Embedded System - Raspberry Pi

 

 

 

Kernel Compile

 

This tutorial is based on a Raspberry Pi Official Document titled as Kernel Building. Main purpose of this tutorial is to confirm that the procedure on the official document works for the Raspberry Pi that I have and to show some more details (like the screen capture for the result of each step).

 

 

 

Hardware / Software Enviroment

 

The Hardware/Software(OS) configuration that I used for this tutorial is as follows :

 

 

 

 

Local Builidng : Compling on Raspberry Pi

 

 

Step 0 : Basic Prep

 

I updated apt to the latest version as shown below.

 

I am going to download the source code in the following directory.

 

 

 

Step 1 : Install Git and Build Dependencies

 

The command for this installation is as follows :

    $ sudo apt install git bc bison flex libssl-dev make

Following is the result of installation. Hit 'Y' (yes) if it ask any question

 

 

 

Step 2 : Download the source code

 

The command for downloading the source code is as follows.

    $ git clone --depth=1 https://github.com/raspberrypi/linux

Following is the result of the download

 

 

you would see a new directory 'linux' is created as the result of the download.

 

 

Just for checking, go to the 'linux' directory and see what kind of contents are there.

 

 

 

NOTE : From this point on, all the procedure is done in the directory /home/pi/linux

 

Step 3 : Define a variable KERNEL

 

In case of Raspberry Pi 3+ that I am using, you need to do define the variable KERNEL as follows.

    $ KERNEL=kernel7

 

 

Step 4 : Apply the default Build Configuration

 

Command for this step is as follows :

    $ make bcm2708_defconfig

The result of this step would be as follows (NOTE : this is only the initial part of the result.. you would see much longer result than this)

 

 

Step 5 : Compile the code

 

Start compile with the following command (NOTE : This step takes the longest time in the whole process. In my case, it took around 2 hours).

    $ make -j4 zImage modules dtbs

 

 

Step 6 : Install Module

 

Install the module with the following command

    $ sudo make modules_install

 

 

Step 7 : Copy the device trees

 

Do 3 copy operations to copy all the device tree related files (For the details of Raspberry Pi device tree, refer to this official document).

    $ sudo cp arch/arm/boot/dts/*.dtb /boot/

    $ sudo cp arch/arm/boot/dts/overlays/*.dtb* /boot/overlays/

    $ sudo cp arch/arm/boot/dts/overlays/README /boot/overlays/

 

 

 

 

 

 

 

 

 

 

 

 

Step 8 : Copy the kernel image file

 

 

 

 

 

Step 9 : Reboot and Check

 

 

 

 

Reference :

 

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