Compile and debug RT-thraed under fedora 12
1. Install the compilation tool
yum install sconsyum install python
Installation Tool arm-2010q1-202-arm-none-linux-gnueabi.bin, Which I installed in the/home/lixianjing/codesourcery directory will be referenced later.2. Download RT-Thread
[lixianjing@vm os]$ wget http://rt-thread.googlecode.com/files/
The problem of Vanilla kernel
Linux kernel cannot be preempted in spinlock, IRQ contexts, so the time that a high-priority task wakes up to execution cannot be completely determined. Also, the Linux kernel itself does not handle priority inversion. Rt-preempt Patch is based on the Linux community kernel, plus the associated patches to make Linux meet hard needs. This article describes the practice of the patch on the PC. Our test environment is Ubunt
1. After extracting the downloaded rt-thread-2.0.1, get the list of files as shown in the image below.
In the BSP directory you can find the stm32f40x folder, which includes library functions, and other chip platform folders are all deleted. Under Libcpu, just leave the common and cortex-m4 in the Arm folder, and all the rest is erased. There are some other supporting documents, such as documentation, examples, tools and so on we have all deleted, af
Assume that the RT to render a pixel,rt background color is B, in order to write the color, first write A1, then write A2, then the final color
Art = (A1 blend (A2 blend B))
Expand
A2 Blend B = A2 * F2 + b * f2 '
A1 Blend (A2 blend B) = A1 * F1 + (A2 * F2 + b * f2 ') * F1 '
Get:
ART = A1 * f1 + (A2 * F2 + b * f2 ') * f1 ' = A1 * f1 + A2 * F2 * f1 ' + b * f2 ' * f1 '
Make
C = A1 * f1 + A2 * F2 * f1 '
T = F2
With the advent of the Windows RT 8.1 Preview, the Outlook 2013 RT preview has also been exposed. According to the user, the Outlook 2013 RT preview has the same interface as normal Outlook 2013, but Outlook RT 2013 does have some business-related features in Outlook 2013.
Outlook 2013
RT-N16 is the legend of the Asus the highest end of a router, domestic more than one thousand, foreign 7, 8 hundred it (is a less than others earned, examples of higher costs than others ).
DD-WRT is a non-commercial third-party firmware that can be used for some wireless routers. Powerful, but friendly web management/configuration interface, provides many features not supported by the "original" vro, such as adjusting the wireless transmit power.
The
The applications of Rt-thread rtosintroductionThe user application is the application layer of Rt-thread RTOS. The developer can develop his/her application out of Rt-thread RTOS firmware environment.There is both mode for rt-thread applications,
Standalone Application
Shared Library
The standalone ap
The 13 things you should know about Win RT are:
1, WINRT only pre-installed in the corresponding electronic equipment, will not be sold separately (in other words, only OEMs can get WINRT system);
2, RT built-in BitLocker drive, you can better protect the role of user data, and will be opened by default;
3, WINRT provide USB and other means of peripheral connection;
4, with a large number of WIN8 functi
When it comes to Windows RT, most of the things that seem to be known are the following--it's a system that can only operate under the ARM framework but not under the X86 or X64 framework; the current surface on sale is the Windows RT system, Office 2013 is also built in. Beyond that, people seem to be ignorant. In order to change this embarrassing situation, Microsoft's Ron Grattopp has published a special
Background:The DICOM-RT Series blog focuses on the complementary criteria for radiotherapy in the DICOM3.0, namely Dicom-rt. In order to facilitate the follow-up on the dicom-rt of the relevant IoD, SOP concept of understanding, the column has recently done radiation-related knowledge points of popularization.PS: Of course, I am not a radiation professional, the
Learn about Linux, please refer to the book "Linux should Learn"
The birth of the 2012 Surface RT tablet is a tragic product, based on the ARM architecture running Windows RT operating system, but incompatible with the x86 environment, resulting in product and market positioning confusion, consumers are very confused, eventually after two generations went back to the x86 platform, Windows
This is seen in the concept of synchronization and mutual exclusion is very clear, reproduced from: http://www.cnblogs.com/King-Gentleman/p/4311582.html One, interprocess communication mechanism The IPC (inter-process communication, inter-process synchronization and communication) of the Rt-thread operating system contains interrupt locks, scheduler locks, semaphores, mutexes, events, mailboxes, message queues. Among the top 5, the main performance is
This is not the first time that Acer has published a "replaying ". When Microsoft entered the hardware release of its Surface tablet, Acer criticized Microsoft for competing with its partners. Acer compared hardware to food, And said Microsoft would not swallow it. Wang zhentang once bluntly stated that Microsoft's entry into the hardware field is destroying the entire computer industry ecosystem.
As the world's fourth largest PC manufacturer, Acer's "Windows" strategy is of great significance
It has been more than a month since Microsoft released its Surface tablet. According to official information, Surface RT will be available in Windows 8, and Surface Pro will be available three months later. We are expected to meet Surface RT in October this year. How do we choose Surface RT and Surface Pro?
First, let's take a look at the hardware configurations
In an official blog at office Next, Microsoft details office home and the student 2013 RT edition that comes free of charge with the Windows RT Tablet PC. Office Home Student 2013 RT Not only provides longer battery endurance, but also is very powerful on the arm platform.
"The development of Office home Student 2013 RT
Background:Radiotherapy is a complex process that requires multiple roles involving oncologists, analog location technicians, dosimetry, physiotherapists, therapists, nurses, and more. The whole process involves the imaging system, positioning System, planning system, treatment system, quality control QA system, information management system and other independent subsystems , compared to the conventional medical information system (such as his, RIS, LIS, PACS, etc.) there is a " low degree of in
When I bought the flight control board, I started to write the program for the lower computer. I was going to use UCOS because I used it before. I am familiar with it and can get started quickly, however, the seller of the Board recommended RT-thread, although there have been contact before, but it has never been used, so I went to the official website to read it, it feels pretty good. One is written by Chinese people, and the other is the basic task
After searching for a long time on the Internet, it is a bit confusing. This is the DT in the JDK configuration classpath. jar and tools. what are the two jar files? Some people say this DT. jar is about swing. Open this package and you can see the classes related to swing. If swing is used, configure the classpath, but RT. what about swing in jar? Isn't it actually including the swing class library? There is also whether the two packages are used as
all the time, the operating system has a kind of admiration and fear of emotion, on the one hand by the powerful operating system is deeply attracted by the complexity of the operating system, on the other hand fear. Remember in school when also learned some operating system of theoretical knowledge, but also only limited to theory, more like the same. Originally wanted to study the Linux kernel source code, but by the Linux kernel amount to frighten, such a large amount of code to clarify the i
Ruby tags define ruby annotations (Chinese phonetic notation or characters). Ruby tags are used with RT tags.A ruby tag consists of one or more characters (requiring an explanation/pronunciation) and an RT tag that provides that information, as well as an optional RP tag that defines what is displayed when the browser does not support Ruby markup.Basic syntax:Ruby>inRP>(RP>
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