Copyright ©
WIN Enterprises, Inc. All Rights Reserved.
Dec., 2014
Chapter 4. U-Boot Reference Manual
38
Note:
If bootdelay is set to 0, the autoboot happens immediately after
This command reads file bootfilename from device dev, partition partition
of the USB flash disk into the RAM address loadAddress. Device and
partition are given as a number (0, 1, 2...).
If no partition is specified, partition 1 is assumed.
4.12.3 Booting images in RAM
After the image is transferred to RAM, you can boot it in following
command.
◆
For Linux images:
where loadAddress is the address in RAM at which the image resides.
4.13 Automatic booting
If U-Boot is not interrupted after the delay established in
bootdelay
, the
automatic boot process takes place. Automatic booting consists of running
what is specified in the
bootcmd
environment variable.
In other words, automatic booting has the same effect as doing the
following examples:
If, for example, if you want to automatically boot a Linux kernel image from
eMMC flash, set
bootcmd
like this:
U-Boot starts. To stop the process and enter the monitor, press a key as
soon as the first U-Boot output lines appear.
