The ConnectCore 6UL is shipped without a default operating system loaded. Only U-Boot is flashed in the device. This step demonstrates how to install Yocto in your ConnectCore 6UL.

1. Establish a serial connection with your device

Before you start programming the firmware, you must open a serial connection with the device. You can use any serial terminal program such as Tera Term, Minicom, CoolTerm, or HyperTerminal.

Due to an incompatibility between the USB/serial driver and the PuTTY terminal program, you must use another serial terminal program such as Tera Term, Minicom, CoolTerm, or HyperTerminal.

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. Program the firmware

Once you have established the serial connection, you can start the firmware update process. Follow these steps to install Yocto in the device:

  1. Download the firmware images from this location: https://ftp1.digi.com/support/digiembeddedyocto/2.4/r3/images/ccimx6ulstarter-installer.zip

  2. Decompress ccimx6ulstarter-installer.zip.

  3. Place the decompressed files in the root of a FAT-formatted microSD card and insert it in the microSD socket of the ConnectCore 6UL SBC Express (bottom side).

  4. 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 dub-2017.03-r2.1-git+g96bce8e (Oct 26 2018 - 09:51:55 +0000)

CPU:   Freescale i.MX6UL rev1.1 528 MHz (running at 396 MHz)
CPU:   Industrial temperature grade (-40C to 105C) at 55C
Reset cause: POR
I2C:   ready
DRAM:  256 MiB
MCA:   HW_VER=1  FW_VER=1.02
PMIC:  PFUZE3000 DEV_ID=0x30 REV_ID=0x11
NAND:  256 MiB
MMC:   FSL_SDHC: 0
In:    serial
Out:   serial
Err:   serial
Model: Digi International ConnectCore 6UL SBC.
ConnectCore 6UL SOM variant 0x02: Industrial Ultralite 528MHz, 256MB NAND, 256MB DDR3, -40/+85C, Wireless, Bluetooth
Board: ConnectCore 6UL SBC Pro, version 3, ID 135
Boot device:  NAND
Net:   FEC0 [PRIME]
Hit any key to stop autoboot:  0
=>

  1. Install the firmware into the internal NAND, executing the following command:

    => run install_linux_fw_sd

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

Once you have established the serial connection, you can start the firmware update process. Follow these steps to install Yocto in the device:

  1. Download the firmware images from this location: https://ftp1.digi.com/support/digiembeddedyocto/2.4/r3/images/ccimx6ulsbc-installer.zip

  2. Decompress ccimx6ulsbc-installer.zip.

  3. Place the decompressed files in the root of a FAT-formatted microSD card and insert it in the microSD socket of the ConnectCore 6UL SBC Pro (bottom side).

  4. 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 dub-2017.03-r2.1-git+g96bce8e (Oct 26 2018 - 09:51:55 +0000)

CPU:   Freescale i.MX6UL rev1.1 528 MHz (running at 396 MHz)
CPU:   Industrial temperature grade (-40C to 105C) at 55C
Reset cause: POR
I2C:   ready
DRAM:  256 MiB
MCA:   HW_VER=1  FW_VER=1.02
PMIC:  PFUZE3000 DEV_ID=0x30 REV_ID=0x11
NAND:  256 MiB
MMC:   FSL_SDHC: 0
In:    serial
Out:   serial
Err:   serial
Model: Digi International ConnectCore 6UL SBC.
ConnectCore 6UL SOM variant 0x02: Industrial Ultralite 528MHz, 256MB NAND, 256MB DDR3, -40/+85C, Wireless, Bluetooth
Board: ConnectCore 6UL SBC Pro, version 3, ID 135
Boot device:  NAND
Net:   FEC0 [PRIME]
Hit any key to stop autoboot:  0
=>

  1. Install the firmware into the internal NAND, executing the following command:

    => run install_linux_fw_sd

  2. 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