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comma body: add checksum state (#613) 

* add checksum state for comma body dbc

* ohh these are per byte, nice
This commit is contained in:
Shane Smiskol 2022-05-13 15:55:56 -07:00 committed by GitHub
parent c53965dfbd
commit 490ddedc59
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1 changed files with 3 additions and 9 deletions
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12
can/dbc.cc
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@ -68,6 +68,8 @@ ChecksumState* get_checksum(const std::string& dbc_name) {
s = new ChecksumState({8, -1, 0, -1, true, SUBARU_CHECKSUM});
} else if (startswith(dbc_name, "chrysler_")) {
s = new ChecksumState({8, -1, 7, -1, false, CHRYSLER_CHECKSUM});
} else if (startswith(dbc_name, "comma_body")) {
s = new ChecksumState({8, 4, 7, 3, false, PEDAL_CHECKSUM, PEDAL_COUNTER});
}
return s;
}
@ -81,7 +83,7 @@ void set_signal_type(Signal& s, uint32_t address, ChecksumState* chk, const std:
s.type = chk->checksum_type;
} else if (s.name == "COUNTER") {
DBC_ASSERT(chk->counter_size == -1 || s.size == chk->counter_size, "COUNTER is not " << chk->counter_size << " bits long");
DBC_ASSERT(chk->counter_start_bit == -1 || s.start_bit % 8 == chk->counter_start_bit, "COUNTER starts at wrong bit");
DBC_ASSERT(chk->counter_start_bit == -1 || (s.start_bit % 8) == chk->counter_start_bit, "COUNTER starts at wrong bit");
DBC_ASSERT(chk->little_endian == s.is_little_endian, "COUNTER has wrong endianness");
s.type = chk->counter_type;
}
@ -95,14 +97,6 @@ void set_signal_type(Signal& s, uint32_t address, ChecksumState* chk, const std:
DBC_ASSERT(s.size == 4, "PEDAL COUNTER is not 4 bits long");
s.type = PEDAL_COUNTER;
}
} else if (address == 0x250) {
if (s.name == "CHECKSUM") {
DBC_ASSERT(s.size == 8, "BODY CHECKSUM is not 8 bits long");
s.type = PEDAL_CHECKSUM;
} else if (s.name == "COUNTER") {
DBC_ASSERT(s.size == 4, "BODY COUNTER is not 4 bits long");
s.type = PEDAL_COUNTER;
}
}
}