Revision as of 20:54, 30 January 2008

Here is my ThreadedRuby code. I'm trying to add notes and a bit of an explanation as to what each piece of code does. If you just want to get going, create a class Object for your protocol as per in section 5.

Device Object

This class is simply a holder for a Child Device with onoff and level added:

class Device
  attr_accessor  :devdata, :deviceid, :template, :parent, :onoff, :level
  def initialize()                                               
    @onoff = 'OFF'                                                #State
    @level = 0                                                    #Level
    @devdata = Hash.new                                           #to hold devdata
    @deviceid = @template = @parent = 0
  end
end

$devices hash

This hash contains all the Device Objects (child objects with state info)

This is initialized in initDevices()

Command Object

This is the PARENT class to your protocol Object. This class is responsible for determining the DIRECTION of the conversation: either DCEtoGSD (from DCERouter to your GSD Device) or GSDtoDCE (from your GSD Device to DCERouter)

The actual data is irrelevant in this object. The data is simply passed to your protocol Object.

$Commands Array

This is an Array of the Command Objects. This serves as the queue for the threading.

Once a command has been completed, it is removed from this array.

Your protocol Obect determines if the command is complete by setting the @responseAccepted = true, and @responseNeeded = false.

This will, in turn set the (command object's) state to Complete.

If a command object's state = Complete, the command is removed from the queue (array).

You can accept MULTIPLE responses for your command by keeping @responseNeeded = true.

PLCBUS OBJECT

This is a generic replaceable object This object needs the following methods:

Methods

Initialize()

• What it does:

any Object initialization you may need.

• When is this called:

Upon Object creation.

• What you will get:

nothing.

• What you will return:

nothing.

dceCommandIn(cmd)

• What is does:

sends you a command object to allow you to create gsdOut().

• What you will get:

cmd (Command Object)

• What you need to return:

nothing (ignored)

• When you will get this:

executed when a new DCE command is sent to you.

dceResponseIn(cmd)

• What it does:

Sends you a DCE object to compare with the command.

• What you will get:

cmd (Command Object)

• What you need to return:

TRUE if you accept this response.

FALSE if you do NOT accept this response.

• When you will get this:

executed when a new DCE response is ready.

gsdCommandIn(value)

• What it does:

sends you a String to allow you to create a dceOut().

• What you will get:

value (String Object)

• What you need to return:

nothing (ignored)

• When you will get this:

executed when a new GSD command is sent to you.

gsdResponseIn(value)

• What it does:

Sends you a GSD Response to compare with the command.

• What you will get:

cmd (Command Object)

• What you need to return:

TRUE if you accept this response.

FALSE if you do NOT accept this response.

• When you will get this:

executed when a new GSD response is ready.

dceout()

• What it does:

Creates a Command Object to send to DCE.

• What you will get:

nothing.

• What you need to return:

a Command Object representing the previous gsdCommandIn.

• When is this called:

After a gsdCommandIn has been sent.

gsdout()

• What it does:

creates a String Object to send to GSD.

• What you will get:

nothing.

• What you will return:

a String Object representing the previous dceCommandIn.

• When is this called:

After a dceCommandIn has been sent.

Properties:

@responseAccepted

• What it does:

signals that the current response is accepted as valid.

• When you should set this:

Set this to TRUE if you accept the response as a valid response for this command.

Set this to FALSE if you do NOT accept this response

@responseNeeded

  What it does:
    signals when you need a response.        
  

@commandHolder

• What it does:

If you need to create a new command, this is the holder for it.

ProtocolObject Class Template

class PLCBUS
  attr_reader :responseAccepted, :responseNeeded, :commandHolder, :threaded

  #Constants:  Set up any constants here...
  STX=0x02.chr
  ETX=0x03.chr
  
  def initialize()
    @responseAccepted = false
    @responseNeeded = false
    @commandHolder = nil
    @threaded = true

    #set up any variable initialization here.

  end

  def dceCommandIn(cmd)

    #This is fired when a new DCE command is created.
    #cmd is a Command object ie Command.new
    #eg:
    @dcehomeunit = $devices[cmd.devidto_].devdata[12][0..1]
    @dcehome = HomeCodes[$devices[cmd.devidto_].devdata[12][0].chr].to_s
    @dceunit = UnitCodes[$devices[cmd.devidto_].devdata[12][1].chr].to_s
    @dcefrom = cmd.devidfrom_
    @dceto = cmd.devidto_
    @dcepriority = cmd.priority_
    @dcecmdtype = cmd.type_
    @dcecmdid = cmd.id_
    @dceparams = cmd.params_

  end

  def dceResponseIn(cmd)
     # Returns TRUE if response is accepted.
     #This is a RESPONSE from DCE.  Normally, we do not get DCE responses
     #as the DCE commands we send do not need a Reply.
     #but if you need it, here is where you get it.

    return true #or false
  end

  def gsdCommandIn(value)

    @gsdusercode = value[2]
    @gsdhomeunit = ("%X" %value[3])
    @gsdhome = @gsdhomeunit[0].chr
    @gsdunit = @gsdhomeunit[1].chr
    @gsdcommand = value[4]
    @gsdcmdAckPulse = true if (value[4] & 0x20) == 0x20
    @gsdcmdReprq = true if (value[4] & 0x40) == 0x40
    @gsdcmdLink = true if (value[4] & 0x80) == 0x80
    @gsddata1 = value[5]
    @gsddata2 = value[6]
    if value[1] == 6
      rxtxSwitchRegister(value[7])   #set switches if they exist
    end

  end
  def gsdResponseIn(value)
    #returns TRUE if response is accepted.
    #no need to store response.. just compare.
    @result = true
    #value is a string from GSD.
    #validate if you accept this response here....

    return @result
  end
  def dceout
    # Returns the GSD values as a DCE command.
    @myfrom = gsdhomeunit
    if @myfrom == 0
      log('I DONT KNOW THIS DEVICE ID')
    else
      @mycommandout = gsdcommand
      @cmdout = Command.new(@myfrom, -1001, 1, 2, @mycommandout)
      @gsdparams.each_pair{|k,v| @cmdout.params_[k]=v}
      return @cmdout
    end
  end
  def gsdout
    # Returns the DCE values as a gsd string
    @threaded = false #PLCBUS does not support threading
    #compile the output string from the values set in dceCommandIn(cmd)

    @gsdout = @usercode.chr
    @gsdout += dcehomeunit + dcecommand(@dcecmdid) + @data1.chr + @data2.chr
    @gsdout = @gsdout.length.chr + @gsdout
    @gsdout = STX + @gsdout + ETX
    return @gsdout
  end

  def checkResponse(cmd)   #old?? fired when a response was accepted.
    @responseAccepted = true
  end



### Below you can add any kind of support routines you may need for your protocol.
#I've deleted most of the code for brevity of a template.

  #Support Routines for PLCBUS
  def dcecommand(value) #DCE value is DCE Command.
    #user code is in devdata[59] Configuration
    #devdata[250] 3phase (boolean)
    case value
    when 192 #ON

    when 193 #OFF

    when 184 # SETLEVEL
    end

    return @command.chr
  end
  def gsdcommand 
  #returns DCE EVENT!! and compiles params

    case CommandFunctions[@gsdcommand]
    when 'ALL UNIT OFF'
      @gsdparams[10] = '0'
      return 48
    when 'ALL LTS ON'
      @gsdparams[10] = '1'
      return 48
    when 'ON'
      @gsdparams[10] = '1'
      return 48
    when 'OFF'
      @gsdparams[10] = '0'
      return 48
    when 'DIM'
      @gsdparams[10] = @gsddata1 # set Brightness
      return 48

    when 'BRIGHT'
      @gsdparams[10] = @gsddata1 # set Brightness
      return 48

    when 'ALL LIGHT OFF'
      @gsdparams[10] = '0'
      return 48
    when 'ALL USER LTS ON'
      @gsdparams[10] = '1'
      return 48
    when 'ALL USER UNIT OFF'
      @gsdparams[10] = '0'
      return 48
    when 'ALL USER LIGHT OFF'
      @gsdparams[10] = '0'
      return 48
    when 'PRESETDIM'
      @gsdparams[10] = @gsddata1
      return 48
    else
      return 0
    end
  return 0
  end

  def rxtxSwitchRegister(value)
    #log('setting RX_TX_SWITCH')
    if (value & 0x40) == 0x40
      #log('r_id_sw is set') 
      @r_id_sw = true
    else
      #log('r_id_sw is reset') 
      @r_id_sw = false
    end
    if (value & 0x20) == 0x20
      #log('r_ack_sw is set') 
      @r_ack_sw = true 
      @responseNeeded = false
    else
      #log('ResponseNeeded set to TRUE')
      @responseNeeded = true
      #log('r_ack_sw is reset') 
      @r_ack_sw = false
    end
    if (value & 0x10) == 0x10
      #log('r_itself is set') 
      @r_itself = true 
      log('I heard myself Transmit this command on the PLCBUS.')
    else
      #log('r_itself is reset') 
      @r_itself = false 
      log('This Command is transmitted from an OUTSIDE SOURCE!')
    end
    if (value & 0x8) == 0x8
      #log('r_risc is set') 
      @r_risc = true 
    else
      #log('r_risc is reset') 
      @r_risc = false
    end
    if (value & 0x4) == 0x4
      #log('r_sw is set') 
      @r_sw = true 
    else
      #log('r_sw is reset') 
      @r_sw = false
    end
    
  end

  #Generic Support Routines
  def log(line)
    @log = File.open("/var/log/pluto/" + $me.deviceid.to_s + "_Generic_Serial_Device.log", "a")
    @log.putc '('[0]
    @log.putc 'P'[0]
    @log.putc 'L'[0]
    @log.putc 'C'[0]
    @log.putc ')'[0]
    @l = line.to_s
    @l.each_byte{|ch|
      @log.putc ch
      if ch == 60
        @log.putc 32
      end
    }
    @log.puts
    @log.close
    @log = nil
  end
  def debug(label, text)
    work = label + ":"
    for c in 1..text.length
      work += padhex("%X" %text[c-1]) + ' '
    end
    log(BLUE + work + "Length:" + text.length.to_s + GREY)
  end
  def padhex(hex)
    if hex.length==1
      hex = "0" + hex
    end
    return hex
  end
end