iMX6 Rex Ultra Recovery

Description

Recovery procedure consists of following steps:

• Loading bootloader binary over USB OTG interface
• Flashing bootloader over Ethernet
• Erasing bootloader environment
• Reseting module

Recommended SW

• Mfg tools
• Serial adapter with terminal application
• TFTP server
• DHCP server (optional)

Configuration

Updating bootloader

Download U-Boot image:

cd /srv/tftp/imx6/
wget http://downloads.voipac.com/files/iMX6_Rex_Development_kit/module/software/uboot/binaries/u-boot-imx6-rexultra-2.4.imx

Use the downloaded file to update the bootloader:

setenv ipaddr 192.168.0.150
setenv serverip 192.168.0.1

mw.b 0x10800000 0xFF 0x80000;if tftp 0x10800000 imx6/u-boot-imx6-rexultra-2.4.imx; then if sf probe 2:2; then sf erase 0x0 0x80000;sf write 0x10800000 0x400 0x7fc00; fi; fi
reset

Creating bootable SD card

Follow these steps to prepare the SD card