U-Boot bootloader allows you to update the firmware of your device over Ethernet. U-Boot uses the TFTP protocol to get the firmware images from a TFTP server running on your computer and programs them onto the eMMC of the device.

Once you have the TFTP server running on your computer, you can start the update process:

Get the Yocto firmware images:

.bin for your hardware variant. See Hardware variants.

.boot.vfat

.recovery.vfat

.rootfs.ext4

After building the Yocto firmware, you can find the image files inside the project directory at:

/tmp/deploy/images/

You can download Digi provided pre-built images from:

For ConnectCore 8X SBC Pro:

https://ftp1.digi.com/support/digiembeddedyocto/2.6/r3/images/ccimx8x-sbc-pro/xwayland/

Copy the images in your TFTP server’s exposed folder (typically /tftpboot).

Connect the board to your host computer. See Step 2 - Set up the hardware for instructions.

Open a serial connection to the serial port to which the device is connected. Use the following settings:

Port: Serial port where your ConnectCore board is attached

Baud rate: 115200

Data Bits: 8

Parity: None

Stop Bits: 1

Flow control: None

Reset the device (press the Reset button on the board) and immediately press a key in the serial terminal to stop the auto-boot process. You will be stopped at the U-Boot bootloader prompt:

Configure the network settings of the device by doing one of the following:

Get a dynamic IP address from a DHCP server by running the following commands:

Configure a static IP address, where a.b.c.d is the IP address of your device:

Configure the IP address of the machine where the TFTP server is running and save the configuration as follows, where w.x.y.z is your machine IP address where the TFTP server is running:

Update the U-Boot image (optional):

Execute the following command to update the U-Boot image:

Reset the board to boot into the recently updated U-Boot, and press any key to stop the autoboot process.

Reset the U-Boot environment to default values (this will not reset protected variables like the MAC address). To do so, issue this command:

Configure the network and TFTP settings on your device again and save the configuration.

Configure the partition of the eMMC for holding Yocto images by running these commands:

Update the boot image by executing this command:

Update the root file system image by issuing this command:

Update the recovery image by executing this command:

You can format the update partition or directly boot the new firmware:

To format the update partition, run the following commands. They boot in recovery mode to format the partition and then boots the device normally with the new firmware:

If the update partition is already formatted or you want to preserve its contents, boot the device with the firmware you have just programmed: