IMX7 First Boot

New family member, SBC-iMX7!

  • CompuLab 0815
  • SB-SOM Rev1.1 188C02751


First boot!

Find the power supply

I found a 12V 1A DC power supply, and just happend to have a DC adapter kit.

CL-SOM-iMX7: Evaluation Kit: Getting Started

SB-SOM top view

U-Boot fails to mount filesystem

Trouble in paradise

→ kermit -l /dev/ttyUSB1 -b 115200 -c
Connecting to /dev/ttyUSB1, speed 115200
 Escape character: Ctrl-\ (ASCII 28, FS): enabled
Type the escape character followed by C to get back,
or followed by ? to see other options.
U-Boot SPL 2015.04-cl-som-am57x-0.80 (Dec 21 2015 - 12:30:11)
DRA752 ES1.1
Trying to boot from SPI

U-Boot 2015.04-cl-som-am57x-0.80 (Dec 21 2015 - 12:30:11)

CPU  : DRA752 ES1.1
Board: CL-SOM-AM57x
I2C:   ready
DRAM:  2 GiB
SF: Detected M25PX16 with page size 256 Bytes, erase size 64 KiB, total 2 MiB, mapped at 5c000000
PCB:   1.0
SCSI:  SATA link 0 timeout.
AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: 64bit ncq stag pm led clo only pmp pio slum part ccc apst
scanning bus for devices...
Found 0 device(s).
Net:   cpsw
Hit any key to stop autoboot:  0
MMC: no card present
switch to partitions #0, OK
mmc1(part 0) is current device
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Unknown command 'nand' - try 'help'

Yocto Linux Image

So I used Etcher to burn a microsd with cl-som-imx7-image-qt5.sdcard.bz2. Note that P6, the SD Card slot is used for boot.

Alternatively we can use bzcat:

→ bzcat ./cl-som-imx7-yocto-linux/images/cl-som-imx7-image-qt5.sdcard.bz2 | sudo dd of=/dev/sdd bs=1M ; sync
0+310393 records in
0+310393 records out
1556086784 bytes (1.6 GB, 1.4 GiB) copied, 121.705 s, 12.8 MB/s

U-Boot Upgrade

Ehhhh, I’m a bit scared. I’ll wait.


Nathan Genetzky
Software Engineer

Software Engineer by Day, Electronic Hobbyist by Night.


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