iMX8M Industrial Basic Accessing and Testing Peripherals - Revision history

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Voipac: Created page with "Category:iMX8M Industrial Category:iMX8M Industrial Software Category:iMX8M Industrial Testing Category:iMX8M Industrial Peripherals

2022-01-11T08:39:10Z

Created page with "Category:iMX8M Industrial Category:iMX8M Industrial Software Category:iMX8M Industrial Testing Category:iMX8M Industrial Peripherals  <div style="float..."

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[[Category:iMX8M Industrial]]
[[Category:iMX8M Industrial Software]]
[[Category:iMX8M Industrial Testing]]
[[Category:iMX8M Industrial Peripherals]]

<div style="float:right">TOC</div>

Elemental operations of iMX8M Industrial Development Kit interfaces are shown on this page.

== Prerequisites ==
=== Hardware ===
* DC power supply (5V, 4A)
* iMX6 OpenRex SBC UltraPlus

=== Peripherals and Accessories ===
* 1x FullHD monitor with Audio output
* 1x MicroSD card
* 1x MiniPCIe WiFi card
* 1x MiniPCIe 3G card
* 1x RPi camera module
* 1x SATA HDD drive
* 2x USB FLASH drive
* 1x Infrared remote

=== Cables ===
* Ethernet cable
* HDMI cable
* Micro USB cable
* USB to UART cable
* Headphones

== Audio ==
'''''Input:''''' Search kernel log for SGTL5000 chip<br />
'''''Output:''''' Audio chip is detected and bound as an input device
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# dmesg | grep -i sgtl5000
sgtl5000 1-000a: sgtl5000 revision 0x11
sgtl5000 1-000a: Using internal LDO instead of VDDD
imx-sgtl5000 sound-sgtl5000: sgtl5000 <-> 2028000.ssi mapping ok
#0: imx-audio-sgtl5000
</syntaxhighlight>

'''''Input:''''' Run alsamixer command<br />
'''''Output:''''' Card imx-audio-sgtl5000 is available
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# alsamixer
lqqqqqqqqqqqqqqqqqqqqqqqqqqqqq AlsaMixer v1.0.29 qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk
x Card: imx-audio-sgtl5000 F1: Help x
x Chip: F2: System information x
x View: F3:[Playback] F4: Capture F5: All F6: Select sound card x
x Item: Headphone [dB gain: -19.00, -20.00] Esc: Exit x
x x
x lqqk lqqk lqqk x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x xaax x x x
x x x xaax x x x
x x x xaax x x x
x x x xaax x x x
x x x xaax x x x
x xa x xaax x x x
x xaax xaax x x x
x xaax xaax x x x
x mqqj DAC lqqk mqqj mqqj lqqk MIC_IN lqqk x
x xOOx xMMx xOOx x
x mqqj mqqj mqqj x
x 24<>23 75<>75 0 x
x <Headphon>Headphon Headphon PCM Mic Capture Capture Capture x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
</syntaxhighlight>

'''''Input:''''' Boot-up the board with HDMI cable plugged in, connect headphones into HP_OUT connector and plug-in USB flash drive with MP3 file on it<br />
'''''Output:''''' Sound is played and heard
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# aplay multimedia/sample.wav
Playing WAVE 'multimedia/sample.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
</syntaxhighlight>

<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# #aplay -D sysdefault:CARD=imxaudiosgtl500 multimedia/sample.wav
root@imx6-openrexultra:~# aplay -D sysdefault:CARD=sgtl5000audio multimedia/sample.wav
Playing WAVE 'multimedia/sample.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
</syntaxhighlight>

<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# aplay -D sysdefault:CARD=imxhdmisoc multimedia/sample.wav
Playing WAVE 'multimedia/sample.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
</syntaxhighlight>

'''''Input:''''' Plug headphones with microphone input into HP_OUT connector<br />
'''''Output:''''' Microphone sound is played in headphones
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# #arecord -D sysdefault:CARD=imxaudiosgtl500 -t wav -f cd | aplay -D sysdefault:CARD=imxaudiosgtl500
root@imx6-openrexultra:~# arecord -D sysdefault:CARD=sgtl5000audio -t wav -f cd | aplay -D sysdefault:CARD=sgtl5000audio
</syntaxhighlight>

'''''Input:''''' Plug headphones with microphone input into HP_OUT connector<br />
'''''Output:''''' Sound is recorded and played afterwards
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# #arecord -D sysdefault:CARD=imxaudiosgtl500 -t wav -f cd -d 10 multimedia/recorded.wav
root@imx6-openrexultra:~# arecord -D sysdefault:CARD=sgtl5000audio -t wav -f cd -d 10 multimedia/recorded.wav
Recording WAVE 'multimedia/recorded.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
root@imx6-openrexultra:~# #aplay -D sysdefault:CARD=imxaudiosgtl500 multimedia/recorded.wav
root@imx6-openrexultra:~# aplay -D sysdefault:CARD=sgtl5000audio multimedia/recorded.wav
Playing WAVE 'multimedia/recorded.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
</syntaxhighlight>

== User button ==
'''''Input:''''' Press Home/Back-/Menu+ buttons<br />
'''''Output:''''' Button events 1 and 0 are generated
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# evtest /dev/input/by-path/platform-gpio-keys-event
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio-keys"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 102 (KEY_HOME)
Event code 139 (KEY_MENU)
Event code 158 (KEY_BACK)
Properties:
Testing ... (interrupt to exit)
Event: time 1473952105.010541, type 1 (EV_KEY), code 102 (KEY_HOME), value 1
Event: time 1473952105.010541, -------------- SYN_REPORT ------------
Event: time 1473952105.140569, type 1 (EV_KEY), code 102 (KEY_HOME), value 0
Event: time 1473952105.140569, -------------- SYN_REPORT ------------
Event: time 1473952106.320588, type 1 (EV_KEY), code 158 (KEY_BACK), value 1
Event: time 1473952106.320588, -------------- SYN_REPORT ------------
Event: time 1473952106.440540, type 1 (EV_KEY), code 158 (KEY_BACK), value 0
Event: time 1473952106.440540, -------------- SYN_REPORT ------------
Event: time 1473952109.630544, type 1 (EV_KEY), code 139 (KEY_MENU), value 1
Event: time 1473952109.630544, -------------- SYN_REPORT ------------
Event: time 1473952109.760589, type 1 (EV_KEY), code 139 (KEY_MENU), value 0
Event: time 1473952109.760589, -------------- SYN_REPORT ------------
</syntaxhighlight>

=== Alternative test ===
'''''Input:''''' Press Home/Back-/Menu+ buttons<br />
'''''Output:''''' Button events 1 and 0 are generated
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# hexdump -C /dev/input/by-path/platform-gpio-keys-event
00000000 ef e7 da 57 ca 8e 0a 00 01 00 66 00 01 00 00 00 |...W......f.....|
00000010 ef e7 da 57 ca 8e 0a 00 00 00 00 00 00 00 00 00 |...W............|
00000020 ef e7 da 57 9f b1 0c 00 01 00 66 00 00 00 00 00 |...W......f.....|
00000030 ef e7 da 57 9f b1 0c 00 00 00 00 00 00 00 00 00 |...W............|
00000040 f0 e7 da 57 28 70 06 00 01 00 9e 00 01 00 00 00 |...W(p..........|
00000050 f0 e7 da 57 28 70 06 00 00 00 00 00 00 00 00 00 |...W(p..........|
00000060 f0 e7 da 57 18 93 08 00 01 00 9e 00 00 00 00 00 |...W............|
00000070 f0 e7 da 57 18 93 08 00 00 00 00 00 00 00 00 00 |...W............|
00000080 f1 e7 da 57 69 78 02 00 01 00 8b 00 01 00 00 00 |...Wix..........|
00000090 f1 e7 da 57 69 78 02 00 00 00 00 00 00 00 00 00 |...Wix..........|
000000a0 f1 e7 da 57 68 9b 04 00 01 00 8b 00 00 00 00 00 |...Wh...........|
000000b0 f1 e7 da 57 68 9b 04 00 00 00 00 00 00 00 00 00 |...Wh...........|
</syntaxhighlight>

== Reset button ==
'''''Input:''''' Press the RESET button<br />
'''''Output:''''' The board will execute bootloader immediately with "Reset cause: POR"<br />
'''''Note:''''' iMX6 OpenRex SBC should never freeze or hang after the reset button was pressed. Testing the operation 10 times gives a reliable result
<syntaxhighlight lang="bash">
U-Boot 2015.10+fslc+g7d8ddd7 (Dec 15 2016 - 18:52:24 +0100)

CPU: Freescale i.MX6QUAD rev1.1 996 MHz (running at 792 MHz)
CPU: Extended Commercial temperature grade (-20C to 105C) at 44C
Reset cause: POR
Board: iMX6-OpenRex
I2C: ready
DRAM: 512 MiB
MMC: FSL_SDHC: 0
SF: Detected SST26VF032B with page size 256 Bytes, erase size 4 KiB, total 4 MiB
In: serial
Out: serial
Err: serial
Net: FEC [PRIME]
Hit any key to stop autoboot: 0
OpenRex U-Boot>
</syntaxhighlight>

== CAN ==
'''''Input:''''' None<br />
'''''Output:''''' Device driver is available

<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# ip addr show dev can0
2: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
link/can
root@imx6-openrexultra:~# ip addr show dev can1
3: can1: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
link/can
</syntaxhighlight>

== Camera Input ==
'''''Input:''''' Connect RPi camera module into CSI interface and check if it is detected on I2C bus<br />
'''''Output:''''' I2C address 0x36 is occupied and under use<br />
'''''Note:''''' HDMI monitor may cause I2C communication issues
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- UU -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --
40: UU -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
</syntaxhighlight>

'''''Input:''''' Connect RPi camera into CSI interface and check kernel modules<br />
'''''Output:''''' Device driver ov5647_camera_mipi_int(or ov5647_camera_mipi) is loaded
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# lsmod
Module Size Used by
mxc_v4l2_capture 27362 1
ipu_bg_overlay_sdc 5230 1 mxc_v4l2_capture
ipu_still 2304 1 mxc_v4l2_capture
ipu_prp_enc 5864 1 mxc_v4l2_capture
ipu_csi_enc 3807 1 mxc_v4l2_capture
ipu_fg_overlay_sdc 6056 1 mxc_v4l2_capture
lm75 4768 0
sht21 2126 0
ov5647_camera_mipi_int 30415 0
v4l2_int_device 2897 3 ov5647_camera_mipi_int,ipu_csi_enc,mxc_v4l2_capture
at24 5488 0
fxas2100x 6680 0
fxos8700 9014 0
mxc_dcic 6536 0
iwl4965 88394 0
iwlegacy 62850 1 iwl4965
galcore 226429 2
</syntaxhighlight>

'''''Input:''''' Connect RPi camera module into CSI interface and capture image<br />
'''''Output:''''' The image is displayed on HDMI monitor
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo 2 > /sys/bus/i2c/devices/1-0036/ov5647_mode
root@imx6-openrexultra:~# gst-launch-1.0 v4l2src device="/dev/video0" ! video/x-bayer,width=1920,height=1080,framerate=30/1 ! queue ! bayer2rgb ! videoconvert ! fbdevsink
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: v4l2 capture: unsupported ioctrl!
ERROR: v4l2 capture: unsupported ioctrl!
WARNING: from element /GstPipeline:pipeline0/GstFBDEVSink:fbdevsink0: A lot of buffers are being dropped.
Additional debug info:
/home/marek/workdir/imx6/yocto/fsl-release-bsp-4.1/build-x11/tmp/work/cortexa9hf-vfp-neon-poky-linux-gnueabi/gstreamer1.0/1.6.0-r0/gstreamer-1.6.0/libs/gst/base/gstbasesink.c(2846): gst_base_sink_is_too_la:
There may be a timestamping problem, or this computer is too slow.
mxc_hdmi 20e0000.hdmi_video: Read EDID again
mxc_hdmi 20e0000.hdmi_video: create default modelist
EVENT plugin
WARNING: from element /GstPipeline:pipeline0/GstFBDEVSink:fbdevsink0: A lot of buffers are being dropped.
Additional debug info:
/home/marek/workdir/imx6/yocto/fsl-release-bsp-4.1/build-x11/tmp/work/cortexa9hf-vfp-neon-poky-linux-gnueabi/gstreamer1.0/1.6.0-r0/gstreamer-1.6.0/libs/gst/base/gstbasesink.c(2846): gst_base_sink_is_too_la:
There may be a timestamping problem, or this computer is too slow.
^Chandling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:27.103901670
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
power_down_callback: ipu0/csi1
</syntaxhighlight>

=== Alternative test ===
'''''Input:''''' Connect RPi camera module into CSI interface and capture image<br />
'''''Output:''''' The image is displayed on HDMI monitor
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo 1 > /sys/bus/i2c/devices/1-0036/ov5647_mode
root@imx6-openrexultra:~# gst-launch-1.0 v4l2src device="/dev/video0" ! video/x-bayer,width=1280,height=720,framerate=30/1 ! queue ! bayer2rgb ! videoconvert ! fbdevsink
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
ERROR: v4l2 capture: unsupported ioctrl!
ERROR: v4l2 capture: unsupported ioctrl!
WARNING: from element /GstPipeline:pipeline0/GstFBDEVSink:fbdevsink0: A lot of buffers are being dropped.
Additional debug info:
/home/marek/workdir/imx6/yocto/fsl-release-bsp-4.1/build-x11/tmp/work/cortexa9hf-vfp-neon-poky-linux-gnueabi/gstreamer1.0/1.6.0-r0/gstreamer-1.6.0/libs/gst/base/gstbasesink.c(2846): gst_base_sink_is_too_la:
There may be a timestamping problem, or this computer is too slow.
^Chandling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:06.514209667
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
root@imx6-openrexultra:~# power_down_callback: ipu0/csi1
</syntaxhighlight>

Software integration and additional commands or settings of CSI camera interface are available on separate [[iMX6 OpenRex Camera|iMX6 OpenRex Camera page]].

== Ethernet ==
'''''Input:''''' None<br />
'''''Output:''''' Device driver is available<br />
'''''Note:''''' MAC address should be identical with the address on the sticker placed on the board
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# ip addr show dev eth0
4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0d:15:00:d1:75 brd ff:ff:ff:ff:ff:ff
</syntaxhighlight>

'''''Input:''''' Plug Ethernet cable into connector and issue DHCP command<br />
'''''Output:''''' IPv4 address is assigned
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# dmesg | tail
...
fec 2188000.ethernet eth0: Link is Down
fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off
</syntaxhighlight>

<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# udhcpc -i eth0
udhcpc (v1.23.2) started
Sending discover...
Sending discover...
Sending select for 192.168.1.39...
Lease of 192.168.1.39 obtained, lease time 600
/etc/udhcpc.d/50default: Adding DNS 192.168.1.1
/etc/udhcpc.d/50default: Adding DNS 192.168.1.2
</syntaxhighlight>

== HDMI Output ==
'''''Input:''''' Connect LCD monitor to the SBC<br />
'''''Output:''''' Desktop UI is displayed correctly<br />
[[image:iMX6_TinyRex_Development_Kit-HDMI_terminal.png|580px]]

== I2C ==
'''''Input:''''' Scan I2C bus 0<br />
'''''Output:''''' Available devices:<br />
PMIC control (0x08)
* Compass + Accelerometer FXOS8700 (0x1C)
* Gyroscope FXAS21002 (0x20)
* EEPROM (0x50/0x57)
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- UU -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- UU -- -- --
20: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: UU UU UU UU UU UU UU UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
</syntaxhighlight>

'''''Input:''''' Scan I2C bus 1<br />
'''''Output:''''' Available devices:<br />
* Audio SGTL5000 (0x0A)
* CSI Camera (0x36)
* Humidity sensor SHT21 (0x40)
* Temperature sensor TMP101 (0x48)
* HDMI Output EDID (0x50)
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- UU -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --
40: UU -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
</syntaxhighlight>

'''''Input:''''' Scan I2C bus 2<br />
'''''Output:''''' This I2C bus is reserved for external use and accessible via connectors<br />
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# i2cdetect -y 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
</syntaxhighlight>

'''''Input:''''' Trigger I2C EEPROM detection<br />
'''''Output:''''' I2C EEPROM is detected
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo -n "0-0050" > /sys/bus/i2c/drivers/at24/unbind
root@imx6-openrexultra:~# echo -n "0-0050" > /sys/bus/i2c/drivers/at24/bind
at24 0-0050: 2048 byte 24c16 EEPROM, writable, 1 bytes/write
</syntaxhighlight>

'''''Input:''''' Write and read data from I2C EEPROM<br />
'''''Output:''''' If successful, console text 'Data are the same' should appear
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo -n "0123" > eeprom_in
root@imx6-openrexultra:~# cat eeprom_in > /sys/bus/i2c/devices/0-0050/eeprom
root@imx6-openrexultra:~# head -c 4 /sys/bus/i2c/devices/0-0050/eeprom > eeprom_out
root@imx6-openrexultra:~# diff eeprom_in eeprom_out && echo "Data are the same"
Data are the same
</syntaxhighlight>

=== Altarnative test ===
'''''Input:''''' List I2C bus 0, 1 and 2<br />
'''''Output:''''' Available devices are displayed
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# ls /sys/bus/i2c/devices/i2c-0 | grep ^[0]
0-0008
0-001c
0-0020
0-0050
0-0051
0-0052
0-0053
0-0054
0-0055
0-0056
0-0057
</syntaxhighlight>

== Sensors ==
'''''Input:''''' Test Compass, Accelerometer (FXOS8700) and Gyroscope (FXAS21002) sensors<br />
'''''Output:''''' Sensors are registered by the Linux kernel
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo 1 > /sys/devices/virtual/misc/FreescaleAccelerometer/enable
root@imx6-openrexultra:~# echo 1 > /sys/devices/virtual/misc/FreescaleMagnetometer/enable
root@imx6-openrexultra:~# echo 1 > /sys/devices/virtual/misc/FreescaleGyroscope/enable
misc FreescaleGyroscope: mma enable setting active
root@imx6-openrexultra:~# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: gpio_ir_recv
/dev/input/event1: MCE IR Keyboard/Mouse (gpio-rc-recv)
/dev/input/event2: gpio-keys
/dev/input/event3: fxos8700
/dev/input/event4: fxas2100x
Select the device event number [0-4]: 3
...
root@imx6-openrexultra:~# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: gpio_ir_recv
/dev/input/event1: MCE IR Keyboard/Mouse (gpio-rc-recv)
/dev/input/event2: gpio-keys
/dev/input/event3: fxos8700
/dev/input/event4: fxas2100x
Select the device event number [0-4]: 4
...
root@imx6-openrexultra:~# echo 0 > /sys/devices/virtual/misc/FreescaleAccelerometer/enable
root@imx6-openrexultra:~# echo 0 > /sys/devices/virtual/misc/FreescaleMagnetometer/enable
root@imx6-openrexultra:~# echo 0 > /sys/devices/virtual/misc/FreescaleGyroscope/enable
</syntaxhighlight>

'''''Input:''''' Test SHT21 humidity sensor<br />
'''''Output:''''' Sensor provides actual humidity and temperature values
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# cat /sys/devices/soc0/soc/2100000.aips-bus/21a4000.i2c/i2c-1/1-0040/hwmon/hwmon/humidity1_input
20741
root@imx6-openrexultra:~# cat /sys/devices/soc0/soc/2100000.aips-bus/21a4000.i2c/i2c-1/1-0040/hwmon/hwmon/temp1_input
30853
</syntaxhighlight>

'''''Input:''''' Test TMP101 temperature sensor<br />
'''''Output:''''' Sensor provides current temperature readout
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# cat /sys/devices/soc0/soc/2100000.aips-bus/21a4000.i2c/i2c-1/1-0048/hwmon/hwmon/temp1_input
32125
</syntaxhighlight>

== Infrared receiver ==
'''''Input:''''' Press Infrared remote keys. (For Samsung Infrared remote load "nec" protocol)<br />
'''''Output:''''' Events are detected
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo nec > /sys/devices/soc0/ir-receiver/rc/rc0/protocols
root@imx6-openrexultra:~# evtest /dev/input/by-path/platform-ir-receiver-event
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio_ir_recv"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 152 (KEY_SCREENLOCK)
Event type 4 (EV_MSC)
Event code 4 (MSC_SCAN)
Key repeat handling:
Repeat type 20 (EV_REP)
Repeat code 0 (REP_DELAY)
Value 500
Repeat code 1 (REP_PERIOD)
Value 125
Properties:
Testing ... (interrupt to exit)
Event: time 1474009071.488894, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70707
Event: time 1474009071.488894, -------------- SYN_REPORT ------------
Event: time 1474009072.178245, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7070b
Event: time 1474009072.178245, -------------- SYN_REPORT ------------
</syntaxhighlight>

== User LED ==
'''''Input:''''' None<br />
'''''Output:''''' Script switches User LED ON and OFF in one second intervals
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~#
for LED in /sys/devices/soc0/leds/leds/*
do
echo Testing ${LED}
echo -n "1" > ${LED}/brightness
sleep 1
echo -n "0" > ${LED}/brightness
sleep 1
done
</syntaxhighlight>

'''''Input:''''' None<br />
'''''Output:''''' User LED is set to heartbeat blinking sequence
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo -n "heartbeat" > /sys/devices/soc0/leds/leds/module-led/trigger
</syntaxhighlight>

== SD Activity LED ==
'''''Input:''''' None<br />
'''''Output:''''' SD activity LED is set to show the status of SD card interface
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# echo -n "mmc1" > /sys/devices/soc0/leds/leds/sd-activity-led/trigger
</syntaxhighlight>

== Microcontroller LPC1347 ==
'''''Input:''''' LPC1347 firmware<br />
'''''Output:''''' MCU program is executed and LED starts blinking
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# openrex-isp-handler.sh lpc/LPC1347-userLED.bin
ISP low
RST low
RST high
lpc21isp version 1.97
File lpc/LPC1347-userLED.bin:
loaded...
image size : 1068
Image size : 1068
Synchronizing (ESC to abort). OK
Read bootcode version: 2
5
Read part ID: LPC1345, 32 kiB FLASH / 8 kiB SRAM (0x28010541)
Will start programming at Sector 1 if possible, and conclude with Sector 0 to ensure that checksum is written last.
Erasing sector 0 first, to invalidate checksum. OK
Sector 0: ..........................
Download Finished... taking 0 seconds
Now launching the brand new code
RST low
ISP high
RST high
</syntaxhighlight>

== DDR memory ==
'''''Input:''''' None<br />
'''''Output:''''' Memory test passes without any errors
<syntaxhighlight lang="bash">
root@imx6-openrexultra:~# memtester 2G 1
memtester version 4.1.3 (32-bit)
Copyright (C) 2010 Charles Cazabon.
Licensed under the GNU General Public License version 2 (only).

pagesize is 4096
pagesizemask is 0xfffff000
want 2048MB (2147483648 bytes)
got 251MB (263602176 bytes), trying mlock ...locked.
Loop 1/1:
Stuck Address : ok
Random Value : ok
Compare XOR : ok
Compare SUB : ok
Compare MUL : ok
Compare DIV : ok
Compare OR