Dbc File Format Documentation _best_ Info

BO_ msgId msgName : dlc transmitterNode ; SG_ sigName : startBit|len@byteOrder sign (factor,offset) [min|max] "unit" receivers ;

VAL_ MessageID SignalName Value1 "Text1" Value2 "Text2" ...; Example: dbc file format documentation

| Field | Description | Example | |-------|-------------|---------| | SignalName | Unique within the message. | EngineSpeed | | StartBit | Bit index where the signal begins. CAN bit numbering can be or Motorola (big‑endian) – see below. | 24 | | Length | Number of bits (1–64). | 16 | | ByteOrder | 0 = Intel (little‑endian, LSB first), 1 = Motorola (big‑endian, MSB first). | 0 | | ValueType | + = unsigned, - = signed (two’s complement). | + | | Factor | Scaling factor (float). Physical = (Raw * Factor) + Offset. | 0.125 | | Offset | Offset (float). | 0 | | Min | Minimum physical value (optional, but brackets required). | 0 | | Max | Maximum physical value (optional). | 8000 | | Unit | String, may be empty "" . | "rpm" | | Receivers | One or more node names from BU_: . If none, use Vector__XXX . | TCU_EMS,BCM | BO_ msgId msgName : dlc transmitterNode ; SG_

BA_ “Vendor” BU_ ECU_EMS “Bosch”; BA_ “GenMsgCycleTime” BO_ 100 50; BA_ “MySignalAttribute” SG_ 100 EngineSpeed “High”; Maps numeric raw values to human‑readable strings for a signal. Syntax: | 24 | | Length | Number of bits (1–64)

BA_ “AttrName” OBJECT_TYPE object_id value; Examples:

BA_DEF_ objectType "attrName" attrType ; BA_DEF_DEF_ "attrName" defaultValue ; BA_ "attrName" objectType objId value ;