first to do the preparation work, need a USB flash drive not less than 8G, general image file about 4 to 5G, 8G of the USB stick is enough, of course, if you back up the computer data (if there is important information)
download system (image file), recommended to the computer app Store in the direct download, you can also go to the Apple website to download the pure version of the image file, the Internet is a number of third-party, afraid of a trojan such as unsafe
to insert a USB
has a standard style. Because of some of the habits or other reasons we used to write code in ANSI style or other more appropriate format, this will add an unnecessary burden to people when they read someone else's code, so go enforces the code format (for example, the opening brace must be placed at the end of the line), and code that does not follow this format will not compile , in order to reduce wasted time on typesetting, the Go toolset provides a go FMT command that can help you format y
1, in the MAC system to open the Launchpad interface
2, in Launchpad "other" folder to find "terminal" application
3, open the terminal, click on the Mac screen at the top of the menu in the Shell menu
4, then in the Shell menu, click "New Window-ocean" to create a new blue background of the terminal window, so that the screen snowflakes falling effects more beautiful
First of all, the next boom for MAC stuff is known to all, and of course boom does not just provide enhanced volume caps, including audio and video files stored on the MAC's ITunes library and on disk. By seamlessly transferring files and creating a separate playlist, you can enjoy a new volume enhancement experience with your iPhone, ipod touch, or IPad.
Second Open launchpad, point other-Audio MIDI settings-select built-in output (left)-4410
for Apple Mac computer "terminal" applications, may not be used in peacetime, so it should be more unfamiliar. In fact, this terminal application is used to allow users to directly input some system instructions, let it perform the appropriate operation, such as the simple display of the current directory of files, display date and time, delete files and other operations are OK. Here today we are going to show you how to achieve the snow effect on the Mac terminal window by entering specific ins
Immediately is Christmas, in order to let the festive atmosphere more strong, today PC6 small compilation to teach you Mac User A very interesting skill, let your Mac float white snowflakes, below with small weave together to see!
For Apple Mac Computer "terminal" applications, may not be used in peacetime, so it should be more unfamiliar. In fact, this terminal application is used to allow users to directly input some system instructions, let it perform the appropriate operation, such as the s
key to open Launchpad, search keyword "launchpad";
Then select "New Document" and select "Service" in the pop-up selection box;
In the top of the search box input keyword "applescript", the resulting "run applescript" directly to the right side of the generous box; "
See the selected text received by "service" on the line above the generous box, replace "text" with "no input";
You often experience adding software sources when you use the Ubuntu installer, the most common being the PPA software source.
For example: Use Ubuntu's pidgin for QQ chat:
sudo add-apt-repository ppa:lainme/pidgin-lwqq This is the command to add PIDGIN-LWQQ's PPA software source. The PPA is a service provided by the Ubuntu Launchpad website that allows individual users to be used as an apt source for downloading and updating by other users. Usually
If you do not have professional audio-visual equipment, I believe that your Mac device sound quality is difficult to have the ideal effect, and sometimes even the volume is not very high, obviously this is Apple's quality of this piece of the lack of attention, there is no way we automatically after the clothing and clothing, small series recommended the following three methods, I hope you can use.
First, the next boom for Mac this thing is believed to be known to everyone, of course, boom not
Many Mac users may be unfamiliar with the concept of "trigger angle" (hot corners) in the system. Today's small series to introduce you to this relatively "unpopular" function.
What is a trigger angle?
According to the Visual Fitzpatrick Law in software interface design (Fitts ' laws), buttons located at the edge of the screen are easier to click than others because your mouse cannot exceed the target in that position. As the most important two of the operating system user interface elements-
Environment configuration here will not talk about, go to Baidu or Google search it. Just start with the creation.
After the Xcode6-beta installation is complete, the icon will be found in the launchpad:
Launchpad:
Last Xcode6-beta version, click to enter:
Select the get started with a playground option:
After selecting the saved path and project name, click Create. When cli
. OBFUSCATOR-LLVM (OLLVM) is a code obfuscation tool developed by the Northwestern University of Applied Sciences Security Laboratory for LLVM compiled components, which is fully open source to increase the difficulty of reverse engineering and ensure the security of the code. OBFUSCATOR-LLVM (OLLVM) integrates compilers and is compatible with all languages supported by LLVM (c,c++, Objective-c, Ada and Fortran) and platforms (x86, x86-64, PowerPC, PowerPC-64 , ARM, Thumb, SPARC, Alpha, CELLSPU
update source solves this problem as below:
deb http://tinyos.stanford.edu/tinyos/dists/ubuntu hardy main
deb http://hinrg.cs.jhu.edu/tinyos oneiric main
2) update the knowledge base, open the terminal, and enter
Sudo apt-Get update
3) install tinyos
Sudo apt-Get install tinyos
Prompt for the optional tinyos version. Select the latest version 2.1.1.
Sudo apt-Get install tinyos-2.1.1
4) set Environment Variables
In ~ /. Bashrc or ~ /. Add the following code to the profile:
# Sourcing the tinyos
cannot apply after use.
Note: There are a lot of MSP430 in our lab. I still feel very good when I apply for Ti samples.
3. microchip, the speed is very slow, sometimes you have to go to the agent to get it. You can apply. There are not many sample types.
4. Maxim, needless to say, is recognized as the easiest way to apply for, that is, delivery speed is slow, Normal packages, Beijing delivery.
5. intersil: the speed is average and there are n
have time to get angry, I don't have time to be unhappy, and my technology is still poor. But I believe that after a while, I can be an exquisite electronic engineer with excellent technology and exquisite life.Thank you for reading this article.
Appendix 1: My long-term embedded technology learning plan:1. MCU classification: four-digit machine, 51, PIC, *** R, and MSP430 Series for learning;2. hardware knowledge: components, PCB wiring, classic cir
Nanjing Embedded Professional Skills Training Co., Ltd., founded in 2006, the registered capital of 5 million yuan. Developed to this day, has become a set of embedded engineers training, high-end software development talent practice, software technology development, IT consulting services in one of the high-tech enterprises.Over the past 10 years, China embedded education has always focused on developing and transporting high-quality software talents for the high-speed development of the Yangtz
The original project was to use the MSP430 single-chip microcomputer. one end of the key was connected to the single-chip microcomputer's IO port, and the other end was directly connected to GND. When no key is pressed, the IO port reads a High Level. when the key is pressed, the IO port reads a low level.
The EFM32 single-chip microcomputer is still the same as the key circuit. During the test, it was found that when several buttons are pressed, the
data sending and receiving. ATmegal28L exchange data and send commands with CC2420 through the CC2420 SPI interface (CSn, SO, SI, SCK), reset the chip using the RSTn pin, and enable the CC2420 voltage regulator using the VREG_EN pin, make it generate the 1.8 V voltage required by CC2420, so that CC2420 enters the normal working state. CC2420 communicates with each other through a single pole antenna or PCB antenna. Figure 4 shows the overall node architecture.
4 transplantation of zigBee proto
: CoAP and IOT system return JSON)CoAP Server code
Server-side code is relatively simple. Let's take a look.
if (req.headers['Accept'] == 'application/json') { parse_url(req.url, function(result){ res.end(result); }); res.code = '2.05'; }
Whether the request is in JSON format, and then returns a 205, that is, Content, which is designed to request a URL to return the corresponding data. For example
coap://localhost/id/1/
In this case, the request is for dat
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