如何使用ASN1.IO Playground

根据ASN1C编译生成的协议，以CSAE 53-2020的BSM.asn为例

BSM DEFINITIONS AUTOMATIC TAGS ::= BEGIN

-- imports and exports

EXPORTS BasicSafetyMessage;
IMPORTS AccelerationSet4Way FROM DefAcceleration
		BrakeSystemStatus FROM VehBrake
		VehicleSize FROM VehSize
		Position3D, PositionConfidenceSet, PositionalAccuracy FROM DefPosition
		DSecond, TimeConfidence FROM DefTime
		TransmissionState FROM VehStatus
		Speed, Heading, SteeringWheelAngle, MotionConfidenceSet FROM DefMotion
		MsgCount FROM MsgFrame
		VehicleClassification FROM VehClass
		VehicleSafetyExtensions FROM VehSafetyExt
		VehicleEmergencyExtensions FROM VehEmgExt;

	BasicSafetyMessage ::= SEQUENCE {
		msgCnt MsgCount,
		id OCTET STRING (SIZE(8)),
		-- temperary vehicle ID
		secMark DSecond,
		timeConfidence TimeConfidence OPTIONAL,
		pos Position3D,
		posAccuracy PositionalAccuracy OPTIONAL,
		-- Accuracy for GNSS system
		posConfidence PositionConfidenceSet OPTIONAL,
		-- Realtime position confidence
		transmission TransmissionState,
		speed Speed,
		heading Heading,
		angle SteeringWheelAngle OPTIONAL,
		motionCfd MotionConfidenceSet OPTIONAL,
		accelSet AccelerationSet4Way,
		brakes BrakeSystemStatus,
		size VehicleSize,
		vehicleClass VehicleClassification,
		-- VehicleClassification includes BasicVehicleClass and other extendible type
		safetyExt VehicleSafetyExtensions OPTIONAL,
		emergencyExt VehicleEmergencyExtensions OPTIONAL,
		...
	}

END

（1）截取以下部分：

BasicSafetyMessage ::= SEQUENCE {
		msgCnt MsgCount,
		id OCTET STRING (SIZE(8)),
		-- temperary vehicle ID
		secMark DSecond,
		timeConfidence TimeConfidence OPTIONAL,
		pos Position3D,
		posAccuracy PositionalAccuracy OPTIONAL,
		-- Accuracy for GNSS system
		posConfidence PositionConfidenceSet OPTIONAL,
		-- Realtime position confidence
		transmission TransmissionState,
		speed Speed,
		heading Heading,
		angle SteeringWheelAngle OPTIONAL,
		motionCfd MotionConfidenceSet OPTIONAL,
		accelSet AccelerationSet4Way,
		brakes BrakeSystemStatus,
		size VehicleSize,
		vehicleClass VehicleClassification,
		-- VehicleClassification includes BasicVehicleClass and other extendible type
		safetyExt VehicleSafetyExtensions OPTIONAL,
		emergencyExt VehicleEmergencyExtensions OPTIONAL,
		...
	}

（2）按照该部分的内容，依次粘贴其他ASN文件，将其放在同一个文件下，并取名为***.asn
（3）进入该网站https://asn1.io/asn1playground/
点击如下图所示部分：

rec1value MessageFrame ::= bsmFrame : {
  msgCnt 10,
  id '1020300000000000'H,
  secMark 1234,
  pos {
    lat 1000,
    long 230000
  },
  transmission forwardGears,
  speed 1234,
  heading 456,
  accelSet {
    long 12,
    lat 34,
    vert 56,
    yaw 78
  },
  brakes {
  },
  size {
    width 90,
    length 0
  },
  vehicleClass {
    classification 20
  }
}

结束！