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DDR1 clock problems, DDR1 clock Problems

DDR1 clock problems, DDR1 clock Problems I encountered a problem recently. I had a hard time tossing for a week and had a special crash! When the board is powered on, when reading data from Flash, sometimes an error occurs when writing data to DDR. For occasional errors, it is difficult to use reveal to locate the error online, and the location of each error is not the same. Today, the hardware engineer t

Summary of some problems when the set stores URLs and URL Problems

Summary of some problems when the set stores URLs and URL Problems Let's take a look at the question first: package com.lk.C;import java.net.MalformedURLException;import java.net.URL;import java.util.HashSet;import java.util.Set;public class Test3 { private static final String [] URLNAMES = { "http://www.sina.com",//202.108.33.94 "http://www.nuw.edu.cn",//124.115.173.252 "http://java

FPGA timing problems and fpga timing problems

FPGA timing problems and fpga timing problems Recently I made a project ------ 4 1080 p (1920x1080) to synthesize a 4 K (3840x2160,297 M) interface board. When 1080 p goes in and p goes out, the video is played normally. However, when P and 4 K are in progress, the video image will have water ripple. At that time, it was assumed that the timing sequence sent by FPGA to the downstream device SII9136 could no

Beginner iOS Encounters problems (ii) UIImage loading pictures encountered problems

. Creates a picture object, first looking for the object in the cache, and then fetching the object directly, No, the image resource is found from the bundle, and the object is created and returned. There are no picture resources in the bundle, then nil is returned. Objects created by Imagewithcontentsoffile:magewithcontentsoffile are not cached in system memory. The advantage is that the cache is not generated. Cons: Frequent use of s

Fragment construction problems, display text formatting problems in Android, determine which class is jumping into the current class problem

Xiao Kee 1. About the initialization of fragmentWhen we set up the interface using the avtivity+fragment combination, we usually have new fragment in the activity, but when we need to pass the parameters in fragment, Are we going to have a problem with the way we use the constructor in the fragment? Yes, we are using the method of construction in the Androidstudio parameter, will be error, simply said: "Fragment in the way the parameter assignment can cause a memory leak problem", the code

"Side do project side learn Android" small White will encounter problems--appcompat_v7 problems

/topics/ui/actionbar.html. So you can see that this project is intended to be compatible with the SDK for the lower version number.Workaround:Method one, because this project is to be compatible with the low version of the SDK generated, it is only necessary to create a new project when the minimum version number is selected as Android4.0.Method Two, not in the ADT update to the 22.6.x version number appears after the code, 22.3.x before the version number will not have, good then discard the ne

Solutions for memory leak problems when using twebbrowser (use SetProcessWorkingSetSize function, or modify Olectrls.pas source to solve problems)

);Result: = IDispatch (Temp.vdispatch); Change to:Pointer (Result): = Temp.vdispatch; This avoids the extra AddRefEndfunction Trsolecontrol.getiunknownprop (Index:integer): IUnknown;VarTemp:tvardata;BeginGetProperty (Index, Temp);Result: = IDispatch (Temp.vunknown); Change to:Pointer (Result): = Temp.vunknown; This avoids the extra AddRefEndEnd.Another way to modify the source file is as follows:Zhongs recommends adding an intermediate class to fix this problem in the middle of the inheritance r

What should I do if blue screen problems occur in win10 and blue screen problems occur in win10?

What should I do if blue screen problems occur in win10 and blue screen problems occur in win10? In win10, have you ever encountered a frequent blue screen situation? This situation is sometimes caused by low computer configuration, and may also be caused by the computer itself. Of course, this can be repaired, let's teach you how to fix it today. First, click the dialog box in the lower-right corner of

Ruby string and array maximization problems, ruby Problems

Ruby string and array maximization problems, ruby Problems Max Method b=[1,3,55,777,2,4,6,8,0] For numeric data, max obtains the maximum value of the array, and min obtains the minimum value of the array. b.max => 777b.min => 0 It has no practical significance for comparing the size of string arrays,The example in ruby is # enum.max -> obj# enum.max { |a, b| block } -> obj#a = %w(albatross dog horse

Summary of some problems when the set stores URLs and URL Problems

Summary of some problems when the set stores URLs and URL Problems package com.lk.C;import java.net.MalformedURLException;import java.net.URL;import java.util.HashSet;import java.util.Set;public class Test3 { private static final String [] URLNAMES = { "http://www.sina.com",//202.108.33.94 "http://www.nuw.edu.cn",//124.115.173.252 "http://javapuzzlers.com",//208.97.154.9 "http

Single-and-double cited problems in the Python sequence-unsolved, python Single-and-double cited problems

Single-and-double cited problems in the Python sequence-unsolved, python Single-and-double cited problems When I learned the basics of python, I encountered the following problem: Tuple = (2, 2.3, "yeah", 5.6, False)List = [True, 5, "smile"] The input result is as follows: (2, 2.3, 'yeah', 5.6, False) [True, 5, 'smile '] I don't understand why the output is a single lead, so I tried the followi

Apple and bug problems C ++ and Apple bug problems C

Apple and bug problems C ++ and Apple bug problems C If you need to reprint, please indicate the source: http://www.cnblogs.com/wongyi/p/8205305.html Recently, I have been giving some questions to the students. I thought it would be more concentrated to write the questions. The problem is as follows: Apple and bugs: You bought a box of n apples. Unfortunately, when you buy a box, the box is mixed into

about problems encountered during the use of the For () loop (problems encountered in Tetris games)

Definition of A For loop:for (parameter 1; parameter 2; parameter 3), parameter 1 is usually the initialization parameter, parameter 2 is the judgment, Parameter 3 is the operation of the parameter. None of these three parameters is required.Here is to say, the use of parameter 1: such as the following language                int nLine = 0, nList = 0;1. for (nLine = 0; nLine {......;}2. for (; nLine {......;}Here the parameter 1 is already initialized outside the for loop, does it need to be ini

How to think about problems and solve problems ZKC seniors ' welfare

number of cookies the classmate should have.Now if a is in front of B then the number of loaves obtained by a T/R.A B is t*la/rbNow, if B is in front of a, then B gets the number of loaves t/r.b a gets, the number of loaves is T*lb/raSuppose a must be in front of B so it must be deduced. An expression with four variables is used for sortingNow the key is why a must be in front of b the outermost reason is that in order to get the largest number of biscuits to get the biscuits as little as possi

Using project thinking to analyze problems and solve problems in MATLAB

;%according to the discriminant type of discussionifdiscriminant >0%two x real roots x1= (-b+sqrt (discriminant))/(2*a) X2= (-b-sqrt (discriminant))/(2*a) disp ('two Yuan the first equation has two unequal real roots! '); fprintf ('x1=%f\n', X1); fprintf ('x2=%f\n', x2); ElseIf discriminant==0X1=-b/(2*a) disp ('two Yuan the first equation has two equal real roots! '); fprintf ('x1=x2=%f\n', X1);ElseReal_part=-b/(2*a) Image_part= sqrt (ABS (discriminant))/(2*a) disp ('two Yuan the first equation

A summary of the problems of 05-string and the experimental problems after class

string:"); Scanner SC=NewScanner (system.in); String S=Sc.next (); Sc.close (); Zhuanhuan (S); } Public Static voidZhuanhuan (String a) {CharCode; for(intI=0;i) { if((A.charat (i)) ) Code=(Char) (A.charat (i) +3);//Note: The subscript for Charat is also starting from 0 ElseCode=(Char) (A.charat (i)-23); System.out.print (Code+ " "); } }}4. Results:Five. After-school assignment string encryption, hands-on Brain string.equals () method, sorting

Analysis of problems and problems encountered in MyBatis configuration

two child elementsParam-name and Param-value.Set the context nameset the value of the context nameExample:The parameters that are set in the JSP Web page can be obtained using the following methods:${initparam.param_name}if the servlet can use the following methods to obtainString Param_name=getservletcontext (). Getinitparamter ("Param_name");Callout 9:In Java Web Development, the session provides a lot of convenience for us, the session is maintained between the browser and the server. The se

Development Environment Problems (win7 + vbox + centos + nginx + php), problems with saving JS files

Development Environment Problems (win7 + vbox + centos + nginx + php), saving JS files problems in order to develop well, I downloaded vbox and shared folders in win7, the development environment is set in centos in vbox. However, when saving the js file, some inexplicable things appear in it. when the browser reads the JS file, an error is reported. However, this file can be opened and saved in linux. I

Why is my website very stuck, system problems or hardware problems?

Why is my website stuck? is it a system problem or a hardware problem? I am using a VPS server, memory 1G nbsp; ECC, dual-core CPU, 70G hard drive, 3 M dedicated bandwidth, 4-wire, WIN2003 system because the website is still in beta testing, therefore, the number of online users is no more than 10. now the website is stuck for a few minutes and sometimes gets stuck. you need to log on to the webpage again. I asked the server provider, they said that the hardware configuration is too low, and th

[Typical operating system problems] Analysis of reader Problems

Philosophers dining problems are very useful in modeling processes such as competition for mutually exclusive access to limited resources (such as I/O devices. Another famous issue is the reader-writer issue (Courtois ).Et al., 1971). It creates a model for database access. For example, imagine an airplane ticket booking system in which many competing processes attempt to read and write data. Multiple processes can read the database at the same timeBu

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