Framecairn
Map CAN signal bits, decode known raw frames, retain factor, bounds, ownership, units, and validation fixtures without a hardware connection.
Focused field tools
Record bus, arbitration ID, format, direction, sender, cycle, and DLC.
State the exact numbering and byte-order convention before reviewing start bits.
Verify Intel and Motorola signal layout with a known raw fixture.
Apply sign extension only after extracting the intended bit width.
Keep raw, factor, offset, physical unit, precision, and range visible.
Record selector signal, values, and mutually exclusive layouts.
Framecairn decodes manually recorded raw values under the bit positions and factors you provide; it does not connect to a vehicle or device, transmit frames, validate safety, or replace approved network definitions. Confirm endianness, signedness, multiplexing, scaling, units, and fixtures with the system owner.