I have followed build procedure for Linux kernel, Prepared SD card for booting kernel Image.but I need some information Regarding settings environmental variables for u-boot for imxulevk board using SD card.i need to boot kernel from SD card.
Hello Naga Prasad,
One of the outputs from baking an image is a .sdcard file that contains the image ready to be copied to an sd card using the dd command in Linux. Did you already perform this step?
$ sudo dd if=<image name>.sdcard of=/dev/sd<partition> bs=1M && sync
To change the environmental variables for u-boot you need to boot the board and use the debug UART to reach u-boot and change the environment setup. You can see how to do this in detail in section 4.7 “Running Linux OS on the target” from the i.MX Linux User’s Guide that is included as part of the BSP documentation.
I hope this helps!