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This article describes flashing U-Boot firmware image with a Linux Host using Universal Update Utility (hereinafter UUU).

Admolition note.png Follow the Universal Update Utility instructions to install and setup the UUU tool on a host Linux station.

Getting Recovery U-Boot Firmware Image

unzip -d /path/to/iot-gate-imx8plus-firmware

Determining RAM size

Determine the correct DRAM size of the IOT-GATE-IMX8PLUS according to the label located on the bottom side of the device. DRAM size is encoded in the unit's D option.
Use the table below to determine DRAM_CONF value:

Product D Option DRAM_CONF
D1 d1d8
D2 d2d4
D4 d2d4
D8 d1d8

Flashing U-Boot Firmware

  • Power off the IOT-GATE-IMX8PLUS / SBC-IOT-IMX8PLUS device.
  • Connect the IOT-GATE-IMX8PLUS / SBC-IOT-IMX8PLUS micro-USB Programming (PROG) port with the host Linux station USB port using a standard micro-USB cable.
  • Power on the IOT-GATE-IMX8PLUS / SBC-IOT-IMX8PLUS device via the main DC input.
  • Issue the following commands on the host Linux station:
uuu -lsusb
Expected output:
uuu (Universal Update Utility) for nxp imx chips -- libuuu_1.5.4-0-gbdea8bd

Connected Known USB Devices
        Path     Chip    Pro     Vid     Pid     BcdVersion
        1:533    MX865   SDPS:   0x1FC9 0x0146   0x0002
  • Flash U-Boot Firmware. Replace <DRAM_CONF> with the actual value:
sudo uuu -d -v -b emmc /path/to/iot-gate-imx8plus-firmware/flash.bin.<DRAM_CONF>
  • Make sure the deployment is completed with no error

After Installation

  • Turn off the device
  • Disconnect the micro-USB cable from the device's programming port
  • Turn on the device
  • Press a key to prevent a possible autoboot and get into the U-Boot command prompt
  • Restore default boot environment, save it and reset device:
env default -a ; saveenv ; reset