SMART Embedded Computing ATCA-F140 Series, Инструкция по установке и эксплуатации

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ATCA-F140 Series Installation and Use (6806800M67S) 113
Chapter 5
U-Boot
5.1 Overview
This product uses the U-Boot, a boot loader software based on the GNU Public License. It
boots the blade and is the first software to be executed on after it is powered on. Its main
functions are:

Initialize the hardware
 Pass boot parameters to the Linux kernel

Starting the Linux kernel
 Update Linux kernel and U-boot images
This section describes U-Boot features and procedures that are specific to the ATCA-F140.
For general information on U-Boot, refer to http://www.denx.de/wiki/U-Boot/WebHome .
5.2 Accessing U-Boot
The U-boot can be accessed using the serial interface connector at the face plate of the
ATCA-F140. To connect, you need a computer with a serial interface connector and a
terminal emulation software such as HyperTerm running on it.
1. Connect the console interface connector of the ATCA-F140 to the serial interface
connector of the computer.
2. Configure the terminal software to use the access parameters that are specified in
U-Boot. By default, the access parameters are as follows:
 Baud rate: 9600

Flow control: XON/XOFF
 PC ANSI

Eight data bits
 No parity

One stop bit
These serial access parameters are the default values. These can be changed from
within U-Boot. The console port of the F140 blade also supports the baud rates of
38400 and 115200. For details refer to the U-boot documentation.