On-board recording system
A system includes a first device and a second device connected via an on-board network. In a case where a driving assistance function is selectively installed on a vehicle, the first device transmits repeatedly a CAN frame having a predetermined CAN-ID from start of the vehicle to stop of the vehicle. The second device receives a CAN frame having a CAN-ID uniquely set for a function with regard to the vehicle. And the second device is configured to: (i) record to both a first recording region and a second recording region of a memory in a case where it is determined that the CAN-ID included in the received CAN frame is the predetermined CAN-ID; and (ii) record only to the second recording region in a case where it is not determined that the CAN-ID included in the received CAN frame is the predetermined CAN-ID.
1. A system comprising:
a first device comprising a first processor and a first memory and being configured to transmit repeatedly a CAN frame having a predetermined CAN-ID from start of the vehicle to stop of the vehicle; and
a second device connected with the first device via an on-board network and comprising:
a second memory having a first recording region and a second recording region;
a transceiver configured to receive a CAN frame having a CAN-ID uniquely set for a function which is selectively installed on the vehicle; and
a second processor configured to:
(i) determine repeatedly whether the CAN-ID included in the received CAN frame is the predetermined CAN-ID;
(ii) record to both the first recording region and the second recording region in a case where it is determined that the CAN-ID included in the received CAN frame is the predetermined CAN-ID; and
(iii) record only to the second recording region in a case where it is not determined that the CAN-ID included in the received CAN frame is the predetermined CAN-ID.
2. The system according to claim 1 , wherein
the first device outputs to the on-board network a control command associated with activation of a driving assistance function, and
the CAN frame comprises the control command.
3. The system according to claim 1 , wherein
the predetermined CAN-ID is uniquely given to a driving assistance function.
4. The system according to claim 1 , wherein
when it is determined that the CAN-ID included in the received CAN frame is the predetermined CAN-ID, the second processor does not subsequently determine whether the CAN-ID included in the received CAN frame is the predetermined CAN-ID.
5. The system according to claim 1 , wherein:
if the vehicle is a gasoline engine vehicle, start of the vehicle comprises turn-on of an ignition key and stop of the vehicle comprises turn-off of the ignition key; and
if the vehicle is an electric vehicle, start of the vehicle comprises start-up of an electronic control unit that performs coordinated control for the entire vehicle and stop of the vehicle comprises stop of the electronic control unit.