Ashin Walpola
33c4ec5998
- Firmware: rewrite obu-firmware TX loop to be serial-driven (no on-chip timer), add promiscuous RX + GeoNetworking/BTP unwrap (gn_unwrap.c), add binary UART framing to the phone (serial_link.c/.h). Drop local cam_encode() - CAM is now built on the phone. - Kotlin: byte-exact UPER CAM encoder/decoder ported from cam.c (BitWriter/BitReader/CamUperCodec), matching SerialFrame codec, real UsbSerialTransport (usb-serial-for-android), CamTransmitLoop (1Hz base rate, event/geofence boost, ESP32-C5-only), wired into CamUseCaseRepository for RX and TripRecordingService for TX. - Add V2X message retention: persist all CAM (own+remote) to Room while recording, drop otherwise (DB v2 -> v3 migration). - Add jitpack repo + usb-serial-for-android dependency. Fixes: UsbSerialTransport now uses SerialInputOutputManager.start()/stop() (this lib version manages its own thread internally) instead of manual Runnable/Thread submission, which didn't compile.
68 lines
3.6 KiB
C
68 lines
3.6 KiB
C
#ifndef DENM_H
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#define DENM_H
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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// Full CauseCodeType enumeration, straight from the authoritative source:
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// ETSI TS 102 894-2 (CDD) ITS-Container.asn, CauseCodeType definition.
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// (Values 1/2/3/14/26/27/91/94/95/97 were already cross-checked earlier
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// against a real captured DENM; the rest are now confirmed the same way,
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// from the actual ASN.1 module rather than guessed.)
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#define DENM_CAUSE_RESERVED 0
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#define DENM_CAUSE_TRAFFIC_CONDITION 1
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#define DENM_CAUSE_ACCIDENT 2
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#define DENM_CAUSE_ROADWORKS 3
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#define DENM_CAUSE_IMPASSABILITY 5
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#define DENM_CAUSE_ADVERSE_WEATHER_ADHESION 6
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#define DENM_CAUSE_AQUAPLANNING 7
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#define DENM_CAUSE_HAZARDOUS_LOCATION_SURFACE_CONDITION 9
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#define DENM_CAUSE_HAZARDOUS_LOCATION_OBSTACLE_ON_ROAD 10
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#define DENM_CAUSE_HAZARDOUS_LOCATION_ANIMAL_ON_ROAD 11
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#define DENM_CAUSE_HUMAN_PRESENCE_ON_ROAD 12
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#define DENM_CAUSE_WRONG_WAY_DRIVING 14
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#define DENM_CAUSE_RESCUE_AND_RECOVERY_WORK_IN_PROGRESS 15
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#define DENM_CAUSE_ADVERSE_WEATHER_EXTREME 17
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#define DENM_CAUSE_ADVERSE_WEATHER_VISIBILITY 18
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#define DENM_CAUSE_ADVERSE_WEATHER_PRECIPITATION 19
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#define DENM_CAUSE_SLOW_VEHICLE 26
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#define DENM_CAUSE_DANGEROUS_END_OF_QUEUE 27
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#define DENM_CAUSE_VEHICLE_BREAKDOWN 91
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#define DENM_CAUSE_POST_CRASH 92
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#define DENM_CAUSE_HUMAN_PROBLEM 93
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#define DENM_CAUSE_STATIONARY_VEHICLE 94
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#define DENM_CAUSE_EMERGENCY_VEHICLE_APPROACHING 95
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#define DENM_CAUSE_HAZARDOUS_LOCATION_DANGEROUS_CURVE 96
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#define DENM_CAUSE_COLLISION_RISK 97
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#define DENM_CAUSE_SIGNAL_VIOLATION 98
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#define DENM_CAUSE_DANGEROUS_SITUATION 99
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typedef struct {
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uint32_t station_id;
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uint16_t sequence_number; // keep constant across repeats of the SAME event; only bump on a genuinely new event
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uint8_t cause_code; // e.g. 94 = stationaryVehicle
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uint8_t sub_cause_code; // 0 = unspecified
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uint8_t station_type; // StationType, e.g. 5 = passengerCar - match geonet_wrap_shb's station_type param
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int32_t latitude_tenmicrodeg; // 1/10 microdegree; 0 = placeholder/unavailable
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int32_t longitude_tenmicrodeg; // 1/10 microdegree; 0 = placeholder/unavailable
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bool terminate; // true = encode this as a Termination(isCancellation) message instead of a normal update
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} denm_fields_t;
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// Encodes a minimal DENM (ItsPduHeader + ManagementContainer +
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// SituationContainer only - no location/alacarte containers) as ASN.1 UPER,
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// per the actual ETSI EN 302 637-3 / TS 102 894-2 ASN.1 modules (fetched
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// from forge.etsi.org, not reconstructed from memory). Returns bytes
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// written, or -1 if buf too small.
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//
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// Two things worth knowing if you're reading this against the modules
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// yourself: ManagementContainer, SituationContainer, and CauseCode are all
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// declared with a trailing "..." (extensible), which means each needs its
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// own leading extension bit in the UPER encoding - easy to miss, and this
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// code got it wrong in an earlier version. Field bit-widths below (e.g.
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// latitude=31 bits, longitude=32 bits, position-confidence fields=12 bits,
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// altitudeValue=20 bits) are derived directly from each type's declared
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// INTEGER constraint range, not assumed to match neighboring fields.
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int denm_encode(const denm_fields_t *f, uint8_t *buf, size_t buf_len);
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#endif
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