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package nmea
import "errors"
const (
// TypeXDR type of XDR sentence for Transducer Measurement
TypeXDR = "XDR"
)
const (
// TransducerAngularDisplacementXDR is transducer type for Angular displacement
TransducerAngularDisplacementXDR = "A"
// TransducerTemperatureXDR is transducer type for Temperature
TransducerTemperatureXDR = "C"
// TransducerDepthXDR is transducer type for Depth
TransducerDepthXDR = "D"
// TransducerFrequencyXDR is transducer type for Frequency
TransducerFrequencyXDR = "F"
// TransducerHumidityXDR is transducer type for Humidity
TransducerHumidityXDR = "H"
// TransducerForceXDR is transducer type for Force
TransducerForceXDR = "N"
// TransducerPressureXDR is transducer type for Pressure
TransducerPressureXDR = "P"
// TransducerFlowXDR is transducer type for Flow
TransducerFlowXDR = "R"
// TransducerAbsoluteHumidityXDR is transducer type for Absolute humidity
TransducerAbsoluteHumidityXDR = "B"
// TransducerGenericXDR is transducer type for Generic
TransducerGenericXDR = "G"
// TransducerCurrentXDR is transducer type for Current
TransducerCurrentXDR = "I"
// TransducerSalinityXDR is transducer type for Salinity
TransducerSalinityXDR = "L"
// TransducerSwitchValveXDR is transducer type for Switch, valve
TransducerSwitchValveXDR = "S"
// TransducerTachometerXDR is transducer type for Tachometer
TransducerTachometerXDR = "T"
// TransducerVoltageXDR is transducer type for Voltage
TransducerVoltageXDR = "U"
// TransducerVolumeXDR is transducer type for Volume
TransducerVolumeXDR = "V"
)
// XDR - Transducer Measurement
// https://gpsd.gitlab.io/gpsd/NMEA.html#_xdr_transducer_measurement
// https://www.eye4software.com/hydromagic/documentation/articles-and-howtos/handling-nmea0183-xdr/
//
// Format: $--XDR,a,x.x,a,c--c, ..... *hh<CR><LF>
// Example: $HCXDR,A,171,D,PITCH,A,-37,D,ROLL,G,367,,MAGX,G,2420,,MAGY,G,-8984,,MAGZ*41
// $SDXDR,C,23.15,C,WTHI*70
type XDR struct {
BaseSentence
Measurements []XDRMeasurement
}
// XDRMeasurement is measurement recorded by transducer
type XDRMeasurement struct {
// TransducerType is type of transducer
// * A - Angular displacement
// * C - Temperature
// * D - Depth
// * F - Frequency
// * H - Humidity
// * N - Force
// * P - Pressure
// * R - Flow
// * B - Absolute humidity
// * G - Generic
// * I - Current
// * L - Salinity
// * S - Switch, valve
// * T - Tachometer
// * U - Voltage
// * V - Volume
// could be more
TransducerType string
// Value of measurement
Value float64
// Unit of measurement
// * "" - could be empty!
// * A - Amperes
// * B - Bars | Binary
// * C - Celsius
// * D - Degrees
// * H - Hertz
// * I - liters/second
// * K - Kelvin | Density, kg/m3 kilogram per cubic metre
// * M - Meters | Cubic Meters (m3)
// * N - Newton
// * P - percent of full range | Pascal
// * R - RPM
// * S - Parts per thousand
// * V - Volts
// could be more
Unit string
// TransducerName is name of transducer where measurement was recorded
TransducerName string
}
// newXDR constructor
func newXDR(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeXDR)
xdr := XDR{
BaseSentence: s,
Measurements: nil,
}
if len(p.Fields)%4 != 0 {
return xdr, errors.New("XDR field count is not exactly dividable by 4")
}
xdr.Measurements = make([]XDRMeasurement, 0, len(s.Fields)/4)
for i := 0; i < len(s.Fields); {
tmp := XDRMeasurement{
TransducerType: p.EnumString(
i,
"transducer type",
TransducerAngularDisplacementXDR,
TransducerTemperatureXDR,
TransducerDepthXDR,
TransducerFrequencyXDR,
TransducerHumidityXDR,
TransducerForceXDR,
TransducerPressureXDR,
TransducerFlowXDR,
TransducerAbsoluteHumidityXDR,
TransducerGenericXDR,
TransducerCurrentXDR,
TransducerSalinityXDR,
TransducerSwitchValveXDR,
TransducerTachometerXDR,
TransducerVoltageXDR,
TransducerVolumeXDR,
),
Value: p.Float64(i+1, "measurement value"),
Unit: p.EnumString(
i+2,
"measurement unit",
UnitAmpere,
UnitBars,
UnitBinary,
UnitCelsius,
UnitDegrees,
UnitHertz,
UnitLitresPerSecond,
UnitKelvin,
UnitKilogramPerCubicMetre,
UnitNewtons,
UnitMeters,
UnitCubicMeters,
UnitRevolutionsPerMinute,
UnitPercent,
UnitPascal,
UnitPartsPerThousand,
UnitVolts,
),
TransducerName: p.String(i+3, "transducer name"),
}
xdr.Measurements = append(xdr.Measurements, tmp)
i += 4
}
return xdr, p.Err()
}
|
