VAR-SOM-MX6 Yocto Unit Testing

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Unit Testing


Play OpenGLES demo, from Linux shell type:

$ modprobe galcore
$ cd /opt/viv_samples/vdk/ && ./tutorial3 -f 1000


List SSIDs, from Linux shell type:

$ ifconfig wlan0 up
$ iwlist wlan0 scan

Connecting to an encrypted network

Find your network from the above scan command.

$ wpa_passphrase <YourAP> <YourPassword> >wpa.conf
$ ps | grep wpa_supplicant
*kill the wpa_supplicant process if exist.
$ wpa_supplicant -Dwext -iwlan0 -c./wpa.conf -B
$ udhcpc -iwlan0
$ ifconfig

Gbit Ethernet

On Target:

$ ifconfig
$ iperf -s -u

On Host:

$ iperf -c -u -b1000M -w4KB


$ hcitool scan
$ l2ping 98:03:D8:C7:1A:96

Video playback

Play video file, from linux shell type:

$ gplay <file>

Audio record/play

$ amixer set PCM 200
$ aplay /usr/share/sounds/alsa/Front_Center.wav
$ arecord -f cd -d 10 -D hw:0,0 test.wav
$ aplay test.wav 

HDMI, LVDS , LCD boot arguments

All paramters are u-boot enviroment parameters.


U-Boot # setenv bootargs_base 'setenv bootargs console=ttymxc0,115200'

This will set the LCD to work.

HDMI 1080P:

U-Boot # setenv bootargs_base 'setenv bootargs console=ttymxc0,115200 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB16 fbmem=48M vmalloc=400 mxc_hdmi.only_cea=1'

mxc_hdmi.only_cea=1 paramter is to work with dvi-hdmi adapter. If you connect it to a TV-HDMI this paramters is not required.

HDMI 720P:

U-Boot # setenv bootargs_base 'setenv bootargs console=ttymxc0,115200 video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB24'

LVDS and LCD Dual display:

U-Boot # setenv bootargs_base 'setenv bootargs console=ttymxc0,115200 ldb=dul0'

LVDS only display:

U-Boot # setenv bootargs_base 'setenv bootargs console=ttymxc0,115200 ldb=sin1'

LVDS only display with screen paramters:

U-Boot # setenv bootargs_base 'setenv bootargs console=ttymxc0,115200 ldb=sin1 video=mxcfb0:dev=ldb,800x600M@60,if=RGB24'


To set the RTC first set the date from Linux shell, type:

$ date 2013.08.27-15:43

Then set the real time clock from Linux shell, type:

$ hwclock --systohc

Power down your board wait 5 minutes and power up. Check your system with date and the time should be up to date.


$ modprobe ov5642_camera
$ modprobe mxc_v4l2_capture
$ /etc/rc5.d/S01xserver-nodm stop
$ gst-launch mfw_v4lsrc ! mfw_v4lsink

External Uart

Use minicom to connect. Set the serial to ttymxc2 You can use a loopback or connect to anther computer


$ cat /proc/scsi/scsi
$ fdisk /dev/sda 
When you get prompt "Command (m for help):" hit p

Test output example:

root@varsommx6q:~# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: ST9120823AS      Rev: 3.AD
  Type:   Direct-Access                    ANSI  SCSI revision: 05
root@varsommx6q:~# fdisk /dev/sda

The number of cylinders for this disk is set to 14593.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks  Id System
/dev/sda1   *           1        9123    73280466   7 HPFS/NTFS
/dev/sda2            9124       14593    43937744+  f Win95 Ext'd (LBA)
/dev/sda5            9124       11035    15358108+  7 HPFS/NTFS
/dev/sda6           14319       14593     2208906  82 Linux swap
/dev/sda7           11036       14318    26369024  83 Linux


$ lspci 

The output should look like:
00:00.0 PCI bridge: Device 16c3:abcd (rev 01)
01:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)

USB OTG as host

Plugin Disk on Key Keyboard or Mouse. It will work automaticly.

Use the file manager and the mouse to browse the file system.

You can open terminal and type in Linux commands.

USB OTG as device

Plug a cable to a A linux host.

Folow and build the backing_file.

On the Target:

modprobe g_file_storage file=./backing_file

On the Host:

use dmesg and find out your device for example /dev/sdb
sudo dd if=/dev/zero of=/dev/sdb bs=128k count=1000

3 ports USB Host

Plug a DiskOnKey, Mouse or Keyboard to any of the 3 ports.


Starting Release 4 of the Yocto Canbus is integrated into the system. No patch required.

  1. Connect 2 boards. Each board JP26 connect to the other with the right cable.

Set up the 2 boards by running on each of them:

$ canconfig can0 bitrate 125000
$ ifconfig can0 up 

On board #1:

canecho can0 -v

On board #2:

cansend can0 -i 0x100 0x11 0x22 0x33 0x44