value is-1, 0, it indicates timeout, and 1 indicates successful interruption. Before calling this function, we need to initialize gpio.
For example, we want to set gpio 0 to wait for the disconnection of the descent edge:
We need to run gpio edge 0 falling on the terminal before running the program.
2. Int wiringpiisr (INT pin, int edgetype, void (* function) (void ));
This function uses a function as a parameter to obtain the interrupt at a
For most people, the closure of Google's readers is a pain in the Bu Cook, but for Jacob Cook, a college student, it is an opportunity for ambition. He has developed an operating system called "Arkos", claiming to replace all services offered by Google or other cloud companies, including basic services such as running e-mail, chatting, file sharing, virtual hosting, and so on, through a private server with a credit card size.Arkos is a Linux-based server operating system that runs on a small,
Install Qt in Raspberry Pi
Blog link:Http://blog.csdn.net/jdh99, Author: jdh, reprinted please note.
Environment:
HOST: win7
Hardware: Raspberry Pi
Steps:
Reference: http://qt-project.org/wiki/apt-get_Qt4_on_the_Raspberry_Pi
firstly I got the development tools needed by QT creator
This is a creation in
Article, where the information may have evolved or changed.
Overview
Self-build Git service solution There are many, yesterday I built a gitlab on the server, yes Gitlab is very powerful, the function is very complete, but installed in the Raspberry Pi card, installed on my VPS also very card, so I think of Gitea, although the function is not particularly powerful, but very complete,
-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 core_samplesConnect the xtion and
Today to change the play, do not continue to explore Raspbian system, research on the official website recommended another method of installation noobs.So what is noobs? It is an operating system management tool designed for easy-to-use graphical interfaces built for Raspberry Pi. All called: New out of theBox softwareOfficial as follows:The original purpose of this tool is to simplify the
dwc_otg.lpm_enable=0 console=tty1 ROOT=/DEV/MMCBLK0P2 ROOTFSTYPE=EXT4 Elevator=deadline rootwait2. Modify /etc/inittab Enter the following instruction: sudo nano/etc/inittab comment out the last line: #t0:23:respawn:/sbin/getty-l ttyAMA0 115200 vt100OK, restart the next Raspberry Pi now can write their own program to test the serial port. I am the TXD and rxd short, realize spontaneous self-collection.T
code:
def frere play 60 sleep 0.5 play 62 sleep 0.5 play 64 sleep 0.5 play 60 sleep 0.5end
You can enter frere to call this method later. For example, call in a loop:
4.times do frereend6. SYNTHS (synthesizer)
The synthesizer enables the play method to make different sound effects. The default synthesizer is "pretty_bell", but you can change it by yourself:
"pretty_bell""dull_bell""beep""saw_beep""fm"
Try different synthesizer:
with_synth "fm"2.times do play 60 sleep 0.5 play 62 sl
positive +, the shorter pin is the negative-)deploying applicationsFor Raspberry Pi2, you should select arm from the Architecture drop-down menu.The above steps are done later. You can press F5, the program will run automatically, then you can see the flashing LEDs and the following analog interface.The active time of the LED blink can be adjusted by changing the position of the slider.Code explanationHere
Recently, the company came to a Raspberry Pi board, is a drawback, although only the size of the slap, but perfectly formed! The optical USB port has 4, also has the HDMI port, the network port and the microUSB port, the power supply only needs a 5V charger, namely the general Android Charger can give him power. But it's such a small board that can run win10!Yes,
Google has finally released its Fuchsia/magenta kernel of the Raspberry Pi version, the following describes how to compile and run
Ready to work, first need to have an HDMI screen, I'm here is the 800x480 HDMI screen, then the keyboard
Download Magenta code from Google src or github
Https://fuchsia.googlesource.com/magenta
In the running directory
Scripts/downloa
Tag: Exec mil user mode script power option run use ConfigUse cron to boot upbooting with/ETC/INIT.DThere are a lot of scripts under the/etc/init.d folder under the Raspberry Pi, such as cron we've learned about. This cron script wraps the cron daemon into a service that defines its behavior at startup, restart, and termination. This way, users do not need to mak
Ubuntu Raspberry Pi 2b cross compiling environment, ubuntu2b
Generate executable code on another platform. Why is cross-compilation costly? One sentence: The last thing is. Sometimes it is because the target platform does not allow or cannot install the required compiler, and some features of the compiler are required. Sometimes it is because the resources on the target platform are poor, it is impossible t
Mr. Kim. Wu
No.: mrkimwu
QQ: 1315371422
In the previous article "Raspberry Pi's Application in ID card verification", I briefly introduced and implemented the function of Raspberry Pi's reading with ID card. However, reading the local machine is far from enough.
The retrieved ID card information is sent to the remote backend server over the network for data query, judgment, and storage.
The following descr
This blog will show you how to install three different text-based Web browsers on Raspberry Pi. The original article can be found here or at the bottom of this article. Most Web browsers run a little hard on the small school, or consume a lot of resources, so an alternative solution is to use a web browser based on command line.
So far, text-based browsers have n
/binsource. BASHRC4. Simple testIn order to test whether the cross tool chain is installed successfully, you can enterArm-linux-gnueabihf-gcc-v not come out a lot of things, that's right. 2. A simple example file named HELLO-WORLD.C, which only tests the success of cross-compilation and simply tests the floating-point function.
#include
int main (void)
{
float pi = 3.14;
printf ("Hello world\n");
printf ("%.2f\n", 2*
Raspberry Pi backup
We strongly recommend that you regularly back up important files. Backup is usually not limited to user files, but also configuration files, databases, installed software, settings, and even system snapshots.
Here we will guide you through some backup technologies to back up your Raspberry Pi system
Installing QT in Raspberry PiThis blog link: http://blog.csdn.net/jdh99, author: jdh, reprint please specify.Environment:Host: WIN7Hardware: Raspberry PiSteps:Reference Link: http://qt-project.org/wiki/apt-get_Qt4_on_the_Raspberry_PiFirstly I got the development tools needed by Qt Creator in the hope it would is less heavy for the Pi to download Separat Ely.
Use a command line-based Web browser in Linux/Raspberry Pi
This article will show you how to install three different text-based Web browsers on Raspberry Pi. Most Web browsers run a little hard on the small school, or consume a lot of resources, so an alternative solution i
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.