
   89         if ( btnCnt == 0 )
   90         {
   91           // To the coordinator master if button pressed > 0.5s
   92           _NADR = COORDINATOR_ADDRESS;
   93           pulseLEDR();
   94         }
   95         else
   96         {
   97           // Otherwise to coordinator the local device
   98           _NADR = LOCAL_ADDRESS;
   99           pulseLEDG();
  100         }
  101         _NADRhigh = 0;
  102 
  103         // Use IO peripheral to work with LEDs even if LED peripherals are not present
  104         _PNUM = PNUM_IO;
  105         // Make a LEDR pulse
  106         _PCMD = CMD_IO_SET;
  107         // Any HWPID
  108         _HWPID = HWPID_DoNotCheck;
  109 
  110         // LEDR=1 => Set PORTA.2 to 1
  111         _DpaMessage.PerIoDirectionAndSet_Request.Triplets[0].Port = PNUM_IO_PORTA;  // PORTA
  112         _DpaMessage.PerIoDirectionAndSet_Request.Triplets[0].Mask = 0b0000.0100;    // bit 2
  113         _DpaMessage.PerIoDirectionAndSet_Request.Triplets[0].Value = 0b0000.0100;   // bit 2 = 1
  114 
  115         // 64 ms pulse
  116         _DpaMessage.PerIoDirectionAndSet_Request.Delays[1].Header = PNUM_IO_DELAY;  // delay
  117         _DpaMessage.PerIoDirectionAndSet_Request.Delays[1].Delay = 64;              // 64
  118 
  119         // LEDR=0 => Set PORTA.2 to 0
  120         _DpaMessage.PerIoDirectionAndSet_Request.Triplets[2].Port = PNUM_IO_PORTA;  // PORTA
  121         _DpaMessage.PerIoDirectionAndSet_Request.Triplets[2].Mask = 0b0000.0100;    // bit 2
  122         _DpaMessage.PerIoDirectionAndSet_Request.Triplets[2].Value = 0b0000.0000;   // bit 2 = 0
  123 
  124         // Setup the correct length of data
  125         _DpaDataLength = 3 * sizeof( _DpaMessage.PerIoDirectionAndSet_Request.Triplets[0] );
  126 
  127         // Transmit DPA message with DPA Value equal the lastRSSI (can be any other value)
  128         DpaApiRfTxDpaPacket( lastRSSI, 0x7F );
  129 
  130         // Wait for the button to be released (could be done in cleaner way w/o active waiting at this point of code ...)
  131         while ( buttonPressed )
  132           clrwdt();
  133       }
  134     }
  135     break;
  136   }
  137 
  138 DpaHandleReturnFALSE:
  139   return FALSE;
  140 }
  141 //############################################################################################
  142 // Default Custom DPA Handler header; 2nd include to implement Code bumper to detect too long code of the Custom DPA Handler (modify the path according to your setup)
  143 #include "DPAcustomHandler.h"
  144 //############################################################################################