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Yocto

User Manual

GUF-Yocto-34.0-r5756-0

VINCELL

Built on 11.02.2016

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Содержание GUF-Yocto-34.0-r5756-0-VINCELL

Страница 1: ...Yocto User Manual GUF Yocto 34 0 r5756 0 VINCELL Built on 11 02 2016...

Страница 2: ...is liable for any direct indirect special incidental or consequential damages arising out of use or resulting from non compliancy of therein conditions and precautions even if advised of the possibil...

Страница 3: ...Fricke shared configuration 15 4 1 8 Autocopy 16 4 1 9 Autostart 18 4 1 10 Cron 19 4 2 Utilities 20 4 2 1 Garz Fricke system configuration 20 4 2 2 Power down mode 20 4 2 3 Sendmail 21 5 Add On Packag...

Страница 4: ...rmation about Garz Fricke Yocto Linux systems 44 8 2 Download and install the Garz Fricke Yocto BSP 45 8 3 Building the BSP for the target platform with Yocto 45 9 Deploying the Linux system to the ta...

Страница 5: ...LL as well as the build process of the Garz Fricke Linux BSP and the integration of custom software components The BSP can be downloaded from the Garz Fricke support server I http support garz fricke...

Страница 6: ...cific parts of the Linux OS and several internal device and subsystem drivers 2 3 The root file system The root file system is simply a file system It contains the Linux file system hierarchy folders...

Страница 7: ...linux html Information regarding embedded Linux systems can be found in the following book Building Embedded Linux systems 2nd Edition Karim Yaghmour John Masters Gilad Ben Yossef Philippe Gerum O Rei...

Страница 8: ...to RS232 converter using a null modem cable For a working connection the signals TXD and RXD have to be connected cross over in the same way like a null modem cable does The location of the X13 conne...

Страница 9: ...e host system in order to gain access To login via SSH type on the host system ssh root 192 168 1 1 The first time you access the target system from the host system the target is added to the list of...

Страница 10: ...socket_type dgram wait yes user nobody server usr sbin in tftpd server_args srv tftp disable no The srv tftp directory must be created on the host system with the following commands sudo mkdir srv tft...

Страница 11: ...GUF Yocto 34 0 r5756 0 VINCELL User Manual user root and no password 11...

Страница 12: ...3 3 wait etc init d rc 3 l4 4 wait etc init d rc 4 l5 5 wait etc init d rc 5 l6 6 wait etc init d rc 6 As the comments in the file tell the first script to be run on boot is etc init d rcS which execu...

Страница 13: ...p remove update rc d etc init d myapp exists during rc d purge continuing Removing any system startup links for myapp etc rc0 d K20myapp etc rc1 d K20myapp etc rc2 d S20myapp etc rc3 d S20myapp etc rc...

Страница 14: ...dbus bindings can be found at I http dbus freedesktop org doc dbus glib 4 1 3 SSH service The ssh service allows the user to log in on the target system Futhermore the SFTP and SCP functionalities are...

Страница 15: ...onfig files in one specific folder To reduce the security risk of a open remote service it is possible to restrict the ssh service access to the SFTP feature locking the user into for example his home...

Страница 16: ...es are listed in etc modules and loads them using sbin modprobe To ensure that the module loading works correctly the module dependencies in lib modules kernel ver sion modules dep have to be consiste...

Страница 17: ...copy mechanism includes the following components etc udev rules d automount rules UDEV rule that triggers the mount sh script when a storage media is plugged unplugged etc udev scripts mount sh Script...

Страница 18: ...on is still enabled by default if the XML configuration contains no explicit setting for this function To be able to configure each of the autojob functions individually you may have to install an XML...

Страница 19: ...eady stated in I 4 1 8 Autocopy autocopy is executed before autostart The user may desire to autostart an application from a storage media with command line args In this case a start script can be pla...

Страница 20: ...your XML configuration probably doesn t contain explicit settings for the autojob functions yet Please install one of the provided XML configuration files as shown above The possible values of all and...

Страница 21: ...itionally a value is appended this value is written to the according setting in the XML configuration The name set with sconfig is also used as hostname for the device It defaults to GFMM serial numbe...

Страница 22: ...irst few incoming bytes after and including the wakeup byte might be truncated and not received by the UART driver 4 2 3 Sendmail The sendmail tool can be used to send emails from the device The sendm...

Страница 23: ...mium browser as installable RPM package This package is intended to be used for HTML based applications starting automatically during system boot which won t display the regular browser GUI i e URL ba...

Страница 24: ...n temporarily do so by first stopping Chromium as described above and then calling it manually with any URL s and command line options you like e g etc init d chromium stop Chromium http www google co...

Страница 25: ...s the easiest way is to configure one single device as desired and then take a snapshot of the device s root chromium folder which can then be unpacked on any other device desired 5 1 6 Soft Keyboard...

Страница 26: ...he Garz Fricke hardware platforms include a dedicated connector with isolated digital I O pins On these pins the direction cannot be changed since it is determined by the wiring Thus the direction fil...

Страница 27: ...5_half_duplex_mode struct serial_rs485 rs485 int fd Open port fd open dev ttymxc2 O_RDWR O_SYNC Enable RS485 half duplex mode rs485 flags SER_RS485_ENABLED SER_RS485_RTS_ON_SEND ioctl fd TIOCSRS485 rs...

Страница 28: ...ev is described in the Linux kernel documentation and available in the kernel directory under Documentation spi spidev Additionally there is an example C program available in the same location Documen...

Страница 29: ...kBit s from a Linux console root vincell canconfig can0 bitrate 125000 root vincell ifconfig can0 up Note Due to the use of the busybox version of the ip tool the following sequence does NOT work on...

Страница 30: ...vice acts as a USB device itself by emulating a specific device type Additionally if supported an OTG enabled port can automatically detect which of the above roles the platform plays during the plugg...

Страница 31: ...file operations open read write and close Example 1 Reading and adjusting the current backlight brightness on the console root vincell cat sys class backlight pwm backlight 0 brightness 255 root vince...

Страница 32: ...interrupt is generated The interrupt will trigger an event on the temp1_alrt sysfs entry that can be catched using the poll function Read the temperature alert flag active low root vincell cat sys cla...

Страница 33: ...nal with a frequency of 440 Hz default settings with GStreamer s adiotestsrc and alsasink plugins root vincell gst launch audiotestsrc audioconvert alsasink 6 15 SRAM The battery backed SRAM is contro...

Страница 34: ...ote Currently there is a limitation in the X Server display driver so the secondary display can t be used from the X Server out of the box 6 16 3 HDMI as mirror of the internal display The HDMI mirror...

Страница 35: ...ue composite sync polarity low or high gsync value synch on green false or true extsync value external sync enable false or true bcast value broadcast enable false or true laced value interlace enable...

Страница 36: ...04 Desktop amd64 other destributions might work but 32bit systems will not In that case you have to build the sdk yourself using the bsp as described in I 8 3 Building the BSP for the target platform...

Страница 37: ...target system s usr bin directory using one of the ways described in chapter I 3 Accessing the target system and execute it from the device shell It might be necessary to change the access rights of...

Страница 38: ...e cross toolchain shipped with the Garz Fricke BSP the Qt version must be set up properly Furthermore the device configuration for automatic deployment must be set up properly Our tests were performed...

Страница 39: ...dress depends on the configuration factory default is the static adress 192 168 1 1 but dhcp is also possible Make sure that you can access the target as described in I 3 Accessing the target system w...

Страница 40: ...the version the Qt Versions section It should be set to opt guf GUF Yocto 34 0 r5756 0 sdk sysroots x86_64 gufsdk linux usr bin qt5 qmake as seen in I Figure 8 Figure 8 Qt Creator Qt Versions In the...

Страница 41: ...uick Application The application will be the default sample application that comes with the Qt Creator IDE To create a new project select File New File or Project Make sure that in the top right corne...

Страница 42: ...now For further information on how to use Qt Creator and how to program Qt applications see the online Qt documen tation I http qt project org doc qtcreator 3 0 index html I http qt project org doc 7...

Страница 43: ...h etc profile d tslib sh f etc profile d qt5 touch config sh etc profile d qt5 touch config sh export DISPLAY 0 case 1 in start We don t want this script to block the rest of the boot process if 2 bac...

Страница 44: ...mon m p var run qt4 guf webdemo pid b a usr bin qt4 guf webdemo S no scrollbars file usr share website index htm stop start stop daemon p var run qt4 guf webdemo pid K echo Usage etc init d qt4 guf we...

Страница 45: ...ww yoctoproject org documentation current In order to build a Yocto based Linux system the following list of packages should be installed Debian and Ubuntu package names autoconf automake build essent...

Страница 46: ...34 0 r5756 0 tar bz2 If everything went right we have a GUF Yocto 34 0 r5756 0 directory now so we can change into it cd GUF Yocto 34 0 r5756 0 8 3 Building the BSP for the target platform with Yocto...

Страница 47: ...0x00000000 Redundant FIS 0xE0080000 0xE0080000 0x00040000 0x00000000 current FIS directory 0xE00C0000 0xE00C0000 0x00040000 0x00000000 backup logo png 0xE0100000 0x80100000 0x00020000 0x80100000 kerne...

Страница 48: ...may choose 0x1F000000 To create the new root file sysetm partition on the NAND flash use RedBoot fis create b 0x80100000 l 0x1F000000 e 0x80100000 rootfs If the system asks you to increment the length...

Страница 49: ...there are more hints on securing the ssh service in the chapter I 4 1 3 SSH service It is possible to restrict the users allowed using this service lock a sftp access to a subfolder only and create cu...

Страница 50: ...sword changed This creates a new user user name with group user name and the home directory home user name The new user can be used to login immediately See the man page of adduser for more options 10...

Страница 51: ...ser permissions concept should solve this issue The bootmode switch should be secured with restricing physical access by the mechanical construction If this is impossible it is possible to disable the...

Страница 52: ...firewall root vincell iptables F 10 5 2 Using secure network protocols We strongly recommend the usage of secure network protocols E g HTTPS instead of HTTP FTPS instead of FTP or SSH instead of telne...

Страница 53: ...er Manual GF_Flash N Go_Manual version pdf Contains relevant information about the BIOS boot logo display settings etc in the case that Flash N Go Boot is used as the bootloader RedBoot User Manual GF...

Страница 54: ...n and ours we want to make certain that everyone understands that there is no warranty for this free software If the software is modified by someone else and passed on we want its recipients to know t...

Страница 55: ...ased on the Program on a volume of a storage or distribution medium does not bring the other work under the scope of this License 3 You may copy and distribute the Program or a work based on it under...

Страница 56: ...ystem in reliance on consistent application of that system it is up to the author donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose t...

Страница 57: ...al Public License as published by the Free Software Foundation either version 2 of the License or at your option any later version This program is distributed in the hope that it will be useful but WI...

Страница 58: ...incorporating your program into proprietary programs If your pro gram is a subroutine library you may consider it more useful to permit linking proprietary applications with the library If this is wh...

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