process Analysis of registering platform_device from DTS file based on Linux 3.10.49 kernel
Linux kernel 3.10.49+Here, let's talk about how Linux registers and initializes onboard information through DTS for device (Platform_device).Locate the Dt_machine_start and Machine_end macros in ARCH/ARM/MACH-******/******.C, as follows:Dt_machine_start (******_dt, "************* SoC (flattened Device tree)"). Atag_
Original URL: http://www.cnblogs.com/biglucky/p/4057481.htmlOne, the main problem:When the system starts, it is how to load DTS;The Lk,kernel should be investigated.Two: Reference textThe DTS loading process looks like this:During the start-up process, bootloader (the default is BOOTABLE/BOOTLOADER/LK) chooses the appropriate devicetree to load memory according to the machine hardware information, and trans
DTS is a very useful thing in SQL Server. It is more appropriate to use it for data import to information systems. However, in SQL Server, data transmission is called only by database developers. operators do not understand database knowledge and can only write a program for data transmission.
Some articles on the Internet also describe how to adjust dtswhen using dtsrun.exe?
First, reference the Microsoft dtspackage Object Library
The code is very si
I. Main problems:How does the system load DTS at startup;Lk And kernel should be investigated.Ii. ReferencesShows the DTs loading process:During the boot process, bootloader (bootable/bootloader/LK by default) selects the appropriate devicetree to load the device into the memory based on the hardware information, and sends the address and other related information to the kernel. In the kernel, a device is c
This course aims to achieveIn the SQL Server Enterprise ManagerData conversion Service (DTS) designerCreate an analysis services processing taskTo achieve automatic extraction, conversion, and filling of the data required by the Data Warehouse-------------------------------(For details, refer toCreate an analysis services processing task)This example is as follows:Mini data warehouse building learning: daily household shopping expenses================
decoded video frames are displayed.
DTS: Decode time stamp. DTS mainly identifies when the bit stream in the memory is read into the decoder for decoding.
The sequence of DTs and PTS should be the same without B frames.
Different IPB frames:
I frame: You can decompress the image into a complete image by using the video decompression algorithm.
P frame: refer to
prediction frames;
PTS: presentation time stamp. PTS is used to measure when decoded video frames are displayed.
DTS: Decode time stamp. DTS mainly identifies when the bit stream in the memory is read into the decoder for decoding.
The sequence of DTs and PTS should be the same without B frames.
Different IPB frames:
I frame: You can decompress the video
Http://zhuweisky.cnblogs.com/category/62488.html
Currently, I am in charge of developing a data transmission system (DTS stands for data transfer system). I plan to write a seriesArticleTo record the entire process of development, this record can be said to be real-time-I will record it whenever an important problem is encountered or an important problem is solved. Teacher Hou Jie said, "posting is the best memory." In addition to taking notes, th
When using the DTS Wizard for SQL Server 2012 (Import and export data/imports exported data), the following issues occur:No problem when the source data is used directly from the tableHowever, if the source data is a query, the fields will be mapped to (varchar) and 202 (nvarchar)It is said that Microsoft has solved the bug:https://connect.microsoft.com/sqlserver/feedback/details/772761/ Dtswizard-in-sql-2012-sp1-no-longer-recognizes-nvarchar-varchar-
other for the offset of the slice base. The Length field is also a single cell, because only the offset portion of the address requires a range amount. So, in this example, each REG entry has three cells: the slice number, the offset, and the length.Because the Address field is contained in a node and its child nodes, the parent node is free to define any addressing scheme that is meaningful to the bus. Those nodes that are outside the immediate parent and child nodes typically do not care abou
In DTS development record (2) -- Data Pipeline and plug-in, we introduced the data pipeline. The CreateDataPipe method of IDataPipeFactory requires an IConnection parameter, which indicates a connection.Public IDataPipe CreateDataPipe (IConnection conn)
IConnection is defined as follows:/// /// IConnection indicates the connection to the data source or data target.
/// Public interface IConnection
{
ConnectionType {get ;}
String ConnectionText {get ;}
In DTS development record (4)- ing column, we have discussed in detail the source and target columns involved in ing. On the basis of the basic concept of ing columns, we can discuss data ing DataMapping.
Data ing consists of a set of mappingitems, which contain detailed and complete ing relationships between the source data outline and the target data outline.
Note that data ing is bound to the data outline, but not to any specific database table. In
During this period of time, we need to get the debugging and driver development work related to PCI Express. The old rule is that we should first look for information on the Internet. This kind of stuff is quite rare and we have already bought a book, I plan to summarize it by myself. This article describes how to configure the PCI bus in PowerPC.
PowerPC uses a mechanism called FDT flat device description tree to pass to kernel hardware configuration parameters to guide the kernel. This advanta
At91 dts driver programming model in linux 4.1.0, at914.1.0
The following driver file at91_keyled.c in the Atmel provided by the linux-at91-linux4sam_5.3 to achieve the key control LED light off process, this simple driver describes the DTS-based driver development model and the GPIO-related operation functions in the Linux kernel.
1 /**********************************************************************
1, now practical kernel 3.10 has begun to practical DTS method.
2, the DTS node of the wording
nodename@address{
compatible=xxx;
xxx;
};@Address is not necessary when the device does not have an address.
3, bootloader boot will load DTB to the kernel, the kernel analysis DTB can know machine, so bootloader no longer need to pass the device ID number.
For example:
/{
compatible = "rock
space.Devm_request_mem_region (pdev->dev, Res_mem->start, Resource_size (RES_MEM),Res_mem->name))Addr_start = Ioremap (Res_mem->start, Resource_size (Res_mem));The return value of Ioremap () is the virtual address of the resource.The resources for IO memory are given in the device tree source file (end of. DTS), the. dts file is used to describe the target board hardware information, and after Uboot is sta
DTS Parameter Passing example
--1. Set up a test table
CREATE TABLE TEMPDB.DBO.TB (id int)
--2. Create a new DTS package
To create in a package:A. Microsoft OLE DB Provider for SQL Server connectionB. Executing SQL tasksThe task's SQL statement is written on: Insert TB values (?)Click the Parameters button to open the Parameter Mapping dialog boxClick the Create global variable button to create a global var
the fieldDataType.
Here, Microsoft has done a good job. It stores the SQLDataType and Other TypesDataMatching of corresponding fields in databases such as oracle sysbase db2
SELECT * FROM msdb. dbo. MSdatatype_mappings you can find the matching field type here.
6. Next, pray for success.
II,Note:Items
1.Data TransmissionDataThe support is not very good. Big TableDataCannot be simple fromDataVolume definition, some tablesDataLarge, but few columns, dts
modifications made by any other concurrent transaction. When a transaction views the data update, the data is in the state it was in before the other transaction modifies it, or the state after the other transaction modifies it, and the transaction does not view the data in the middle state.
D. Persistence (Durability)
This means that as long as the transaction completes successfully, the updates it makes to the database must be persisted. Even if a system crash occurs, the database can be rest
DTS parameter transfer example
-- 1. Create a test table
Create Table tempdb. DBO. Tb (id int)
-- 2. Create a data transmission package
Create in the package:A. Microsoft ole db provider for SQL Server connectionB. Execute an SQL taskWrite the "SQL statement" of the task: insert TB values (?)Click "parameter" to open the "parameter ing" dialog box.Click the "Create global variable" button to create a global variable named value, whose type is integer
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