When the flashing is complete, all 4 USRx LEDs will be lit solid. The following is an example of a U-Boot sequence log and warning messages in case you do not press the boot button. Only when holding down the boot button (USER 2 button), it will search for a bootloader on the SD card. By default the RBL (ROM bootloader) of BeagleBone Black boots from the internal eMMC. If S2 is pressed during power-up the boot sequence is changed to Action 1 - I have followed all the steps as per instruction in getting started guide and fundamental Components and build a custom image for u-boot.img and MLO and copied it to boot partition (FAT) of the SD Card and try to boot but the same thing is happening like previous. What is the Boot Loader Process? Power off the board and remove the SD card. Note: Most of the devices use U-Boot within the boot loader process. Furthermore, the concept can apply to Raspberry PI or another piece of device, should the device use U-Boot during the boot loader process. My example uses Beaglebone Black as an embedded device of choice. After doing some reading, it looks as though it might be saving environment on a "special" eMMC boot partition (which is not the same as the FAT16 partition 1 I created to store MLO and u-boot.img). I'm having some trouble understanding the location where U-Boot saves its environment for BeagleBone Black.
#U BOOT FOR BEAGLEBONE BLACK DRIVER#
Kernel loads required driver modules and initializes root file system. I am facing a problem with Beaglebone black. Plug in the USB cable between the mini USB port on the BeagleBone and the PC. In the document, Boot Modes: BBB can boot from USB Port. Once the kernel is built, copy to your sd card like this: This will cause u-boot to stop, and you will get a prompt.
The BBB i could run with a mainline kernel and mainline u-boot and a stock Debian/armhf.
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