i3 microprocessor

too bloated, as long as the methods in the interface appear, no matter whether they are useful to the classes dependent on it, these methods must be implemented in the implementation class, which is obviously not a good design. If you change this design to conform to the interface isolation principle, you must split interface I. Here we split the original interface I into three interfaces. The design 2 after the split is shown as follows: (Figure 2 Design following the interface isolation pri

([50,250, 50,200]);Grid on; % display grid linesAxis on; % display Coordinate System 8. Gradient Operator Edge DetectionUse MATLAB to implement the following:I =imread('xian.bmp ');Subplot (2, 3, 1 );Imshow (I );Title ('original image ');Axis ([50,250, 50,200]);Grid on; % display grid linesAxis on; % display Coordinate SystemI1 = im2bw (I );Subplot (2, 3 );Imshow (I1 );Title ('binary image ');Axis ([50,250, 50,200]);Grid on; % display grid linesAxis on; % display Coordinate SystemI2 = edge (I1,

1.var value1 = 0, value2 = 0, value3 = 0;for (var i = 1; I var i2 = i;(function () {var i3 = i;SetTimeout (function () {Value1 + = i;value2 + = I2;Value3 + = i3;}, 1);})();}SetTimeout (function () {Console.log (value1, value2, value3);}, 100);Find results and whyYou can think of settimeout as a constant push into the code in an extra controller.For inside the closures are all aware that closures are immedia

About a face question on the net,Output Results: /** * * @author Dreamsea 2011-11-19 */ Public class integertest { Public static void main (string[] args) { Objpooltest (); } Public static void objpooltest () { Integer I1 = +; Integer i2 = +; Integer i3 = 0; Integer i4 = new integer (+); Integer i5 = new integer (+); Integer I6 = new integer (0); System.out.println ("i1=i2\

modification of the PHP source file. We can ask APC not to check if the PHP source files for opcodes are updated by setting Apc.stat to 0. This allows for optimal performance and we recommend it. However, the downside of this is that once a PHP source file has been updated, it is necessary to restart the httpd daemon or call the Apc_cache_clear () function to empty the APC cache to ensure that the PHP source file is consistent with the opcodes of the cache in memory space.Include (ROOTP. ' i1.p

Original: http://www.jb51.net/article/111847.htmWhat is auto-boxing and unpackingAutomatic boxing is that Java automatically converts the original type values into corresponding objects, such as converting an int variable to an integer object, a process called boxing, which translates an integer object into an int type value, which is called unpacking. Because the boxes and unboxing here are automatically non-human for conversion, it is called as automatic packing and unpacking. Primitive type B

The detailed thinking about the instruction execution cycle @ (Composition principle) (taken from 2012.44) five-segment assembly line: Reference (IF), decode/Read register (ID), execute/Calculate valid address (EX), Access memory (M), result writeback register (WB). The pipeline is launched sequentially and is completed in sequence. Data forwarding is not used, and read and write operations of the same register cannot be performed within the same clock cycle. Look at only one aspect of the pr

the expected results. Under the same conditions (temperature, voltage, and other external factors are ignored) the time spent on sending and receiving is shown in table 2. Taking the transmission of 4 KB data as an example, table 2 shows that sending and receiving saves 0.547 076 S and 0.042 832 s respectively when using FIFO. Assume that the 1-bit data is transmitted in θ s and the data volume is n. In this case, we can see that the time difference between the use of FIFO and the use of FIFO

Hardware: Microprocessor (MPU, up ):A device composed of a computer's processor and a controller integrated into a chip is called a microprocessor, also known as a central processing unit (CPU, central processing uint). a cpu is the brain of a computer system, various logical and arithmetic operations, program execution, and generation of various control signals are implemented. Other components in the comp

Song Baohua talks about the basic concepts of arm's embedded Linux porting experience 1. IntroductionArm is short for Advanced RISC Machines (a processor of advanced and streamlined command systems). It is a microprocessor intellectual property (IP) Core provided by arm.Arm has been applied in various product markets, including industrial control, consumer electronic products, communication systems, network systems, and wireless systems. ARM-based

requirements will not change, otherwise, at least reserve enough spare Rom space for possible changes.In most cases, we can try to write some program code in the Rom to observe the space occupied by the Code. For a microprocessor system with an internal ROM, system programs can only occupy limited program memory space. D. Experience: Rom is similar to RAM usage, and the program code length is related to the selected development language. For example,

discuss the functional features shared by all PC architectures, without introducing the technical details of specific bus types. The data path between the CPU and the I/O device is usually called the I/O bus. The 80x86 microprocessor uses a 16-bit address bus to address I/O devices, and uses an 8-bit, 16-bit, or 32-Bit Data Bus to transmit data. Each I/O device is connected to the I/O bus sequentially. This connection uses a hardware organization lev

backend design and chip manufacturing processes are high. As a result, CMP becomes the "future" high-performance processor structure that is first applied to commercial CPUs. Although the increasing integration of multi-nuclear power brings many benefits, the chip performance is multiplied, but it is obvious that some of the original system-level problems are introduced into the processor. 1-core structure: homogeneous or heterogeneous The components of CMP are divided into two categories: homo

2. Four laws that are still valid IT practitioners know the famous Moore's Law and Bell's law. These two laws complement each other, the former determines that the speed of the microprocessor will double every 18 months, while the latter believes that if the computing power remains unchanged, the price and size of the microprocessor will be halved every 18 months, this means that at the same price, the spee

-based data tables. The hard part of the RoM space capacity required for prediction is the length of the prediction program code. The solution to this problem can only improve the prediction accuracy with the gradual accumulation of experience.However, the most important thing is not to accurately calculate the code length of a program, but to clearly estimate the upper limit of the code length. According to experience, if 80% of the RoM space is occupied by code, it will be too crowded unless i

sliceTransfer Scheduling Method. But all UC/OS-II function calls and the execution time of the service are known, that is, the execution time of the uC/OS-II system service does not depend on the number of application tasks. AnotherIn addition, each task in uC/OS-II has its own stack, the size of each stack can be allocated according to the needs of the application, which lowers the system's demand for RAM; in terms of interrupt management, uCAn interruption in the/OS-II can suspend ongoing tas

1. What is an interface? The interface is the connection component between the microprocessor CPU and the external world. It is a transfer station for information exchange between the CPU and the external world. 2. Why do I need to set interfaces between the CPU and peripherals? There are four main reasons for setting interfaces between the CPU and peripherals: (1) signal incompatibility between the CPU and peripherals, including Function Definition,

Hardware Design of Four-channel Ultrasonic Flaw Detection card [Date:] Source: Electronic Technology Application Author: Meng Linggang, Song guangde [Font:Large Medium Small] 　 The overall structure of a four-channel Ultrasonic Flaw Detection cardFigure 1 shows the overall structure of the Four-channel Ultrasonic Flaw Detection card. It can be seen from the diagram that it is mainly composed of ultrasonic emission circuit, channel selection, amplification and filtering, data

memory to handle a variety of hardware. In addition, the software upgrade is more modular. You can upgrade the application and load the driver on flash during system running. The configuration information and running time parameters can be stored as data files in flash. 3 Implementation Scheme of embedded Industrial Control Network The Industrial Control System Based on Embedded linux runs the embedded Linux operating system with the embedded microprocessor