Use the procedure documented below to install the U-Boot firmware to the SD Card for boot on the NXP i.MX RT1024 EVK board. Having completed the installation, the i.MX will run U-Boot as a primary firmware on next reset / power on.

Please note that the installation will erase files previously installed on your micro SD Card and install the U-Boot image instead.

Here is the procedure:

1. On a Linux PC, plug in a micro SD Card, either directly or using an USB-to-SD card converter. Any SD/SDHC Card should work.16 MB or more in density is sufficient.
2. Find out a /dev/sdX device the system has assigned to your micro SD Card. Here are some examples:
   • Card already has some partitions:

     $ dmesg | tail
     ...
     sd 1:0:0:0: [sdb] 3909632 512-byte logical blocks: (2.00GB/1.86GiB)
     sd 1:0:0:0: [sdb] Cache data unavailable
     sd 1:0:0:0: [sdb] Assuming drive cache: write through
     sdb: sdb1 sdb2

   • Other card, which has no partitions:

     $ dmesg | tail
     ...
     sd 1:0:0:0: [sdb] 31116288 512-byte logical blocks: (15.9GB/14.8 GiB)
     sd 1:0:0:0: [sdb] Cache data unavailable
     sd 1:0:0:0: [sdb] Assuming drive cache: write through
     sdb: unknown partition table

3. Install U-Boot (prebuilt SPL and u-boot.img images) to the micro SD card. Note that you need to specify the whole device as the destination for the dd command (i.e. do not install the image to a partition):

$ sudo dd if=SPL of=/dev/sdX bs=1k seek=1 conv=notrunc; sync
$ sudo dd if=u-boot.img of=/dev/sdX bs=1k seek=128 conv=notrunc; sync

4. Safely remove the micro SD Card from the Linux PC.
5. Insert the micro SD Card to the SD Card holder on the NXP EVK board. Configure the NXP i.MX RT1024 EVK board for booting from the micro SD Card. Set the boot selection jumpers SW8 as follows:
   • SW8.1-4=0110
6. Connect the microUSB cable to the J23 connector on the baseboard to the development host to provide the power and serial console.

U-Boot SPL 2022.04 (Jun 28 2023 - 08:26:52 +0000)
Trying to boot from MMC1

U-Boot 2022.04 (Jun 28 2023 - 08:26:52 +0000)

DRAM: 32 MiB
Core: 59 devices, 13 uclasses, devicetree: separate
MMC: FSL_SDHC: 0
Loading Environment from MMC... OK
In: serial@40184000
Out: serial@40184000
Err: serial@40184000
Net: eth0: ethernet@402D8000
Hit any key to stop autoboot: 0

7. Validate the U-boot command monitor. For example:

=> help
 ?       - alias for 'help'
 base    - print or set address offset
 ... 
 =>

Troubleshooting

If the software installation wasn't a success, and the target board does not boot (no activity in the console), then verify the following items:

1. If the micro SD Card was programmed on the virtual machine (e.g. VmWare), then try to program the micro SD Card on a PC with the native Linux.
2. Verify that the green power LEDs D3 switch ON when you power-on the board with the microUSB cable.
3. Verify that the SW8 switches are set to the positions that correspond to "SD DEVICE" as specified on the silkscreen of your EVK board.
4. If suggestions above do not help, then please provide us with the following materials:
   • A photo of your MIMXRT1024-EVK board (a backside with SD and jumpers should be enough);
   • A full log of SD preparation and installation procedures;
   • The SPL and u-boot.img binaries.