The ConnectCore MP15 Development Kit is shipped without a default operating system loaded. Only the ARM Trusted Firmware, OPTEE, and U-Boot are flashed in the device. This step demonstrates how to install Digi Embedded Yocto in your ConnectCore MP15 Development Kit.

1. Establish a serial connection with your device

Open a serial connection with the device. You can use any serial terminal program such as Tera Term, Minicom, CoolTerm, or HyperTerminal.

PuTTY terminal program is not recommended due to an incompatibility with the USB/serial driver.

Open a serial connection with the following settings:

Parameter Value

Port

Serial port where the device is connected

Baud rate

115200

Data bits

8

Parity

None

Stop bits

1

Flow control

None

2. Download the firmware

To access firmware images, please fill out the following form to provide some information so we can better understand your project needs.

If the form doesn’t load after a few seconds, you may need to refresh the page. Contact Digi Support Services if you are not able to access the firmware images.

3. Program the firmware

There are multiple methods of programming the firmware to the target:

Program the firmware using UUU

  1. Decompress the zip file in a directory of your choice.

  2. Download the latest Universal Update Utility (UUU), a software tool from NXP.

    UUU version should be v1.5.11 or higher.
  3. Place the uuu executable in a directory in your PATH, such as /usr/bin.

  4. Install udev rules to allow any user to run uuu to access the USB port:

    $ sudo sh -c "uuu -udev >> /etc/udev/rules.d/70-uuu.rules"
    $ sudo udevadm control --reload
  5. Connect a micro USB cable to your development PC and the other end to the target USB OTG connector.

  6. Reset the device by pressing the reset button on the board and immediately press any key in the serial terminal to stop the auto-boot process. The U-Boot bootloader prompt displays:

    NOTICE:  CPU: STM32MP157CAC Rev.Z
    NOTICE:  Model: Digi International ConnectCore MP15 Development Kit
    NOTICE:  BL2: v2.6-stm32mp1-r2.1(release):dub-2021.10-r4.2(8fdd4435)
    NOTICE:  BL2: Built : 14:41:33, Sep 14 2023
    NOTICE:  BL2: Booting BL32
    optee optee: OP-TEE: revision 3.16 (43350dda)
    
    
    U-Boot dub-2021.10-r4.2 (Sep 14 2023 - 14:40:08 +0000)
    
    CPU: STM32MP157CAC Rev.Z
    DRAM:  512 MiB
    optee optee: OP-TEE: revision 3.16 (43350dda)
    Clocks:
    - MPU : 650 MHz
    - MCU : 208.878 MHz
    - AXI : 266.500 MHz
    - PER : 24 MHz
    - DDR : 533 MHz
    WDT:   Started with servicing (32s timeout)
    NAND:  512 MiB
    MMC:   STM32 SD/MMC: 1
    In:    serial
    Out:   serial
    Err:   serial
    Model: Digi International ConnectCore MP15 Development Kit
    ConnectCore MP15 SOM variant 0x01: 512 MiB DDR3, Wi-Fi, Bluetooth
      Board version 1
    Boot:  NAND
    Net:   eth0: ethernet@5800a000
    Normal Boot
    Hit any key to stop autoboot:  0
    => 
    Information in the console log may vary.
  7. On the target, in U-Boot, execute the following command:

    => fastboot 0
  8. On your development PC, change to the directory where you extracted the ZIP file:

    $ cd <zip-folder>
  9. Run the install_linux_fw_uuu.sh script with -h parameter to check the syntax:

    $ ./install_linux_fw_uuu.sh -h
    ############################################################
    #           Linux firmware install through USB OTG         #
    ############################################################
    Usage: ./install_linux_fw_uuu.sh [options]
    
      Options:
       -a <atf-filename>      Arm-trusted-firmware filename.
                              Auto-determined by variant if not provided.
       -b                     Activate bootcount mechanism (3 boot attempts).
       -d                     Install firmware on dualboot partitions (system A and system B).
                              (Implies -b).
       -f <fip-filename>      FIP filename.
                              Auto-determined by variant if not provided.
       -h                     Show this help.
       -i <dey-image-name>    Image name that prefixes the image filenames, such as 'dey-image-qt',
                              'dey-image-webkit', 'core-image-base'...
                              Defaults to 'dey-image-webkit' if not provided.
       -n                     No wait. Skips 10 seconds delay to stop script.
       -t                     Install TrustFence artifacts.
  10. To program the default image files (dey-image-webkit):

    $ ./install_linux_fw_uuu.sh

    If your SOM has a U-Boot v2021.10-r3 or older, the install process programs the new U-Boot but fails immediately after booting it. This is due to the reworked NAND partition layout on U-Boots newer than v2021.10-r3. Press Ctrl+C on your host to cancel the script, run fastboot 0 again on the target, and retry.

    For more information, check Storage layout

  11. Once the firmware is installed, the device boots automatically. The default username is root with no password.

Program the firmware using uSD card

  1. Decompress the zip file.

  2. Place the decompressed files in the root of a FAT-formatted microSD card and insert it in the microSD socket of the board.

  3. Reset the device by pressing the reset button on the board and immediately press any key in the serial terminal to stop the auto-boot process. The U-Boot bootloader prompt displays:

    NOTICE:  CPU: STM32MP157CAC Rev.Z
    NOTICE:  Model: Digi International ConnectCore MP15 Development Kit
    NOTICE:  BL2: v2.6-stm32mp1-r2.1(release):dub-2021.10-r4.2(8fdd4435)
    NOTICE:  BL2: Built : 14:41:33, Sep 14 2023
    NOTICE:  BL2: Booting BL32
    optee optee: OP-TEE: revision 3.16 (43350dda)
    
    
    U-Boot dub-2021.10-r4.2 (Sep 14 2023 - 14:40:08 +0000)
    
    CPU: STM32MP157CAC Rev.Z
    DRAM:  512 MiB
    optee optee: OP-TEE: revision 3.16 (43350dda)
    Clocks:
    - MPU : 650 MHz
    - MCU : 208.878 MHz
    - AXI : 266.500 MHz
    - PER : 24 MHz
    - DDR : 533 MHz
    WDT:   Started with servicing (32s timeout)
    NAND:  512 MiB
    MMC:   STM32 SD/MMC: 1
    In:    serial
    Out:   serial
    Err:   serial
    Model: Digi International ConnectCore MP15 Development Kit
    ConnectCore MP15 SOM variant 0x01: 512 MiB DDR3, Wi-Fi, Bluetooth
      Board version 1
    Boot:  NAND
    Net:   eth0: ethernet@5800a000
    Normal Boot
    Hit any key to stop autoboot:  0
    => 
    Information in the console log may vary.
  4. Check the U-Boot version on the console boot banner. If the version is dub-2021.10-r1.1, set the following script variable and save it. You can skip this step if you have a newer U-Boot version:

    => setenv install_linux_fw_sd 'if load mmc 1 ${loadaddr} install_linux_fw_sd.scr;then source ${loadaddr};fi;'
    => saveenv
  5. To install the default firmware images (dey-image-webkit) into the internal NAND, run the following command:

    => run install_linux_fw_sd

    To program other images, set the variable image-name to the DEY image name (such as dey-image-webkit or core-image-base) before running the script.

    => setenv image-name core-image-base
    => run install_linux_fw_sd

    If your SOM has a U-Boot v2021.10-r3 or older, the install process programs the new U-Boot but fails immediately after booting it. This is due to the reworked NAND partition layout on U-Boots newer than v2021.10-r3. Execute run install_linux_fw_sd again on the target to retry the command with the new U-Boot.

    For more information, check Storage layout

  6. Once the firmware is installed, the device boots automatically. The default username is root with no password.

    During installation, error messages appear when the installation process attempts to override MAC addresses. These messages are expected.

    ## Resetting to default environment
    oldval: 00:40:9D:7D:17:9A  defval: 00:04:f3:ff:ff:fa
    ## Error: Can't overwrite "ethaddr"
    himport_r: can't insert "ethaddr=00:04:f3:ff:ff:fa" into hash table
    oldval: 00:40:9D:7D:17:9B  defval: 00:04:f3:ff:ff:fb
    ## Error: Can't overwrite "eth1addr"
    himport_r: can't insert "eth1addr=00:04:f3:ff:ff:fb" into hash table
    oldval: 00:40:9D:7D:17:9C  defval: 00:04:f3:ff:ff:fc
    ## Error: Can't overwrite "wlanaddr"
    himport_r: can't insert "wlanaddr=00:04:f3:ff:ff:fc" into hash table
    oldval: 00:40:9D:7D:17:9D  defval: 00:04:f3:ff:ff:fd
    ## Error: Can't overwrite "btaddr"
    himport_r: can't insert "btaddr=00:04:f3:ff:ff:fd" into hash table

Program the firmware using USB mass storage

Follow these steps to install Yocto in the device:

  1. Decompress the zip file.

  2. Place the decompressed files in the root of a FAT-formatted USB mass storage and insert it in the USB host connector of the board.

  3. Reset the device by pressing the reset button on the board and immediately press any key in the serial terminal to stop the auto-boot process. The U-Boot bootloader prompt displays:

    NOTICE:  CPU: STM32MP157CAC Rev.Z
    NOTICE:  Model: Digi International ConnectCore MP15 Development Kit
    NOTICE:  BL2: v2.6-stm32mp1-r2.1(release):dub-2021.10-r4.2(8fdd4435)
    NOTICE:  BL2: Built : 14:41:33, Sep 14 2023
    NOTICE:  BL2: Booting BL32
    optee optee: OP-TEE: revision 3.16 (43350dda)
    
    
    U-Boot dub-2021.10-r4.2 (Sep 14 2023 - 14:40:08 +0000)
    
    CPU: STM32MP157CAC Rev.Z
    DRAM:  512 MiB
    optee optee: OP-TEE: revision 3.16 (43350dda)
    Clocks:
    - MPU : 650 MHz
    - MCU : 208.878 MHz
    - AXI : 266.500 MHz
    - PER : 24 MHz
    - DDR : 533 MHz
    WDT:   Started with servicing (32s timeout)
    NAND:  512 MiB
    MMC:   STM32 SD/MMC: 1
    In:    serial
    Out:   serial
    Err:   serial
    Model: Digi International ConnectCore MP15 Development Kit
    ConnectCore MP15 SOM variant 0x01: 512 MiB DDR3, Wi-Fi, Bluetooth
      Board version 1
    Boot:  NAND
    Net:   eth0: ethernet@5800a000
    Normal Boot
    Hit any key to stop autoboot:  0
    => 
    Information in the console log may vary.
  4. Check the U-Boot version on the console boot banner. If the version is dub-2021.10-r1.1, set the following script variable and save it. You can skip this step if you have a newer U-Boot version:

    => setenv install_linux_fw_usb 'usb start;if load usb 0 ${loadaddr} install_linux_fw_usb.scr;then source ${loadaddr};fi;'
    => saveenv
  5. To install the default firmware images (dey-image-webkit) into the internal NAND, run the following command:

    => run install_linux_fw_usb

    To program other images, set the variable image-name to the DEY image name (such as dey-image-webkit or core-image-base) before running the script.

    => setenv image-name core-image-base
    => run install_linux_fw_usb

    If your SOM has a U-Boot v2021.10-r3 or older, the install process programs the new U-Boot but fails immediately after booting it. This is due to the reworked NAND partition layout on U-Boots newer than v2021.10-r3. Execute run install_linux_fw_usb again on the target to retry the command with the new U-Boot.

    For more information, check Storage layout

  6. Once the firmware is installed, the device boots automatically. The default username is root with no password.

    During installation, error messages appear when the installation process attempts to override MAC addresses. These messages are expected.

    ## Resetting to default environment
    oldval: 00:40:9D:7D:17:9A  defval: 00:04:f3:ff:ff:fa
    ## Error: Can't overwrite "ethaddr"
    himport_r: can't insert "ethaddr=00:04:f3:ff:ff:fa" into hash table
    oldval: 00:40:9D:7D:17:9B  defval: 00:04:f3:ff:ff:fb
    ## Error: Can't overwrite "eth1addr"
    himport_r: can't insert "eth1addr=00:04:f3:ff:ff:fb" into hash table
    oldval: 00:40:9D:7D:17:9C  defval: 00:04:f3:ff:ff:fc
    ## Error: Can't overwrite "wlanaddr"
    himport_r: can't insert "wlanaddr=00:04:f3:ff:ff:fc" into hash table
    oldval: 00:40:9D:7D:17:9D  defval: 00:04:f3:ff:ff:fd
    ## Error: Can't overwrite "btaddr"
    himport_r: can't insert "btaddr=00:04:f3:ff:ff:fd" into hash table