Class: GpsdBaudRate

Inherits:
Object
  • Object
show all
Defined in:
lib/gpsd_baud_rate.rb,
lib/gpsd_baud_rate/version.rb

Constant Summary collapse

VERSION = 
"0.1.32"
@@version = 
GpsdBaudRate::VERSION.to_s
@@device = 
'/dev/ttyAMA0'
@@service = 
'gpsd.service'
@@socket = 
'gpsd.socket'
@@baud_rates = 
%w[115200 57600 38400 19200 14400 9600 4800]
@@NMEA_sentences = 
%w[$GPGGA $GPGSA $GPGSV $GPRMC $GPZDA]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(goal_rate = @@baud_rates[0]) ⇒ GpsdBaudRate

Returns a new instance of GpsdBaudRate.



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# File 'lib/gpsd_baud_rate.rb', line 18

def initialize goal_rate = @@baud_rates[0]

  @logger = new_logger path: "log/GpsdBaudRate.log", progname: "GpsdBaudRate", time_format: "'%Y-%m-%d %T.%N %z %Z'", level: Logger::DEBUG
  @logger.info "GpsdBaudRate Gem - Version: #{@@version}"

  unless self.class.check_device?
    msg = "Device: #{@@device} not found"
    @logger.error msg
    raise StandardError.new msg
  else
    @logger.info "Device: #{@@device} Okay"
  end
#    pid= %x|pgrep -f "ruby /home/deploy/bin/set_baud.rb"|
#    @logger.debug "Pid:  #{pid}, $$: #{$$}, $BASHPID: #{$BASHPID}"

  @goal_rate = goal_rate.to_i
  @logger.debug  "Goal_rate: #{@goal_rate}"
end

Instance Attribute Details

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/gpsd_baud_rate.rb', line 7

def version
  @version
end

Class Method Details

.baud_rate ⇒ Object

~~~~~~~~~~~~~~~~~~~~~~~~ baud rate ~~~~~~~~~~~~~~~~~~~



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# File 'lib/gpsd_baud_rate.rb', line 104

def self.baud_rate
  %x| sudo stty -F "#{@@device}"|.split('; ')[0].split(/\W+/)[1].to_i
end

.baud_rate?(b_rate) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gpsd_baud_rate.rb', line 108

def self.baud_rate?(b_rate)
  b_rate==baud_rate
end

.check_device? ⇒ Boolean

returns true if device exists

Returns:

  • (Boolean) 


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# File 'lib/gpsd_baud_rate.rb', line 75

def self.check_device?
  # Does the @@device exist and is it a character device
  # [[ ]] returns true (0) if 'file' exists
  "0\n" == %x| [ -c "#{@@device}" ] ; echo $?|

end

.gpsd_active? ⇒ Boolean

Returns:

  • (Boolean) 


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

def self.gpsd_active?
  arry = %x|sudo systemctl status "#{@@socket}"|.split(/\n/)
  s = arry.select!{ |e| e.include? "Active:"}[0].split(/\W+/)[2]
  s == 'active'
end

.gpsd_start ⇒ Object 



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# File 'lib/gpsd_baud_rate.rb', line 95

def self.gpsd_start
  %x|sudo systemctl start "#{@@service}"|
  %x|sudo systemctl start "#{@@socket}"|
  sleep 1
  %x|sudo systemctl daemon-reload|
end

.gpsd_stop ⇒ Object 



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# File 'lib/gpsd_baud_rate.rb', line 88

def self.gpsd_stop
  %x|sudo systemctl stop "#{@@socket}"|
  %x|sudo systemctl stop "#{@@service}"|
  sleep 1
  %x|sudo systemctl daemon-reload|
end

Instance Method Details

#baud_rate=(b_rate) ⇒ Object

returns original baud_rate



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# File 'lib/gpsd_baud_rate.rb', line 113

def baud_rate=( b_rate)
  msg= %x| sudo stty #{b_rate} -F "#{@@device}"|
  msg.each {|m| @logger.debug m}
end

#set_baud_rate(b_rate = @goal_rate) ⇒ Object

initiallize



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# File 'lib/gpsd_baud_rate.rb', line 37

def set_baud_rate b_rate = @goal_rate
  @logger.debug "In set_baud_rate"
  GpsdBaudRate::gpsd_start unless GpsdBaudRate::gpsd_active?   #make sure it's running

  @logger.debug "Service Status: #{GpsdBaudRate::gpsd_active?}"
  @logger.debug "Baud Rate: #{active_rate = GpsdBaudRate::baud_rate}"
  GpsdBaudRate::gpsd_stop
  @logger.debug "Service Status: #{GpsdBaudRate::gpsd_active?}"
  @logger.debug "Baud Rate: #{inactive_rate = GpsdBaudRate::baud_rate}"

  if active_rate == b_rate.to_i
    @logger.debug "Already at Goal Baud Rate"
  else
    @logger.debug "~~~~~~~~~~~~ Read at #{active_rate} baud ~~~~~~~~~~~~~~"
    unless (read_from_device active_rate)
      @logger.debug "Read at #{active_rate} baud Failed"
    else
      @logger.debug "Setting Goal Rate (#{b_rate})"
      set_PMTK_baud_rate active_rate, b_rate
      @logger.debug "Attempting Read at #{b_rate}"
      if read_from_device b_rate
        @logger.debug "Baud Rate Modification Successful"
        @logger.debug "Goal Baud Rate (#{b_rate}) has been set"
      else
        @logger.debug "Setting Baud Rate Failed"
      end
    end
  end
#
#   Cleanup
  GpsdBaudRate::gpsd_start
  @logger.debug "Service Status: #{GpsdBaudRate::gpsd_active?}"

end

#test_baud_rate(b_rate) ⇒ Object

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



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# File 'lib/gpsd_baud_rate.rb', line 120

def test_baud_rate b_rate
  read_from_device b_rate
end