Step 3: Program the Yocto firmware

The ConnectCore 6 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 6.

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.

Open a serial connection with the following settings:

Parameter

Value

Port

Serial port where the device is connected

Baud rate

115200

Datat 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: ftp://ftp1.digi.com/support/digiembeddedyocto/2.2/r3/images/ccimx6sbc-installer.zip
  2. Decompress the installer zip file.
  3. Save the decompressed files in the root of a FAT-formatted microSD card.
  4. Insert the card in the microSD socket of the ConnectCore 6 SBC.
  5. Reset the device by pressing the reset button on the board. Then immediately press any key in the serial terminal to stop the auto-boot process. The U-Boot bootloader prompt displays:
U-Boot dub-2015.04-r8.3+g0de0373ade (Apr 23 2017 - 22:26:53)
			
CPU: Freescale i.MX6Q rev1.5 1200 MHz (running at 792 MHz)
CPU: Extended Commercial temperature grade (-20C to 105C) at 52C
Reset cause: WDOG
I2C: ready
DRAM: 1 GiB
MMC: FSL_SDHC: 0 (eMMC), FSL_SDHC: 1
In: serial
Out: serial
Err: serial
ConnectCore 6 SOM variant 0x02: Consumer quad-core 1.2GHz, 4GB eMMC, 1GB DDR3, -20/+70C, Wireless, Bluetooth, Kinetis
Board: ConnectCore 6 SBC, version 3, ID 129
Boot device: MMC4
PMIC: DA9063, Device: 0x61, Variant: 0x60, Customer: 0x00, Config: 0x56
Net: FEC [PRIME]
Hit any key to stop autoboot: 0 
=>
  1. Install the firmware into the internal eMMC, executing the following commands:
=> fatload mmc 1 $loadaddr install_linux_fw_sd.scr
=> source $loadaddr

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