I begin embedded Linux with BeagleBone Black. I use crosstool-NG to build U-boot. Result is file MLO and u-boot.img, which was wrtite into SD cards.
Then, I insert SD cards into BeagleBone Black to test.
I follow this decription https://elinux.org/Building_for_BeagleBone#U-Boot
But, it don't show #U-boot.
Note that i just test uboot, not kernel image and root file system. And a uboot image is available on the onboard eMMC.
How do I fix it?
Thank you!
Related
I have built an image for the TQ Systems STKa8x Evaluation board with an i.MX8 QuadMax using the yocto project. The resulting image does not boot on the device. Can anyone help me interpret the warnings and errors occuring in the serial console output when trying to boot?
I think the the machine configuration might be wrong? The device hardware is ok, becaus the device boots using the included sd card.
Did you flash your Yocto image in your emmc or SDcard ? Here it seams that there is no partition table in your emmc which is normally embedded inside Linux image. It is more likely that the flash did not succeed.
Plus you can see warning from u-boot that he cannot load the device tree. Check your repository build/tmp/deploy/image/machine/*.dtb
You should also check if your linux image and device tree is flashed in the correct address.
Solved: The problem was caused by the SD card. I have used this SD card https://de.transcend-info.com/embedded/product/embedded-memory-cards/usd230i. Using another one solved my problem.
Hello I am new in Linux kernel and I want to load i2c as a module in beaglebone black so how I can do this I search something regarding this (https://www.ddcutil.com/kernel_module/) but I don't understand how I do this help me
I have my raspberry pi zero, and during development I spend a lot of time to eject-inject SD card and re-flash it. SD card image is prepared in Buildroot, so it includes boot partition with kernel, device tree overlays and partition with rootfs.
Is there simpler way to re-flash SD card? For example via network? I know that U-boot can load kernel via tftp, but if I need not only kernel, but whole image(device tree overlays are extremely important)?
Use TFTP to load the kernel image, and NFS to mount the root filesystem over the network.
Am stuck in making a bootable SD-Card.
I have gpt_both0.bin, hyp.mbn, NON-HLOS.bin, rpm.mbn, sbl1.mbn, sec.dat, tz.mbn, emmc_appsboot.mbn, boot.img and rootfs.img files.
When i flash all of 'em into eMMC (using fastboot command) the board boots easily and we dont face any problems. But now i also have to make a bootable SD-Card to boot board via SD-card.
Can anyone please explain how can i achieve this !
I am using Ubuntu-14.04 on my PC.
I accidently modified uEnv.txt file located in eMMC of my Beaglebone black. Now the board is not booting. I can not even see BBB for serial connection from terra term. How can I get access to the board? If I can just access to uboot I could reflash or run it using nfs. Any ideas?
You can boot via normal microSD card as described here:
burn a bootable image on your microSD card
insert this card
power up your BBB while holding USER/BOOT button
once in Linux - repair your uEnv.txt on eMMC