sda architects

1. Judgment of the start-end signal --------------------------------------------- //start,stop condition judgement //--------------------- ------------------------Wire start, stop; Reg SDA1, sda2; Reg SDA11; Always @ (Posedge SCL) //Trigger 1 sda1 The idea of judgment: when the normal data signal is transmitted on SDA, the normal data signal level hold time is an integer multiple of the SCL period, which means that the

structure. 2. Information viewpoint. 3. compute the viewpoint. 4. engineering viewpoint. 5. technical point of view. Each view has specific modeling objectives and system stakeholders. The layered subsystem view provides a highly abstract view of all subsystems. 14.2 System Conception 14.2.1 definition of System Conception The system concept is a common protocol between developers and users. According to this protocol, developers need to complete the requirements of system users within a specif

This series is a 坑 series, will say some in the system design, system architecture 坑 , these are I think of where, there is like this is the same as the macro 坑 , the following article will have to specific technical details (such as a function, a system call) 坑 , in short, there are pits everywhere, Some of these pits are what I have experienced, some are heard, you can also leave a message to say that you met 坑 .In this article, we 重构 take a look at this hole in the design of the system archit

an impact on the functions of a product. However, it is important to remember that testing an architect is a role rather than a position. Although a senior Test Engineer may be promoted to a test architect, not all of them will become test architects. Generally, some departments set up the role of a test architect for commercial or strategic needs. However, sometimes you can see that a senior Test Engineer plays the role of a test architect, but does

Add by Zhj: Although it was a few years ago, it is a valuable reference.Original: http://blog.zhaojie.me/2010/05/programmer-magazine-2010-5-architect.htmlLast month, the programmer magazine Manuscripts me, hoping I could take part in the May "architect Solitaire" column, and I hesitated a little bit and agreed. "Architect Solitaire" is a question-and-answer form, with one person asking each question and answering by another. The answer is the next issue of the questioner. The architect of this q

service-level requirements in the SOA Architecture In addition to the business needs of the system, the architecture designer must ensure that the constructed system architecture can meet the non-functional service-level requirements and QoS requirements of the system) requirements. In the initial and refined phases of the project, architects should, together with all systems involved (stakeholders), define relevant measurement standards for each ser

The soul of Software architecture systemOne, The Software Architect is the master designer of the system. Two, the architect's job responsibilities is in a software project development process, the customer needs Convert to a normative development plan and text, and develop the overall architecture of the project , directing the entire development team to complete the program. Software architects play an important role throughout the software develo

flexibility. However, it is a daunting task to have a new way of implementing the architecture in order to be strong and flexible. Enterprise architects must become "service-oriented architects", not only to understand SOA, but also to understand SOA practices. The distinction between architectural practices and the resulting architectural results is subtle and critical. This article discusses the practice

Fdsik can partition the disk into several zones, but also can specify partitions for each partition of the file system, such as Linux, FAT32, Linux, Linux swap, FAT16 and in fact, Unix-like operating system of the file system, etc., of course, when we use Fdisk partition disk operations , is not an end point, we also need to format the partition of the required file system, such a partition to use; This is similar to Fdisk in DOS.Fdisk-l viewing hard disk and partition informationThe total numbe

two lines: clock signal (SCL) and data signal (SDA). the I2C bus is used for communication between the host and slave, that is, master and slave .) [Symptom]Stability Test: A New i2ctest module is added to uboot, which keeps writing and reading I2C slave (CPLD, determine whether the communication is successful by checking whether the written data is consistent with the read data. The test data increases from 0 to 255 (the I2C communication data widt

see two devices one is/dev/hda and the other is/DEV/SDA; The command format for FDISK operating the hard disk is as follows: [Root@localhost beinan]# fdisk device For example, we learn about/dev/hda or/DEV/SDA equipment through fdisk-l, and if we want to add or remove some partitions, we can use [Root@localhost beinan]# Fdisk/dev/hda Or [Root@localhost beinan]# FDISK/DEV/

Fdisk on the hard disk and partition operation, into FDISK on the hard disk operation stage we can partition the hard disk operation, if you make fdisk-l understand; through fdisk-l, we can find out the number of drives and device names in the machine, for example above, we will see two devices one is /dev/hda, the other is/DEV/SDA; the command format for Fdisk to operate the hard disk is as follows: [[[emailprotected] beinan]# fdisk device such as we

everyone. 1.2 I2C The I2C bus is a two-wire serial bus developed by Philips, which is a clock line (SCL) and bi-directional data cable (SDA). Because the I2C bus requires only two lines, less space is used on the circuit board, and the problem is that the bandwidth is narrower. I2C in standard mode, the highest transmission rate 100kb/s, in the fast mode of up to 400kb/s. belongs to half duplex. In embedded systems, I2C is widely used, and most micro