topic Re: imx8mq problem creating bootable sdcard image in i.MX Processors

imx8mq problem creating bootable sdcard image

asolochek — Fri, 27 Sep 2019 15:29:29 GMT

Hello,

I have an imx8mqevk and am able to successfully write and boot the demo image from a flash card. However, I am unable to boot my custom made image. The only .sdcard image generated by bitbake is .rootfs.sdcard, which which seems to suggest it isn't actually the entire sdcard image, which would be consistent with it apparently not having a bootloader on it.

Some earlier attempts at this did result in a sdcard with the expected partition table, and windows would mount the bootloader partition (although it did complain about the FAT filesystem having some errors, which it corrected to it's satisfaction), but my current build does not mount at all. The partition table looks reasonable, but windows silently ignores the bootloader partition, and pops up the expected "do you want to format this drive" dialog for the ext4 partition.

Anyway, I am building this in a docker container on windows, using ubuntu 16.04. I'm following the instructions from the i.MX Yocto user guide, Doc number IMXLXYOCTOUG, Rev L4.9.88_2.0.0-ga, 05/2018.

I have all the packages required, plus some that aren't mentioned in the doc, such as locales, sudo, and python3, and I'm running bitbake like this:

$ MACHINE=imx8mqevk DISTRO=fsl-imx-xwayland source setup-environment build

$ MACHINE=imx8mqevk DISTRO=fsl-imx-xwayland source fsl-setup-release.sh -b build

$ bitbake fsl-image-qt5-validation-imx

What am I missing?

I'm attaching my dockerfile as reference.

Thank you.

Re: imx8mq problem creating bootable sdcard image

Bio_TICFSL — Tue, 01 Oct 2019 14:55:37 GMT

Hello Aaron,

Its all right your bitbake. You need a format your sdcard and put the switches of the board to boot from SD. Then you need to burn your *.sdcard to your sd with dd command in linux. the you will have to insert in board and that its.

Regards

Re: imx8mq problem creating bootable sdcard image

asolochek — Thu, 03 Oct 2019 22:33:55 GMT

Hi,

I have the fuses set correctly and have written and booted from the SD card when I flash the pre-built demo image onto the card. However none of the builds I have done result in an SD card image that boots. The problem doesn't seem to be with linux, but rather the problem is with uboot. With the images I have built I do not get any output on the serial console at all. There is something going wrong with uboot very early in the boot process.

I have even done a diff of the first 1M of the SD card when it has my image and the demo image on it, and apart from size of the second partition being different, they are identical, so I am really at a loss as to how to further debug this.

Re: imx8mq problem creating bootable sdcard image

cgong — Tue, 15 Oct 2019 14:11:53 GMT

I use a tool called balena Etcher on Windows 7 to flash the SD card with success. Maybe you can try.

Re: imx8mq problem creating bootable sdcard image

asolochek — Tue, 15 Oct 2019 16:21:10 GMT

I am also using Etcher on windows. There is something wrong with the uboot in the image that is being built.

Re: imx8mq problem creating bootable sdcard image

asolochek — Thu, 31 Oct 2019 21:59:03 GMT

I don't know the root cause of this problem, but the guide I was following was having me build rocko. When I switched to sumo the sdcard images booted without a problem.