Texas Instruments DVEVM, Руководство по началу работы, Страница: 56 / 70

Alternate Boot Methods
A-12
A.5 Alternate Boot Methods
The default configuration for the DVEVM is to boot from flash with the file
system on the board’s hard drive. The following are alternate ways you
may want to boot the board:
❏
TFTP boot with hard drive file system (Section A.5.2)
❏
Flash boot with NFS file system (Section A.5.3)
❏
TFTP boot with NFS file system (Section A.5.4)
Section 4.3.6 discusses booting in PAL video mode vs. NTSC video
mode.
The subsections that follow show the environment variable settings used
to enable each boot method.
To boot in one of these modes, follow these steps:
1) Power on the DVEVM board, and abort the automatic boot sequence
by pressing a key in the console window (Section 2.2).
2) Set the environment variables indicated in the following subsections
for the boot mode you want to use.
3) If you want to use these settings as the default in the future, save the
environment:
EVM # saveenv
4) Boot the board using the settings you have made:
EVM # boot
A.5.1 Booting from Flash Using Board’s Hard Drive File System
This is the default, out-of-the-box boot configuration.
To boot in this mode, set the following parameters after you abort the
automatic boot sequence:
EVM # setenv bootcmd bootm 0x2050000
EVM # setenv bootargs mem=120M console=ttyS0,115200n8
root=/dev/hda1 rw noinitrd ip=dhcp