The prebuilt ConnectCore image includes support for the ConnectCore Cloud Services demo.

  1. Establish a serial connection with your device

  2. Download the firmware

  3. Program the firmware

1. Establish a serial connection with your device

Before you can establish the serial connection, you may need to run a setup script if your ConnectCore 8M Nano Development Kit is revision 4 or higher and you are running Linux. See Run serial console setup script for more information.

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

Download the firmware images from the following location: https://ftp1.digi.com/support/digiembeddedyocto/4.0/r5/images/ccimx8mn-dvk/ccimx8mn-dvk-installer.zip

3. Program the firmware

Digi recommends you use the Universal Update Utility (UUU) through a USB connection to your development PC to program the images.

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

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

    UUU version should be 1.5.11 or higher.

  2. Place the uuu executable in a directory in your PATH, such as /usr/bin.

  3. 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

  1. Connect a micro USB cable to your development PC and the other end to the target USB recovery connector.

  2. 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:

    U-Boot SPL dub-2020.04-r6.1 (Sep 19 2023 - 07:18:57 +0000)
DDRINFO: start DRAM init
DDRINFO: DRAM rate 3000MTS
DDRINFO:ddrphy calibration done
DDRINFO: ddrmix config done
Normal Boot
Trying to boot from BOOTROM
image offset 0x0, pagesize 0x200, ivt offset 0x0
NOTICE:  BL31: v2.4(release):lf-5.10.72-2.2.3-2-gb91c6a890
NOTICE:  BL31: Built : 07:19:22, Sep 19 2023


U-Boot dub-2020.04-r6.1 (Sep 19 2023 - 07:18:57 +0000)

CPU:   i.MX8MNano Quad rev1.0 1400 MHz (running at 1200 MHz)
CPU:   Industrial temperature grade (-40C to 105C) at 36C
Reset cause: POR
DRAM:  1 GiB
MCA:   HW_VER=1  FW_VER=1.01
MMC:   FSL_SDHC: 1, FSL_SDHC: 0
In:    serial
Out:   serial
Err:   serial
Model: Digi ConnectCore 8M Nano Development Kit
ConnectCore 8M Nano SOM variant 0x01: 1 GiB LPDDR4, Wi-Fi, Bluetooth, MCA, Crypto-auth
  Board version 3, ID undefined
Boot:  MMC2

 BuildInfo:
  - ATF b91c6a8
  - U-Boot dub-2020.04-r6.1

flash target is MMC:0
Net:   eth0: ethernet@30be0000
Fastboot: Normal
Normal Boot
Hit any key to stop autoboot:  0
=>
    Information in the console log may vary.

  3. On the target, in U-Boot, execute the following command:

    => fastboot 0

  4. On your development PC, change to the directory where you extracted the ZIP file:

    $ cd <zip-folder>

  5. Program the image files:

    $ ./install_linux_fw_uuu.sh

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

    Remove the micro USB cable from the recovery connector of the ConnectCore 8M Nano Development Kit. The USB port will not connect if a cable is connected to the recovery of the ConnectCore 8M Nano Development Kit. See USB interfaces on the ConnectCore 8M Nano.

While the recommended boot method is eMMC, you can also boot the image from a microSD card using the *.sdcard image file on the downloaded ZIP file. See Boot from microSD card for instructions on programming a microSD card and booting from it.

You must use a microSD with a minimum capacity of 8 GB.