Class: CycleAnalystLogger::Gps

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

Constant Summary collapse

DEFAULTS = 
{
  tty: '/dev/gps',
  baudrate: 115200
}
GPS_DICT = 
{
  0 => {address: 0, name: 'Time', key: :time, units: nil, scale: 1},
  1 => {address: 1, name: 'Latitude', key: :latitude, units: 'degrees', scale: 1},
  2 => {address: 2, name: 'Longitude', key: :longitude, units: 'degrees', scale: 1},
  3 => {address: 3, name: 'Altitude', key: :altitude, units: 'meters', scale: 1},
  4 => {address: 4, name: 'Speed', key: :speed, units: 'kph', scale: 1},
  5 => {address: 5, name: 'Fix Quality', key: :fix_quality, units: nil, scale: 1},
  6 => {address: 6, name: 'Satellites', key: :satellites, units: nil, scale: 1},
  7 => {address: 7, name: 'Geoid Height', key: :geoid_height, units: nil, scale: 1},
  8 => {address: 8, name: 'Horizontal Dilution', key: :horizontal_dilution, units: nil, scale: 1},
  9 => {address: 9, name: 'Faa Mode', key: :faa_mode, units: nil, scale: 1}
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(shared_data, opts = {}) ⇒ Gps

Returns a new instance of Gps.



33
34
35
36
37
38
39
40
41
42
 
# File 'lib/cycle_analyst_logger/gps.rb', line 33

def initialize(shared_data, opts = {})
  final_opts = DEFAULTS.merge(opts)
  @tty = final_opts[:tty]
  @baudrate = final_opts[:baudrate]
  @serial_io = SerialPort.new @tty, @baudrate, 8, 1
  @dict = GPS_DICT
  @pre_data = {}
  @shared_data = shared_data
  @source_decoder = NMEAPlus::SourceDecoder.new(@serial_io)
end

Instance Attribute Details

#baudrate ⇒ Object (readonly)

Returns the value of attribute baudrate.



26
27
28
 
# File 'lib/cycle_analyst_logger/gps.rb', line 26

def baudrate
  @baudrate
end

#dict ⇒ Object (readonly)

Returns the value of attribute dict.



28
29
30
 
# File 'lib/cycle_analyst_logger/gps.rb', line 28

def dict
  @dict
end

#pre_data ⇒ Object (readonly)

Returns the value of attribute pre_data.



29
30
31
 
# File 'lib/cycle_analyst_logger/gps.rb', line 29

def pre_data
  @pre_data
end

#serial_io ⇒ Object (readonly)

Returns the value of attribute serial_io.



27
28
29
 
# File 'lib/cycle_analyst_logger/gps.rb', line 27

def serial_io
  @serial_io
end

#shared_data ⇒ Object (readonly)

Returns the value of attribute shared_data.



30
31
32
 
# File 'lib/cycle_analyst_logger/gps.rb', line 30

def shared_data
  @shared_data
end

#source_decoder ⇒ Object (readonly)

Returns the value of attribute source_decoder.



31
32
33
 
# File 'lib/cycle_analyst_logger/gps.rb', line 31

def source_decoder
  @source_decoder
end

#tty ⇒ Object (readonly)

Returns the value of attribute tty.



25
26
27
 
# File 'lib/cycle_analyst_logger/gps.rb', line 25

def tty
  @tty
end

Instance Method Details

#log_data ⇒ Object 



80
81
82
83
84
 
# File 'lib/cycle_analyst_logger/gps.rb', line 80

def log_data
 dict.map do |address, node|
    shared_data[node[:key]]
  end
end

#log_header ⇒ Object 



74
75
76
77
78
 
# File 'lib/cycle_analyst_logger/gps.rb', line 74

def log_header
  dict.map do |(address, node)|
    node[:name] + (node[:units] ? " (#{node[:units]})" : '')
  end
end

#run(fd = nil, disable_nmea_out = false) ⇒ Object 



44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
 
# File 'lib/cycle_analyst_logger/gps.rb', line 44

def run(fd = nil, disable_nmea_out = false)
  source_decoder.each_complete_message do |message|
    fd.puts message.original.strip unless disable_nmea_out
    case message.data_type[2..-1] # Ignore the first two letters
    when 'GGA'
      pre_data[:time] = message.fix_time
      pre_data[:latitude] = message.latitude
      pre_data[:longitude] = message.longitude
      pre_data[:altitude] = message.altitude
      pre_data[:dgps_station_id] = message.dgps_station_id
      pre_data[:fix_quality] = message.fix_quality
      pre_data[:geoid_height] = message.geoid_height
      pre_data[:horizontal_dilution] = message.horizontal_dilution
      pre_data[:satellites] = message.satellites
      pre_data[:seconds_since_last_update] = message.seconds_since_last_update
    when 'VTG'
      pre_data[:speed_kmh] = message.speed_kmh
      pre_data[:speed_knots] = message.speed_knots
      pre_data[:faa_mode] = message.faa_mode
      pre_data[:track_degrees_magnetic] = message.track_degrees_magnetic
      pre_data[:track_degrees_true] = message.track_degrees_true
      # Has to be a copy since shared_data is really a reference to an
      # instance variable in the outer thread.
      pre_data.each_pair { |k,v| shared_data[k] = v}
    else
      next
    end
  end
end