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::CallDots, Format::CallString, Format::CharSet, Format::Color, Format::Count1, Format::Count2, Format::Count3, Format::Count4, Format::Count5, Format::DoubleHighOff, Format::DoubleHighOn, Format::Extended, Format::FixWidth, 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::FileType, 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=SerialPort.new(device, Baud,  DataBits,  StopBits,  Parity) 
  @memsync=false
  # default file setup, we should read this from the device, for now
  # just enforce our own & hope no other process is messing with it
  # (that's why we're 0.x.x)
  @files={
    # 256 byte text file always displayed
    :default => AlphaFile.new(:txt, "A", "0100", "FF00"),
    # 80 byte string file
    :str1   => AlphaFile.new(:str, "B", "0050", "0000"),
    # another string file
    :str2   => AlphaFile.new(:str, "C", "0050", "0000"),
    # 16 (0x10) row by 120 (0x78) column dots file in 3 colors
    # not sure why but htat's what "2000" means in this context
    :dot1   => AlphaFile.new(:dot, "D", "1078", "2000"),
    # another dots file
    :dot2   => AlphaFile.new(:dot, "E", "1078", "2000"),
  }

  # 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 unit types, "00" is broadcast
  @addr = 'Z00'

  # write out initial memory config to sign
  writemem
end

Instance Method Details

#callstr(filename = :str1) ⇒ Object

this returns code to insert a named string file in txt file

Raises:

  • (ArgumentError) 


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# File 'lib/alphasign.rb', line 82

def callstr (filename=:str1)
  raise ArgumentError.new("filename must be a preconfigured as a string file in momory")unless @files[filename].type == :str
  CallString +  @files[filename].label
end

#write(msg, opts = { }) ⇒ Object

This is for writing “txt” files

Parameters:

  • msg (STRING) —

    the message (text file in Alpha parlance)

  • opts (HASH) (defaults to: { }) —

    the write options

Options Hash (opts):

  • :position (Symbol) —

    display position @see AlphaSign::Format::Position

Raises:

  • (ArgumentError)

See Also:



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# File 'lib/alphasign.rb', line 50

def  write (msg, opts={ })

 # default to middle position
 opts[:position]=:middle unless opts[:position] 

 #default to static display
 opts[:mode]=:hold unless opts[:mode] 

 # sign file to write to, carefule these need to be setup before
 # they can be written to...
 opts[:filename]=:default unless opts [:filename]
 raise ArgumentError.new(":filename must be a preconfigured as a txt file in momory")unless @files[opts[:filename]].type == :txt
 
 @format = StartMode + Position[opts[:position]] + Mode[opts[:mode]]

 rawwrite  StartCMD[:wtxt]+ @files[opts[:filename]].label + @format + msg 
end

#writestr(msg, filename = :str1) ⇒ Object

write to a string file (this must then be called from a text file for display, but string files are buffered so good for frequent updates without flashing screen like txt files do defaults to “:str1” part of default memory config

Parameters:

  • msg (STRING) —

    the message string

  • filename (Symbol) (defaults to: :str1) —

    a key from @files hash for a configure :txt file

Raises:

  • (ArgumentError)

See Also:



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# File 'lib/alphasign.rb', line 76

def writestr (msg,filename=:str1)
  raise ArgumentError.new("filename must be a preconfigured as a string file in momory")unless @files[filename].type == :str
  rawwrite StartCMD[:wstr] + @files[filename].label + msg
end