擦除uboot的参数

您可以看OTG烧写脚本里面，关于EMMC烧写uboot的参数，文件是在OKMX6UL-C(eMMC&Nand版)用户资料-2018.04\Linux\工具\OTG\mfgtools\Profiles\Linux\OS Firmware里面的ucl2-xml.xml文件，emmc的uboot烧写部分
<!-- burn uboot -->


<CMD body="$ dd if=/dev/zero of=/dev/mmcblk%mmc% bs=1k seek=384 conv=fsync count=129" type="push" state="Updater">clear u-boot arg</CMD>

<!-- access boot partition -->


<CMD body="$ echo 0 > /sys/block/mmcblk%mmc%boot0/force_ro" type="push" state="Updater">access boot partition 1</CMD>

<CMD ifdev="MX6UL" file="files/linux/u-boot-emmc.imx" body="send" type="push" state="Updater">Sending u-boot.bin</CMD>

<CMD body="$ dd if=$FILE of=/dev/mmcblk%mmc%boot0 bs=512 seek=2" type="push" state="Updater">write U-Boot to sd card</CMD>

<CMD body="$ echo 1 > /sys/block/mmcblk%mmc%boot0/force_ro" type="push" state="Updater"> re-enable read-only access </CMD>

<CMD body="$ echo 8 > /sys/block/mmcblk%mmc%/device/boot_config" type="push" state="Updater">enable boot partion 1 to boot</CMD>

按照此参数试一下