.. _program_listing_file_processors_serialoutput_serialoutput.cpp:

Program Listing for File serialoutput.cpp
=========================================

|exhale_lsh| :ref:`Return to documentation for file <file_processors_serialoutput_serialoutput.cpp>` (``processors/serialoutput/serialoutput.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // ---------------------------------------------------------------------
   // This file is part of falcon-core.
   //
   // Copyright (C) 2015, 2016, 2017 Neuro-Electronics Research Flanders
   //
   // Falcon-server is free software: you can redistribute it and/or modify
   // it under the terms of the GNU General Public License as published by
   // the Free Software Foundation, either version 3 of the License, or
   // (at your option) any later version.
   //
   // Falcon-server is distributed in the hope that it will be useful,
   // but WITHOUT ANY WARRANTY; without even the implied warranty of
   // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   // GNU General Public License for more details.
   //
   // You should have received a copy of the GNU General Public License
   // along with falcon-core. If not, see <http://www.gnu.org/licenses/>.
   // ---------------------------------------------------------------------
   
   #include "serialoutput.hpp"
   
   #include <iostream>
   
   SerialOutput::SerialOutput() {
     add_option("port address", port_address_, "Address of serial port");
     add_option("baud rate", baudrate_, "Serial rate exchange");
     add_option("event logging", event_log_, "Log message (UPDATE level) if true");
   }
   
   void SerialOutput::CreatePorts() {
   
     data_in_port_ = create_input_port<EventType>(EventType::Capabilities(),
                                                  PortInPolicy(SlotRange(1, 10), false, 1));
   }
   
   void SerialOutput::Preprocess(ProcessingContext &context) {
     if (fd_.openDevice(port_address_().c_str(), baudrate_()) != 1) {
       throw ProcessingPreprocessingError(
           "Impossible to open the serial port specified: " + port_address_(), name());
     }
   
     LOG(INFO) << name() <<"Serial port " << port_address_() << " opened.";
   }
   
   void SerialOutput::Process(ProcessingContext &context) {
   
     EventType::Data *data_in = nullptr;
     auto nslots = data_in_port_->number_of_slots();
     while (!context.terminated()) {
   
   
         while (!context.terminated()) {
   
             for (int k = 0; k < nslots; ++k) {
                 // retrieve new data
                 if (!data_in_port_->slot(k)->RetrieveData(data_in))
                   {
                     break;
                   }
   
                   auto nread = data_in_port_->slot(k)->status_read();
   
                   if (nread == 0)
                   {
                     data_in_port_->slot(k)->ReleaseData();
                     continue;
                   }
                 std::string message = data_in->event()+ "\0";
   
                 if ((fd_.writeString(message.c_str())) != 1) {
                     LOG(INFO) << name() << ". Serial message " << message
                               << " not delivered.";
                 } else {
                     LOG(INFO) << name() << ". Message " << data_in->event()
                               << " transmitted serially.";
                 }
   
                 data_in_port_->slot(k)->ReleaseData();
             }
         }
     }
   
   }
   
   
   void SerialOutput::Postprocess(ProcessingContext &context) {
     fd_.closeDevice();
   }
   
   REGISTERPROCESSOR(SerialOutput)