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added new mazda with TI2 #6

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16 changes: 16 additions & 0 deletions can/common.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,22 @@ unsigned int chrysler_checksum(uint32_t address, const Signal &sig, const std::v
return ~checksum & 0xFF;
}

unsigned int mazda_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d) {
uint8_t checksum = 0;
if (address == 0x220U) {
checksum = 0x2aU;
}
if (address == 0x249U){
checksum = 0x53U;
}
// Simple XOR over the payload, except for the byte where the checksum lives.
for (int i = 0; i < 7; i++) {
checksum += d[i];
}
return checksum;
}


// Static lookup table for fast computation of CRCs
uint8_t crc8_lut_8h2f[256]; // CRC8 poly 0x2F, aka 8H2F/AUTOSAR
uint16_t crc16_lut_xmodem[256]; // CRC16 poly 0x1021, aka XMODEM
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1 change: 1 addition & 0 deletions can/common.h
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Expand Up @@ -30,6 +30,7 @@ unsigned int honda_checksum(uint32_t address, const Signal &sig, const std::vect
unsigned int toyota_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d);
unsigned int subaru_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d);
unsigned int chrysler_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d);
unsigned int mazda_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d);
unsigned int volkswagen_mqb_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d);
unsigned int xor_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d);
unsigned int hkg_can_fd_checksum(uint32_t address, const Signal &sig, const std::vector<uint8_t> &d);
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1 change: 1 addition & 0 deletions can/common.pxd
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Expand Up @@ -23,6 +23,7 @@ cdef extern from "common_dbc.h":
SUBARU_CHECKSUM,
CHRYSLER_CHECKSUM
HKG_CAN_FD_CHECKSUM,
MAZDA2019_CHECKSUM,

cdef struct Signal:
string name
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1 change: 1 addition & 0 deletions can/common_dbc.h
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Expand Up @@ -41,6 +41,7 @@ enum SignalType {
SUBARU_CHECKSUM,
CHRYSLER_CHECKSUM,
HKG_CAN_FD_CHECKSUM,
MAZDA2019_CHECKSUM,
};

struct Signal {
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2 changes: 2 additions & 0 deletions can/dbc.cc
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Expand Up @@ -66,6 +66,8 @@ ChecksumState* get_checksum(const std::string& dbc_name) {
s = new ChecksumState({8, -1, 7, -1, false, CHRYSLER_CHECKSUM, &chrysler_checksum});
} else if (startswith(dbc_name, "comma_body")) {
s = new ChecksumState({8, 4, 7, 3, false, PEDAL_CHECKSUM, &pedal_checksum});
} else if (startswith(dbc_name, "mazda_2019")) {
s = new ChecksumState({8, 8, 0, 0, true, MAZDA2019_CHECKSUM, &mazda_checksum});
}
return s;
}
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