IOT-GATE-iMX8 and SBC-IOT-iMX8: U-Boot: Recovery
Revision as of 07:00, 9 August 2022 by imported>Uri.mashiach
Introduction
The following scenarios can lead to a bricked device:
- U-Boot update failure.
- U-Boot update with corrupted image.
In that case U-Boot recovery is needed.
Creating The Recovery SD Card
- Download the U-Boot recovery image archive.
- Extract the image archive:
unzip iot-gate-imx8_firmware-recovery-image.zip
- Use a Linux workstation and an SD card reader to write the U-Boot recovery image on an SD card.
- Replace /dev/sdX with the actual SD card device:
sudo dd if=iot-gate-imx8_firmware-recovery_2022-08-02.img of=/dev/sdX bs=1M status=progress
Flashing The Device U-Boot
- Install the recovery SD card in the IOTG-ACC-M2SD module.
- The IOTG-ACC-M2SD module is included in the evaluation kit.
- Power off the IOT-GATE-iMX8/SBC-IOT-iMX8 unit.
- If a secondary storage module is installed, remove the module from socket P14.
- Install the IOTG-ACC-M2SD module in socket P14.
- Install jumper E1.
- Power on the IOT-GATE-iMX8/SBC-IOT-iMX8 unit.
- Load the U-Boot image to the RAM.
u-boot=> mmc partconf 2 0 1 0 u-boot=> load mmc 1 ${loadaddr} iot-gate-imx8-firmware
- Make shure that the image was loaded:
1666004 bytes read in 153 ms (10.4 MiB/s)
- Write the U-Boot image to the internal storage:
u-boot=> mmc dev 2 1; mmc write ${loadaddr} 0x42 0xE00
- Power off the IOT-GATE-iMX8/SBC-IOT-iMX8 unit.
- Remove jumper E1.
- Power on the IOT-GATE-iMX8/SBC-IOT-iMX8 unit.