11 tar -xjf /cdrom/U-Boot/u-boot-src.tar.bz2
16 export CROSS_COMPILE=arm-cortexa8-linux-gnueabi-
23 If you want to replace a working U-Boot with a new version, you can
24 load the new U-Boot image via TFTP and program it like any other flash
26 nand erase.part u-boot;nand write.trimffs ${fileaddr} u-boot ${filesize}
28 If you want to revive a bricked module, U-Boot can be downloaded via
29 xmodem protocol over the serial port in recovery boot mode (Jumper ST3
30 on Starterkit-5 baseboard closed). See TX48-U-Boot.pdf for details.
36 Environment variables:
38 cpu_clk <CPU freq [MHz]>
39 touchpanel {tsc2007|edt-ft5x06}
40 otg_mode [host|device|none]
41 video_mode <video mode as understood by Linux fb_find_mode() function>
43 baseboard {stk5-v3|stk5-v5} selects type of baseboard
44 splashimage memory address of a BMP file to be displayed instead of
45 the built-in logo. Since NAND flash is not accessible in
46 a memory mapped fashion, U-Boot will try to load the
47 contents of the flash partition 'logo' to the address
48 given with 'splashimage'.
50 Note: Some variables (like 'cpu_clk' or 'splashimage') may render the
51 board unbootable if incorrectly set. Therefore these variables
52 will not be evaluated in case the board has been reset through a
53 watchdog reset or a character is available on the serial console
54 during startup to give the user a chance to recover from this