BootLoader management method

Abstract

The invention discloses a BootLoader management method. The method comprises the steps of configuring Flash storage space, customizing instruction flow, updating and loading AppFlash and BootFlash and locating a running mode. According to the BootLoader management method, free disassembly can be truly achieved, a code loading interface uses a fixed CAN channel, through the fixed CAN channel, the facts that the startup code BootFlash is loaded in the application code AppFlash and the application code AppFlash is loaded in the startup code BootFlash can be achieved, and the seamless joint and skip of the two code update modes can be achieved; meanwhile, by utilizing the fixed CAN channel, the reusage of another multiple modes such as standardization, diagnosis, self-testing, debugging and monitoring except the BootLoader mode can be achieved, and the resource use efficiency of hardware can be improved.

Description

technical field [0001] The invention relates to a management method of a BootLoader, in particular to a management method of a BootLoader for real-time updating and loading application codes by using a general-purpose CAN bus on a vehicle, and belongs to the field of new energy vehicle vehicle control system software. Background technique [0002] Today, BootLoader is widely used in automotive control systems. It is a bootloader that uses communication media such as SCI, SPI, and CAN to guide the processor and load application software without using a debugging emulator. Its function is similar to that of a PC. BIOS in the machine. [0003] The existing BootLoader can load the application code without disassembling the controller, which facilitates the interaction between on-site developers and remote developers, ensures the secrecy of the source code, and protects the layout and hiding of components Convenience is provided. [0004] However, there are still many problems ...

AI Technical Summary

Problems solved by technology

[0004] However, there are still many problems in the existing BootLoader, the specific problems are as follows: 1. When it is necessary to optimize the boot function of the BootLoader itself, it is necessary to reload the BootFlash through TBDML, etc. Destruction, and at the same time requires professional technicians to use special equipment to carry out on-site debugging operations, the whole process is very complicated and troublesome; 2. When loading and updating the AppFlash, it is necessary to consider loading and updating the BootFlash at the same time; 3. In the vehicle During the running process, if the BootFlash needs to be loaded and updated, but due to personal carelessness, the whole vehicle may run with high voltage, and the high voltage wiring harness and related components may be affected during the loading of the program; 4 .In the Flash of the new energy vehicle controller with BootLoader function, due to the existence of BootFlash and AppFlash at the same time, for the test vehicle installed with the vehicle controller for the first time, there is an abnormality in a certain part of the vehicle without knowing it, resulting in the failure of the application code. In the case of running, it is impossible to know whether the program has loaded the application code at this time; 5. During the process of BootLoader loading code, due to improper use or accidental power failure, etc., it is easy to cause loading exceptions and cause the controller to fail

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