u-boot-2009.11 ported to mini2440

I write down my experience of porting u-boot-2009, hoping it will be helpful to others.

Related reading: u-boot-2009.11 transplantation on mini2440 http://www.linuxidc.com/Linux/2011-03/33687.htm

Environment used:

u-boot: u-boot-2009.11

Ubuntu: ubuntu9.10

Cross-environment: arm-linux-gcc4.3.2

1. Download u-boot-2009.11

U-Boot source code download address http://www.linuxidc.com/Linux/2011-07/38897.htm. Download the u-boot source code provided by other websites, you can decompress it on Windows, but not on Ubuntu.

2. Establish a cross-compilation environment

Download arm-linux-gcc4.3.2, which can be downloaded from the friendly arm official website. After decompression, configure the path, as follows:

1) Modify the environment variables and add the path of the cross compiler to PATH.

Method 1: Modify the /etc/bash.bashrc file (this file is only applicable to the current user)

$sudo gedit /etc/bash.bashrc

Add export PATH=$PATH:/usr/local/arm/4.4.3/bin at the end

Method 2: Modify the /etc/profile file (this file is a system-level environment variable, and the settings in it apply to all users

$sudo gedit /etc/profile

Add export PATH=$PATH:/usr/local/arm/4.4.3/bin at the end

Method 3: Modify the /etc/environment file

$sudo gedit /etc/environment

The original file should be PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin: /usr/games"

Change it to PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/arm/4. 4.3/bin" Save and exit

If you do not add the environment variable above, you need to write out the full path of arm-linux-gcc every time you want to run the program arm-linux-gcc. For example: /usr/local/arm/4.4.3/bin arm-linux-gcc file name - o output file name

This is very troublesome, so add it to the path to let the computer know where the program is.

Make the new environment variables take effect immediately without restarting the computer:

Method 1: $ source /root/.bashrc

Method 2: $ source /etc/profile

Method 3: Log out of the system (if the above is unsuccessful, it is recommended to log out of the system)

3. Follow the steps in the friendly arm u-boot transplantation complete manual.

4. Continue to understand the u-boot code and follow up.