developers need to build an art-level graphical user interface. QT is easy to scale and allows for real component programming. Basically, Qt is the same type of thing as the MOTIF,OPENWIN,GTK on the X Window and the Mfc,owl,vcl,atl on the Windows platform.To put it simply, QT can write programs that are easily ported to other platforms, basically recompiling the program.install qt on Raspberry PiInstall using the following commandsudo apt-get install
-lPS1080.soWith this file, pkg-config you can output the compiler, the parameters required by the linker, and the version information of the installed package. Check if it can be found correctly:$ pkg-config --modversion libopenni2If the version number is 2.2.0.0 , no problem.3. TestingNext, test whether the installation was successful. First, install CORE_SAMPLES , add in the Makefile last line:core_samples: $(CORE_SAMPLES)Compile:PLATFORM=Arm make c
inet DHCP
Auto wlan0
Allow-hotplug wlan0
Iface Wlan0 inet DHCP
WPA-Scan-SSID 1
WPA-AP-Scan 1
WPA-Key-Mgmt WPA-PSK
WPA-Proto RSN WPA
WPA-pairwise CCMP TKIP
WPA-Group CCMP TKIP
WPA-SSID "My Secret SSID"
WPA-PSK "My SSID PSK"
Iface default inet DHCP
Step 3.This opens a editor screen of the WiFi configuration file, need to change.The places where you need to make a change is on the last of the lines.
500ms} led.state=0;}//led.close ();//Process.exit (); //Exit ProgramThere is also a component cur.jsvarHTTP = require ("http");//Utility function that downloads a URL and invokes//callback with the data.function Download (URL, callback) {http.Get(URL, function (res) {vardata =""; Res.on ('Data', function (chunk) {data+=Chunk; }); Res.on ("End", function () {callback (data); }); }). On ("Error", function () {Callback (NULL); });} Exports.download= download;Copy
#文中设置均基于最新版的Raspbian系统2016-Version 11
Raspbian in the desktop environment, the system will go into hibernation after a period of time. Tried some methods such as directly with Xset close DPMS, is not successful.
Raspbian uses a lightweight desktop display manager that is LIGHTDM, which allows you to set up Xserver desktop session interaction \ Display, and so on.
1. Open the terminal;
2. Edit/etc/lightdm/lightdm.conf
This is Meelo original play the Raspberry Pi series articleMaterials:
Raspberry Pi (already connected to the power supply and inserted SD card to write the operating system)
1 laptop computers
PuTTY
Step 1: Open the Settings screenThe initial login Raspbian system will automatically open the setti
The first thing we think of about Linux Web servers is:Apache + MySql + Php.
Apache: is the world's first Web server software to use.
Can run on almost all widely used computer platforms, and is the most popular Web server-side software because of its widespread use across platforms and security.
MySQL: is a relational database management system developed by the Swedish MySQL AB company. is the most popular relational database management system, MySQL is one of the best RDBMS (r
Raspberry Pi is a magical machine, the CPU and memory are poor, but small volume of low power consumption, on the above to engage in some of the West is actually very interesting, quite fun. is Pidara, basic service is not streamlined how much, first cat CPU and RAM. [[emailprotected] ~]$ cat/proc/cpuinfo processor:armv6-compatible Processor Rev 7 (v6l) bogomips:46 4.48FEATURES:SWP half thumb fastmult vfp
is the default toolchain; The *.O file is generated by the *.c file with the same name.Then enter make in the console to generate the executable file.Send me a compiled executable file for Raspberry Pi:Scp-r ~/catkin_ws/src/beginner_tutorials/src/hello-world [Email Protected]:/home/ubuntu"SSH login Execution" after landing into the directory where the executable file, modify the execution permissions of the file.sudo chmod 755 hello-world./hello-worl
Javame embedded 3.3 released, supporting Raspberry Pi
Author: chszs, reprinted with note. Blog homepage: http://blog.csdn.net/chszs
Oracle recently released two javame versions:
First, javame embedded 3.3 for Raspberry Pi (Ea version );The second is javame SDK 3.3 (EA ).
Developers can now develop rich javame app
problem occurs:
When using OpenCV on the raspberry pie, the following error occurred:
Window System doesn ' t support OpenGL
After positioning, found that the error occurred in Cvshowimage, after analysis, the reason is that the raspberry system is installed in the easy version of OpenGL, so do not support cvshowimage, the solution is as follows solutions.
Turn from: Http://raspberrypi.stackexchange.com
;;EsacExit0The /etc/init.d/myscript is not yet randomly activated. Linux on boot, the real check is the/ETC/RCN.D folder, execute the script therein. The n here represents the RunLevel. For example, at run Level 2 o'clock, Linux checks the/ETC/RC2.D folder and executes its scripts. UNIX systems can work in different operating modes, such as single-user mode, multiuser mode, and each mode is called a runlevel. Most UNIX systems follow:Operating level: 0 shutdown, shut down 1 single user,
0
The
The
The
Not normal
See below for explanations
0 0
Normal
Full-Duplex/100 Mbps
0 0
The
Normal
Full-duplex/10 Mbps
0 0
The
Normal
Half-duplex/100 Mbps
0 0
The
The
Normal
Half-duplex/10 Mbps
0 0: Flashing: solid: not bright 0: regular flashing0:act Light
Linux dual-Nic intranet/Internet settings (Raspberry Pi) Raspberry Pi dual-Nic internet/intranet settings, there are the following methods. 1) use a wired network to connect a PC to a gateway. 2) the other is wired to the intranet and wireless to the Internet. Www.2cto.com, even if there are multiple NICs in the config
Pi uses the BCM2836 of the ARMV7 architecture to download the cross compiler ARM-LINUX-GNUEABIHF-GCC.Local Environment: UBUNTU14 + x86_641. Download the compiler address:1). Linaro Open Source organization has the relevant cross-tool chain download, click to enter the page to choose to download, address: https://launchpad.net/linaro-toolchain-binaries/+download 2). The above web site speed is slow, always
The raspberry pi system installs Linux and raspberrypi on the SD card.
I just got a raspberry pi borrowed by Simon and prepared a 4 GB SD card for Linux.
On Windows 7, use the tool Win32DiskImager to write img to the SD card. An error is returned and an error is returned.
Fortunately, I have a Linux vmwarevm. Run the
the following two lines of code:http. Handle ("/", HTTP. Fileserver (http. Dir ("HTML")))http. Listenandserve ("0.0.0.0:8080", nil)Step 4: The target environment is modified to CROSS-ARM6, according to "Ctrl+b" compiled, the generated execution file is the source directory "Test", no suffixStep 5: Copy "Test" to your arm Development Board (Raspberry Pi Raspberrypi, Orange pie Orangepi), and authorize: sudo
") while1: Time.sleep (120) Get_webservertime ("www.baidu.com")3. Giving permissionsudo chmod 777 date.py4. Test procedureChange the system time to an expiration time first' 2016-02-03 10:00:00 'To see if the system time has been modified successfullysudo dateExecute a well-written Python program and use the date command after 20 seconds to see if the system time is synchronized successfully!sudo python date.py5. Add Python program to bootEdit the sys
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.