• 1.1. Abstract
• 1.2. Dual-BIOS Architecture
• 1.2.1. NOR Boot
• 1.2.2. NAND Boot
• 1.3. Command Line Interface
• 1.3.1. Command Line Interface Initial Steps
• 1.3.2. Basic Command Set
• 1.4. U-Boot Environment Variables
• 1.5. Using U-Boot Download Firmware to NAND
• 1.5.1. Using Linux Download U-Boot and Linux
• 1.5.2. Using U-Boot Download U-Boot and Linux
• 1.6. Update and Restore Root Filesystem

1.1. Abstract

This is the Embedian U-Boot and firmware upgrade Guide to Embedded ARM9-Based Single Board Computers and Embedded Box Computers.

The document describes how to configure, build and use the firmware Das U-Boot (typically abbreviated as just "U-Boot") for Embedded ARM9-Based Computers. If your Embedian board or computers does not run U-boot, please see the manual for your supported bootloader. (All of our ARM9-Based products run u-boot.)

U-Boot has several advantages. It is easy to port to new architectures, new processors and new boards. Also, it is easy to debug from serial console output. U-Boot has many configurable features and command. And it is small in footprint and very reliable.

The document applies to all APC series single board computers and EBC series box computers.

This is not an exhaustive manual for U-boot. If you are looking for a detailed reference manual or command index, you should consult the main U-boot manual at Here.