Boot from an eMMC memory device
You can prepare a bootable eMMC memory device to use to boot your board.
Note:
After you have QNX OS running on your target board, complete the following steps to prepare a
bootable eMMC and copy the QNX IPL and QNX IFS to it:
Before you can perform the steps to prepare a bootable eMMC, you must
first boot your board using a bootable
SD card. For more information, see
Prepare a bootable microSDand
Use the QNX IPL to boot the board.
- Copy the QNX IFS file (qnx-ifs-cpu-mek), and QNX IPL file (ipl-imx8qm-cpu-mek_b0.imx; i.MX8QM MEK with the B0 SoC) to the /tmp directory on your target board.
- If the eMMC device contains a FAT32 partition, skip to step 5; otherwise, delete all
existing partitions on the eMMC using the following commands and continue with
the following steps:
# fdisk /dev/emmc0 show -l _____OS_____ Start End ______Number______ Size Boot name type Block Block Cylinders Blocks FAT32 12 2048 2099199 1024 2097152 1024 MB QNX6 179 2099200 61079551 28799 58980352 28799 MB ------ --- --------- --------- ------- --------- ----- ------ --- --------- --------- ------- --------- ----- # fdisk /dev/emmc0 delete -a # # fdisk /dev/emmc0 show -l _____OS_____ Start End ______Number______ Size Boot name type Block Block Cylinders Blocks ------ --- --------- --------- ------- --------- ----- ------ --- --------- --------- ------- --------- ----- ------ --- --------- --------- ------- --------- ----- ------ --- --------- --------- ------- --------- ----- #
- Create a 1024MB partition starting from block 2048 using the following
command:
# fdisk /dev/emmc0 add -t 11 -l -c2048,2099199 # # fdisk /dev/emmc0 show -l _____OS_____ Start End ______Number______ Size Boot name type Block Block Cylinders Blocks FAT32 11 2048 2099199 1024 2097152 1024 MB ------ --- --------- --------- ------- --------- ----- ------ --- --------- --------- ------- --------- ----- ------ --- --------- --------- ------- --------- ----- #
- Mount and format the eMMC device using these commands:
# mount -e /dev/emmc0 # mkdosfs /dev/emmc0t11
- Mount the FAT32 partition of the eMMC using the following command:
# mount -t dos /dev/emmc0t11 /fs/emmc
- Copy the QNX IFS file [qnx-ifs-cpu-mek(i.MX8QM MEK)] from the /tmp directory to the fs/emmc directory. You can also use the QNX Momentics IDE to copy the file using the following command:
cp /tmp/qnx-ifs-cpu-mek /fs/emmc/qnx-ifs
Note:The QNX IFS images must be copied to the target DOS filesystem with the name as qnx-ifs. - Copy the NXP DTB file fsl-imx8qm-mek.dtb to the fs/emmc directory:
cp /tmp/fsl-imx8qm-mek.dtb /fs/emmc/imx-dtb
- Copy the QNX IPL to the eMMC memory device raw partition using following command:
# dd if=/tmp/ipl-imx8qm-cpu-mek_b0.imx of=/dev/emmc0 bs=1k seek=32
- Set the boot switches on your board to boot from eMMC instead of the SD card on your board as follows:
Figure 1DIP switch configuration for the i.MX8 MEK to boot from eMMC For more information about configuring the DIP switches, see
Set up the hardware
in this chapter - Press the SW3 (RESET) on the i.MX8QM MEK to reset the
board and boot using the eMMC. Press
the E key to boot from the eMMC when prompted in your
console.
Welcome to QNX Initial Program Loader for NXP i.MX8QM(Rev B) MEK Board (ARM Cortex-A53/A72) SCFW build version: 5624, SCFW commit: 6638c032 SECO version: 2.5.6, commit: 6638c032 Command: Press 'D' for serial download, using the 'sendnto' utility Press 'M' for eSDC download, IFS filename MUST be 'QNX-IFS' Press 'E' for eMMC download, IFS filename MUST be 'QNX-IFS' Press 'F' for NOR flash download, IFS MUST be at 0x100000 offset
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