Embedded module TQMaRZG2x - YOCTO Linux BSP documentation

The Image can be simply written to the SD Card by using the dd shell command in Linux:

$ cd <path to your image>
$ sudo dd if=tq-image-weston-tqmarzg2n_b-mbarzg2x-<build Timestamp>.rootfs.wic of=/dev/sdc bs=1M conv=fsync #Assuming the SD card is assigned to /dev/sdc

To identify the SD card in Linux the shell command dmesg can be used:

1. Open a new terminal
2. Execute the following command without plugged SD Card

    $ dmesg | tail -n 15

3. Insert SD Card and wait a few seconds
4. Run the command from step two again

$ dmesg | tail -n 15 
 #plug in SD Card into the reader
$ dmesg | tail -n 15 

A good approach to update the firmare components U-Boot,Linux kernel and devicetree in a running system it to load them from a tftp server.
This process requires a running TFTP server, please see the following page how to setup TFTP Server. After setting up the TFTP server, the binaries to be updated must be copied into the TFTP directory.

1. Setup the Starterkit to boot from eMMC or SD
2. Connect the kit to the network with TFTP server supplying the binaries via ethernet on connector ETH0 (X26)
3. Power up the system and interrupt the boot process in U-Boot

Hit any key to stop autoboot:  0
=>

3. Setup the ethernet interface:

Set network settings manually

Set network settings using DHCP

4. Set U-Boot variable mmcdev according to the drive you want to write to.

=> setenv mmcdev <device_number>

5. Set the file name of the binary to update in U-Boot :

• For U-Boot update: ⇒ setenv uboot <filename>
  e.g. uboot.bin
• For devicetree update: ⇒ setenv fdt_file <filename>
  e.g. fr8a774b1-tqmarzg2n_b-mbarzg2x.dtb
• For Linux kernel update: ⇒ setenv image <filename>
  e.g. Image

6. Perform Update by running the update command:

SD Card

• U-Boot update:

  => run update_uboot_sd

• Device Tree update:

  => run update_fdt_sd 

• Kernel update:

  => run update_kernel_sd

eMMC

• U-Boot update:

  => run update_uboot_mmc

• Device Tree update:

  => run update_fdt_mmc

• Kernel update:

  => run update_kernel_mmc