Kontron AM4150 U-Boot Bootloader Manuel d'utilisateur télécharger pdf (Page 41)

AM4150 U-Boot Bootloader U-Boot Usage

ID 1052-5678, Rev. 1.0 Page 41

P R E L I M I N A R Y

6.3.2 Contacting the Server

In addition, to be able to transfer files from a tftp server to a module, the module’s IP address

(environment variable “ipaddr”) and the IP address of the server must be set (environment vari-

able “serverip”). Alternatively, it is possible to use the “dhcp” or “bootp” commands.

They can be set using the “setenv” command. Please note that these settings are lost after a

reset. To retain the environment permanently, use the command “saveenv”, which saves the

complete environment to flash.

To transfer a file from a tftp server to memory, the “tftpboot” command is used, for example:

6.4 Using SD Cards

SD cards are supported (read only) with the “ext2” or “fat” file system.

In both cases, the card must be rescanned first.

After that, the contents can be verified with:

in case of the ext2 file system, or with

in case of the fat file system.

To load a file into memory, the commands “ext2load” or “fatload” can be used, for example:

which loads the file “kernel.bin” from the SD card to memory address 0x100000.

tftpboot 100000 filename

mmc rescan 0

ext2ls mmc 0

fatls mmc 0

ext2load mmc 0 100000 kernel.bin

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Kontron AM4150 U-Boot Bootloader Manuel d'utilisateur Page 41