openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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#pragma once
#include <vector>
#include <map>
#include <unordered_map>
#include "common_dbc.h"
#include <capnp/serialize.h>
#include "cereal/gen/cpp/log.capnp.h"
#define MAX_BAD_COUNTER 5
// Helper functions
unsigned int honda_checksum(unsigned int address, uint64_t d, int l);
unsigned int toyota_checksum(unsigned int address, uint64_t d, int l);
void init_crc_lookup_tables();
unsigned int volkswagen_crc(unsigned int address, uint64_t d, int l);
unsigned int pedal_checksum(uint64_t d, int l);
uint64_t read_u64_be(const uint8_t* v);
uint64_t read_u64_le(const uint8_t* v);
class MessageState {
public:
uint32_t address;
unsigned int size;
std::vector<Signal> parse_sigs;
std::vector<double> vals;
uint16_t ts;
uint64_t seen;
uint64_t check_threshold;
uint8_t counter;
uint8_t counter_fail;
bool parse(uint64_t sec, uint16_t ts_, uint8_t * dat);
bool update_counter_generic(int64_t v, int cnt_size);
};
class CANParser {
private:
const int bus;
const DBC *dbc = NULL;
std::unordered_map<uint32_t, MessageState> message_states;
public:
bool can_valid = false;
uint64_t last_sec = 0;
CANParser(int abus, const std::string& dbc_name,
const std::vector<MessageParseOptions> &options,
const std::vector<SignalParseOptions> &sigoptions);
void UpdateCans(uint64_t sec, const capnp::List<cereal::CanData>::Reader& cans);
void UpdateValid(uint64_t sec);
void update_string(std::string data, bool sendcan);
std::vector<SignalValue> query_latest();
};
class CANPacker {
private:
const DBC *dbc = NULL;
std::map<std::pair<uint32_t, std::string>, Signal> signal_lookup;
std::map<uint32_t, Msg> message_lookup;
public:
CANPacker(const std::string& dbc_name);
uint64_t pack(uint32_t address, const std::vector<SignalPackValue> &signals, int counter);
};