New version U-boot2012.04.01 transplantation (I) (JZ2440-S3C2440)

New version U-boot2012.04.01 transplantation (I) (JZ2440-S3C2440)

u-boot download address: http://www.denx.de/wiki/U-Boot/

The u-boot version we want to download here is: u-boot-2012.04.01tar.bz2

The download steps are as follows:

After downloading, test it under Linux:

1. Preliminary test

Decompress: tar xjf u-boot-2012.04.01.tar.bz2

Enter the directory: cd u-boot-2012.04.01/

cd u-boot-2012.04.01/

Configure: make smdk2410_config

Compile: make

Finally, a compilation error will occur: "arm-linux-ld" is because the version of the cross-compiler is too low.

Use the "arm-linux-gcc -v" command to check the version of the cross compiler (built-in cross compiler). The version is too low.

Next, replace the previous arm-linux-gcc-3.4.5-glibc-2.3.6.tar.bz2 with arm-linux-gcc-4.3.2.tar.bz2.

(1) Place arm-linux-gcc-4.3.2.tar.bz2 in the /work/tools directory, and then create a /tmp directory to view its contents.

Command: mkdir tmp

tar xjf arm-linux-gcc-4.3.2.tar.bz2 -C tmp/

(2) Switch to the directory of the previous compressed package and decompress it to the root directory /.

Command: cd /work/tools/

sudo tar xjf arm-linux-gcc-4.3.2.tar.bz2 -C /

(3) Setting environment variables

You can view the path, command: echo $PATH

Set environment variables through the export command (reset each time you start the computer)

Change directory: cd /usr/local/arm/4.3.2/bin/

Check the path: echo $PATH

Configure environment variables:

export PATH=/usr/local/arm/4.3.2/bin/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

Then check the cross compiler version: arm-linux-gcc -v

Setting environment variables (permanent method)

Modify the configuration file: sudo vim /etc/environment

The original environment variable

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/work/tools/gcc-3.4.5-glibc-2.3.6/bin"

Change to: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/arm/4.3.2/bin/"

To take effect: source /etc/environment

2. Continue to compile the previous u-boot-2012.04.01

Re-enter the u-boot-2012.04.01 directory

Execute the command: make distclean to clear the previously unfinished compilation files.

Reconfigure: make smdk2410_config 

Recompile: make

After the compilation is completed, no error is reported.

The compilation is successful and the u-boot.bin file is generated. Follow the previous method to burn u-boot. However, the size of the generated u-boot.bin is 462kB, which is too large.

The generated u-boot.bin cannot be run after being burned to the development board. The following is to analyze its startup process.