Song Baohua Barry Song 1. ARM Device Tree Origin
Linus Torvalds's ARM Linux mailing list on March 17, 2011 declared "This whole arm thing is a f*cking pain", triggering an earthquake in the arm Linux community, followed by a series of arm communities Significant revisions to the column. In the past of Arm Linux, arch/arm/plat-xxx and arch/arm/mach-xxx were filled with a lot of junk code, and quite a few of the code was just describing board-level det
When I participated in the network engineering construction of some companies, I found that most of the company's choice of switches is still in the past, regardless of the enterprise intranet division based on subnets of different departments, generally, you only need to connect all the computers with a 10-ge switch.
This requires dedicated enterprise-level traditional routers, such as CISCO 2600 series access routers, to access frame relay before AD
project and any necessary changes made to keep the project from off track. The proposed changes should be reviewed by the Change Control Board (CCB) to ensure that the changes are realistic and can be accepted by the project's overall schedule.
Software Subcontract Management
The purpose of subcontract management is to select qualified software subcontractors and manage them effectively. It comprehensively considers the basic management control of
downstream adjustment, and electric upstream and downstream adjustment.
1. Manual up/down adjustment
You need to manually adjust the vertical distance of the steering wheel.
2. Manual up and down before and after adjustment
The steering wheel axis distance must be adjusted manually.
3. Electric upstream and downstream Adjustment
It provides an electric steering wheel vertical and axis distance function.
●Analog clock
A simulated clock is a clock tha
To get a PMAC card, first we have to look at his hardware composition (DSP) and the various interfaces (I/O, serial, etc.) provided, and then start to do the preparation (set the jumper), and finally the installation (Socket PCI and adapter board).Hardware composition and interface PMaC is based on the Motorola DSP servo control card, different types of PMAC can control the maximum number of axis channels, DSP models are not the same. There is a speci
Access control is sometimes critical for the reliability of a device node. This part of content is only modified on the open and release methods, and some check mechanisms are added.
Exclusive Device
The most rigid access control method is to allow a device to be opened (exclusive) by a single process at a time, which is the simplest access control for a device driver. The implementation is very simple. For specific code, see the experiment source code! Module Program link:
Scullsingle.tar.gzMo
Chapter 3 add data production for the HLR Board
To add a new HLR Bureau in this province, You need to define the signaling points, Signaling routes, and other data in MSC. You also need to define a GTRC pointing to this HLR. Under normal circumstances, the new HLR board will also have several number segments cut into the Bureau, you can refer to "data production
, sector 0Fat: unable to read Boot SectorVFS: cannot open root device "mtdblock2" or unknown-block (31,2)Please append a correct "root =" Boot option; here are the available partitions:1f00 192 mtdblock0 (driver ?)1f01 1856 mtdblock1 (driver ?)1f02 30720 mtdblock2 (driver ?)1f03 32768 mtdblock3 (driver ?)Kernel panic-not syncing: VFS: Unable to mount root FS on unknown-block (31,2)Possible problems:A. MTD partition does not match bootloaderB. No support for the devfs File SystemC. ECC verificati
Figure 55
3 the link to do QQ and the previous slightly different, because we look at the QQ user's data address is http://search.tencent.com/cgi-bin/friend/user_show_info?ln=******, So what we're going to do is replace the asterisk with the QQ field data, as shown in Figure 56
: 3
It is really difficult to use a memory module in QT. According to the previous article, the Lib with QT with runtime has been compiled. In order to compile this QT, we installed the dbus-1.0.2 first.
Cross-compile our QT program on the PC. After generating the. Pro file, remember to add QT ++ = composer. Because token is an optional module, QT cannot be found if it is not added. However, other modules, such as QT + = core gui qt + = network, do not add or report errors.
If you cross-compile th
you still understand 0x01c80000? Go to the 4-3 pages of the Data Manual. There is an assembly example. Why is this 32-bit register set.
Don't look at what I installed here, but I will deal with it. Don't be honest with me. I am still studying it :)
Note: By the way, let's talk about a small problem. Some friends asked "Why does the address line on the schematic diagram Start from A1, rather than A0" and read the data manual (in English) on pages 4-4,
In this paper, 3 times spline function is used, and the fast calculation method of piecewise interpolation is applied to achieve the use of mouse to draw any smooth curve on the screen, and the fitting method of line resampling is used to remove redundant interpolation points. The algorithm described in this paper can be used to draw smooth curves such as contour lines, and because of the use of the line of resampling, the smallest amount of data to e
simple way. Similar to TAG and ATM switching, a fixed-length short Label is introduced as the basis for data forwarding in MPLS networks.
MPLS networks are composed of label exchange router LSR and Label Edge Router LER. LDP is used to distribute tags between LER and LSR. That is to say, when each MPLS device runs a layer-3 routing protocol such as OSPF and BGP, it uses the Label Distribution Protocol based on the calculated route to allocate tags to
; while (I#36 Valid SudokuDetermine if a Sudoku is valid, according To:sudoku puzzles-the Rules.The Sudoku board could be partially filled, where empty cells is filled with the character ‘.‘ .A partially filled sudoku which is valid.To determine whether a given Sudoku is a valid Sudoku: Only consider the absence of duplicate numbers, the most intuitive solution is to judge each column, each row, each 3*
with option 82 from the L2 switch and establish binding entries for the information . Of course, if you encounter the switch does not support IP DHCP snooping information option allow-untrusted command can have the following two solutions:① using the IP DHCP relay information trusted(in-VLAN) command within an int VLAN of an unsupported switch② on the access layer switch to turn off the function of inserting option82 no ip DHCP snooping information
Original http://blog.chinaunix.net/uid-22547469-id-5091963.html
Category: LINUX
Need to clean up the idea of the solution.Background: Dragon Boat Festival, did not go home, the object to go to class, leaving me on the nest Room drive, in fact, can go out to stroll Park.Let's talk about the system environment: VirtualBox, Ubuntu15.04@64bitOpenWrt version: Chaos calmer 15.05-rc2Hardware board: MT7688,64MB DDR2,8MB SPI FLASH, a treasure LH7688The proble
Topic:Poker game Everyone should be more familiar with, a deck of cards composed of 54, including 3~a,2 each 4, Xiao Wang 1, King 1 Zhang. The board is small to large with the following characters and string representation (where the lowercase joker denotes Xiao Wang, capital Joker to represent the king):)3 4 5 6 7 8 9 ten J Q K A 2 joker JokerEnter two hands, be
file,To locate the file that causes the coreDump row.GDB [ExecFile] [core file]For example:GDB./Test. CoreAfter entering GDB,Run the BT command to view backtrace to check where the program is running,To locate the core dump file-> row.4. Use the core file for debugging ON THE DEVELOPMENT BOARD-----------------------------If the operating system of the Development Board is also Linux, the core debugging met
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