Class: Hamnet

Inherits:
Object
  • Object
show all
Defined in:
lib/hamnet.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mycall, dialfreq, carrier, modem) ⇒ Hamnet

Returns a new instance of Hamnet.



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# File 'lib/hamnet.rb', line 185

def initialize(mycall, dialfreq, carrier, modem)
  @mycall=mycall.downcase
  @dialfreq=dialfreq.to_f
  @carrier=carrier.to_i
  @modem=modem
  @sequence=0

  @queue_send=Array.new()
  @queue_recv=Array.new()
  @send_lock=Mutex.new()
  @recv_lock=Mutex.new()
  @seq_lock=Mutex.new()

  @fldigi=Fldigi.new()

  # May not need this. Seems to depend on ruby version.
  #if !XMLRPC::Config::ENABLE_NIL_PARSER
  #v, $VERBOSE=$VERBOSE, nil
  #XMLRPC::Config::ENABLE_NIL_PARSER=true
  #$VERBOSE=v
  #end

  # Light up FLDigi.
  @fldigi.receive()
  @fldigi.afc=false
  @fldigi.modem=@modem
  @fldigi.carrier=@carrier
  @fldigi.clear_tx_data()
  @fldigi.get_tx_data()
  @fldigi.get_rx_data()
  @fldigi.config()

  # Crank up the main thread.
  @loopthread=Thread.new { self.main_loop() }
  @loopthread.abort_on_exception=true
end

Instance Attribute Details

#carrier ⇒ Object

Returns the value of attribute carrier.



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# File 'lib/hamnet.rb', line 183

def carrier
  @carrier
end

#dialfreq ⇒ Object

Returns the value of attribute dialfreq.



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# File 'lib/hamnet.rb', line 183

def dialfreq
  @dialfreq
end

#modem ⇒ Object

Returns the value of attribute modem.



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# File 'lib/hamnet.rb', line 183

def modem
  @modem
end

#mycall ⇒ Object

Returns the value of attribute mycall.



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# File 'lib/hamnet.rb', line 183

def mycall
  @mycall
end

Instance Method Details

#main_loop ⇒ Object 



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# File 'lib/hamnet.rb', line 222

def main_loop
  rxdata=""
  frame=nil
  while true

    # First, send any queued outgoing frames.
    @send_lock.synchronize {
      while @queue_send.length>0 do
        f=@queue_send.shift
        puts "Transmit frame:\n#{f.to_s}"
        @fldigi.add_tx_string(f.to_s)
        @fldigi.send_buffer(true)
      end
    }

    # Get any new data from fldigi. Strip out any Unicode bullshit.
    rx=@fldigi.get_rx_data()
    rx.each_codepoint do |i|
      if i>=32 and i<=126
        rxdata=rxdata+i.chr
      end
    end

    if rxdata.length>1024
      l=rxdata.length
      rxdata=rxdata[80,l-1024]
    end

    if rxdata.scan(/</).length==0
      rxdata=""
    elsif rxdata.scan(/<<</).length>0
      rxdata=rxdata.match(/<<<.*/).to_s
    end

    # If there's a valid frame in there, process it.
    if rxdata.match(/<<<.*>>>/).to_s.length>0
      rawframe=rxdata.reverse.match(/>>>.*?<<</).to_s.reverse

      # Parse the recieved frame.
      if rawframe.length>0
        frame=RxFrame.new(rawframe)

        if frame.valid and frame.to==@mycall
          @recv_lock.synchronize {
            puts "Received valid frame with my call sign:"
            p frame
            @queue_recv.push(frame)
          }
        end

        # Remove the frame text from the buffer.
        rxdata.slice!(rawframe)
      end
    end

    # If there's a valid ping frame in the recv_queue, remove it and
    # generate a reply ping frame.
    @recv_lock.synchronize {
      if @queue_recv.length>0
        puts "length:  #{@queue_recv.length}"
        p @queue_recv
        tmp_queue=Array.new()
        @queue_recv.each do |tmpframe|
          if tmpframe.type==HAMNET_FRAME_PING
            self.send_frame(TxFrame.new(@mycall, tmpframe.from, HAMNET_FRAME_PING_REPLY, 0, @fldigi.radio_freq().to_s, true))
          elsif tmpframe.type==HAMNET_FRAME_PING_REPLY
            puts "Received a reply to our ping:"
            p tmpframe
          else
            tmp_queue.push(tmpframe)
          end
        end
        @queue_recv=tmp_queue
      end
    }

    sleep 1
  end
end

#ping(hiscall) ⇒ Object 



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# File 'lib/hamnet.rb', line 326

def ping(hiscall)
  self.send_frame(TxFrame.new(@mycall, hiscall, HAMNET_FRAME_PING, 0, nil, true))
  return(nil)
end

#recv_frame ⇒ Object 



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# File 'lib/hamnet.rb', line 316

def recv_frame()
  frame=nil
  @recv_lock.synchronize {
    if @queue_recv.length>0
      frame=@queue_recv.shift
    end
  }
  return(frame)
end

#send_frame(frame) ⇒ Object 



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# File 'lib/hamnet.rb', line 302

def send_frame(frame)
  len=nil
  @send_lock.synchronize {
    @seq_lock.synchronize {
      frame.sequence=@sequence
      @sequence=@sequence+1
      @queue_send.push(frame)
      puts "Frame added to queue_send:\n#{frame.to_s}"
      len=@queue_send.length
    }
  }
  return(len)
end