iMX6 Rex UltraPlus Accessing and Testing Peripherals - Revision history

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Voipac: Created page with "Category:iMX6 Rex Development kit Category:iMX6 Rex UltraPlus Category:iMX6 Rex Peripherals
TOC
Elemental operations o..."

2021-04-07T20:18:12Z

Created page with "Category:iMX6 Rex Development kit Category:iMX6 Rex UltraPlus Category:iMX6 Rex Peripherals  <div style="float:right">__TOC__</div> Elemental operations o..."

New page

[[Category:iMX6 Rex Development kit]]
[[Category:iMX6 Rex UltraPlus]]
[[Category:iMX6 Rex Peripherals]]

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

Elemental operations of iMX6 Rex Development kit interfaces in UltraPlus configuration are shown on this page.

== Prerequisites ==
=== Hardware ===
* DC power supply (12V, 1A)
* iMX6 Rex Module UltraPlus
* iMX6 Rex Baseboard

=== Peripherals and Accessories ===
* 1x FullHD monitor with Audio output
* 1x LVDS touchscreen display
* 2x MicroSD card
* 1x MiniPCIe WiFi card
* 1x MiniPCIe 3G card
* 1x SATA HDD drive
* 2x USB FLASH drive
* 1x headphones
* 1x microphone

=== Cables ===
* Ethernet cable
* HDMI cable
* Micro USB cable
* RS-232 cable

== Audio ==
'''''Input:''''' Search kernel log for SGTL5000 chip 
'''''Output:''''' Audio chip is detected and bound as an input device
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# dmesg | grep -i sgtl5000
sgtl5000 0-000a: sgtl5000 revision 0x11
sgtl5000 0-000a: Using internal LDO instead of VDDD
imx-sgtl5000 sound.23: sgtl5000 <-> 2028000.ssi mapping ok
#0: imx-audio-sgtl5000
</syntaxhighlight>

'''''Input:''''' Run alsamixer command 
'''''Output:''''' Card imx-audio-sgtl5000 is available
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# alsamixer
lqqqqqqqqqqqqqqqqqqqqqqqqqqqqq AlsaMixer v1.0.28 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: -20.00, -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 x 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 23<>23 75<>75 0 x
x <Headphon>Headphon Headphon PCM Mic Capture Capture Capture x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
</syntaxhighlight>

'''''Input:''''' Boot-up module with HDMI cable plugged in, connect headphones into LINE_OUT connector and plug-in USB flash drive with MP3 file 
'''''Output:''''' Sound is played and heard
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# aplay -D sysdefault:CARD=sgtl5000audio multimedia/sample.wav
#root@imx6-rexultra:~# aplay -D sysdefault:CARD=imxaudiosgtl500 multimedia/sample.wav
Playing WAVE 'multimedia/sample.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
</syntaxhighlight>

<syntaxhighlight lang="bash">
root@imx6-rexultra:~# 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 into HEADPHONES connector and mic into MICROPHONE connector 
'''''Output:''''' Microphone sound is played in headphones
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# arecord -D sysdefault:CARD=sgtl5000audio -t wav -f cd | aplay -D sysdefault:CARD=imxaudiosgtl500
#root@imx6-rexultra:~# arecord -D sysdefault:CARD=imxaudiosgtl500 -t wav -f cd | aplay -D sysdefault:CARD=imxaudiosgtl500
</syntaxhighlight>

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

== User button ==
'''''Input:''''' Press and hold USER button (pca9535 driver is used) 
'''''Output:''''' GPIO register is read and displayed state of the button
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo 511 > /sys/class/gpio/export
root@imx6-rexultra:~# echo in > /sys/class/gpio/gpio511/direction
root@imx6-rexultra:~# cat /sys/class/gpio/gpio511/value
1
root@imx6-rexultra:~# cat /sys/class/gpio/gpio511/value
0
</syntaxhighlight>

== Reset button ==
'''''Input:''''' Press the RESET button 
'''''Output:''''' Module will execute bootloader immediately with "Reset cause: POR" 
'''''Note:''''' Module 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 2014.10-dirty (Mar 12 2016 - 11:34:54)

CPU: Freescale i.MX6Q rev1.2 at 792 MHz
Reset cause: POR
Board: MX6 Rex - ultra
I2C: ready
DRAM: 2 GiB
MMC: FSL_SDHC: 0, FSL_SDHC: 1
SF: Detected SST25VF032B with page size 256 Bytes, erase size 4 KiB, total 4 MiB
*** Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
Net: FEC [PRIME]
Hit any key to stop autoboot: 0
</syntaxhighlight>

== Ethernet ==
'''''Input:''''' None 
'''''Output:''''' Device driver is available 
'''''Note:''''' MAC address should be identical with the address on the sticker placed on module
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0d:15:00:cc:e2 brd ff:ff:ff:ff:ff:ff
inet6 fe80::20d:15ff:fe00:cce2/64 scope link
</syntaxhighlight>

'''''Input:''''' Plug Ethernet cable into connector and issue DHCP command 
'''''Output:''''' IPv4 address is assigned
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# dmesg | tail
...
libphy: 2188000.ethernet:03 - Link is Up - 100/Full
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
</syntaxhighlight>

<syntaxhighlight lang="bash">
root@imx6-rexultra:~# udhcpc -i eth0
udhcpc (v1.22.1) started
Sending discover...
Sending select for 192.168.0.178...
Lease of 192.168.0.178 obtained, lease time 600
</syntaxhighlight>

== HDMI Output ==
'''''Input:''''' Connect LCD monitor to baseboard 
'''''Output:''''' Desktop UI is correctly displayed 
[[image:iMX6_TinyRex_Development_kit-HDMI_terminal.jpg|600px]]

== I2C ==
'''''Input:''''' Scan I2C bus 0 
'''''Output:''''' Available devices: 
* SGTL5000 audio (0x0A)
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- UU -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
</syntaxhighlight>

'''''Input:''''' Scan I2C bus 1 
'''''Output:''''' Available devices: 
* GPIO expander (0x27)
* touchscreen TSC2007 (0x48)
* HDMI Output EDID (0x50)
* RTC clock (0x51)
* EEPROM (0x57)
'''''Note:''''' HDMI monitor must be disconnected otherwise I2C bus 1 scanning bus might freeze.
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
50: UU UU -- -- -- -- -- UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
</syntaxhighlight>

'''''Input:''''' Scan I2C bus 2 
'''''Output:''''' I2C bus 2 is allocated for external use via System Header 
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# 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 GPIO expander detection. 
'''''Output:''''' GPIO expander is detected
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo -n "1-0027" > /sys/bus/i2c/drivers/pca953x/unbind
root@imx6-rexultra:~# echo -n "1-0027" > /sys/bus/i2c/drivers/pca953x/bind
pca953x 1-0027: interrupt support not compiled in
</syntaxhighlight>

'''''Input:''''' Trigger I2C RTC detection 
'''''Output:''''' RTC is detected
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo -n "1-0051" > /sys/bus/i2c/drivers/rtc-pcf8563/unbind
root@imx6-rexultra:~# echo -n "1-0051" > /sys/bus/i2c/drivers/rtc-pcf8563/bind
rtc-pcf8563 1-0051: chip found, driver version 0.4.3
rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
rtc-pcf8563 1-0051: low voltage detected, date/time is not reliable.
rtc rtc1: invalid alarm value: 2030-10-20 41:58:0
rtc-pcf8563 1-0051: rtc core: registered rtc-pcf8563 as rtc1
</syntaxhighlight>

'''''Input:''''' Trigger I2C EEPROM detection 
'''''Output:''''' I2C EEPROM is detected
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo -n "1-0057" > /sys/bus/i2c/drivers/at24/unbind
root@imx6-rexultra:~# echo -n "1-0057" > /sys/bus/i2c/drivers/at24/bind
at24 1-0057: 256 byte 24c02 EEPROM, writable, 1 bytes/write
</syntaxhighlight>

'''''Input:''''' Write and Read data from I2C EEPROM 
'''''Output:''''' If successful, console text 'Data are the same' should appear
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo -n "0123" > eeprom_in
root@imx6-rexultra:~# cat eeprom_in > /sys/bus/i2c/devices/1-0057/eeprom
root@imx6-rexultra:~# head -c 4 /sys/bus/i2c/devices/1-0057/eeprom > eeprom_out
root@imx6-rexultra:~# 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 
'''''Output:''''' Available devices are displayed
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# ls /sys/bus/i2c/devices/i2c-0 | grep ^[0]
0-000a
root@imx6-rexultra:~# ls /sys/bus/i2c/devices/i2c-1 | grep ^[1]
1-0048
1-0050
root@imx6-rexultra:~# ls /sys/bus/i2c/devices/i2c-2 | grep ^[2]
</syntaxhighlight>

== User LED ==
'''''Input:''''' None 
'''''Output:''''' Red LED assembled on module switches from ON to OFF state with heartbeat pulses afterwards
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo -n "none" > /sys/devices/soc0/leds*/leds/module-led/trigger
root@imx6-rexultra:~# echo -n "1" > /sys/devices/soc0/leds*/leds/module-led/brightness
root@imx6-rexultra:~# echo -n "0" > /sys/devices/soc0/leds*/leds/module-led/brightness
root@imx6-rexultra:~# echo -n "heartbeat" > /sys/devices/soc0/leds*/leds/module-led/trigger
</syntaxhighlight>

'''''Input:''''' GPIO expander PCA9535 driver 
'''''Output:''''' Red LED assembled on baseboard switches from ON to OFF state
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo 510 > /sys/class/gpio/export
root@imx6-rexultra:~# echo out > /sys/class/gpio/gpio510/direction
root@imx6-rexultra:~# echo 1 > /sys/class/gpio/gpio510/value
root@imx6-rexultra:~# echo 0 > /sys/class/gpio/gpio510/value
</syntaxhighlight>

== LVDS display ==
Details how to properly connect display with LVDS and touchsreen interfaces are described on [[iMX6 Rex Display Set|Display Set page]]. 
'''''Input:''''' Configure U-Boot video environment and boot up the module 
'''''Output:''''' GUI can be seen on LVDS screen
<syntaxhighlight lang="bash">
Rex U-Boot > setenv video 'video=mxcfb0:dev=ldb,edt570,if=RGB666 video=mxcfb1:off'
Rex U-Boot > boot
</syntaxhighlight>

== DDR memory ==
'''''Input:''''' None 
'''''Output:''''' Memory test passes without any errors
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# 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 267MB (280412160 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 : ok
Compare AND : ok
Sequential Increment: ok
Solid Bits : ok
Block Sequential : ok
Checkerboard : ok
Bit Spread : ok
Bit Flip : ok
Walking Ones : ok
Walking Zeroes : ok

Done.
</syntaxhighlight> 

Further information about DDR3 memories and its calibration can be accessed in [[iMX6 Rex Memory Calibration|Memory Calibration details]].

== Modem ==
'''''Input:''''' Plug HE910 3G card into PCIe mini 2 slot and plug SIM card into SIM1 slot 
'''''Output:''''' HE910 3G card is detected and AT commands executed
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# lsusb | grep -i 1bc7
Bus 001 Device 003: ID 1bc7:0021 Telit HE910
</syntaxhighlight>

<syntaxhighlight lang="bash">
root@imx6-rexultra:~# cat > /etc/minirc.he910 << EOF
pu port /dev/ttyACM0
pu baudrate 115200
pu bits 8
pu parity N
pu stopbits 1
pu rtscts No
pu xonxoff No
pu escape-key ^B
EOF
root@imx6-rexultra:~# echo "Press 'Ctrl+B z q' to exit"
root@imx6-rexultra:~# minicom -o he910
AT
AT+CPIN?
AT+CREG?
AT+COPS?
</syntaxhighlight>

Log:
<syntaxhighlight lang="bash">
AT
OK
AT+CPIN?
+CPIN: READY

OK
AT+CREG?
+CREG: 0,1

OK
AT+COPS?
+COPS: 0,0,"Vodafone",0

OK
</syntaxhighlight>

== PCI Express ==
The procedure uses a WiFi wireless card to test PCIe interface. More details concerning wireless cards are located on [[iMX6 Rex Wireless|WiFi and Bluetooth Cards page]] . 

'''''Input:''''' Plug Wireless WiFi Link 4965AGN mini PCIe card into mini PCIe slot 1 
'''''Output:''''' Card is detected by system
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# lspci
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)
</syntaxhighlight>

'''''Input:''''' Plug Wireless WiFi Link 4965AGN mini PCIe card into mini PCIe slot 1 
'''''Output:''''' Wireless WiFi card firmware is loaded
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# dmesg | grep iwl4965
iwl4965: Intel(R) Wireless WiFi 4965 driver for Linux, in-tree:
iwl4965: Copyright(c) 2003-2011 Intel Corporation
iwl4965 0000:01:00.0: Detected Intel(R) Wireless WiFi Link 4965AGN, REV=0x4
iwl4965 0000:01:00.0: device EEPROM VER=0x36, CALIB=0x5
iwl4965 0000:01:00.0: Tunable channels: 13 802.11bg, 19 802.11a channels
iwl4965 0000:01:00.0: loaded firmware version 228.61.2.24
</syntaxhighlight>

'''''Input:''''' Plug Wireless WiFi Link 4965AGN mini PCIe card into mini PCIe slot 1 
'''''Output:''''' Card scans neighbour networks
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# rfkill unblock wlan
root@imx6-rexultra:~# ip link set wlan0 up
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
root@imx6-rexultra:~# iw dev wlan0 scan
BSS 20:aa:4b:7e:21:97(on wlan0)
TSF: 9263203904202 usec (107d, 05:06:43)
freq: 5220
beacon interval: 100 TUs
capability: ESS Privacy ShortPreamble (0x0031)
signal: -69.00 dBm
last seen: 0 ms ago
SSID: OpenWrt5g
Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
DS Parameter set: channel 44
Country: CZ Environment: Indoor/Outdoor
Channels [36 - 48] @ 23 dBm
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
WPA: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
Extended capabilities: 6
WMM: * Parameter version 1
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
</syntaxhighlight>

=== Alternative test ===
'''''Input:''''' Plug Wireless WiFi Link 4965AGN mini PCIe card into mini PCIe slot 1 
'''''Output:''''' Card scans neighbour networks
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# ip link set wlan0 up
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
root@imx6-rexultra:~# iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: 20:AA:4B:7E:21:97
Channel:44
Frequency:5.22 GHz (Channel 44)
Quality=39/70 Signal level=-71 dBm
Encryption key:on
ESSID:"OpenWrt5g"
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000086d2e342cf9
Extra: Last beacon: 40ms ago
IE: Unknown: 00094F70656E5772743567
IE: Unknown: 01088C129824B048606C
IE: Unknown: 03012C
IE: Unknown: 0706435A20240417
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 7F080000000000000040
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
</syntaxhighlight>

== SATA ==
'''''Input:''''' Power off the baseboard, connect HDD to SATA connector, provide power for the hard drive and turn on the board 
'''''Output:''''' HDD is detected
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# dmesg | grep -i -e sata -e ata1
ahci-imx 2200000.sata: fsl,transmit-level-mV not specified, using 00000024
ahci-imx 2200000.sata: fsl,transmit-boost-mdB not specified, using 00000480
ahci-imx 2200000.sata: fsl,transmit-atten-16ths not specified, using 00002000
ahci-imx 2200000.sata: fsl,receive-eq-mdB not specified, using 05000000
ahci-imx 2200000.sata: SSS flag set, parallel bus scan disabled
ahci-imx 2200000.sata: AHCI 0001.0300 32 slots 1 ports 3 Gbps 0x1 impl platform mode
ahci-imx 2200000.sata: flags: ncq sntf stag pm led clo only pmp pio slum part ccc apst
ata1: SATA max UDMA/133 mmio [mem 0x02200000-0x02203fff] port 0x100 irq 306
ata1: SATA link down (SStatus 0 SControl 300)
ahci-imx 2200000.sata: no device found, disabling link.
ahci-imx 2200000.sata: pass ahci_imx..hotplug=1 to enable hotplug
</syntaxhighlight>

SATA device can be used as a default filesystem source. [[iMX6 Rex SATA|SATA Interface page]] contains detailed steps to follow. iMX6 Rex Deveploment kit gives an alternate option of utilizing SATA interface and reliabale storage by supporting [[iMX6 Rex CFast Card|CFast Cards]].

== SD card ==

=== Top slot SD card (mmcblk1) ===
'''''Input:''''' Plug and unplug SD card 
'''''Output:''''' Kernel log shows that mmc1 device is added and removed
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# dmesg | tail
...
mmc1: new high speed SDHC card at address e624
mmcblk1: mmc1:e624 SU08G 7.40 GiB
mmcblk1: p1 p2
FAT-fs (mmcblk1p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
EXT4-fs (mmcblk1p2): recovery complete
EXT4-fs (mmcblk1p2): mounted filesystem with ordered data mode. Opts: (null)
mmc1: card e624 removed
</syntaxhighlight>

=== Bottom slot SD card (mmcblk2) ===
'''''Input:''''' Plug SD card with a filesystem and boot-up the module 
'''''Output:''''' Module boots up successfully
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# dmesg | grep -i "Kernel command line"
Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk2p2 rootwait rw
</syntaxhighlight>

== SPI Flash Memory ==
'''''Input:''''' Trigger M25P80 flash detection 
'''''Output:''''' SPI Flash sst25vf016b(sst25vf032b) is detected
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo -n "spi2.0" > /sys/bus/spi/drivers/m25p80/unbind
root@imx6-rexultra:~# echo -n "spi2.0" > /sys/bus/spi/drivers/m25p80/bind
m25p80 spi2.0: found sst25vf032b, expected m25p32
m25p80 spi2.0: sst25vf032b (4096 Kbytes)
</syntaxhighlight>

'''''Input:''''' Write and Read data from m25p80 flash 
'''''Output:''''' If successful, console text 'Data are the same' should appear
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# echo -n "0123" > mtd_in
root@imx6-rexultra:~# mtd_debug write /dev/mtd0 0 4 mtd_in
Copied 4 bytes from mtd_in to address 0x00000000 in flash
root@imx6-rexultra:~# mtd_debug read /dev/mtd0 0 4 mtd_out
Copied 4 bytes from address 0x00000000 in flash to mtd_out
root@imx6-rexultra:~# diff mtd_in mtd_out && echo "Data are the same"
Data are the same
</syntaxhighlight>

== UART serial console ==
'''''Input:''''' Connect RS-232 cable into baseboard connector and open serial console with baud rate 115200 8n1 
'''''Output:''''' The board is controlled and responsive to serial terminal commands
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# uname -a
Linux imx6-rexultra 3.14.58-yocto+g11e5ba3 #1 SMP PREEMPT Sun Mar 13 20:20:31 CET 2016 armv7l GNU/Linux
</syntaxhighlight>

== USB ==
'''''Input:''''' Plug USB flash drive with single VFAT partition into the bottom USB connector 
'''''Output:''''' Filesystem recognises the flash drive and automatically mounts it. SMC Hub with ID 0424:2514 is mounted
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# lsusb
Bus 001 Device 003: ID 1bc7:0021 Telit HE910
Bus 001 Device 005: ID 054c:0243 Sony Corp. MicroVault Flash Drive
Bus 001 Device 004: ID 0930:6544 Toshiba Corp. Kingston DataTraveler 2.0 Stick (2GB)
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

root@imx6-rexultra:~# mount | grep /run/media/sd*
/dev/sda1 on /run/media/sda1 type vfat (rw,relatime,gid=6,fmask=0007,dmask=0007,allow_utime=0020,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
</syntaxhighlight>

'''''Input:''''' Generate a dummy file and copy it into USB flash drive 
'''''Output:''''' Generated file and copied file have the same checksum
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# rm -f file.txt /run/media/sda1/file.txt
root@imx6-rexultra:~# dd if=/dev/urandom of=file.txt count=1024 bs=1024
1024+0 records in
1024+0 records out
1048576 bytes (1.0 MB) copied, 0.435456 s, 2.4 MB/s
root@imx6-rexultra:~# cp file.txt /run/media/sda1/
root@imx6-rexultra:~# md5sum file.txt /run/media/sda1/file.txt
33ef96efccbbf570bfce477735ed2068 file.txt
33ef96efccbbf570bfce477735ed2068 /run/media/sda1/file.txt
root@imx6-rexultra:~# rm file.txt /run/media/sda1/file.txt
</syntaxhighlight>

== USB OTG ==
'''''Input:''''' Load USB serial gadget driver and connect baseboard to host PC over micro USB cable 
'''''Output:''''' Driver is successfully loaded and host PC detects a new USB serial gadget device 

iMX6 Rex Development kit:
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# modprobe -i g_serial
g_serial gadget: Gadget Serial v2.4
g_serial gadget: g_serial ready
root@imx6-rexultra:~# g_serial gadget: high-speed config #2: CDC ACM config
</syntaxhighlight>

Host PC:
<syntaxhighlight lang="bash">
user@voipac:~$ lsusb
...
Bus 001 Device 014: ID 0525:a4a7 Netchip Technology, Inc. Linux-USB Serial Gadget (CDC ACM mode)
...
</syntaxhighlight>

== Touchscreen ==
Details how to properly connect display with LVDS and touchsreen interfaces are described on [[iMX6 Rex Display Set|Display Set page]]. 

'''''Input:''''' Search kernel log for TSC2007 chip 
'''''Output:''''' TSC2007 chip is detected and bound as an input device
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# dmesg | grep -i tsc2007
input: TSC2007 Touchscreen as /devices/soc0/soc.0/2100000.aips-bus/21a4000.i2c/i2c-1/1-0048/input/input0
evbug: Connected device: input0 (TSC2007 Touchscreen at 1-0048/input0)
</syntaxhighlight>

'''''Input:''''' Press the touchscreen 
'''''Output:''''' Touchscreen events are generated
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# evtest /dev/input/by-path/platform-21a4000.i2c-event
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
Input device name: "TSC2007 Touchscreen"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 330 (BTN_TOUCH)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 3529
Min 0
Max 4095
Event code 1 (ABS_Y)
Value 375
Min 0
Max 4095
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 4095
Properties:
Testing ... (interrupt to exit)
Event: time 1457899907.959665, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
Event: time 1457899907.959665, type 3 (EV_ABS), code 0 (ABS_X), value 1657
Event: time 1457899907.959665, type 3 (EV_ABS), code 1 (ABS_Y), value 2486
Event: time 1457899907.959665, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 3268
Event: time 1457899907.959665, -------------- EV_SYN ------------
Event: time 1457899907.969094, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0
Event: time 1457899907.969094, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 0
Event: time 1457899907.969094, -------------- EV_SYN ------------
</syntaxhighlight>

=== Alternative test ===
'''''Input:''''' Press the touchscreen 
'''''Output:''''' Touchscreen events are generated
<syntaxhighlight lang="bash">
root@imx6-rexultra:~# hexdump -C /dev/input/event0
00000000 79 ca e5 56 cd a3 07 00 01 00 4a 01 01 00 00 00 |y..V......J.....|
00000010 79 ca e5 56 cd a3 07 00 03 00 00 00 2f 08 00 00 |y..V......../...|
00000020 79 ca e5 56 cd a3 07 00 03 00 01 00 a7 07 00 00 |y..V............|
00000030 79 ca e5 56 cd a3 07 00 03 00 18 00 64 06 00 00 |y..V........d...|
00000040 79 ca e5 56 cd a3 07 00 00 00 00 00 00 00 00 00 |y..V............|
00000050 79 ca e5 56 a7 c4 07 00 01 00 4a 01 00 00 00 00 |y..V......J.....|
00000060 79 ca e5 56 a7 c4 07 00 03 00 18 00 00 00 00 00 |y..V............|
00000070 79 ca e5 56 a7 c4 07 00 00 00 00 00 00 00 00 00 |y..V............|
</syntaxhighlight>

@@ Line 168: / Line 168: @@
 '''''Input:''''' Connect LCD monitor to the base board<br />
 '''''Output:''''' Desktop UI is displayed correctly<br />
-[[image:iMX6_TinyRex_Development_kit-HDMI_terminal.png|580px]]
+[[image:iMX6_TinyRex_Development_Kit-HDMI_terminal.png|580px]]
 == I2C ==

@@ Line 168: / Line 168: @@
 '''''Input:''''' Connect LCD monitor to the base board<br />
 '''''Output:''''' Desktop UI is displayed correctly<br />
-[[image:iMX6_TinyRex_Development_kit-HDMI_terminal.jpg|600px]]
+[[image:iMX6_TinyRex_Development_kit-HDMI_terminal.png|580px]]
 == I2C ==

@@ Line 167: / Line 167: @@
 == HDMI Output ==
 '''''Input:''''' Connect LCD monitor to the base board<br />
-'''''Output:''''' Desktop UI is correctly displayed<br />
+'''''Output:''''' Desktop UI is displayed correctly<br />
 [[image:iMX6_TinyRex_Development_kit-HDMI_terminal.jpg|600px]]

@@ Line 11: / Line 11: @@
 * DC power supply (12V, 1A)
 * iMX6 Rex Module UltraPlus
-* iMX6 Rex Baseboard
+* iMX6 Rex Base Board
 === Peripherals and Accessories ===
@@ Line 166: / Line 166: @@
 == HDMI Output ==
-'''''Input:''''' Connect LCD monitor to baseboard<br />
+'''''Input:''''' Connect LCD monitor to the base board<br />
 '''''Output:''''' Desktop UI is correctly displayed<br />
 [[image:iMX6_TinyRex_Development_kit-HDMI_terminal.jpg|600px]]
@@ Line 284: / Line 284: @@
 '''''Input:''''' GPIO expander PCA9535 driver<br />
-'''''Output:''''' Red LED assembled on baseboard switches from ON to OFF state
+'''''Output:''''' Red LED assembled on the base board switches from ON to OFF state
 <syntaxhighlight lang="bash">
 root@imx6-rexultra:~# echo 510 > /sys/class/gpio/export
@@ Line 477: / Line 477: @@
 == SATA ==
-'''''Input:''''' Power off the baseboard, connect HDD to SATA connector, provide power for the hard drive and turn on the board<br />
+'''''Input:''''' Power off the base board, connect HDD to SATA connector, provide power for the hard drive and turn on the board<br />
 '''''Output:''''' HDD is detected
 <syntaxhighlight lang="bash">
@@ Line 544: / Line 544: @@
 == UART serial console ==
-'''''Input:''''' Connect RS-232 cable into baseboard connector and open serial console with baud rate 115200 8n1<br />
+'''''Input:''''' Connect RS-232 cable into the base board connector and open serial console with baud rate 115200 8n1<br />
 '''''Output:''''' The board is controlled and responsive to serial terminal commands
 <syntaxhighlight lang="bash">
@@ Line 583: / Line 583: @@
 == USB OTG ==
-'''''Input:''''' Load USB serial gadget driver and connect baseboard to host PC over micro USB cable<br />
+'''''Input:''''' Load USB serial gadget driver and connect base board to host PC over micro USB cable<br />
 '''''Output:''''' Driver is successfully loaded and host PC detects a new USB serial gadget device<br /><br />

@@ Line 261: / Line 261: @@
 </syntaxhighlight>
-=== Altarnative test ===
+=== Alternative test ===
 '''''Input:''''' List I2C bus 0, 1 and 2<br />
 '''''Output:''''' Available devices are displayed

@@ Line 1: / Line 1: @@
-[[Category:iMX6 Rex Development kit]]
+[[Category:iMX6 Rex Development Kit]]
 [[Category:iMX6 Rex UltraPlus]]
 [[Category:iMX6 Rex Peripherals]]
@@ Line 5: / Line 5: @@
 <div style="float:right">__TOC__</div>
-Elemental operations of iMX6 Rex Development kit interfaces in UltraPlus configuration are shown on this page.
+Elemental operations of iMX6 Rex Development Kit interfaces in UltraPlus configuration are shown on this page.
 == Prerequisites ==
@@ Line 494: / Line 494: @@
 </syntaxhighlight>
-SATA device can be used as a default filesystem source. [[iMX6 Rex SATA|SATA Interface page]] contains detailed steps to follow. iMX6 Rex Deveploment kit gives an alternate option of utilizing SATA interface and reliabale storage by supporting [[iMX6 Rex CFast Card|CFast Cards]].
+SATA device can be used as a default filesystem source. [[iMX6 Rex SATA|SATA Interface page]] contains detailed steps to follow. iMX6 Rex Deveploment Kit gives an alternate option of utilizing SATA interface and reliable storage by supporting [[iMX6 Rex CFast Card|CFast Cards]].
 == SD card ==
@@ Line 586: / Line 586: @@
 '''''Output:''''' Driver is successfully loaded and host PC detects a new USB serial gadget device<br /><br />
-iMX6 Rex Development kit:
+iMX6 Rex Development Kit:
 <syntaxhighlight lang="bash">
 root@imx6-rexultra:~# modprobe -i g_serial

@@ Line 531: / Line 531: @@
 </syntaxhighlight>
-'''''Input:''''' Write and read data from m25p80 flash<br />
+'''''Input:''''' Write and read data from M25P80 flash<br />
 '''''Output:''''' If successful, console text 'Data are the same' should appear
 <syntaxhighlight lang="bash">