1 How to use U-Boot on variscite DART-6UL Evaluation Kit
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4 - Configure and build U-Boot for DART-6UL iMX6ULL:
7 $ make variscite_dart6ul_defconfig
10 This will generate SPL and u-boot-dtb.img images.
13 - The SPL and u-boot-dtb.img images need to be flashed into the micro SD card:
15 $ sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync
16 $ sudo dd if=u-boot-dtb.img of=/dev/mmcblk0 bs=1k seek=69; sync
20 Boot switch position: SW1 -> 0
24 - if bootpart is not enabled by default, to enable under Linux
25 echo 0 >/sys/block/mmcblk1boot0/force_ro
26 mmc bootpart enable 1 1 /dev/mmcblk1boot0
28 - Flash the SPL and u-boot-dtb.img to mmcblk1boot0
29 $ sudo dd if=SPL of=/dev/mmcblk1boot0 bs=1k seek=1; sync
30 $ sudo dd if=u-boot-dtb.img of=/dev/mmcblk1boot0 bs=1k seek=69; sync
34 Boot switch position: SW1 -> 0
37 - Connect the Serial cable to UART0 and the PC for the console.
39 - Insert the micro SD card in the board and power it up.
41 - U-Boot messages should come up.