sflow rt

1. How does one implement the system clock interrupt driver rt-thread when the thread time slice is exhausted or the thread is awakened and scheduled after sleep for a period of time? Who is driving this process? The answer is the clock interruption source. Let's take a look at the clock interruption routine: In bsp/stm32f20x/drivers/board. the c source file contains the code of such a clock interruption routine: (the MCU of stm32f20x is used as an ex

The idle thread of rt-thread is executed when the thread is idle. Its main operation is "Garbage Collection", where "garbage" is the thread to be closed. 1. When the rt-thread starts to run the idle thread, the system initializes the idle thread and starts it: [cpp]/*** @ ingroup SymstemInit ** This function will initialize idle thread, then start it. ** @ note this function must be invoked when system init

The main function of the Rt-thread system is located in the Startup.c file./** * This function would startup Rt-thread RTOS.*/voidRtthread_startup (void){ /*Init Board*/rt_hw_board_init ();//Nvic_config, Systick_config, Serial_device Register, set CONSOLE for Output (rt_kprintf (...)) in BOARD.C /*Show Version*/rt_show_version ();//Show the version of Rtthread by serial device (set to being console-de

My base: Can be under the existing C program to make some changes, will not be transplanted, will not write the driver, it is difficult to write the program from start to finish.Rt-thread Foundation: Before looking at a little rtthread_manual.zh.pdf (that is, Rt-thread user manual), found very ugly understand, only understand some basic knowledge, such as thread scheduling approximate meaning. Decide to go directly to the program, do not understand th

In the upper (refer to: http://blog.csdn.net/flydream0/article/details/8719036 ). Here, we assume that you have a good understanding of the ELF File Format and have a thorough understanding of the source code of the _ load_shared_object function. This gives you a thorough understanding of how RT-thread inputs a shared target file. The _ load_relocated_object function is divided into four steps: Allocate and initialize memory. Based on the order of

highest priority and starts execution. It applies for a semaphore and then releases it. In this case, both the pri1 and worker processes are in the ready state, and the worker process goes to sleep first. The process pri1 starts execution. The process pri1 requests a semaphore and starts output. After that, the process pri2 was ready, but it found that the semaphore was used when applying for the semaphore, so it began to wait for the semaphore. After the worker process is ready, it will seize

Http://www.cnblogs.com/King-Gentleman/p/4278012.htmlFirst, prefaceThe thread scheduler provided in Rt-thread is based on all preemptive priority scheduling, in addition to the interrupt handler function, the code of the lock part of the scheduler and the code that prohibits the interrupt, the other parts of the system can be preempted, including the thread scheduler itself. Total 256 priority levels supported by the system (0 ~ 255, the smaller the pr

First, prefaceThe thread scheduler provided in Rt-thread is a scheduling based on full preemption priority , in which the other parts of the system can be preempted in addition to the interrupt handler function, the code of the lock part of the scheduler, and the code that disables the interrupt . This includes the thread scheduler itself. The system supports a total of 256 priorities (0 to 255, the lower the priority, 0 is the highest priority, and 2

Today, another talented netham45 in the XDA Developer Forum released a Windows RT Flat-Panel Jailbreak tool that uses the CLROKR jailbreak program. It modifies a specific part of the Windows RT system kernel, allowing users to change the system's minimum signature level and run unsigned applications. We first download rtjailbreak. Rtjailbreak Installation: Unzip the tool on the Tablet machine and double-c

Indicate the source and author's contact information during reprinting.Article Source: http://www.limodev.cn/blogAuthor contact: Li xianjing Embedded GUI RT-THREAD/ftk 0.6 Release Notes O add tab widgetO add file browser widgetO add opengles backendO Port to AndroidO Port to RT-ThreadO Port to winceO Port to iPhoneO more maintenance ation.O multi font size supported.O re-implement window animation.O Requ

1 Preface The previous chapter summarizes the source code analysis for loading shared files. Previously, RT-thread currently supports shared files and relocated files, which is also the purpose of this chapter. A relocated file is simply a. o file that contains code and data suitable for creating executable files or sharing target files through links to other target files. In rt-thread, this loading process

For more information about realboard, visit the official website www.hugacy.com. Thank you for your attention to the realboard. Thanks again, especially for the large number of users who sent emails to ask.Given that some netizens suspect that realboad is slower than qemu, the test method is as follows: Test method:Run two batch programs respectively, and use stopwatch or PC clock timing (about 1 minute or so) Timing Method:Start the program and start timing;The UI screen is timed out. Test Code

From the Dolby metadata guide:In each of these devices, the analog stereo output is one of two different stereo downmixes.One type is a stereo-compatible Dolby Surround downmix, of the multichannel source program that is suitable for Dolby Surround Pro Logic decoding.This kind of downmix is also called Pro logic or left total/right total (LT/RT ).The other type is a simple stereo representation (called left only/right only, or Lo/RO) suitable for play

Comparison of functions in three versions of Windows 8 Microsoft (Weibo) announced today that four versions of Windows 8 will be released for major enterprises in household use, enterprise, ARM architecture, and bulk procurement. For most desktop and notebook users, only Windows 8 and Windows 8 Pro versions are available. The latter includes functions such as encrypted file system, virtualization, and domain name management. Windows RT is designed

Http://onlylove.javaeye.com/blog/155095 1. Click "window"-> "Preferences"-> "Java"-> "installed jres" 2. in this case, the right side of "installed jres" is the List Pane, listing the system's JRE environment. Select Your JRE and click "Edit... ", a window appears (edit JRE) 3. Select the Rt. jar file: "C:/program files/Java/jre_1.5.0_06/lib/RT. Jar"Click "+" on the left to expand it, 4. after expansion

I have been writing someCodeIf some packages in rt. jar are referenced, for example: ImportSun. Misc. base64decoder ImportCom.sun.net. httpserver. headers; The error message is:Access restriction: The type base64decoder is not accessible dueRestrictionOn required library D:/Java/JRE/lib/RT. Jar The solution is as follows:1. Open project properties.2. Select Java build path node.3. Select libraries

1. Click "window"-> "Preferences"-> "Java"-> "installed jres" 2. in this case, the right side of "installed jres" is the List Pane, listing the system's JRE environment. Select Your JRE and click "Edit... ", a window appears (edit JRE) 3. Select the Rt. jar file: "C:/program files/Java/jre_1.5.0_06/lib/RT. Jar"Click "+" on the left to expand it, 4. after expansion, You can see "Source attachment :( none)

There is an Asus Tablet in the store today. The installed system is a Windows RT Tablet system. I don't know which customer has set a password, so I need to reinitialize it and check it online, many of them need to be in the system to reset the password or initialize the computer. But this computer is set with a password and cannot access the system. Later, we can see that there is another shortcut key that can directly enter the recovery mode, th

First, dynamic memory managementDynamic memory management is a real heap memory management module that allocates memory blocks of any size, depending on the needs of the user, in the case of current resource satisfaction. When users do not need to use these memory blocks again, they can be released back into the heap for use by other apps. In order to meet different requirements, Rt-thread system provides two different dynamic memory management algori

uart_rx_buffer[64]; static Char msg_pool[2048]; Serial Listener callback function rt_err_t uart_input (rt_device_t Dev, rt_size_t size) {struct rx_msg msg; Msg.dev = Dev; msg.size = size; Put the received content into the message queue Rt_mq_send (AMP;RX_MQ, msg, sizeof (struct rx_msg)); return rt_eok; }//Task entry function void Usr_echo_thread_entry (void* parameter) {struct rx_msg msg; rt_device_t device; rt_err_t result = Rt_eok; Acq