from ..message_base import MessageBase from ..constants import Subaddress, TwsValidity, HptIdentifier, TrackPriority, TrackAccuracy from ..fields import BitField, EnumField, ScaledField class MsgB1(MessageBase): """ Message B1: TWS Status and Targets 1 and 2 ID: B1 Direction: RT -> BC (Transmit) Subaddress: 11 Rate: 6.25 Hz Document Ref: 7.2.1 Contains: - Global TWS status (Validity, Priority, IDs for all 8 tracks) - Kinematic data for Target 01 and Target 02 """ SUBADDRESS = Subaddress.TX_TWS_1_2 IS_TRANSMIT = True # --- Word 01: Validity Word and HPT Identifier (Ref 7.2.1.1) --- validity_tgt_01 = EnumField(word_index=0, start_bit=0, width=1, enum_cls=TwsValidity) validity_tgt_02 = EnumField(word_index=0, start_bit=1, width=1, enum_cls=TwsValidity) validity_tgt_03 = EnumField(word_index=0, start_bit=2, width=1, enum_cls=TwsValidity) validity_tgt_04 = EnumField(word_index=0, start_bit=3, width=1, enum_cls=TwsValidity) validity_tgt_05 = EnumField(word_index=0, start_bit=4, width=1, enum_cls=TwsValidity) validity_tgt_06 = EnumField(word_index=0, start_bit=5, width=1, enum_cls=TwsValidity) validity_tgt_07 = EnumField(word_index=0, start_bit=6, width=1, enum_cls=TwsValidity) validity_tgt_08 = EnumField(word_index=0, start_bit=7, width=1, enum_cls=TwsValidity) hpt_identifier = EnumField(word_index=0, start_bit=8, width=4, enum_cls=HptIdentifier) # Bits 12-15 Spare # --- Word 02: Track Priority Targets 01-04 (Ref 7.2.1.2) --- priority_tgt_01 = EnumField(word_index=1, start_bit=0, width=3, enum_cls=TrackPriority) priority_tgt_02 = EnumField(word_index=1, start_bit=3, width=3, enum_cls=TrackPriority) priority_tgt_03 = EnumField(word_index=1, start_bit=6, width=3, enum_cls=TrackPriority) priority_tgt_04 = EnumField(word_index=1, start_bit=9, width=3, enum_cls=TrackPriority) # Bits 12-15 Spare # --- Word 03: Track Priority Targets 05-08 (Ref 7.2.1.3) --- priority_tgt_05 = EnumField(word_index=2, start_bit=0, width=3, enum_cls=TrackPriority) priority_tgt_06 = EnumField(word_index=2, start_bit=3, width=3, enum_cls=TrackPriority) priority_tgt_07 = EnumField(word_index=2, start_bit=6, width=3, enum_cls=TrackPriority) priority_tgt_08 = EnumField(word_index=2, start_bit=9, width=3, enum_cls=TrackPriority) # Bits 12-15 Spare # --- Word 04: Track Accuracy Targets 01-04 (Ref 7.2.1.4) --- # Note: Gaps between fields as per Table B1/04-A/C/E/G accuracy_tgt_01 = EnumField(word_index=3, start_bit=0, width=2, enum_cls=TrackAccuracy) accuracy_tgt_02 = EnumField(word_index=3, start_bit=4, width=2, enum_cls=TrackAccuracy) accuracy_tgt_03 = EnumField(word_index=3, start_bit=8, width=2, enum_cls=TrackAccuracy) accuracy_tgt_04 = EnumField(word_index=3, start_bit=12, width=2, enum_cls=TrackAccuracy) # --- Word 05: Track Accuracy Targets 05-08 (Ref 7.2.1.5) --- accuracy_tgt_05 = EnumField(word_index=4, start_bit=0, width=2, enum_cls=TrackAccuracy) accuracy_tgt_06 = EnumField(word_index=4, start_bit=4, width=2, enum_cls=TrackAccuracy) accuracy_tgt_07 = EnumField(word_index=4, start_bit=8, width=2, enum_cls=TrackAccuracy) accuracy_tgt_08 = EnumField(word_index=4, start_bit=12, width=2, enum_cls=TrackAccuracy) # --- Word 06-09: Track IDs (Ref 7.2.1.6 - 7.2.1.9) --- track_id_tgt_01 = BitField(word_index=5, start_bit=0, width=8) track_id_tgt_02 = BitField(word_index=5, start_bit=8, width=8) track_id_tgt_03 = BitField(word_index=6, start_bit=0, width=8) track_id_tgt_04 = BitField(word_index=6, start_bit=8, width=8) track_id_tgt_05 = BitField(word_index=7, start_bit=0, width=8) track_id_tgt_06 = BitField(word_index=7, start_bit=8, width=8) track_id_tgt_07 = BitField(word_index=8, start_bit=0, width=8) track_id_tgt_08 = BitField(word_index=8, start_bit=8, width=8) # --- Word 10-11: HPT Display Coordinates (Ref 7.2.1.10 - 7.2.1.11) --- hpt_display_x = BitField(word_index=9, start_bit=0, width=10) # Pixels hpt_display_y = BitField(word_index=10, start_bit=0, width=10) # Pixels # ========================== TARGET 01 DATA ========================== # Ref 7.2.1.12 to 7.2.1.20 # Word 12: Time Tag (LSB 64us) tgt_01_time_tag = ScaledField(word_index=11, start_bit=0, width=16, lsb_value=64.0) # Word 13: Range (LSB 8 ft, Unsigned) tgt_01_range = ScaledField(word_index=12, start_bit=0, width=16, lsb_value=8.0) # Word 14-16: Position (LSB 16 ft, 2's comp) tgt_01_pos_x = ScaledField(word_index=13, start_bit=0, width=16, lsb_value=16.0, signed=True) tgt_01_pos_y = ScaledField(word_index=14, start_bit=0, width=16, lsb_value=16.0, signed=True) tgt_01_pos_z = ScaledField(word_index=15, start_bit=0, width=16, lsb_value=2.5, signed=True) # NOTE: Z LSB is 2.5 ft per 7.2.1.16 # Word 17: Velocity Magnitude (LSB 0.0625 ft/s, Unsigned) tgt_01_vel_mag = ScaledField(word_index=16, start_bit=0, width=16, lsb_value=0.0625) # Word 18-20: Velocity XYZ (LSB 0.125 ft/s, 2's comp) tgt_01_vel_x = ScaledField(word_index=17, start_bit=0, width=16, lsb_value=0.125, signed=True) tgt_01_vel_y = ScaledField(word_index=18, start_bit=0, width=16, lsb_value=0.125, signed=True) tgt_01_vel_z = ScaledField(word_index=19, start_bit=0, width=16, lsb_value=0.125, signed=True) # ========================== TARGET 02 DATA ========================== # Word 21: Time Tag tgt_02_time_tag = ScaledField(word_index=20, start_bit=0, width=16, lsb_value=64.0) # Word 22: Range tgt_02_range = ScaledField(word_index=21, start_bit=0, width=16, lsb_value=8.0) # Word 23-25: Position tgt_02_pos_x = ScaledField(word_index=22, start_bit=0, width=16, lsb_value=16.0, signed=True) tgt_02_pos_y = ScaledField(word_index=23, start_bit=0, width=16, lsb_value=16.0, signed=True) tgt_02_pos_z = ScaledField(word_index=24, start_bit=0, width=16, lsb_value=2.5, signed=True) # Word 26: Velocity Magnitude tgt_02_vel_mag = ScaledField(word_index=25, start_bit=0, width=16, lsb_value=0.0625) # Word 27-29: Velocity XYZ tgt_02_vel_x = ScaledField(word_index=26, start_bit=0, width=16, lsb_value=0.125, signed=True) tgt_02_vel_y = ScaledField(word_index=27, start_bit=0, width=16, lsb_value=0.125, signed=True) tgt_02_vel_z = ScaledField(word_index=28, start_bit=0, width=16, lsb_value=0.125, signed=True)