11 tar -xjf /cdrom/U-Boot/u-boot-src.tar.bz2
13 Alternatively you can access the current source via the git repository:
14 git://git.kernelconcepts.de/karo-tx-uboot.git master
20 export CROSS_COMPILE=arm-cortexa8-linux-gnueabi-
27 If you want to replace a working U-Boot with a new version, you can
28 load the new U-Boot image via TFTP and program it like any other flash
30 nand erase.part u-boot;nand write.trimffs ${fileaddr} u-boot ${filesize}
32 If you want to revive a bricked module, U-Boot can be downloaded via
33 xmodem protocol over the serial port in recovery boot mode (Jumper ST3
34 on Starterkit-5 baseboard closed). See TX48-U-Boot.pdf for details.
40 Environment variables:
42 cpu_clk <CPU freq [MHz]>
43 touchpanel {tsc2007|edt-ft5x06}
44 otg_mode [host|device|none]
45 video_mode <video mode as understood by Linux fb_find_mode() function>
47 baseboard {stk5-v3|stk5-v5} selects type of baseboard
48 splashimage either: memory address (e.g. ${loadaddr}) of a BMP file
49 to be displayed instead of the built-in logo. Since NAND
50 flash is not accessible in a memory mapped fashion,
51 U-Boot will try to load the contents of the flash
52 partition 'logo.bmp' to the address given with
55 or: the name of an MTD partition, that contains a raw
56 dump of the frame buffer contents which will be loaded
59 splashpos (when 'splashimage' contains a memory address) the
60 position ('x,y') on the screen at which the BMP image
62 Setting splashpos to 'm,m' will center the image on the
65 Note: Some variables (like 'cpu_clk' or 'splashimage') may render the
66 board unbootable if incorrectly set. Therefore these variables
67 will not be evaluated in case the board has been reset through a
68 watchdog reset or a character is available on the serial console
69 during startup to give the user a chance to recover from this