Premier Farnell Embest EVK-PH8800 User manual

EVK-PH8800 User Manual
Embest Technology Co. Ltd | http://www.embest-tech.com 1
User Manual
[EVK-PH8800]

EVK-PH8800 User Manual
Embest Technology Co. Ltd | http://www.embest-tech.com 2
Revision History
Rev. Note Author
20160307 Initial Baijy
20160314 Translate Sandy
20160315 Add RS485-1 Test.
Modify the name of dtb files.
Baijy
20160323 Add WIFI and Bluetooth test
Add PWRON RESETn Keypad test
Modify some wrong instructions
Rongdong
20160331 Add CAN test Baijy
20160511 Update the result of instructions to the newest version
Modify the ETH interface of U-boot from ETH0 to ETH1
Sandy
20160622 Rev01 Release Sandy

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Catalog
Revision History ........................................................................................................................................................... 2
Catalog ......................................................................................................................................................................... 3
Release Note ................................................................................................................................................................ 5
1. Images Version ............................................................................................................................................. 5
2. Feature List................................................................................................................................................... 5
3. Known Issues ............................................................................................................................................... 6
Chapter 1 Quick Start ............................................................................................................................................... 7
1.1 Burn the System Images to the SD Card .................................................................................................. 7
1.2 System Boot from SD Card ....................................................................................................................... 8
1.3 System Boot from SPI Flash ..................................................................................................................... 9
Chapter 2 Function test .......................................................................................................................................... 11
2.1 LED ......................................................................................................................................................... 11
2.2 Button .................................................................................................................................................... 11
2.2.1 KEY_MENU, KEY_BACK............................................................................................................... 11
2.2.2 PWRON_RESETn ......................................................................................................................... 12
2.3 RTC ......................................................................................................................................................... 13
2.4 EEPROM ................................................................................................................................................. 13
2.5 EMMC .................................................................................................................................................... 14
2.6 ADC ........................................................................................................................................................ 15
2.7 Buzzer..................................................................................................................................................... 15
2.8 Audio ...................................................................................................................................................... 15
2.9 HDMI/VGA ............................................................................................................................................. 16
2.10 LCD ......................................................................................................................................................... 16
2.11 Backlight................................................................................................................................................. 16
2.12 Touchscreen ........................................................................................................................................... 16
2.13 Serial ...................................................................................................................................................... 16
2.13.1 UART1 ........................................................................................................................................ 16
2.13.2 UART4 ........................................................................................................................................ 17
2.14 RS485 ..................................................................................................................................................... 18
2.14.1 RS485-2 and RS485-3 ................................................................................................................. 18
2.14.2 RS485-1 and RS485-2 ................................................................................................................. 18
2.15 CAN ........................................................................................................................................................ 19

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2.16 Network ................................................................................................................................................. 19
2.17 USB ......................................................................................................................................................... 19
2.17.1 USB Host .................................................................................................................................... 19
2.17.2 USB OTG ..................................................................................................................................... 20
2.18 WIFI ........................................................................................................................................................ 21
2.18.1 Configure WIFI Antennas ........................................................................................................... 21
2.18.2 Connect WIFI .............................................................................................................................. 22
2.19 Bluetooth Test ........................................................................................................................................ 24
2.19.1 Reset Bluetooth Module ............................................................................................................ 24
2.19.2 Initialize the Bluetooth Module ................................................................................................. 24
2.19.3 Bluetooth Scan Test.................................................................................................................... 24
Chapter 3 System Compilation ............................................................................................................................... 25
3.1 Building Development Environment ...................................................................................................... 25
3.2 Compiling U-Boot ................................................................................................................................... 25
3.2.1 Get the U-Boot Source Code ...................................................................................................... 25
3.2.2 Compile and Burn the Images to SD Card .................................................................................. 25
3.2.3 Compile and Burn the Images to SPI Flash ................................................................................ 25
3.3 Compiling Kernel .................................................................................................................................... 26
3.3.1 Get Kernel Source Code ............................................................................................................. 26
3.3.2 Compile and Burn the Images to SD Card .................................................................................. 26

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Release Note
1. Images Version
EVK-PH8800-Release-SDcard-EMMC-REV01.img
2. Feature List
Feature List
EVK-PH8800
Schematic
Page#
On-Chip
Peripherals
On-Board
Peripherals Detail Functions(existing)
u-boot version 2015.09 Supports kernel boot
kernel version 4.1.6 Supports all below functionality
Filesystem Default root file system used by
debian
CPU PH8800-U11 AM437X_ZDN Null
DDRAM PH8800-p7-u12/u7 DDR MT41K256M16HA-125 Can access read write and run
code
PMIC PH8800-p3-u13 I2C0 TPS65218 Null
SDCard PH1800-P5-J3 MMC0 Null Can access read write and boot
MicroSD_(TF) PH1800-P5-J2 MMC0 Null Can access read write and boot
External-RTC PH8800-p8-u13 I2C1 DS3231SN can read write and keep time off
power
Integrated-RT
C
PH8800-u11 RTC Null can read write and keep time off
power
LEDs PH8800-p10-D3/D
4
gpio Null System can control LED to light or
not
Buzzer PH1800-P14-PZ1 gpio Null System can control buzzer to beep
or not
ADC PH8800-P11-J1 ADC Null Can read the ad value from pin
Power-Button PH1800-P14-S2 I2C0 TPS65218 Can get key value
ADC-Keys PH1800-P14-S4/S5 ADC Null Can get key value
LCD PH1800-P8-J9 RGB Null Can show picture on the screen
Backlight PH1800-P8-J9 PWM Null System can control the LCD
backlight
TouchScreen PH1800-P8-J9 ADC-TSC Null System use touchscreen
VGA PH1800-P9-U14 I2C1 CH7033 Can show picture on the screen
HDMI PH1800-P9-U14 I2C1 CH7033 Can show picture on the screen
eMMC PH8800-p8-u14 MMC1 MTFC4GACAAAM-4M
IT
Can access read write

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EEPROM PH8800-p8-u6 I2C0 CAT24C256W Can access read write
SPI-FLASH EC8800-p8-u3 QSPI N25Q256A13EF840 1. Boot from SPI-Flash
SPI PH1800-P14-J22 SPI1 Null System can send and receive data
in loopback mode
CAN-1 PH1800-P14-J22 CAN1 Null System can send and receive data
between two board
CAN-2 PH1800-P7-u9/u10 CAN0 TJA1040T System can send and receive data
between two board
UART-0 PH1800-P6-U4 UART0 MAX3232CUE+ System can send and receive data
in loopback mode
UART-1 PH1800-P14-J21 UART5 Null System can send and receive data
in loopback mode
UART-2 PH1800-P14-J21 UART3 Null System can send and receive data
in loopback mode
UART-4 PH1800-P6-U4 UART1 MAX3232CUE+ System can send and receive data
in loopback mode
RS485-1 PH1800-P7-U12 UART3 ADM2483 System can send and receive data
between two board
RS485-2 PH1800-P6-U5 spi2 SC16IS762IPW System can send and receive data
between two board
RS485-3 PH1800-P6-U5 spi2 SC16IS762IPW System can send and receive data
between two board
USB-Host PH1800-P10-U17 USB1 USB2514 Can recognize U disk by USB host
USB-OTG PH1800-P10-J13 USB0 Null Can recognize U disk in host
mode, and can work as usb
ethernet in device mode
Audio PH1800-P12-U19 I2C1&Mcasp0 WM8904 can play and record wav
Ethernet-1 PH8800-P9-U9 RGMII1 KSZ9031RNXIA Can ping the server
Ethernet-2 PH1800-P11-U18 RGMII2 AR8035 Can ping the server
WIFI &
Bluetooth
PH1800-P13-J24/J
25
UART1&MMC2
&MCAPS0&I2C1
EXP-WFB00(Jorjin
WG7801-D0)
Can ping the server using 2.4Ghz
Can search bluetooth device
3. Known Issues
Known issue List Detail
SPI-FLASH Not Support: SPI-Flash access in kernel
CAMERA Not Support: Could preview, take picture and record video
Ethernet-1 & Ethernet -2 Bug: Board to board connect could not working normally
LCD Bug:4.3 inch Screen turn white for a while in boot

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Chapter 1 Quick Start
1.1 Burn the System Images to the SD Card
 Firstly, you should prepare a SD card, which is no less than 2GB.
 Then, download and install “Win32 Disk Imager” from https://sourceforge.net/projects/win32diskimager/.
 Select system image: EVK-PH8800-Release-REV01\image\EVK-PH8800-Release-SDcard-EMMC-REV01.img
 Click “Write” button to burn the images:

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1.2 System Boot from SD Card
 Install the Serial Communication software (e.g. SecureCRT), select the corresponding port number, baudrate
as 115200, data bits as 8, stop bits as 1, parity as none.
 Connect the DEBUG interface (J4) to the serial interface of PC with a DB9 crossed serial cable.
 Insert the SD card into the card slot (J3 or J2).
 Press S3 button, then powered the board with a 12V, 2A power. Release S3 after the power reset.
 Wait for the system boot up, then the serial output will show the following information:
Enter username and password as “root” to login;

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1.3 System Boot from SPI Flash
Refer to 1.2, boot the system from SD Card, press “Enter” when the serial terminal prints the following info:
U-Boot SPL 2015.07 (Jun 20 2016 - 16:13:34)
SPL: Please implement spl_start_uboot() for your board
SPL: Direct Linux boot not active!
reading u-boot.img
reading u-boot.img
U-Boot 2015.07 (Jun 20 2016 - 16:13:34 +0800)
I2C: ready
DRAM: 1 GiB
PMIC: TPS65218
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
reading uboot.env
** Unable to read "uboot.env" from mmc0:1 **
Using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
cpsw, usb_ether
Hit any key to stop autoboot: 1
U-Boot#
(Press Enter now.)
Execute the following instructions on the serial terminal:
U-Boot# run update_qspi_flash
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device
reading u-boot-spl.bin
56904 bytes read in 8 ms (6.8 MiB/s)
SF: Detected N25Q256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB, mapped at 30000000
SF: 589824 bytes @ 0x0 Erased: OK
device 0 offset 0x0, size 0xde48

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SF: 56904 bytes @ 0x0 Written: OK
reading u-boot.bin
288540 bytes read in 19 ms (14.5 MiB/s)
device 0 offset 0x20000, size 0x4671c
SF: 288540 bytes @ 0x20000 Written: OK
Enter following instruction to boot from SD Card first:
U-Boot# boot
Copy the EVK-PH8800-Release-SDcard-EMMC-REV01.img to a U-disk, then plug the U-disk to J15;
Execute the following instructions on the serial terminal:
root@embest:~# ls /dev/sd*
/dev/sda /dev/sda1
root@embest:~# mount /dev/sda /mnt/
root@embest:~# dd if=/mnt/EVK-PH8800-Release-SDcard-EMMC-REV01.img of=/dev/mmcblk1
Note: Burn the EMMC takes a long time, please wait patiently.
Then power reset the board to boot from EMMC (Don’t press S3 anymore).

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Chapter 2 Function test
First of all, please refer to Chapter 1.1 and boot up the system. Then test the functions according to the following
guidance.
2.1 LED
User can control LED (D3, D4) indicators on SOM-PH8800 Board. After the system boot up, please execute the
following instructions in serial terminal to implement the test; (D3 is attached to user_leds_d3, D4 to
user_leds_d4)
Light out LED:
root@embest:~# echo 0 > /sys/class/leds/user_leds_d3/brightness
root@embest:~# echo 0 > /sys/class/leds/user_leds_d4/brightness
Light up LED:
root@embest:~# echo 1 > /sys/class/leds/user_leds_d3/brightness
root@embest:~# echo 1 > /sys/class/leds/user_leds_d4/brightness
2.2 Button
2.2.1 KEY_MENU, KEY_BACK
Execute the following instructions on the serial terminal:
root@embest:~# evtest /dev/input/event0
Input driver version is 1.0.1
Input device ID: bus 0x10 vendor 0x1 product 0x1 version 0x100
Input device name: "adc_keypad"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 139 (KEY_MENU)
Event code 158 (KEY_BACK)
Key repeat handling:
Repeat type 20 (EV_REP)
Repeat code 0 (REP_DELAY)
Value -1
Repeat code 1 (REP_PERIOD)
Value -1

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Properties:
Testing ... (interrupt to exit)
Press the buttons:
Event: time 946685117.143847, type 1 (EV_KEY), code 158 (KEY_BACK), value 1
Event: time 946685117.143847, -------------- EV_SYN ------------
[ 320.052799] input input0: key 158 up
Event: time 946685117.227621, type 1 (EV_KEY), code 158 (KEY_BACK), value 0
Event: time 946685117.227621, -------------- EV_SYN ------------
Event: time 946685119.813824, type 1 (EV_KEY), code 139 (KEY_MENU), value 1
Event: time 946685119.813824, -------------- EV_SYN ------------
[ 322.772800] input input0: key 139 up
Event: time 946685119.947630, type 1 (EV_KEY), code 139 (KEY_MENU), value 0
Event: time 946685119.947630, -------------- EV_SYN ------------
Note: Press “CTRL+C” to exit the test.
2.2.2 PWRON_RESETn
Press PWR-RST button for more than 8s will reset the system;
Press PWR-RST button for less than 8s will work as normal button, like KEY_MENU and KEY_BACK.
Execute the following instructions on the serial terminal:
root@embest:~# evtest /dev/input/event2
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
Input device name: "tps65218_pwrbutton"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 116 (KEY_POWER)
Properties:
Testing ... (interrupt to exit)
Press the button:
Event: time 946685191.953554, type 1 (EV_KEY), code 116 (KEY_POWER), value 1
Event: time 946685191.953554, -------------- EV_SYN ------------
Event: time 946685192.114087, type 1 (EV_KEY), code 116 (KEY_POWER), value 0
Event: time 946685192.114087, -------------- EV_SYN ------------

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2.3 RTC
Execute the following instructions on the serial terminal:
Check the current system time:
root@embest:~# date
Sat Jan 1 00:02:07 UTC 2000
Set current time as 10:46, March 9, 2016
root@embest: # date 030910462016
Wed Mar 9 10:46:00 UTC 2016
Write system clock into RTC:
root@embest: # hwclock –w
Read RTC value:
root@embest: # hwclock
Wed 09 Mar 2016 10:46:23 AM UTC -0.432561 seconds
The above information indicates that the hardware clock-RTC-has been set to March 9, 2016, so the system clock
is saved in the hardware clock.
Reboot the system and check the current system time:
root@embest:~# date
Wed Mar 9 10:46:45 UTC 2016
2.4 EEPROM
Execute the following instructions on the serial terminal:
root@embest:~# ./eeprom_test
data will write to EEPROM at 0x400
00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70 71 72 73 74 75 76 77 78 79 7a 7b 7c 7d 7e 7f
80 81 82 83 84 85 86 87 88 89 8a 8b 8c 8d 8e 8f
90 91 92 93 94 95 96 97 98 99 9a 9b 9c 9d 9e 9f
a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 aa ab ac ad ae af
b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf
c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf

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d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 da db dc dd de df
e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 ea eb ec ed ee ef
f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 fa fb fc fd fe ff
data read from EEPROM at 0x400
00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f
40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70 71 72 73 74 75 76 77 78 79 7a 7b 7c 7d 7e 7f
80 81 82 83 84 85 86 87 88 89 8a 8b 8c 8d 8e 8f
90 91 92 93 94 95 96 97 98 99 9a 9b 9c 9d 9e 9f
a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 aa ab ac ad ae af
b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf
c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf
d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 da db dc dd de df
e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 ea eb ec ed ee ef
f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 fa fb fc fd fe ff
If write and read data are the same, the test passes.
2.5 EMMC
Execute the following instructions on the serial terminal:
root@embest:~# touch emmc_read emmc_write
Modify emmc_write value:
root@embest:~# vi emmc_write
E.g. Write “emmc write test” into the system
Write emmc instructions:
root@embest:~# dd if=emmc_write of=/dev/mmcblk1
[ 929.393325] mmcblk1: p1 p2
0+1 records in
0+1 records out
17 bytes (17 B) copied, 0.135215 s, 0.1 kB/s
Read emmc instructions:
root@embest:~# dd if=/dev/mmcblk1 of=emmc_read bs=1K count=10

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10+0 records in
10+0 records out
10240 bytes (10 kB) copied, 0.00446492 s, 2.3 MB/s
Check emmc_read value:
root@embest:~# cat emmc_read
emmc write test
Test passes;
2.6 ADC
Execute the following instructions on the serial terminal to get the sampling values returned:
root@embest:~# cat /sys/bus/platform/devices/TI-am335x-adc/iio\:device0/in_voltage4_raw
391
root@embest::~# cat /sys/bus/platform/devices/TI-am335x-adc/iio\:device0/in_voltage5_raw
529
root@embest:~# cat /sys/bus/platform/devices/TI-am335x-adc/iio\:device0/in_voltage6_raw
3989
root@embest:~# cat /sys/bus/platform/devices/TI-am335x-adc/iio\:device0/in_voltage7_raw
3996
2.7 Buzzer
Open the buzzer:
root@embest:~# echo 1 > /sys/class/misc/buzzer_ctl/state
Shut off the buzzer:
root@embest:~# echo 0 > /sys/class/misc/buzzer_ctl/state
2.8 Audio
The board has input/output interfaces which support audio recording and playing. Users can test the audio
function with the following instructions:
Audio recording test will generate audio file K:
root@embest:~# arecord -t wav -c 1 -r 44100 -f S16_LE -v k
Audio playing test will play the audio file K:
root@embest:~# aplay -t wav -c 2 -r 44100 -f S16_LE -v k

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2.9 HDMI/VGA
Open the uEnv.txt file from SD card, modify fdtfile=embest-SOM_PH8800-BB_EPH1800-HDMI-VGA.dtb
Connect HDMI/VGA cable, then reboot the system
2.10 LCD
4.3” LCD:
Open the uEnv.txt file from SD card, modify fdtfile= embest-SOM_PH8800-BB_EPH1800-4.3inch_LCD.dtb
Connect the screen module to J9, then reboot the system.
7” LCD:
Open the uEnv.txt file from SD card, modify fdtfile= embest-SOM_PH8800-BB_EPH1800-7inch_LCD.dtb
Connect the screen module to J9, then reboot the system.
2.11 Backlight
The backlight brightness has a range from 1 to 8, in which 8 means highest brightness, 1 means lowest.
Execute the following instructions on the serial terminal to implement the backlight test:
The darkest:
root@embest:~# echo 1 > /sys/class/backlight/backlight/brightness
The brightest:
root@embest:~# echo 8 > /sys/class/backlight/backlight/brightness
2.12 Touchscreen
Connect the screen module to J9, execute the following instructions on the serial terminal to implement the touch
screen calibration program:
root@embest:~# ts_calibrate
Following the notes on LCD, click the “+” icon for five times to complete the calibration.
2.13 Serial
The board has 4 serial interfaces, while the UART0 (J4) is the debug interface, UART2 is used as RS485. Execute the
following instructions on the serial terminal to test UART 1and UART4:
2.13.1 UART1
Short Pin 3 and 5 in J21:
root@embest:~# ./uart_test -d /dev/ttyS5 -b 115200

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/dev/ttyS5 SEND: 1234567890
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 1
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 2
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 3
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 4
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 5
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 6
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 7
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 8
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 9
/dev/ttyS5 RECV 1 total
/dev/ttyS5 RECV: 0
Note: Press “CTRL+C” to exit the serial test.
2.13.2 UART4
Short Pin 2 and 3 in J5:
root@embest:~# ./uart_test -d /dev/ttyS1 -b 9600
/dev/ttyS1 SEND: 1234567890
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 1
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 2
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 3
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 4
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 5
/dev/ttyS1 RECV 1 total

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/dev/ttyS1 RECV: 6
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 7
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 8
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 9
/dev/ttyS1 RECV 1 total
/dev/ttyS1 RECV: 0
Note: Press “CTRL+C” to exit the serial test.
2.14 RS485
2.14.1 RS485-2 and RS485-3
Short connect Pin 5 and 8, Pin 4 and 7 in J6:
Execute the following instructions on the serial terminal (in the background):
root@embest:~# ./uart_test -d /dev/ttySC1 -b 9600 -s "a" &
Then enter the following:
root@embest:~# ./uart_test -d /dev/ttySC0 -b 9600 -s "c"
/dev/ttySC0 SEND: c
/dev/ttySC1 RECV 1 total
/dev/ttySC1 RECV: c
/dev/ttySC1 SEND: a
/dev/ttySC0 RECV 1 total
/dev/ttySC0 RECV: a
TtySC0, ttySC1 will send data separately, receive data correctly;
2.14.2 RS485-1 and RS485-2
Short connect Pin 4 in J7 with Pin 7 in J6, Pin 5 in J7 with Pin 8 in J6
Execute the following instructions on the serial terminal (in the background):
root@embest:~# ./uart_test -d /dev/ttySC0 -b 9600 -s "a" &
Then enter the following:
root@embest:~# ./uart_test -d /dev/ttyS3 -b 9600 -s "c"
/dev/ttyS3 SEND: c
/dev/ttySC0 RECV 1 total
/dev/ttySC0 RECV: c
/dev/ttySC0 SEND: a
/dev/ttyS3 RECV 1 total

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/dev/ttyS3 RECV: a
TtySC0, ttyS3 will send data separately, receive data correctly;
2.15 CAN
Test method as below:
Connect Pin 7 and 8 in J7, then execute the following instructions on the serial terminal:
root@embest:~# ip link set can0 type can bitrate 50000 loopback on
root@embest:~# ip link set can0 up
[ 1050.007965] c_can_platform 481cc000.can can0: setting BTR=1c1d BRPE=0000
Execute the following instructions to receive data packet in the background:
root@embest:~# candump can0 &
Execute the following instructions to send data packet:
root@embest:~# cansend can0 123#11223344556677
root@embest:~# can0 123 [7] 11 22 33 44 55 66 77
can0 123 [7] 11 22 33 44 55 66 77
Shut off the device:
root@embest:~# ip link set can0 down
read: Network is down
[ 1130.014498] c_can_platform 481cc000.can can0: setting BTR=1c1d BRPE=0000
[1]+ Exit 1 candump can0
2.16 Network
Execute the following instructions on the serial terminal:
Configure the IP address:
root@embest:~# ifconfig eth0 192.168.2.64
Testing network interface:
root@embest:~# ping 192.168.2.1
2.17 USB
2.17.1 USB Host
Insert the U disk to the USB Host interface (J15), serial terminal will display the disk information:
[ 937.902749] usb 1-1.2: new high-speed USB device number 4 using xhci-hcd
[ 938.023750] usb 1-1.2: New USB device found, idVendor=058f, idProduct=6366
[ 938.030999] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3

EVK-PH8800 User Manual
Embest Technology Co. Ltd | http://www.embest-tech.com 20
[ 938.039779] usb 1-1.2: Product: Flash Card Reader/Writer
[ 938.046076] usb 1-1.2: Manufacturer: Generic
[ 938.050558] usb 1-1.2: SerialNumber: 058F63666438
[ 938.059201] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[ 938.069433] scsi host3: usb-storage 1-1.2:1.0
[ 939.073423] scsi 3:0:0:0: Direct-Access Multiple Card Reader 1.00 PQ: 0 ANSI: 0
[ 939.551759] sd 3:0:0:0: [sda] 15515648 512-byte logical blocks: (7.94 GB/7.39 GiB)
[ 939.560184] sd 3:0:0:0: [sda] Write Protect is off
[ 939.568026] sd 3:0:0:0: [sda] No Caching mode page found
[ 939.575739] sd 3:0:0:0: [sda] Assuming drive cache: write through
[ 939.589938] sda: sda1
[ 939.600578] sd 3:0:0:0: [sda] Attached SCSI removable disk
Execute the following instructions on the serial terminal:
root@embest:~# ls /dev/sd*
/dev/sda /dev/sda1
Storage nodes locate under /dev;
2.17.2 USB OTG
1. Master Device
Connect U disk to J13 with an OTG cable:
[ 880.127626] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
[ 880.134829] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 3
[ 880.148726] xhci-hcd xhci-hcd.0.auto: hcc params 0x0238f06d hci version 0x100 quirks 0x00010010
[ 880.159328] xhci-hcd xhci-hcd.0.auto: irq 194, io mem 0x48390000
[ 880.167206] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
[ 880.175323] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 880.183769] usb usb3: Product: xHCI Host Controller
[ 880.188905] usb usb3: Manufacturer: Linux 4.1.6+ xhci-hcd
[ 880.195618] usb usb3: SerialNumber: xhci-hcd.0.auto
[ 880.207218] hub 3-0:1.0: USB hub found
[ 880.218080] hub 3-0:1.0: 1 port detected
[ 880.222687] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
[ 880.233442] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 4
[ 880.241707] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM.
[ 880.252038] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003
[ 880.260133] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 880.268622] usb usb4: Product: xHCI Host Controller
[ 880.274473] usb usb4: Manufacturer: Linux 4.1.6+ xhci-hcd