VIA Technologies VAB-600 SmartETK SDK User manual

100-05202016-113800
QUICK START GUIDE
VAB-600
Linux BSP v1.2.1

Copyright
Copyright © 2016 VIA Technologies Incorporated. All rights reserved.
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and without obligation to notify any person of such change.
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VAB-600 Linux BSP v1.2.1 Quick Start Guide
iii
Revision History
Version
Date
Remarks
1.00
5/19/2016
Initial release

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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Table of Contents
1. Introduction.................................................................................................................................. 1
1.1. Package Contents............................................................................................................................ 1
1.1.1. BSP Folder Contents.................................................................................................................................. 1
1.1.2. Document Folder Contents ..................................................................................................................... 1
1.1.3. EVK Folder Contents ................................................................................................................................. 1
1.2. Version Information and Supported Features .......................................................................... 2
2. Image Development ................................................................................................................... 3
2.1. Booting from the eMMC ............................................................................................................... 3
2.2. Booting from a Micro SD Card .................................................................................................... 3
3. Graphical Environment Installation.......................................................................................... 5
3.1. Installing the Window Manager .................................................................................................. 5
3.2. Installing the Graphics Driver Package ...................................................................................... 5
3.3. Installing the Multimedia Package .............................................................................................. 5
4. Build Environment Setup ........................................................................................................... 6
4.1. Setting Up the Cross-Compiling Environment......................................................................... 6
5. Image Build................................................................................................................................... 7
5.1. Building the U-Boot Binary ........................................................................................................... 7
5.2. Building the Linux Kernel.............................................................................................................. 7
5.3. Building the EMIO-1533 USB Wi-Fi Module Driver................................................................ 8
6. Hardware Functions .................................................................................................................... 9
6.1. Configuring U-Boot Display Parameters.................................................................................... 9
6.1.1. HDMI (default setting).............................................................................................................................. 9
6.1.2. LVDS (AcmepointTP070C01) ................................................................................................................10
6.1.3. Dual Channel LVDS (AUO G220SVN01.0)........................................................................................11
6.2. Configuring the EMIO-2550 miniPCIe Mobile Broadband Module................................... 12
6.2.1. Connecting to the Internet.....................................................................................................................12
6.2.2. Enabling GPS.............................................................................................................................................13
6.3. Setting the Watchdog Timer...................................................................................................... 14
6.4. Programming the GPIO ............................................................................................................... 14
6.5. Configuring RTC Wake-Up ......................................................................................................... 16
7. SPI ROM Backup and Recovery............................................................................................... 17
7.1. Hardware Information.................................................................................................................. 17
7.2. Software Information ................................................................................................................... 18
7.2.1. Backing up the SPI ROM Data ...............................................................................................................18
7.2.2. Reflashing the SPI ROM ..........................................................................................................................18
7.2.3. Resetting the MAC Address...................................................................................................................18

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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1. Introduction
The purpose of this document is to provide an overview of getting started with the VAB-
600 board using Debian Linux.
1.1.Package Contents
There are three folders in the package as listed below.
BSP folder
Description
VAB-600_Linux_source_code.zip
Source Code
Document folder
Description
VAB-600_Linux_BSP_v1.2.1_Quick_Start_Guide_v1.00_20160519.pdf
Quick Start Guide
VAB-600_Linux_EVK_v1.2.1_Image_Installation_Guide_v1.00_20160519.pdf
Image Installation Guide
VAB-600_Linux_EVK_CL_v1.2.1_Image_Installation_Guide_v1.00_20160519.pdf
Command Line Only Image
Installation Guide
EVK folder
Description
arm_201103_gcc4.5.2.tgz
Toolchain
VAB-600_Linux_EVK_v1.2.1.zip
Precompiled Image
VAB-600_Linux_EVK_CL_v1.2.1.zip
Precompiled Command
Line Only Image
VAB600-Debian7.0-Graphics-v1.0.4.tgz
Graphics Driver
VAB600-Debian7.0-Multimedia-v1.0.3.tgz
Multimedia Driver
VAB-600 Linux BSP contents
1.1.1. BSP Folder Contents
VAB-600_Linux_source_code.zip: is a complete Debian BSP including kernel source code,
U-Boot source code, and none built-in driver source code of the EMIO-1533 USB Wi-Fi
module.
1.1.2. Document Folder Contents
VAB-600_Linux_BSP_v1.2.1_Quick_Start_Guide_v1.00_20160519.pdf: The Quick Start Guide is
to provide an overview of getting started with the VAB-600 board using Debian Linux.
VAB-600_Linux_EVK_v1.2.1_Image_Installation_Guide_v1.00_20160519.pdf: The Image
Installation Guide explains how to boot the Linux EVK system image on the VAB-600 board
in order to begin evaluating the platform.
VAB-600_Linux_EVK_CL_v1.2.1_Image_Installation_Guide_v1.00_20160519.pdf: The Image
Installation Guide explains how to boot the Linux EVK command line system image on the
VAB-600 board in order to begin evaluating the platform.
1.1.3. EVK Folder Contents
arm_201103_gcc4.5.2.tgz: is a toolchain, which is a set of software development tools for
building images for the VAB-600 board.
VAB-600_Linux_EVK_v1.2.1.zip: is a precompiled Debian image for evaluating the VAB-600
board.
VAB-600_Linux_EVK_CL_v1.2.1.zip: is a precompiled command line only Debian image for
evaluating the VAB-600 board.
VAB600-Debian7.0-Graphics-v1.0.4.tgz: contains the graphics driver for the Display (Xorg),
2D (EXA), 3D (OpenGL ES), video decoder and Mali memory management.

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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VAB600-Debian7.0-Multimedia-v1.0.3.tgz: contains the multimedia package for the
Gstreamer 0.10.35 environment and ffmpeg plugin.
1.2. Version Information and Supported Features
U-Boot version: 1.1.4
Kernel version: 3.0.8
Evaluation image: Debian Wheezy 7.0
Development based on VIA WM8950_Linux_BSP_1.00.02_121212
Supports eMMC (default) or Micro SD boot
Supports HDMI or LVDS single display (default HDMI output)
Supports HDMI audio output
Supports Acmepoint TFT-LCD resistive touch panel (through 4-wire interface)
Acmepoint 7” TP070C01 (800×480)
Supports AUO LVDS resistive touch panel (through USB interface)
AUO 22” G220SVN01.0 (1680×1050)
Supports COM1 debug port
Supports CIR
Supports Line-Out and Mic-In
Supports USB: keyboard, mouse, flash disk, hard disk, UVC camera
Supports10M/100M Ethernet
Supports EMIO-1533 USB Wi-Fi module
Supports EMIO-2550 miniPCIe Mobile Broadband module
Supports Watchdog, GPIO, and RTC wake-up

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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2. Image Development
This section explains the setup requirements for booting from the eMMC (default) or a
Micro SD card.
2.1.Booting from the eMMC
The first step is to insert a Micro SD card into the host machine and create a FAT formatted
partition. Next, extract the VAB-600_Linux_EVK_v1.2.1.zip or
VAB-600_Linux_EVK_CL_v1.2.1.zip (command line only) and copy the bspinst folder and
scriptcmd file onto the Micro SD card.
Insert the prepared Micro SD card into the VAB-600, connect an HDMI display, and power
on the device to initiate the update process.
Update process screen
When the update process is completed, remove the Micro SD card. The system will
automatically shut down in 3 seconds.
Power on the VAB-600 again, and wait for the login prompt to appear.
The default user name is debian and the password is temppwd .
2.2. Booting from a Micro SD Card
The first step is to insert a Micro SD card (4GB or larger) into your host machine and make
sure it is not mounted. Delete all partitions on the Micro SD card then create a FAT
partition with 200MB, and name it kernel. Next, create an EXT3 partition with the remaining
space and name it fs, then mount the kernel and fs partitions.
Extract the contents from the VAB-600_Linux_EVK_CL_v1.2.1.zip (command line only) to
the host machine. Copy the kernel image uzImage.bin into the bspinst folder on the kernel
partition.
Extract the root file system from armel-rootfs-20151203_v0.02.tgz to the fs partition.
$ tar –xzvf armel-rootfs-20151203_v0.02.tgz -C /media/fs
Once the extraction procedure has completed, insert the precompiled Micro SD card into
the VAB-600 board.

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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To begin setting up the U-Boot parameters, connect the host machine and the VAB-600
board through the debug COM1 port. Use a serial port communication program such as
Minicom or GtkTerm to connect to the debug console. There you will be able to see the
U-Boot boot log and adjust settings in the U-Boot console.
Debug COM1 port diagram
+--------------------------------------------------------------+
| A - Serial Device : /dev/ttyS0 |
| B - Lockfile Location : /var/lock |
| C - Callin Program : |
| D - Callout Program : |
| E - Bps/Par/Bits : 115200 8N1 |
| F - Hardware Flow Control : No |
| G - Software Flow Control : No |
+--------------------------------------------------------------+
Serial port setting of host machine
Next, power on the VAB-600 board to initiate the boot process. When prompted, press
any key to stop the boot process and use the following command to set the Micro SD card
as the boot device.
WMT # setenv boot-sd "mmcinit0; fatload mmc 0 ${cfg.load-addr-kernel} uzimage.bin; if iminfo
${cfg.load-addr-kernel}; then run set-rfs-sd; bootm ${cfg.load-addr-kernel}; fi"
WMT # setenv set-rfs-sd "setenv bootargs mem=${memtotal} root=/dev/mmcblk0p2 rw
rootfstype=ext3 noinitrd mbtotal=${mbsize} ${bootargs-common} ${bootargs-extra}"
WMT # setenv boot-method boot-sd
WMT # saveenv
WMT # reset
To boot from the eMMC, restore the U-boot parameters by using the following command:
WMT # setenv boot-method boot-emmc
WMT # saveenv
WMT # reset
When the reboot process is completed, you will be prompted to login.
The default user name is debian and the password is temppwd .

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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3. Graphical Environment Installation
This section guides you through adding a graphical environment to the command line
version of Debian.
3.1.Installing the Window Manager
Plug-in the ethernet cable into the VAB-600 board, and then enter the following command
to get the DHCP IP in order to activate the internet connection.
$ sudo dhclient eth0
Next, update the source list.
$ sudo apt-get update
If apt-get gives a warning message, type the following command to update the debian-
archive-keyring package.
$ sudo apt-get install debian-archive-keyring
When the update has completed, type the following command to install Xorg and LXDE.
$ sudo apt-get install xorg
$ sudo apt-get install lxde
3.2.Installing the Graphics Driver Package
The graphics driver package contains the Display (Xorg), 2D (EXA), 3D (OpenGL ES), video
decoder and Mali memory management drivers.
Extract the graphics driver package from VAB600-Debian7.0-Graphics-v1.0.4.tgz.
$ tar -xzvf VAB600-Debian7.0-Graphics-v1.0.4.tgz
Install the graphics driver with the provided script, and then reboot the system.
$ cd VAB600-Debian7.0-Graphics-v1.0.4
$ sh install.sh
$ sudo reboot
3.3.Installing the Multimedia Package
The multimedia package contains the Gstreamer 0.10.35 environment and ffmpeg plugin.
Enter the following command to install and set locales by selecting “en_US.UTF-8” from
the list of options presented.
$ sudo apt-get update
$ sudo apt-get install locales
$ sudo dpkg-reconfigure locales
Extract the multimedia driver package from VAB600-Debian7.0-Multimedia-v1.0.3.tgz.
$ tar -xzvf VAB600-Debian7.0-Multimedia-v1.0.3.tgz
Install the multimedia package with the provided script, and then reboot the system.
$ cd VAB600-Debian7.0-Multimedia-v1.0.3
$ ./install_quick.sh
$ sudo reboot

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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4. Build Environment Setup
This section guides you through setting up the build environment for development. All
instructions are based on Ubuntu 12.04 x64 or higher versions.
4.1.Setting Up the Cross-Compiling Environment
Make sure that the host machine is connected to the network and run the packages update.
$ sudo apt-get update
Install the required software packages for cross-compilation.
$ sudo apt-get install git-core gnupg flex bison gperf build-essential \
zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs \
x11proto-core-dev libx11-dev lib32readline-gplv2-devlib32z1-dev \
libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown \
libxml2-utils xsltprocsharutils
The tool to create images for use with the U-Boot boot loader,”mkimage”, is provided by
different packages in Ubuntu 12.04 and in newer Ubuntu releases.
On Ubuntu 12.04 install it as below.
$ sudo apt-get install uboot-mkimage
On Ubuntu 14.04 and newer versions install it as below.
$ sudo apt-get install u-boot-tools
Confirm that the GNU C library version is 2.11 or higher.
$ ldd–version
Extract the toolchain to /usr/local/arm/ (If this folder does not exist in the system, please
create it manually).
$ tar -xzvfarm_201103_gcc4.5.2.tgz -C /usr/local/arm/
The cross compiler will then be found in the /usr/local/arm/arm_201103_gcc4.5.2/
directory.
Export the toolchain to system PATH.
$ export PATH=/usr/local/arm/arm_201103_gcc4.5.2/mybin/:$PATH
To achieve the best floating point operations performance, create an alias for the toolchain.
# alias arm_1103_le-as='arm_1103_le-as -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=softfp'
# alias arm_1103_le-c++='arm_1103_le-c++ -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=softfp'
# alias arm_1103_le-cpp='arm_1103_le-cpp -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=softfp'
# alias arm_1103_le-g++='arm_1103_le-g++ -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=softfp'
# alias arm_1103_le-gcc='arm_1103_le-gcc -mcpu=cortex-a9 -mfpu=neon -mfloat-abi=softfp'
# alias arm_1103_le-gcc-4.5.2='arm_1103_le-gcc-4.5.2 -mcpu=cortex-a9 -mfpu=neon -mfloat-
abi=softfp'

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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5. Image Build
5.1.Building the U-Boot Binary
This section describes how to build the U-Boot image from the source code.
Extract the U-Boot source.
$ tar –xzvf uboot.130522_Display_Support_v0.05.tgz
Type the following command in order to use the default configurations.
$ cd uboot.130522_Display_Support_v0.05
$ make wmt_config
Build the U-boot image with the ARM cross compiler.
$ make CROSS_COMPILE=/usr/local/arm/arm_201103_gcc4.5.2/mybin/arm_1103_le-
When the process is completed, the u-boot.bin file will be stored in the
uboot.130522_Display_Support_v0.05 directory. Copy this file to the bspinst folder on the
SD card for U-Boot update.
5.2.Building the Linux Kernel
This section describes how to build the kernel image from the source code.
To begin, extract the kernel source.
$ tar –xzvf VAB-600_Linux_BSP_Kernel_Source_v0.08.tgz
Type the following command to use the default configurations.
$ cd VAB-600_Linux_BSP_Kernel_Source_v0.08/Kernel_3.0.8
$ make VAB-600_Linux_defconfig
Use the kernel’s menuconfig to make modifications to the default settings.
$ make menuconfig
Finally, compile the kernel.
$ make ubin CROSS_COMPILE=arm_1103_le- -jX
“X” above represents the number of parallel jobs to be run by make. A reasonable default
value is the number of CPU cores of your host system. For example, use "-j4" on a quad-
core system.
When the compilation process is completed, the resulting uzImage.bin file will be stored
in the root folder of the kernel source folder. Copy this file to the bspinst folder on the SD
card for kernel update.

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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5.3.Building the EMIO-1533 USB Wi-Fi Module Driver
This section describes how to build the EMIO-1533 USB Wi-Fi module driver from the
source code.
Extract the EMIO-1533 driver source.
$ tar -xzvf vt9271-202_20151209.tgz
Open the vt9271-202/build/scripts/vt9271/Makefile.vt9271 file and edit “KERNELPATH” to
match your own kernel source path. The following example uses /home/work/VAB-
600_Linux_BSP_Kernel_Source_v0.08/Kernel_3.0.8 as the kernel source path.
$ export KERNELPATH=/home/work/VAB-600_Linux_BSP_Kernel_Source_v0.08/Kernel_3.0.8
Type the following command in order to use the default configurations.
$ cd vt9271-202/build
$ make
When the process is completed, the vt9271.ko kernel module will be stored in the vt9271-
202/output/ directory. Copy this file to the /lib/modules folder on the VAB-600 system for
EMIO-1533 USB Wi-Fi module support.

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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6. Hardware Functions
6.1. Configuring U-Boot Display Parameters
6.1.1. HDMI (default setting)
Connection:
Connect your display to the VAB-600 board through the Mini HDMI connector.
U-Boot:
Connect the VAB-600 board and the host machine through the debug COM1 port.
Debug COM1 port diagram
Please note that the system will automatically detect the EDID information and set the
monitor default resolution. Configuring U-Boot only affects the resolution of the U-Boot
logo.
Use the following command to update the U-Boot parameters.
WMT # setenv wmt.display.param 4:6:1:1920:1080:60
WMT # saveenv
WMT # reset
1920:1080 is the resolution of the HDMI monitor used in this example.

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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Xorg:
Edit the /etc/X11/xorg.conf file, commenting out all the rows containing "Modeline" by
adding ”#”at the beginning of those lines.
# Modeline "640x480_75" 30.75 640 664 728 816 480 483 487 504 -hsync +vsync
# Modeline "800x480_75" 38.50 800 832 912 1024 480 483 493 504 -hsync +vsync
# Modeline "800x600_75" 49.00 800 840 920 1040 600 603 607 629 -hsync +vsync
# Modeline "1024x768_75" 82.00 1024 1088 1192 1360 768 771 775 805 -hsync +vsync
# Modeline "1280x720_75" 95.75 1280 1360 1488 1696 720 723 728 755 -hsync +vsync
# Modeline "1280x768_75" 102.25 1280 1360 1488 1696 768 771 781 805 -hsync +vsync
# Modeline "1280x1024_75" 138.75 1280 1368 1504 1728 1024 1027 1034 1072 -hsync +vsync
# Modeline "1360x768_75" 109.00 1360 1448 1584 1808 768 771 781 805 -hsync +vsync
# Modeline "1440x900_75" 136.75 1440 1536 1688 1936 900 903 909 942 -hsync +vsync
# Modeline "1400x1050_75" 156.00 1400 1504 1648 1896 1050 1053 1057 1099 -hsync +vsync
# Modeline "1440x900_75" 136.75 1440 1536 1688 1936 900 903 909 942 -hsync +vsync
# Modeline "1920x1080_75" 220.75 1920 2064 2264 2608 1080 1083 1088 1130 -hsync +vsync
# Modeline "1680x1050" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
# Modeline "640x480" 23.75 640 664 720 800 480 483 487 500 -hsync +vsync
# Modeline "800x480" 29.50 800 824 896 992 480 483 493 500 -hsync +vsync
# Modeline "800x600" 38.25 800 832 912 1024 600 603 607 624 -hsync +vsync
# Modeline "1024x768" 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync
# Modeline "1280x720" 74.50 1280 1344 1472 1664 720 723 728 748 -hsync +vsync
# Modeline "1280x1024" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
# Modeline "1360x768" 84.75 1360 1432 1568 1776 768 771 781 798 -hsync +vsync
# Modeline "1400x1050" 121.75 1400 1488 1632 1864 1050 1053 1057 1089 -hsync +vsync
# Modeline "1440x900" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync
# Modeline "1920x1080" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
# Modeline "800x400" 33.5 800 964 974 1063 480 500 523
In the section “Screen”, make sure to comment out all the rows containing “modes”by
adding “#”at the beginning of those lines.
Section "Screen"
Identifier "Mali Screen"
Device "Mali FBDEV"
Monitor "Mali Monitor"
DefaultDepth 16
SubSection "Display"
Depth 16
# Modes "800x480"
# Modes "1680x1050"
EndSubSection
EndSection
6.1.2. LVDS (AcmepointTP070C01)
Both the U-Boot and Xorg need to be modified in order for the LVDS panel to display
correctly.
Connection:
Connect the LVDS panel to the VAB-600 through the LVDS connector on the VAB-600-D
card.
U-Boot:
Connect the VAB-600 and the host machine through the debug COM1 port. Use the
following command to update the U-Boot parameters.
WMT # setenv wmt.display.param 2:0:24:800:480:60
WMT # saveenv
WMT # reset
800:480 is the resolution of the LVDS panel.
Xorg:
Edit the /etc/X11/xorg.conf file, commenting out all the rows containing "Modeline" by
adding ”#”at the beginning of those lines, except the following “Modeline” below.
Modeline "800x480" 33.5 800 964 974 1063 480 490 500 523

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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In the section “Screen”, delete “#”before “Modes “800x480””.
Section "Screen"
Identifier "Mali Screen"
Device "Mali FBDEV"
Monitor "Mali Monitor"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "800x480"
EndSubSection
EndSection
6.1.3. Dual Channel LVDS (AUO G220SVN01.0)
Both the U-Boot and Xorg need to be modified in order for the LVDS panel to display
correctly.
Connection:
Connect the dual channel LVDS panel to the VAB-600 board through the LVDS connector
on the VAB-600-D card.
U-Boot:
Connect the VAB-600 board and the host machine through the debug COM1 port. Use the
following command to update U-boot parameters.
WMT # setenv wmt.display.param 2:0:24:1680:1050:60
WMT # saveenv
WMT # reset
1680:1050 is the resolution of the LVDS panel.
Xorg:
Edit the /etc/X11/xorg.conf file ,commenting out all the rows containing "Modeline" by
adding ”#”at the beginning of the lines, except the following “Modeline” below.
Modeline "1680x1050" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
In the section “Screen”, delete “#”before “Modes “800x480”and change “800x480”to
“1680x1050”.
Section "Screen"
Identifier "Mali Screen"
Device "Mali FBDEV"
Monitor "Mali Monitor"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1680x1050"
EndSubSection
EndSection

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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6.2. Configuring the EMIO-2550 miniPCIe Mobile Broadband
Module
The EMIO-2550 miniPCIe Mobile Broadband module supports 3G and GPS functions.
The first step to enable these functions is to insert the EMIO-2550 module and an active
SIM card into the VAB-600. Then connect the VAB-600 to the internet through LAN port,
and power it on.
6.2.1. Connecting to the Internet
Type the following command to install the modemmanager package then reboot.
$ sudo apt-get install modemmanager
$ sudo reboot
After the system has rebooted, use the following command to confirm that the system has
correctly detected the EMIO-2550 module.
$ lsusb
Look for “ID 1545:1102 U-Blox AG” in the ensuing list to ensure the module has been
recognized.
To configure the Mobile broadband connection, click on the “Network Manager” icon
located in the notification area.
Network Manger configuration
Fill in the required fields to setup your connection. If you are unsure of what the required
fields and values are, check with your Mobile Broadband provider.
3G connection configuration

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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After the connection is created, click on the “Network Manager” icon again and select the
connection you just created.
The successful connection looks like this:
Successful connection screen
6.2.2. Enabling GPS
Use a serial port communication program such as Minicom or GtkTerm to configure the
GPS function using the serial port setup configuration.
For example, install the Minicom program with the following command, and then open a
Minicom terminal window.
$ sudo apt-get install minicom
$ sudo minicom -s
Select the “Serial port setup” option to configure the serial port, and then set the
following settings provided in the screenshot below.
+--------------------------------------------------------------+
| A - Serial Device : /dev/ttyUSB3 |
| B - Lockfile Location : /var/lock |
| C - Callin Program : |
| D - Callout Program : |
| E - Bps/Par/Bits : 115200 8N1 |
| F - Hardware Flow Control : No |
| G - Software Flow Control : No |
+--------------------------------------------------------------+
Serial port setting of GPS
When the setting is completed, type the following GPS AT commands into Minicom:
AT+UGPRF=1, AT+UGRMC=1, AT+UGGSV=1, AT+UGZDA=1, and AT+UGPS=1,0
Wait for the OK message to appear before sending the next AT command.
AT+UGPRF=1
OK
AT+UGRMC=1
OK
AT+UGGSV=1
OK
AT+UGZDA=1
OK
AT+UGPS=1,0
OK
To ensure the GPS is functioning correctly, open a second Minicom terminal window and
set the serial device to /dev/ttyUSB7. It will then output the data received from the GPS as
illustrated in the screenshot below.
$GPRMC,142015,00,A,2501.93961,N,12133.66111,E,0.068,,030314,,,A*73
$GPGSV,4,1,13,01,34,184,29,03,49,023,47,06,26,042,41,07,44,317,26*75
$GPGSV,4,2,13,08,13,323,,11,60,192,,13,29,242,38,16,33,071,16*79
$GPGSV,4,3,13,19,65,356,44,23,18,208,12,27,35,034,27,30,37,145,29*7B
$GPGSV,4,4,13,32,01,154,*4B
$GPZDA,142015.00,03,03,2014,00,00*62
GPS NMEA message

VAB-600 Linux BSP v1.2.1 Quick Start Guide
14
6.3. Setting the Watchdog Timer
This section describes how to use Watchdog timer function of the VAB-600.
To enable the Watchdog timer, enter the following command:
$ sudo/usr/bin/wdt_app–et
To disable the Watchdog timer, enter the following command:
$ sudo /usr/bin/wdt_app–dt
To set the Watchdog timer, enter the following command:
$ sudo /usr/bin/wdt_app–t<second>
<second>: Input the desired reboot delay time in seconds between 1 to 255.
To read the Watchdog countdown timer, enter the following command:
$ sudo /usr/bin/wdt_app–tg; echo $?
It will show how many seconds are left before the system reboots.
6.4. Programming the GPIO
This section describes how to use the GPIO on the VAB-600. GPIO uses pin 5 to pin 12 of
CN9 pin header. The onboard pin header and pinout are shown below.
CN9 pin header diagram
onboard pin #
Signal
onboard pin #
Signal
1
VCC33
2
VCC_5V
3
GND
4
VSUS33
5
GPI20_CH
6
GPIO24_CH
7
GPIO21
8
GPIO25
9
GPIO_22
10
GPIO_26
11
GPIO_23
12
GPIO_27
13
I2C0SDA
14
I2C0SCL
CN9 pin definitions table

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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Use the devmem2 command to read/write the GPIO registers.
$ sudo devmem2 <address> <type> <data>
<address> : physical address of the register
<type> : data type to be read/written, [b]yte and [h]alfword(2 byte)
<data> : data to be written to the register
The corresponding addresses and BIT of GPIO pins are listed below:
Enable GPIO function: 1 for enable / 0 for disable
Address
BIT
Attribute
Signal
Onboard pin
0xd8110070
4:7
RW
GPIO[20:23]
5,7,9,11
0xd8110071
0:3
RW
GPIO[24:27]
6,8,10,12
Set GPIO mode: 1 for output mode / 0 for input mode
Address
BIT
Attribute
Signal
Onboard pin
0xd81100b0
4:7
RW
GPIO[20:23]
5,7,9,11
0xd81100b1
0:3
RW
GPIO[24:27]
6,8,10,12
GPIO output: 1 for high state / 0 for low state
Address
BIT
Attribute
Signal
Onboard pin
0xd81100f0
4:7
RW
GPIO[20:23]
5,7,9,11
0xd81100f1
0:3
RW
GPIO[24:27]
6,8,10,12
Read GPIO input: 1 for high state / 0 for low state
Address
BIT
Attribute
Signal
Onboard pin
0xd8110030
4:7
RW
GPIO[20:23]
5,7,9,11
0xd8110031
0:3
RW
GPIO[24:27]
6,8,10,12
Enable GPIO Pull-up Pull-down function: 1 for enable / 0 for disable
Address
BIT
Attribute
Signal
Onboard pin
0xd81104b0
4:7
RW
GPIO[20:23]
5,7,9,11
0xd81104b1
0:3
RW
GPIO[24:27]
6,8,10,12
Set GPIO pull up/down: 1 for up / 0 for down
Address
BIT
Attribute
Signal
Onboard pin
0xd81104f0
4:7
RW
GPIO[20:23]
5,7,9,11
0xd81104f1
0:3
RW
GPIO[24:27]
6,8,10,12
GPIO control register address table
The following example is to enable the GPIO 20 ~ GPIO 23 then set them to output mode
and high state.
$ sudo devmem2 0xd8110070 b 0xf0
$ sudo devmem2 0xd81100b0 b 0xf0
$ sudo devmem2 0xd81100f0 b 0xf0
The following example is to enable and read the status of GPIO 24 ~ GPIO 27 then set
them to input mode.
$ sudo devmem2 0xd8110071 b 0x0f
$ sudo devmem2 0xd81100b1 b 0x00
$ sudo devmem2 0xd8110031 b

VAB-600 Linux BSP v1.2.1 Quick Start Guide
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6.5. Configuring RTC Wake-Up
RTC wake-up is enabled by the IDT1337G
1
chip to support auto power-on function. The
IDT1337G chip is controlled by the I2C0 bus of VAB-600.
The first step is to make sure the RTC time is consistent with the system time. To read the
RTC time, use the following command:
$ sudo i2cdump –f –y –r 0-6 0 0x68
The following example value 03410101050516 means Monday, May 5th 2016 01:41:03.
RTC time setting sample
The following example has incorrect time value. The minutes in the RTC time is not
consistent with the system time.
RTC time setting with incorrect value
Use the following command to correct inconsistent values:
$ sudo i2cset –f –y 0 0x68 <address> <Value>
The corresponding addresses and values to make them consistent are listed below:
Address
Value
Description
0x0
0x$(date +”%S”)
Seconds
0x1
0x$(date +”%M”)
Minutes
0x2
0x$(date +”%-k”)
Hours
0x3
0x$(date +”%u”)
day of week
0x4
0x$(date +”%d”)
date of month
0x5
0x$(date +”%m”)
Month
0x6
0x$(date +”%g”)
Year
RTC time setting table
From the example above, the minutes did not match. To correct this, enter the following
command:
$ sudo i2cset –f –y 0 0x68 0x1 0x$(date +”%M”)
For information of setting the RTC function and its activation time, please refer to
“Timekeeper Registers” in the IDT1337G's datasheet.
1
See the IDT 1337G page at http://www.idt.com/products/general-parts/1337g-real-time-clock-i2c-serial-interface