Flashing Guide for Yocto OS

To build OS follow Building TruxOS from Source Code

Once the image is ready the resulting image is located in tmp/deploy/images/imx8mq-trux-q01/

The build results are as follows:

Custom Flashing #

The IMAGE contains U-Boot, the Linux image and device trees, and the rootfs.
If flexibility is not required the image can be installed on the SD card with one command.
Carry out the following command to copy the SD card image to the SD/MMC card. Change sdX below to match the one used
by the SD card.

to check for SD card run

$ ls /dev

without connecting SD card.

rerun the above command after connecting SD card and spot the additional sdX.

Same can be done using

$ sudo fdsik -l

search for size of sd card and note for sdX

To flash the sd card run the following command and replace X with your sd card.

$ cd ~/CodeSetup
$ sudo MACHINE=imx8mq-trux-q01 sources/meta-trucrux/scripts/trux_mk_yocto_sdcard/trux-create-yocto-sdcard.sh < options > /dev/sdX

OPTIONS :
-h Display help message
-s Only show partition sizes to be written, without actually write them
-a Automatically set the rootfs partition size to fill the SD card
-r Select alternative rootfs for recovery images (default: /tmp/deploy/images/imx8mq-trucrux/fsl-image-gui-imx8mq-trucrux.*)

Generally -a option is used for automatic flashing. Below is the example for automatic flashing with SD card “b”.

$ sudo MACHINE=imx8mq-trux-q01 sources/meta-trucrux/scripts/trux_mk_yocto_sdcard/trux-create-yocto-sdcard.sh -a /dev/sdb

Once flashing is done insert SD card in device and turn device ON and check for boot logs on serial port (ttymxc0).

NOTE: Refer Quick Start Guide before Turning on the device 

Flashing SD card image to eMMC #

Once the device is booted successfully you can then copy SD card image to device eMMC (internal storage). To copy SD card image to eMMC open device terminal and run the following commands.

$ cd /usr/bin/

$ ./install_yocto.sh -u

once the image is copied successfully reboot the device by removing SD card.