3 3 v relay board

After the completion of the "Weibo focus on people" this application although the final completion of the distance is not small, but the visual has been compared to the completion of the exercise (1) a great improvement. :] Careful friends in the last walkthrough, we have found that there is a field named "category" in the data structure that we define, and the setting of this field is primarily used to help us better manage our objects of concern. The walkthrough in this article simp

statement for recovery (note: The MySQL server must be closed before recovery and the original data and logs have been deleted): Innobackupex--defaults-file=/opt/mysql/my.cnf--user=root--password=***--use-memory=4g--apply-log/data/mysql/ Backup/2013-11-27_18-18-51 Innobackupex--defaults-file=/opt/mysql/my.cnf--user=root--password=***--copy-back/data/mysql/backup/2013-11-27 _18-18-51 When the restore is complete, start the MySQL server: Service mysqld Start

Control Message Protocol (Internet Command message PROTOCOL,ICMP) to provide network diagnostic information.　　Third Layer Transport LayerThe transport layer corresponds to the transport layer of the OSI seven-layer reference model, which provides two types of end-to-end communication services. Where the TCP protocol (transmission Control Protocol) provides reliable data flow transport services, the UDP protocol (use Datagram Protocol) provides unreliable user datagram services.　　Layer Fourth Ap

information shown in 6-8 is output, and a wordcount file is added (in the white box ). To view the master and secondary device numbers of the wordcount device file, run the following command. # Ls-L/dev Run the preceding command to output the information shown in 6-9. the first digit in the white box is the master device number and the second digit is the slave device number. Use the following command to display the main devices and device numbers in the current system. # Cat/pr

= NULL)Reg = of_get_flat_dt_prop (node, "Reg", L );If (REG = NULL)Return 0;Endp = reg + (L/sizeof (_ be32 ));/* If the reg attribute value is an array of address and size, how can we retrieve address/size? Because memory node must be the child of the root node, the sum of dt_root_addr_cells (root node's # address-cells attribute value) and dt_root_size_cells (root node's # size-cells attribute value) is address, the entry size of the size array. */While (endp-Reg)> = (dt_root_addr_cells + dt_r

This headline is definitely not sensational: let's see. zhejiang University Office Enterprises, local consumer associations issued "trustworthy Enterprises" dare to Counterfeit as CN domain name registrars ( http://www.w.org.cn/user1/4/archives/2007/1255.html Will be able to understand that it is one of the key issues in ensuring the rights and interests of consumers (domain name registrars) that the registrar is "in" . Here are a few "dirt" methods : ICANN Office of domain name registrars On th

At present, China's routing industry is developing at a high speed, and it also promotes the constant update and upgrade of routing technology. Here we mainly explain the connection methods of layer-3 routing switches. As for the stack of routing switches, not all vswitches are allowed, but stack modules are required. The stack of A vswitch is connected through a dedicated stack cable instead of a switching port. Note that the stack of the route switc

) grasp the implementation and changes of the tax laws of the subsidiaries and subsidiaries, and make corresponding adjustment measures or make suggestions to the board of directors of the company; (2) assisting or handling the tax affairs of subsidiaries and subsidiaries; (3) summarize the tax payable by the company's unit and analyze the benefits; (4) coordinate tax matters between the departments of the

A. Helpful mathstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputXenia The beginner mathematician is a third year student at elementary school. She's now learning the addition operation.The teacher have written down the sum of multiple numbers. Pupils should calculate the sum. To make the calculation easier, the sum is only contains numbers 1, 2 and 3. Still, that's isn ' t enough for Xenia. She is

board, some said to buy the PRC 2706 USB DAV sound card, about 50RMB, investment is not small. Here are 2 proposals Scenario 1, if you bought a Raspberry Pi 3 motherboard bought HDMI VGA interface line, then you are lucky, directly to the HDMI interface to the Raspberry Pi motherboard, HDMI interface powered by the Raspberry Pi motherboard USB interface, HDMI to VGA interface line also has an audio output

analyze the performance indicators of various products. However, for example, switching capacity Gbps) and Board bandwidth Gbps), processing capability Mpps), throughput Mpps) and many other technical indicators, you 'd better grasp the "throughput when the configuration is full", because other technical indicators users are generally unable to measure, only throughput is an indicator that users can use Smart Bits and IXIA testing instruments for dir

work:Brush the Raspberry Pi 2 for the win IoT core systemDeploying a PC for the Visual Studio 2015 development environmentRed, yellow, green 3 colors of light-emitting diodes220R ResistorGPIO Expansion BoardIDC LineDuPont LineBread Plate1. Installing componentsThe Gpio expansion board is first installed on the breadboard and then connected to the Gpio interface of the Raspberry Pi 2 via the IDC cable.The f

importantly, the fork "init" process to start the entire multi-task environment.We can add some specific content in init.(2) device drivers: Device Drivers occupy a large part of the Linux kernel. Like other operating systems, device drivers provide interfaces for the hardware devices and operating systems they control.In chapter 4, we will explain how to write the driver separately.(3) file system: one of the most important features of Linux is supp

deal have to do with love? Answer: No! ）。 Again "gossip": To learn batch processing, DOS basic must be in prison! Of course, brain flexibility is also a very important aspect. Example one, first give a most easy batch script let everyone and it face familiar with it, the following lines of command to save as Name.bat and then execute (in the next article only give code, save and execute similar): Ping sz.tencent.com > A.txt Ping sz1.tencent.com >> a.txt Ping sz2.tencent.com >> a.txt Ping sz3.

under the Web layer layer. 2, we need to change the background layer to a shared layer, open the level board, switch to the background layer, select Share this Layer in the pop-up menu, share the background layer, the content on this layer will be visible in all frames, and a shared icon will appear at the end of this layer, as shown below: 3, switch to the logo layer, in the upper-right corner of the doc

Original link: http://www.codeceo.com/article/web-artch-storage-3.htmlStorage bottlenecks are now going into the deep-waters, if we have to do the site has been to do a vertical split of the database and horizontal split phase, then we face the challenges of technical difficulties will be greatly enhanced.Here we review the definition of vertical split and horizontal split of the database:Vertical splitting: Separate data from different business units

files and does not add the hardware device to the system, it needs to be handled manually.(2) How does the Development Board enter Linux and VV mode?After the board is successfully connected, enter the Linux mode, type any other key, and enter the VV mode if you type enter the ENTER key... The problems encountered during the experiment and the solutions. (1) Related software and driver instal

C ++ classic programming question #1: contains k numbers of 3, programming Total time limit: 1000 ms Memory limit: 65536kB Description Enter two positive integers m and k, where 1 For example, enter:43833 3If the conditions are met, the output is YES.If you enter:39331 3Although there are three, but cannot be divisible by 19, does not meet the conditions, should output NO. Input M and k values, s

speed (that is, uploading data to the Internet ), the downlink column is of course the user's downstream speed (the data is downloaded from the Internet to the user's computer ). As shown in figure 8, the author uses a 2 Mbps ADSL line with a behavior of 512 Kbps and 2048 Kbps. This data varies across regions. Figure 8: the uplink/downlink speed of the line is displayed. (3) The WAN interface displays the ADSL interface software name and various sett

Ucgui (emWin) 2-d Graphics Library-The basic board drawing, in the basic graphics function of Ucgui, the function is still relatively full, this routine mainly uses the basic interface, the two main concept is to draw (draw) and fill (fill), the difference between the two is a hollow, Another is solid, time to note added to the distinction, another noteworthy is the drawing mode, Gui_setdrawmode (), the current emWin5.2 has two modes, one is normal dr