Multi-hardware adaptation method based on Linux

Abstract

The invention discloses a multi-hardware adaptation method based on Linux, relating to the technical field of automotive electronics. In the Bootloader stage, a vehicle-mounted entertainment SOC processor of a vehicle-mounted entertainment system can obtain hardware information of a vehicle-mounted MCU processor; parameters in the kernel can be modified according to different hardware information;the function of dynamically adapting to hardware is achieved; the vehicle-mounted entertainment SOC processor is communicated with the vehicle-mounted MCU processor through IPCL in the Bootloader stage; hardware information of different vehicle types in the vehicle-mounted MCU processor end is obtained; an equipment tree FDT according to different vehicle models in the Bootloader stage is modified; and finally, dynamic adaptation is realized in a Linux Kernel driver according to different hardware parameters. According to the method, the requirement for multi-hardware adaptation can be effectively met, convenient, flexible and non-inductive configuration is achieved, meanwhile, the probability of communication errors is reduced, the configuration of the communication protocol is simple, communication can be achieved in different starting stages, and good compatibility is achieved for different platforms.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a Linux-based multi-hardware adaptation method. Background technique [0002] With the continuous development of the automobile industry, the same car model can be divided into multiple versions according to different configurations. The in-vehicle entertainment system on different versions needs to make corresponding different device identification and driver loading according to different hardware devices. There are currently two main technologies to achieve different hardware adaptations. The first is to make differences according to different models during the coding stage. For example, the Android system can use the lunch command to select different platform compilation options, and then use the make command Execute the compilation command, so that the compiled code can already adapt to the current platform device. The second is to use the same code to obtain ...

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Problems solved by technology

[0002] With the continuous development of the automobile industry, the same car model can be divided into multiple versions according to different configurations. Different versions of the car entertainment system need to make corresponding different device identification and driver loading according to different hardware devices. There are currently two main technologies to achieve different hardware adaptations. The first is to make differences according to different models during the coding stage. For example, the Android system can use the lunch command to select different platform compilation options, and then use the make command Execute the compilation command, so that the compiled code can already adapt to the current platform device. The second is to use the same code to obtain different hardware information during the startup phase, and then dynamically configure the hardware through the code. For example, The hardware parameters can be written into the memory, and the bootloader stage reads the parameter information in the memory, and then modifies the bootargs parameters, and uses the bootargs to pass different parameters to the kernel. The kernel loads different devices through different bootargs parameters, but the first method is not flexible enough. It can only be distinguished by compiling different codes. It cannot dynamically adapt the hardware, and cannot meet the requirements of software and hardware platforms. The second solution can be dynamically adapted by using code, but the method of passing parameters through bootargs is compared. Outdated, and there are restrictions on the modification of bootargs parameters. It can only adapt to parameters such as memory size and baud rate, so it cannot better meet the requirements of dynamic adaptation.

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