Difference between revisions of "i.MX25 SODIMM PC Accessing and Testing Peripherals"

Revision as of 00:40, 22 April 2021

Basic examples of operation of i.MX25 SODIMM PC - Development kit interfaces are shown on this page.

Prerequisites

Hardware

DC power supply (12V, 2A)
i.MX25 SODIMM PC Module
i.MX25 SODIMM PC Base Board

Peripherals and Accessories

1x DVI/VGA monitor
1x MicroSD card
2x USB Flash drive
1x headphones
1x microphone
touch panel

Cables

Ethernet cable
DVI cable or VGA cable
Mini USB cable
RS-232 cable

Audio

Input: Search kernel log for SGTL5000 chip
Output: Audio chip is detected and bound as an input device

root@vmx25:~# dmesg | grep -i sgtl5000
sgtl5000 0-000a: sgtl5000 revision 0x11
sgtl5000 0-000a: Using internal LDO instead of VDDD: check ER1
imx-sgtl5000 sound: sgtl5000 <-> 50034000.ssi mapping ok
  #0: imx25-vmx25-sgtl5000

Input: Run alsamixer command
Output: Card imx-audio-sgtl5000 is available

root@vmx25:~# alsamixer
lqqqqqqqqqqqqqqqqqqqqqqqqqqqqq AlsaMixer v1.1.4 qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk
x Card: imx25-vmx25-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: -15.00, -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          xaax          x
x        x  x                                      xaax          xaax          x
x        x  x                                      xaax          xaax          x
x        x  x                                      xaax          xaax          x
x        x  x                                      xaax          xaax          x
x        xaax                                      xaax          xaax          x
x        xaax                                      xaax          xaax          x
x        xaax                                      xaax          xaax          x
x        xaax                                      xaax          xaax          x
x        tqqu           DAC          lqqk          mqqj          tqqu          x
x        xOOx                        xOOx                        xOOx          x
x        mqqj                        mqqj                        mqqj          x
x       23<>23                                    75<>75        58<>58         x
x   <  Headphone  >Headphone Mux Headphone Pla      PCM         Lineout        x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj

Input: Plug headphones into HP_OUT connector
Output: Audio media is played into the headphones

root@vmx25:~# aplay multimedia/sample.wav
Playing WAVE 'multimedia/sample.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

root@vmx25:~# aplay -D sysdefault:CARD=imx25vmx25sgtl5 multimedia/sample.wav
Playing WAVE 'multimedia/sample.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

Input: Plug headphones into HP_OUT and microphone into LINE_IN connector
Output: Microphone sound is played in headphones

root@vmx25:~# arecord -D sysdefault:CARD=imx25vmx25sgtl5 -t wav -f cd | aplay -D sysdefault:CARD=imx25vmx25sgtl5
Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

Input: Plug headphones with microphone feature into HP_OUT connector
Output: Sound is recorded and played afterwards

root@vmx25:~# arecord -D sysdefault:CARD=imx25vmx25sgtl5 -t wav -f cd -d 10 multimedia/recorded.wav
Recording WAVE 'multimedia/recorded.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
root@vmx25:~# aplay -D sysdefault:CARD=imx25vmx25sgtl5 multimedia/recorded.wav
Playing WAVE 'multimedia/recorded.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

User button

Input: Press the Home/Vol-/Vol+/Back buttons
Output: Button events are generated and received

root@vmx25:~# evtest /dev/input/by-path/platform-43fa8000.kpp-event
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x0 product 0x0 version 0x0
Input device name: "43fa8000.kpp"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 102 (KEY_HOME)
    Event code 114 (KEY_VOLUMEDOWN)
    Event code 115 (KEY_VOLUMEUP)
    Event code 158 (KEY_BACK)
  Event type 4 (EV_MSC)
    Event code 4 (MSC_SCAN)
Key repeat handling:
  Repeat type 20 (EV_REP)
    Repeat code 0 (REP_DELAY)
      Value    250
    Repeat code 1 (REP_PERIOD)
      Value     33
Properties:
Testing ... (interrupt to exit)
Event: time 1525810879.083353, type 4 (EV_MSC), code 4 (MSC_SCAN), value 01
Event: time 1525810879.083353, type 1 (EV_KEY), code 102 (KEY_HOME), value 1
Event: time 1525810879.083353, -------------- SYN_REPORT ------------
Event: time 1525810879.243271, type 4 (EV_MSC), code 4 (MSC_SCAN), value 01
Event: time 1525810879.243271, type 1 (EV_KEY), code 102 (KEY_HOME), value 0
Event: time 1525810879.243271, -------------- SYN_REPORT ------------
Event: time 1525810880.293285, type 4 (EV_MSC), code 4 (MSC_SCAN), value 11
Event: time 1525810880.293285, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 1
Event: time 1525810880.293285, -------------- SYN_REPORT ------------
Event: time 1525810880.443263, type 4 (EV_MSC), code 4 (MSC_SCAN), value 11
Event: time 1525810880.443263, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 0
Event: time 1525810880.443263, -------------- SYN_REPORT ------------
Event: time 1525810881.213298, type 4 (EV_MSC), code 4 (MSC_SCAN), value 03
Event: time 1525810881.213298, type 1 (EV_KEY), code 158 (KEY_BACK), value 1
Event: time 1525810881.213298, -------------- SYN_REPORT ------------
Event: time 1525810881.353266, type 4 (EV_MSC), code 4 (MSC_SCAN), value 03
Event: time 1525810881.353266, type 1 (EV_KEY), code 158 (KEY_BACK), value 0
Event: time 1525810881.353266, -------------- SYN_REPORT ------------
Event: time 1525810882.133271, type 4 (EV_MSC), code 4 (MSC_SCAN), value 13
Event: time 1525810882.133271, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 1
Event: time 1525810882.133271, -------------- SYN_REPORT ------------
Event: time 1525810882.263273, type 4 (EV_MSC), code 4 (MSC_SCAN), value 13
Event: time 1525810882.263273, type 1 (EV_KEY), code 115 (KEY_VOLUMEUP), value 0
Event: time 1525810882.263273, -------------- SYN_REPORT ------------

Alternate test

Input: Press the Home/Vol-/Vol+/Back buttons
Output: Button events are generated and received

root@vmx25:~# hexdump -C /dev/input/by-path/platform-43fa8000.kpp-event 
00000000  4f 8a f8 5a cf 05 04 00  04 00 04 00 01 00 00 00  |O..Z............|
00000010  4f 8a f8 5a cf 05 04 00  01 00 66 00 01 00 00 00  |O..Z......f.....|
00000020  4f 8a f8 5a cf 05 04 00  00 00 00 00 00 00 00 00  |O..Z............|
00000030  4f 8a f8 5a 7f 01 06 00  04 00 04 00 01 00 00 00  |O..Z............|
00000040  4f 8a f8 5a 7f 01 06 00  01 00 66 00 00 00 00 00  |O..Z......f.....|
00000050  4f 8a f8 5a 7f 01 06 00  00 00 00 00 00 00 00 00  |O..Z............|
00000060  4f 8a f8 5a 7c bc 0a 00  04 00 04 00 11 00 00 00  |O..Z|...........|
00000070  4f 8a f8 5a 7c bc 0a 00  01 00 72 00 01 00 00 00  |O..Z|.....r.....|
00000080  4f 8a f8 5a 7c bc 0a 00  00 00 00 00 00 00 00 00  |O..Z|...........|
00000090  4f 8a f8 5a 3c b8 0c 00  04 00 04 00 11 00 00 00  |O..Z<...........|
000000a0  4f 8a f8 5a 3c b8 0c 00  01 00 72 00 00 00 00 00  |O..Z<.....r.....|
000000b0  4f 8a f8 5a 3c b8 0c 00  00 00 00 00 00 00 00 00  |O..Z<...........|
000000c0  50 8a f8 5a 4b cd 02 00  04 00 04 00 03 00 00 00  |P..ZK...........|
000000d0  50 8a f8 5a 4b cd 02 00  01 00 9e 00 01 00 00 00  |P..ZK...........|
000000e0  50 8a f8 5a 4b cd 02 00  00 00 00 00 00 00 00 00  |P..ZK...........|
000000f0  50 8a f8 5a fe c8 04 00  04 00 04 00 03 00 00 00  |P..Z............|
00000100  50 8a f8 5a fe c8 04 00  01 00 9e 00 00 00 00 00  |P..Z............|
00000110  50 8a f8 5a fe c8 04 00  00 00 00 00 00 00 00 00  |P..Z............|
00000120  50 8a f8 5a 10 5d 09 00  04 00 04 00 13 00 00 00  |P..Z.]..........|
00000130  50 8a f8 5a 10 5d 09 00  01 00 73 00 01 00 00 00  |P..Z.]....s.....|
00000140  50 8a f8 5a 10 5d 09 00  00 00 00 00 00 00 00 00  |P..Z.]..........|
00000150  50 8a f8 5a ce a6 0b 00  04 00 04 00 13 00 00 00  |P..Z............|
00000160  50 8a f8 5a ce a6 0b 00  01 00 73 00 00 00 00 00  |P..Z......s.....|
00000170  50 8a f8 5a ce a6 0b 00  00 00 00 00 00 00 00 00  |P..Z............|

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

barebox 2017.12.0-g952939f-dirty #3 Sat May 26 21:21:42 CEST 2018


Board: Voipac VMX25
SDRAM at 0x80000000: 32MB (256Mb, 13 ROWs, 9 COLs)
SDRAM at 0x90000000: 32MB (256Mb, 13 ROWs, 9 COLs)
mdio_bus: miibus0: probed
nand: ONFI flash detected
nand: NAND device: Manufacturer ID: 0x2c, Chip ID: 0xda (Micron MT29F2G08ABAEAWP), 256MiB, page size: 2048, OOB size: 64
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
netconsole: registered as netconsole-1
malloc space: 0x90efd700 -> 0x91dfadff (size 15 MiB)
running /env/bin/init...
DTB: /env/dtb/imx25-voipac-vmx25-264.dtb

Hit m for menu or any other key to stop autoboot:    0

CAN

Input: None
Output: Device driver is registered and ready for use

root@vmx25:~# ip addr show dev can0
3: can0: <NOARP40000> mtu 16 qdisc noop qlen 10
    link/[280] 
root@vmx25:~# ip addr show dev can1
4: can1: <NOARP40000> mtu 16 qdisc noop qlen 10
    link/[280]

Ethernet

Input: None
Output: Device driver is available
Note: MAC address should be identical with the address on the sticker placed on module

oot@vmx25:~# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0d:15:00:aa:13 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.11/24 brd 192.168.1.255 scope global eth0
       valid_lft forever preferred_lft forever

Input: Plug Ethernet cable into connector and issue DHCP command
Output: IPv4 address is assigned

root@vmx25:~# dmesg | tail
...
fec 50038000.ethernet eth0: Link is Down
fec 50038000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx

root@vmx25:~# udhcpc -i eth0
udhcpc (v1.24.1) started
Sending discover...
Sending select for 192.168.1.11...
Lease of 192.168.1.11 obtained, lease time 600
/etc/udhcpc.d/50default: Adding DNS 192.168.1.1
/etc/udhcpc.d/50default: Adding DNS 192.168.1.2

DVI output

Input: Connect LCD monitor to the base board
Output: Desktop UI is displayed correctly

I2C

Input: Scan I2C bus 0
Output: Available devices:

SGTL5000 audio (0x0A)
EEPROM memory (0x56/0x57)
real time clock DS1339 (0x68)

root@vmx25:~# 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: -- -- -- -- -- -- UU UU -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --

Input: Trigger I2C EEPROM detection
Output: I2C EEPROM is detected

root@vmx25:~# echo -n "0-0056" > /sys/bus/i2c/drivers/at24/unbind
root@vmx25:~# echo -n "0-0056" > /sys/bus/i2c/drivers/at24/bind 
at24 0-0056: 65536 byte 24c512 EEPROM, writable, 128 bytes/write

root@vmx25:~# echo -n "0-0057" > /sys/bus/i2c/drivers/at24/unbind
root@vmx25:~# echo -n "0-0057" > /sys/bus/i2c/drivers/at24/bind 
at24 0-0057: 65536 byte 24c512 EEPROM, writable, 128 bytes/write

Alternate test

Input: Scan I2C bus 0
Output: Available devices:

SGTL5000 audio (0x0A)
EEPROM memory (0x56/0x57)
real time clock DS1339 (0x68)

root@vmx25:~# ls /sys/bus/i2c/devices/i2c-0 | grep ^[0]
0-000a
0-0056
0-0057
0-0068

User LED

Input: None
Output: Script switches User LED ON and OFF in one second intervals

root@vmx25:~#
for LED in /sys/devices/platform/leds/leds/*
do
	echo Testing ${LED}
	echo -n "gpio" >  ${LED}/trigger
	sleep 1
	echo -n "1" > ${LED}/brightness
	sleep 1
	echo -n "0" > ${LED}/brightness
	sleep 1
done

root@vmx25:~# echo -n "heartbeat" >  /sys/devices/platform/leds/leds/led1/trigger
root@vmx25:~# echo -n "mmc0" > /sys/devices/platform/leds/leds/led2/trigger

DDR memory

Input: None
Output: Memory test passes without any errors

root@vmx25:~# memtester 32M 1
memtester version 4.3.0 (32-bit)
Copyright (C) 2001-2012 Charles Cazabon.
Licensed under the GNU General Public License version 2 (only).

pagesize is 4096
pagesizemask is 0xfffff000
want 32MB (33554432 bytes)
got  32MB (33554432 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.

NAND memory

Input: Check file system free disk space
Output: Rootfs is UBI type and free space is available

root@vmx25:~# df -h
Filesystem                Size      Used Available Use% Mounted on
ubi0:rootfs             109.1M     45.4M     63.8M  42% /
devtmpfs                 27.5M         0     27.5M   0% /dev
tmpfs                    27.6M     76.0K     27.5M   0% /run
tmpfs                    27.6M     40.0K     27.6M   0% /var/volatile

RTC clock

Input: Search kernel log for DS1307.
Output: RTC chip was detected

root@vmx25:~# dmesg | grep -i ds1307
rtc-ds1307 0-0068: SET TIME!
rtc-ds1307 0-0068: registered as rtc0
rtc-ds1307 0-0068: setting system clock to 2000-01-01 00:34:09 UTC (946686849)

SD card

Input: Plug micro SD card into slot located on the module. Boot up the system
Output: Linux kernel detects inserted MMC0 device

root@vmx25:~# dmesg | grep -i 'sdhc\|mmc0'
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
mmc0 bounce up to 128 segments into one, max segment size 65536 bytes
mmc0: SDHCI controller on 53fb4000.esdhc [53fb4000.esdhc] using DMA
mmc0: host does not support reading read-only switch, assuming write-enable
mmc0: new high speed SDHC card at address 59b4
mmcblk0: mmc0:59b4 SS04G 3.69 GiB

SPI Flash

Input: Trigger M25P80 flash detection
Output: SPI flash sst25vf032b is detected

root@vmx25:~# echo -n "spi0.0" > /sys/bus/spi/drivers/m25p80/unbind
root@vmx25:~# echo -n "spi0.0" > /sys/bus/spi/drivers/m25p80/bind 
m25p80 spi0.0: found sst25vf032b, expected m25p80
m25p80 spi0.0: sst25vf032b (4096 Kbytes)
root@vmx25:~# echo -n "spi0.1" > /sys/bus/spi/drivers/m25p80/unbind
root@vmx25:~# echo -n "spi0.1" > /sys/bus/spi/drivers/m25p80/bind
m25p80 spi0.1: found sst25vf032b, expected m25p80
m25p80 spi0.1: sst25vf032b (4096 Kbytes)

Input: Write and read data from M25P80 flash
Output: If successful, console text 'Data are the same' should appear

root@vmx25:~# mtdinfo /dev/mtd4
mtd4
Name:                           spi0.0
Type:                           nor
Eraseblock size:                4096 bytes, 4.0 KiB
Amount of eraseblocks:          1024 (4194304 bytes, 4.0 MiB)
Minimum input/output unit size: 1 byte
Sub-page size:                  1 byte
Character device major/minor:   90:8
Bad blocks are allowed:         false
Device is writable:             true

root@vmx25:~# echo -n "0123" > mtd_in
root@vmx25:~# mtd_debug write /dev/mtd4 0 4 mtd_in
Copied 4 bytes from mtd_in to address 0xffffffff00000000 in flash
root@vmx25:~# mtd_debug read /dev/mtd4 0 4 mtd_out
Copied 4 bytes from address 0xbed5ef1600000000 in flash to (null)
root@vmx25:~# diff mtd_in mtd_out && echo "Data are the same"
Data are the same

Suspend

Input: Put the board into suspend state (mem state). Wait 10 seconds and then press HOME button
Output: The board wakes up

root@vmx25:~# echo mem > /sys/power/state
PM: suspend entry (deep)
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.002 seconds) done.
OOM killer disabled.
Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
OOM killer enabled.
Restarting tasks ... done.
PM: suspend exit
root@vmx25:~#

Touchscreen

Input: Connect touch panel into the base board connector, power up the board and press the panel
Output: Touch events are detected

root@vmx25:~# evtest /dev/input/by-path/platform-43fa4000.cspi-event 
Input driver version is 1.0.1
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "ADS7846 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   2409
      Min        0
      Max     8000
    Event code 1 (ABS_Y)
      Value   2129
      Min        0
      Max     4800
    Event code 24 (ABS_PRESSURE)
      Value      0
      Min        0
      Max      255
Properties:
Testing ... (interrupt to exit)
Event: time 1527375683.885927, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
Event: time 1527375683.885927, type 3 (EV_ABS), code 0 (ABS_X), value 2223
Event: time 1527375683.885927, type 3 (EV_ABS), code 1 (ABS_Y), value 1562
Event: time 1527375683.885927, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 58
Event: time 1527375683.885927, -------------- SYN_REPORT ------------
Event: time 1527375683.905846, type 3 (EV_ABS), code 0 (ABS_X), value 2226
Event: time 1527375683.905846, type 3 (EV_ABS), code 1 (ABS_Y), value 1572
Event: time 1527375683.905846, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 7
Event: time 1527375683.905846, -------------- SYN_REPORT ------------
Event: time 1527375683.924951, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0
Event: time 1527375683.924951, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 0
Event: time 1527375683.924951, -------------- SYN_REPORT ------------

UART serial console

Input: Connect RS-232 cable into the base board connector and open serial console with baud rate 115200 8n1
Output: The board is controlled and responsive to serial terminal commands

root@vmx25:~# uname -a
Linux vmx25 4.14.21-yocto+g4a31b3d #2 PREEMPT Sat May 26 19:51:25 UTC 2018 armv5tejl GNU/Linux

USB

Input: Plug USB flash drives with single VFAT partition into the USB connectors
Output: USB Flash drives are listed and mounted without any errors

root@vmx25:~# lsusb
Bus 001 Device 004: ID 125f:d31a A-DATA Technology Co., Ltd. 
Bus 001 Device 003: ID 125f:d31a A-DATA Technology Co., Ltd. 
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@vmx25:~# mount /dev/sda1 /media/

Input: Plug USB flash drive into mini USB connector. A link should be placed on H401 jumper
Output: Plugged USB device is listed

root@vmx25:~# lsusb
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
Bus 002 Device 003: ID 125f:d31a A-DATA Technology Co., Ltd. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Input: Generate a dummy file and copy it into USB flash drive
Output: Generated file and copied file have the same checksum

root@vmx25:~# rm -f file.txt /media/file.txt 
root@vmx25:~# dd if=/dev/urandom of=file.txt count=1024 bs=1024
1024+0 records in
1024+0 records out
root@vmx25:~# cp file.txt /media/
root@vmx25:~# md5sum file.txt /media/file.txt 
200a9fd3e9850fcedf85ed50d4c4733d  file.txt
200a9fd3e9850fcedf85ed50d4c4733d  /media/file.txt
root@vmx25:~# rm file.txt /media/file.txt
root@vmx25:~# umount /media

USB OTG

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

i.MX25 SODIMM PC - Development kit:

root@vmx25:~# modprobe -i g_serial
g_serial gadget: Gadget Serial v2.4
g_serial gadget: g_serial ready
g_serial gadget: high-speed config #2: CDC ACM config

Host PC:

user@voipac:~$ lsusb 
...
Bus 003 Device 012: ID 0525:a4a7 Netchip Technology, Inc. Linux-USB Serial Gadget (CDC ACM mode)
...

DVI output

Input: Connect VGA monitor to the base board
Output: Desktop UI is displayed correctly

@@ Line 358: / Line 358: @@
 == NAND memory ==
 '''''Input:''''' Check file system free disk space<br />
-'''''Output: Rootfs is UBI type and free space is available'''''
+'''''Output:''''' Rootfs is UBI type and free space is available
 <syntaxhighlight lang="bash">
 root@vmx25:~# df -h

Difference between revisions of "i.MX25 SODIMM PC Accessing and Testing Peripherals"

Revision as of 00:40, 22 April 2021

Contents

Prerequisites

Hardware

Peripherals and Accessories

Cables

Audio

User button

Alternate test

Reset button

CAN

Ethernet

DVI output

I2C

Alternate test

User LED

DDR memory

NAND memory

RTC clock

SD card

SPI Flash

Suspend

Touchscreen

UART serial console

USB

USB OTG

DVI output

Navigation menu

Search