1 How to use U-Boot on NXP i.MXRT1020 EVK
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4 - Build U-Boot for i.MXRT1020 EVK:
7 $ make imxrt1020-evk_defconfig
10 This will generate the SPL image called SPL and the u-boot.img.
12 - Flash the SPL image into the micro SD card:
14 sudo dd if=SPL of=/dev/sdX bs=1k seek=1; sync
16 - Flash the u-boot.img image into the micro SD card:
18 sudo dd if=u-boot.img of=/dev/sdX bs=1k seek=128; sync
24 where 0 means bottom position and 1 means top position (from the
25 switch label numbers reference).
27 - Connect the USB cable between the EVK and the PC for the console.
28 (The USB console connector is the one close the ethernet connector)
30 - Insert the micro SD card in the board, power it up and U-Boot messages should