Vehicle dual control chip system and its auxiliary control chip program update method

Abstract

The present invention discloses an auxiliary control chip program update method for a vehicle onboard double-control-chip system. The method comprises: connecting an IO control pin of a main control chip to a reset pin of an auxiliary MCU; setting a communication ID identification number for communication between an upper computer and a lower computer; defining a ROM area where the BOOT and the program of the auxiliary control chip are located; downloading a to-be-updated program to the corresponding ROM area; integrating transfer functions of a CAN communication tool and an SPI communication tool of the main control chip into ESP system functions; connecting the upper computer with a whole vehicle CAN network by using the CAN communication tool; ensuring that a session response between the upper computer and the lower computer and a key checking mechanism meet a whole vehicle CAN network standard; an auxiliary control chip program file being a standard S19 format file; and performing, by the main control chip, data transfer processing, upper computer processing, and auxiliary control chip BOOT processing. The present invention further discloses a vehicle onboard double-control-chip system. According to the update method and system provided by the present invention, existing hardware resources are used without adding extra costs and without increasing complexity of whole vehicle network design, thereby facilitating operations of maintainers.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a vehicle-mounted dual control chip system (ECU). The invention also relates to a method for updating programs of an auxiliary control chip (MCU) in a vehicle-mounted dual control chip system (ECU). Background technique [0002] The vehicle dual control chip architecture system (ECU) is realized by the main control chip (MCU), auxiliary control chip (MCU) and digital communication hardware module. Among them, the role of the auxiliary control chip is mainly to monitor the working status of the main control chip and to perform safety redundancy detection on the collection of some key information. When the function of the main control chip or the functional architecture of the ECU changes, it is often required to be able to upgrade the application program (APP) of the auxiliary control chip online in the vehicle environment to adapt to the change of the system functional architecture. ...

AI Technical Summary

Problems solved by technology

Since the main control chip has already used a CAN driver to communicate with the CAN network of the vehicle; the disadvantage of this method is that two CAN drivers are required, which increases the number of CAN network nodes

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