Method and system for preventing loss of trip data in vehicle

摘要

Disclosed herein is a method for preventing a loss of trip data of a vehicle during a substantial instantaneous voltage drop in a vehicle cluster. In the method, the trip data calculated by a processor of a trip computer are stored in a clear region of a memory and the trip data stored in the clear region are backed up in a nonvolatile region of the memory when new trip data is generated. The processor collects the trip data backed up in the nonvolatile region to rewrite the trip data in the clear region after a substantially instantaneous voltage drop occurs.

主权项

1. A method for preventing a loss of trip data of a vehicle upon a substantially instantaneous voltage drop in a vehicle cluster, the method comprising:
calculating, by a processor of a trip computer, trip data from a plurality of signals; storing, by the processor, the calculated trip data in a clear region of a memory and backing up the trip data stored in the clear region into a nonvolatile region of the memory when new trip data is generated; and collecting, by the processor, the trip data backed up in the nonvolatile region to rewrite the trip data in the clear region after a substantially instantaneous voltage drop occurs, wherein the storing of the trip data further includes:
calculating, by the processor, a checksum from the trip data,storing, by the processor, the checksum in the clear region, andbacking up, by the processor, the trip data stored in the clear region and the checksum calculated therefrom into the nonvolatile region when a new checksum calculated from the generated new trip data is substantially different from the checksum stored in the clear region.