Kontron AM4140 U-Boot Bootloader Uživatelský manuál stáhnout pdf (Strana 45)

AM4140 U-Boot Bootloader U-Boot Usage

ID 1052-0281, Rev. 1.0 Page 45

P R E L I M I N A R Y

6.8 Getting Help

U-Boot was configured with support for longhelp. This means that online help is available for

every command while working with the system. To access the online help, enter “?” or “help” at

the console prompt. This will show an overview over all available commands. To get specific

help, enter “? <command/command group” or “help <command/command group”.

For example to get help on the “saves” command enter “? saves”.

To get help on the mmc command group enter “? mmc”.

=> ? saves

saves - save S-Record file over serial line

Usage:

saves [ off ] [size] [ baud ]

- save S-Record file over serial line with offset 'off', size

'size' and

baudrate 'baud'

=> ? mmc

mmc - MMC sub system

Usage:

mmc read <device num> addr blk# cnt

mmc write <device num> addr blk# cnt

mmc rescan <device num>

mmc part <device num> - lists available partition on mmc

mmc list - lists available devices

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Kontron AM4140 U-Boot Bootloader Uživatelský manuál Strana 45