Difference between revisions of "iMX6 TinyRex Lite U-Boot"
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Latest revision as of 08:03, 24 April 2022
U-Boot is a bootloader responsible for hardware initialisation, loading and booting Linux kernel. It is also used for module flashing.
Build
Set toolchain
Export toolchain variables for every related terminal session.
Initial steps
Create working directory
mkdir -pv ~/workdir/imx6/bootloader/
U-Boot v2015.04
Download and extract source code
cd ~/workdir/imx6/bootloader/ git clone -b uboot-imx-v2015.04 --single-branch https://github.com/voipac/uboot-imx uboot-imx-v2015.04-rex cd uboot-imx-v2015.04-rex
Compile
Output file is called u-boot.imx. All the compiled images are intended for production usage.
Compile for SD3 and Linux/Yocto
cd ~/workdir/imx6/bootloader/uboot-imx-v2015.04-rex make distclean make mx6tinyrexlite_config make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- cp -av u-boot.imx /srv/tftp/imx6/u-boot-imx6-tinyrexlite.imx
Compile for SPI1 and Linux/Yocto
cd ~/workdir/imx6/bootloader/uboot-imx-v2015.04-rex make distclean make mx6tinyrexliterecovery_config make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- cp -av u-boot.imx /srv/tftp/imx6/u-boot-imx6-tinyrexliterecovery.imx
How to Flash a new version
Flash Normal image into SD3
sudo dd if=u-boot-imx6-tinyrex*.imx of=/dev/sdc bs=1k seek=1 skip=0 oflag=dsync
U-Boot v2014.10
Download and Extract source code
cd ~/workdir/imx6/bootloader/ git clone -b uboot-imx-v2014.10 --single-branch https://github.com/voipac/uboot-imx uboot-imx-v2014.10-rex cd uboot-imx-v2014.10-rex
Compile
Output file is called u-boot.imx. The compiled image is intended for production usage.
Compile for Linux/Yocto
cd ~/workdir/imx6/bootloader/uboot-imx-v2014.10-rex make distclean make mx6tinyrexlite_config make cp -av u-boot.imx /srv/tftp/imx6/u-boot-imx6-tinyrexlite.imx
How to Flash a new version
Flash Normal image into SD3
sudo dd if=u-boot-imx6-tinyrex*.imx of=/dev/sdc bs=1k seek=1 skip=0 oflag=dsync
Configure
Manually erase configuration
env default -f -a saveenv reset
Manual boot options
Manually boot from SD3
mw.l 0x020d8040 0x00003040; mw.l 0x020d8044 0x10000000; reset
Change display resolution
setenv video "video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB24,bpp=32" saveenv