Class: AlphaSign

Inherits:
Object
  • Object
show all
Includes:
Format, Protocol
Defined in:
lib/alphasign.rb

Defined Under Namespace

Modules: Format, Protocol

Constant Summary

Constants included from Format

Format::CharSet, Format::Color, Format::Count1, Format::Count2, Format::Count3, Format::Count4, Format::Count5, Format::DoubleHighOff, Format::DoubleHighOn, Format::Extended, Format::FlashCharOff, Format::FlashCharOn, Format::Mode, Format::Position, Format::Speed, Format::StartMode, Format::TempC, Format::TempF, Format::TrueDecendersOff, Format::TrueDecendersOn

Constants included from Protocol

Protocol::Baud, Protocol::DataBits, Protocol::Footer, Protocol::Parity, Protocol::Preamble, Protocol::StartCMD, Protocol::StartHeader, Protocol::StopBits

Instance Method Summary collapse

Constructor Details

#initialize(device = "/dev/ttyS0") ⇒ AlphaSign

for now we only speak rs232

Parameters:

  • device (String) (defaults to: "/dev/ttyS0") —

    the serial device the sign is connected to



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# File 'lib/alphasign.rb', line 14

def  initialize (device = "/dev/ttyS0")
  @device= device

  # Protocol allows multiple signs on the same port, we are not
  # going to expose that possibility yet but we will recognize this
  # as an instance variable Where "Z" all units, "00" first unit or
  # broadcast?
  @addr = [ 'Z00' ].pack('A3')
  
end

Instance Method Details

#rawwrite(msg) ⇒ Object

raw serial port for testing this will go away (or atleast become private)



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# File 'lib/alphasign.rb', line 60

def rawwrite (msg)
  sp=SerialPort.new(@device,                                                             
                    Baud,  DataBits,  StopBits,  Parity) 
  sp.write msg
  sp.close
end

#write(msg, opts = { }) ⇒ Object

we don’t have an open yet so this still kludgey and enfoces using only :wtxt command as thats the only one we know we can do @param for control characters for color, font, etc. or nil (for comand modes that don’t use it) any value from 0x20 to 0x75 except 0x30 which is reserved

Parameters:

  • msg (STRING) —

    the message (text file in Alpha parlance) @see AlphaSign::Format

  • opts (HASH) (defaults to: { }) —

    the write options

Options Hash (opts):

  • :position (Symbol) —

    display position @see AlphaSign::Format::Position

Raises:

  • (ArgumentError) 


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# File 'lib/alphasign.rb', line 35

def  write (msg, opts={ })
 opts[:position]=:middle unless opts[:position] # default to middle position
 opts[:mode]=:hold unless opts[:mode] #default to static display
 opts[:fileLabel] =  0x41 unless opts[:fileLabel] #this was default in exampelso why not..

 raise ArgumentError.new("unkown position #{opts[:position]}") unless Position.has_key?(opts[:position])
 raise ArgumentError.new("unkown mode #{opts[:mode]}") unless Mode.has_key?(opts[:mode])
 raise ArgumentError.new("invalid File Label specification") unless (opts[:fileLabel] == nil) or  ((opts[:fileLabel].kind_of? Integer) and ( opts[:fileLabel] >= 0x20 and opts[:fileLabel] <= 0x75 and opts[:fileLabel] != 0x30))
 if opts[:fileLabel] == nil
   @filelabel=""
 else
   @filelabel=[opts[:fileLabel]].pack("C")
 end

  @alphaFormat = StartMode + Position[opts[:position]] + Mode[opts[:mode]]
  @alphaHeader =  StartHeader + @addr +  StartCMD[:wtxt] + @filelabel + @alphaFormat
  sp=SerialPort.new(@device,  
                  Baud,  DataBits,  StopBits,  Parity)
  sp.write @alphaHeader
  sp.write msg
  sp.write Footer
  sp.close
end