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U-Boot Customization

This guide explains how to access U-Boot Menuconfig and save the resulting .config file to the meta-bare-metal-router layer, specifically in the recipes-bsp/u-boot/files directory.

Start MenuConfig

To start U-Boot Menuconfig, use the following command:

./menuconfig.sh --u-boot

U-Boot MenuConfig Navigation

Navigating the menuconfig screen involves using the arrow keys, Enter, and Esc. Here are the basic steps for navigating and configuring U-Boot:

  1. Boot Options

    • Navigate to: Top Level Menu -> Boot options
    • Configure boot delays, autoboot commands, and other boot-related options.

  2. Device Drivers

    • Navigate to: Top Level Menu -> Device Drivers
    • Enable and configure various device drivers required for your hardware platform, such as Ethernet, USB, and MMC.

  3. Network Support

    • Navigate to: Top Level Menu -> Network support
    • Configure network settings, including IP addresses, DHCP, and network protocols.

  4. Console and Terminal Settings

    • Navigate to: Top Level Menu -> Console configuration
    • Set up console parameters such as baud rate, UART ports, and console devices.

  5. Environment Settings

    • Navigate to: Top Level Menu -> Environment settings
    • Manage environment variables, storage locations for environment data, and default environment settings.

  6. Security Settings

    • Navigate to: Top Level Menu -> Security settings
    • Enable security features such as secure boot, encryption, and authentication mechanisms.

  7. General Setup

    • Navigate to: Top Level Menu -> General setup
    • General system configurations such as default memory addresses and hardware timers.

U-Boot Configuration File

Once you have configured U-Boot, the menuconfig.sh --u-boot script will save a copy of the .config file to recipes-bsp/u-boot/files/.config.

Script References

  1. menuconfig.sh

    • This script is used to launch the U-Boot menuconfig.

  2. Location of new U-Boot recepie

    • This file is used to append the U-Boot recipe to the Yocto build process

  3. Location of new U-Boot .config

    • The .config file generated by the menuconfig is saved in the meta-bare-metal-router/recipes-bsp/u-boot/files directory.

Additional Tips

  • Save Configuration: After making changes in Menuconfig, make sure to save your new U-Boot configuration. You can save it to the default .config file or specify a different filename.
  • Build U-Boot: Once the configuration is saved, build U-Boot using your build system (e.g., bitbake for Yocto). Make sure to deploy the new U-Boot binary to your target device.
  • Documentation: Refer to the U-Boot Documentation for detailed instructions and advanced configurations.

By following these steps, you can customize U-Boot to support your specific hardware, ensuring optimal performance and compatibility for your embedded system.