Module: DmmUtil

Defined in:
lib/dmm_util/fluke28x_driver.rb,
lib/dmm_util.rb,
lib/dmm_util/meter.rb,
lib/dmm_util/cursor.rb,
lib/dmm_util/reading.rb,
lib/dmm_util/recording.rb,
lib/dmm_util/measurement.rb,
lib/dmm_util/format_convertors.rb,
lib/dmm_util/recording_measurement.rb,
lib/dmm_util/recording_measurement_cursor.rb

Overview

It appears thwe are 32 bit vals: Mulit-map values Sequence numbers duration

Defined Under Namespace

Modules: FormatConvertors Classes: ByteStr, Cursor, Fluke28xDriver, Measurement, Meter, MeterError, Reading, Recording, RecordingMeasurement, RecordingMeasurementCursor

Class Method Summary collapse

Class Method Details

.open ⇒ Object 



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

def self.open
  driver = nil
  Dir.glob("/dev/tty.usbserial*").each do |tty_path|
    begin
      driver = open_driver(tty_path)
    rescue DmmUtil::MeterError
      $stderr.write "Warning: Did not find meter at #{tty_path}"
    end
  end
  raise "Could not find a valid meter, are you sure it is connected and turned on?" unless driver
  Meter.new(driver)
end

.open_driver(tty_path) ⇒ Object

Raises:



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# File 'lib/dmm_util.rb', line 27

def self.open_driver(tty_path)
  port = SerialPort.new(tty_path, {"parity"=>0, "stop_bits"=>1, "baud"=>115200, "data_bits"=>8})
  port.read_timeout = 1
  meter = Fluke28xDriver.new(port)
  
  raise MeterError.new("Device at #{tty_path} does not seem to be a supported DMM") unless meter.valid?
  meter
end