Dbc File Format Documentation -

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:

| 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 | dbc file format documentation

CM_ "BU_ node" "comment"; CM_ "BO_ msgId" "comment"; CM_ "SG_ msgId sigName" "comment"; CAN bit numbering can be or Motorola (big‑endian)

BO_ 200 EngineStatus: 8 ECU_Powertrain SG_ EngineState : 0|4@0+ (1,0) [0|5] "" Gateway,DiagnosticTool SG_ CoolantTemp : 8|8@0+ (1,-40) [-40|215] "degC" Gateway | 0 | | ValueType | + =

BU_: node1 node2 ... ;

BA_DEF_ BU_ “Vendor” STRING; BA_DEF_ BO_ “GenMsgCycleTime” INT 0 65535; BA_DEF_ SG_ “MySignalAttribute” ENUM “Low”,“Medium”,“High”; BA_DEF_DEF_ “AttrName” default_value; Example:

BU_: NODE_NAME_1 NODE_NAME_2 ... NODE_NAME_N Example: