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Linux using IIC Bus Read and write I2C from device registers by Handavei @ Jilin Normal University handawei@jusontech.com reproduced please be sure to indicate the source ******************* ******* 2012.7.16 1, this paper gives the implementation program of I2C from device using IIC bus under Linux. 2, this paper gives some very hidden error solutions in programming. 3, this article's reading and writing program is very general: i2c-d/dev/i2c-1-S 0x5

?? This blog post by Csdn blogger Zuishikonghuan made, copyright Zuishikonghuan all. Reprint Please specify source: http://blog.csdn.net/zuishikonghuan/article/details/50380313Is talking about driving development, here suddenly inserted a Win32 blog post. In fact. Or as a primer, in the previous post "IRP and dispatch function", we know that the driver needs to handle I/O requests. Let's take a look at how to make an I/O request.The general program does not go directly to the disk, after all, th

Need more time to read? Get rid of your TV. Do you have time to read books? Stay away from TV! In learning Optimization One of the most common questions people ask me is: "How do you find time to read all of these books, work on new projects, and maintain this site when you have a full-time job?" One of the most frequently asked questions is: "You have a full-ti

Winxp,win7,win8 Copy Code code as follows: ' Original content reprint, the reference code core part please indicate the source Hard disk read and write statistics. vbs If (Lcase right (wscript.fullname,11) = "Wscript.exe") Then CreateObject ("Wscript.Shell"). Run ("%comspec%/C" AMP;CHR "mode con cols=52 lines=22" "title hard Drive read-write statistics. vbs BY:FASTSLZ PCEVA Or Batho Me cscri

Recently, libpng and libjpeg have been used in our work to parse images. We need to parse RGB data, provide 8-bit and 24-bit 2 excuses, and scale images, I have written my own code based on my articles from various friends on the Internet, and I am posting it for your reference. 1. read from a file: Bool pngimage: loadfromfile (const char * path, image_type type){// Re-Initialize to prevent loading multiple images.M_good = false;M_width = 0;M_height =

Mysql read/write splitting implemented by mycat and mycatmysql read/writeMycat is a middleware that can be used for mysql read/write splitting, data sharding, table sharding, and disaster tolerance backup. It can also be used for multi-tenant application development and cloud platform infrastructure, this gives the architecture great flexibility and scalability,T

Non-real read/write locks, non-real read/write locks There is a single write thread and multiple read threads are concurrently used. For example, when reading and updating measurement data, there are many consumers and there is only one producer. Example: The left side is a classic solution that locks the entire data operation. It is a waste of time to lock all

PHP file opening and reading is very important for PHP, this article will explain in detail the PHP file open and read the relevant knowledge. PHP Open File-fopen () A better way to open a file is through the fopen () function. This function gives you more options than the ReadFile () function. In the course, we will use the text file "Webdictionary.txt": AJAX = asynchronous JavaScript and XMLCSS = cascading Style SheetsHTML = Hyper Text Markup Langua

POI-Microsoft Office read/write support, npoi read/write word I recently made a small project. one stage is to save the data in the set to a local Excel file and read the local Excel file to the set. Poi' To put it simply, POI is provided by apache and supports reading and writing documents in Microsoft Office format! HSSF-provides the ability to

Release system memory in time We know that when running some large capacity programs or games, you need to consume a considerable amount of system memory resources, if there is not enough memory space, then the system memory read and write error tips are likely to occur. In order to effectively avoid this kind of error, we'd better start the computer system before we run a larger program or game, so that we can fully release the system memory space,

A further step, for everyone to test, if manually the buffer header buffer pin memory bit set to 1, which is equivalent to adding a shared buffer pin lock, then another session, update this block, what will happen? 1, take T1 table of the first row of data to do testing:Sql> Select Rowid,dbms_rowid.rowid_relative_fno (ROWID) file#,dbms_rowid.rowid_block_number (ROWID) Block#,id, Name from Gyj.t1 where Rownum=1; ROWID file# block# ID NAME------------------ ---------- ---------- ---------- ----

Do the project process encountered to resolve more than 100 m TXT file, and warehousing. With the previous FileInputStream, BufferedReader obviously not, although readline this method can be read directly by row, but to read a 140M or so, 68W data files, not only time-consuming and will overflow memory, That is, you can't wait until you've read the 68W data, the

Label:For the release of the system is a common thing, sometimes need to isolate the changes to the database but also require the ability to read the data, for MSS SQL This is very simple, direct properties------read-only, but for MySQL this is different, We've been doing a little research today. MySQL for Singleton and instance read-only settingsHere does not in

On the internet to see a lot of examples, the result is very disappointing, so decided to write an example, to provide you with reference to study; no more nonsense. See examples directly: Package com.em.test.client; Import Java.io.BufferedOutputStream; Import Java.io.File; Import java.io.FileNotFoundException; Import Java.io.FileOutputStream; Import java.io.IOException; Import Java.io.InputStream; Import java.util.Enumeration; Import Java.util.zip.ZipEntry; Import Java.util.zip.ZipFile; /

FileInputStream InputStream = new FileInputStream ("C:\\source.txt"); StringBuffer buffer = new StringBuffer (); String Line; Used to hold content read per row BufferedReader Bufferreader = new BufferedReader (new InputStreamReader ( inputstream)); line = Bufferreader.readline (); Reads the first row while (line!= null) {//If the line is empty description read buffer.append (line);//Add

readfully readfully (byte[] b) Throws IOExceptionReads some bytes from a input stream and stores them into the buffer array B. The number of bytes read is equal to the length of B. This method blocks until one of the following conditions occurs: B.length bytes of input data is available, with which case a normal return is made. End of file is detected, in which case an eofexception is thrown. An I/O error occurs, in which case a ioexce

Python3 Chinese file read/write method, python3 read/write The character string is Unicode encoded in Python. Therefore, during encoding and conversion, Unicode is usually used as the intermediate encoding, that is, the other encoded strings are decoded into Unicode, then, convert the Unicode encoding (encode) into another encoding. In the new version of python3, the unicode type is removed, instead of the

In Qt, we sometimes need to write some parameters to the XML file, so that we can read it later, like an archive read operation, for example, we want to generate the following XML file:XML version= "1.0" encoding= "UTF-8"?>Parameters> para1>1para1> Para2>2Para2> Para3>3Para3>Parameters>The write operation is described in the following code:voidqtmainwindow::on_actionsave_triggered () {QString filen

Servlet read/write operations on files, servlet read/write operations (1) how to read the file content in serlvet Package com. tsinghua; import java. io. *; import javax. servlet. http. *; public class ServletFileTest1 extends HttpServlet {public void doGet (HttpServletRequest req, HttpServletResponse res) {try {// Chinese garbled res. setContentType ("text/html

This article introduces java File Read and Write instances, including saving remote files to this address and reading and writing csv files. If you are interested, refer. File file = new File ("http: // 127.0.0.1: 8080/aa.txt") cannot be used directly for reading, because the transmission protocol on the network is HTTP, which is different from that on the local machine, use URL to read The Code i