adafruit rpi

0 environmentLinux hosts os:ubuntu14.04 64-bit, running on WMware workstation 10 virtual machinesRaspberry Pi Version: Raspberry Pi 2 Type B.Raspberry Pi Os:debian Jessie Raspbian Jessie1 Raspberry Pi Start-up processThe boot process of the Raspberry Pi is roughly the same, and is divided into 3 stages: the GPU bootloader on the ROM starts the GPU,GPU boot cpu,cpu directly to boot the kernel or boot the kernel through u-boot.Since Raspberry Pi is not open source for GPU-related things, porting u

Non-free RPI Raspberry Pi (Raspberry pie) Domestic software sources have these: Deb Http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/wheezy main contrib non-free RPI deb-src http:// Mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/wheezy Main contrib non-free RPI deb http:// Mirrors.neusoft.edu.cn/raspbian/raspbian/wheezy Main contrib non-free

Reference: RPi Serial ConnectionThis article from: Http://www.raspberry-projects.com/pi/programming-in-c/uart-serial-port/using-the-uartUsing the UARTIf you is running Raspbian or similar then the UART would be used as a serial console. Using a suitable cable, such as the Ttl-232r-3v3-we, you can connect it to your PC and using some simple terminal software Set to 115200-8-n-1 use the command line interface to the Raspberry Pi in the same a-line as if

= 3.146; Const double* Const PI =π //double const* const PI =π cout cout Double alpha = 3.14 *pi = Alpha; Error. Because pi points to a constant, *PI cannot be changed. //pi =α//error. Because pointer pi is a constant, it cannot be changed again. The ②const modifier reference Const modifier Reference is not as complex as a pointer-decoration pointer, but only in one form. The reference itself cannot be changed, but the object being pointed to can be changed, see above "first, basic kno

configured by the board support Code, but the intention was to Eventually reach that goal. On Raspberry Pi, Device Tree usage is controlled from/boot/config.txt. By Default, the Raspberry Pi kernel boots with device tree enabled. You can Completely disable DT usage (for today) by adding: Device_tree= To your config.txt, which should cause your Pi to revert Doing things after a reboot. If you want to disable the device tree, simply write the device_tree= in Boot/config

Ismanager:noHere we have a set of interesting but still empty swarm clusters.We also need to understand the new abstract definition of service in Docker 1.12. You may have noticed the Docker Service command in the previous output. A docker service is a piece of software that runs in a container and is responsible for providing the outside world with a "service" running within a swarm cluster.Such a service can consist of a single or multiple sets of containers. In the latter case, we can ensure

installation method. What does it do? It's easy. He downloads a series of packages we put on GitHub to your machine and installs them. There aren't many packages, just right. Simplified steps1. Insert the SD card and install arch Linux on the SD card. 2. start your Raspberry Pi, find its IP address (how to set the [set Raspberry Pi IP address]), and log on to the root account through SSH. The default root password of arch Linux is root, if you have modified the root password, use the modified

BoardThe following command compiles the firmware that generates the Raspbian (posix_pi2_release) version.cd Firmwaremake posix_rpi2_release # for cross-compiler buildThe "Mainapp" executable file is located under directory Build_posix_rpi2_release/src/firmware/posix. Copy it to RPI (replace YOUR_PI with your RPI's IP or hostname, about how to access your RPI, see the introduction)Then use the following com

version, right clone or Download, click Download Zip to download.can also be installed directly online:sudo Install build-essential Gitgit clone git://github.com/raspberrypi/tools.gitCross-compiling tools for other platforms please Google yourself.3. Install the cross-compilation tool3.1 DecompressionDownload the completed file for Tools-master.zip, you can directly right-click Extract decompression, you can also unzip decompression to the new RPI fo

serial port, you can view Neo's IP address from the router. Assuming the IP address is 192.168.100.106, we can telnet to Nanopi neo via SSH. I use the SECURECRT 7.3 login Here, this time we log in with the root account, and the login is shown in Figure 1.12 after success. Figure 1.12 Nanopi neo via ssh login Ubuntu Core 2.6 View System Status We can use the top command to view the operation of the system, press "1" to expand CPU statistics. As shown in Figure 1.13, you can see that the CPU is r

1. Preparatory work: 1.1 Development environment System Ubuntu 16 (64-bit) 1.2 Download Source: Https://github.com/raspberrypi Linux: Raspberry Pi kernel source Tools: Raspberry Pi cross-compilation tool Download mode: (1) Web download Download zip directly (2) Command download git clone--depth=1 Https://github.com/raspberrypi/linux git clone https://github.com/raspberrypi/tools Save path is ~/raspberry/under 2. Determine version 2.1 View information about the current Raspberry Pi compiler root

"1" Get the source codeDownload the SQLite source package and unzip it in the free user folder. "SQLite Download Link" July 2014 the latest SQlite3 source package name is sqlite-autoconf-3080500.tar.gz."2" Create a new folderCreate a new directory Opt/sqlite-rpi in the user directory. This directory is used to store files that are obtained after cross-compilation mkdir-p Opt/sqlite-rpi"3" Write an installat

Kernel build, kernel If necessary, patch kernel: Download patch: Wget https://www.kernel.org/pub/linux/kernel/projects/rt/3.18/patch-3.18.17-rt14.patch.gz // note patch and patchscd linux // kernel source code root directory zcat .. /patch-3.18.17-rt14.patch.gz | patch-p1 // patch, if .bz2 compression format, use bzcat; in the source code root directory of the upper directory, patch-p0 Modify the configuration on the existing system: Make mrproper // clear scp pi @ raspberrypi:/proc/config.gz.

Since the previous post was resolved by compiling the gpsd3.16 version of GPSD 3.11 after the Raspberry Pi does not work, you want to configure GPSD 3.16 to start automatically. But after a constant attempt to discover or not succeed, a learning document was found in the process: HTTPS://LEARN.ADAFRUIT.COM/ADAFRUIT-ULTIMATE-GPS-HAT-FOR-RASPBERRY-PI/USE-GPSD. I think the GPSD 3.16 itself is no problem. Just I was missing before using the command sudo g

the problem is between Liquidcrystal::write (uint8_t) and size_t print::write (const char*) two methods.The original code is as follows:1#include 2 3#include 4 5 /*6 liquidcrystal library-custom characters7 8 demonstrates how to add custom characters on an LCD display. 9 The Liquidcrystal Library works with all LCD displays that isTen compatible with the Hitachi HD44780 driver. There is many of One them out there, and you can usually tell them by the 16-pin interface. A - This sketch prints

PC environment Ubuntu 14.04 64 bitSet up the Cross tool chain 1. sudo apt-get install build-essential git 2.clone crossover tool chainCreate a folder under the home path named RPImkdir RPIEnter the directory and execute the clone operation CD RPIgit clone git://github.com/raspberrypi/tools.gitCD ~/rpi/tools/arm-bcm2708/cloning can be done by pull update Tools CD ~/rpi/tools Git pull OriginThere are 4 folder

The Raspberry Pi comes with a source of software that is 1 deb http://mirrordirector.raspbian.org/raspbian/wheezy main contrib non-free RPI Because the website is abroad, the download speed is very slow, so it needs to be modified as a domestic mirror site.Raspberry Pi (Raspberry Pi) domestic software source:Modifying a configuration file1 [email protected] ~ $ vi/etc/apt/sources.list23 deb http:// Mirrors.neusoft.edu.cn/raspbian/raspbian/wheezy Main