96 lines
1.9 KiB
Python
96 lines
1.9 KiB
Python
import os
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import subprocess
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from cffi import FFI
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can_dir = os.path.dirname(os.path.abspath(__file__))
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libdbc_fn = os.path.join(can_dir, "libdbc.so")
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subprocess.check_call(["make", "-j3"], cwd=can_dir) # don't use all the cores to avoid overheating
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ffi = FFI()
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ffi.cdef("""
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typedef struct {
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const char* name;
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double value;
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} SignalPackValue;
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typedef struct {
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uint32_t address;
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const char* name;
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double default_value;
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} SignalParseOptions;
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typedef struct {
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uint32_t address;
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int check_frequency;
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} MessageParseOptions;
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typedef struct {
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uint32_t address;
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uint16_t ts;
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const char* name;
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double value;
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} SignalValue;
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typedef enum {
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DEFAULT,
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HONDA_CHECKSUM,
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HONDA_COUNTER,
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TOYOTA_CHECKSUM,
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PEDAL_CHECKSUM,
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PEDAL_COUNTER,
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VOLKSWAGEN_CHECKSUM,
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VOLKSWAGEN_COUNTER,
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} SignalType;
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typedef struct {
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const char* name;
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int b1, b2, bo;
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bool is_signed;
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double factor, offset;
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SignalType type;
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} Signal;
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typedef struct {
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const char* name;
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uint32_t address;
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unsigned int size;
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size_t num_sigs;
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const Signal *sigs;
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} Msg;
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typedef struct {
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const char* name;
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uint32_t address;
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const char* def_val;
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const Signal *sigs;
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} Val;
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typedef struct {
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const char* name;
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size_t num_msgs;
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const Msg *msgs;
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const Val *vals;
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size_t num_vals;
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} DBC;
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void* can_init(int bus, const char* dbc_name,
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size_t num_message_options, const MessageParseOptions* message_options,
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size_t num_signal_options, const SignalParseOptions* signal_options);
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void can_update_string(void *can, const char* dat, int len);
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size_t can_query_latest(void* can, bool *out_can_valid, size_t out_values_size, SignalValue* out_values);
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const DBC* dbc_lookup(const char* dbc_name);
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void* canpack_init(const char* dbc_name);
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uint64_t canpack_pack(void* inst, uint32_t address, size_t num_vals, const SignalPackValue *vals, int counter);
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""")
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libdbc = ffi.dlopen(libdbc_fn)
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