3 examples of embedded system applications due to its own characteristics of embedded system once the industry market, will have a longer life cycle.
Embedded system in the application number is far more than the General computer. Embedded systems are widely used in communications, Internet, finance, aerospace, aviation, consumer electronics, military equipment, instrumentation, manufacturing control, it will apply as follows: industry application project finance, Commercial Bank ATM machines, self-service terminal, POS queries, and other communications, networking: firewall, VPN, VoIP, PBX, such as aerospace, aviation GPS: Aerospace controllers, rocket guidance, radar imaging, manned spacecraft simulation test consumer electronics: TV, VCRs, camera, security systems, video game consoles, PDA, ticket machines and other military equipment: military communication laptop, car gun controller, instrumentation, medical: signaling Analyzer, ECG measurements, color B Ultra, CT, manufacturing control system: big oil, coal, nuclear power plants, steel mills, port control and so 4 platform-based design of embedded systems-embedded intelligent platform [1] 4.1 embedded intelligence platform to produce in response to intense competition for embedded systems, accelerating the pace of market access to products, shorten product development cycles, some embedded system manufacturers and semiconductor chip manufacturers for embedded system applications and industry specific needs has introduced a variety of embedded intelligence platform (EIP). 4.2 EIP technology EIP (EmbeddedIntelligentPlatform, embedded intelligent platform) is a computer and information technologies development. General computer with a standard form of the computer, by configuring different application software to the same application in the re-launched and social aspects, its typical products to PC and embedded computer usually means some sort of industry standard single board computer, and that can adapt to a variety of work environments, the application can be embedded into more products. Therefore the embedded computer is has more variety, characteristics of products in small batches, industry into a higher threshold. At the same time as it is no longer with the computer's standard form, so some mainstream industrial control computer manufacturers prefer to define it as embedded intelligent platform (EmbeddedIntelligentPlatform), hereinafter referred to as EIP. The composition of the EIP 4.3 EIP General contains the processors, cache, FLASH, DRAM controller, DMA (direct memory access DirectMemoryAccess-) controller, PCI (PeripheralComponentInterconnect: external device interconnection) controller, etc., as well as a development system. Users use development system provides the programming of development tools, on the basis of the EIP to add specialized functionality or application-specific requirements for system optimization and performance assessment, developing embedded in products, installations or large system of embedded computer systems. The introduction of embedded intelligence platform reduces the general difficulty of development for embedded systems, development costs, shorten product development cycles. The processor is at the core of the EIP, common processor from single-processor or dual-processor. Based on packet network technology (such as VoIP-VoiceoverInternetProtocol and based on digital subscriber line of speech technology) network application of EIP, for example, the unitary structure of the processor is very difficult to meet these needs in complex network processing tasks while combined RISC (reduced instruction set) processor and is used to signal detection and noise elimination of digital signal processor (DSP) of mixed structure can meet these requirements. A typical VoIP system uses a RISC processor for network protocol processing, do one of the bits and bytes of actions to accomplish baotou and routing information to decode, data processing order and packaged, marked so that packets can correctly implemented sound playback. At the same time, the system also needs a DSP for echo cancellation and noise suppression and speaking party's tone detection. In the information package before the DSP performs silence detection and voice compression, and decode and decompress the reverse operation. Meet the diverse requirements of traditional programmes is a dual processor. RISC processor is used to connect digital network, used for protocol processing engine and Network Manager, but also to deal with the main system control and user interface; DSP and pulse modulation coding interface, used for speech compression and decompression functions. Although the above two-processor scenarios principle entirely feasible, but the most obvious disadvantage is that two processors increased costs, as each processor has its own memory and peripheral devices, each processor also requires its own design tool chain, as well as near-independent software development work. In addition, the two Exchange of data between the processor, you must use some common dual-port RAM (random access register) or FIFO (first in, first out) memory for two buffers between processors, or a complex software Handshake Protocol controls the exchange of data. Moreover, the programme for some small applications would be overkill. Network data rate determines the RISC processor capable of running and maintaining minimum clock speed, but in fact, the single-channel data processing most time RISC processor are in an idle state. In a large system, RISC processors can handle multiple channels of data flow, and each channel has its own DSP, in small-scale systems, redundant RISC processor performance is wasted, because it requires data processing also cannot make full use of DSP performance. So on some small application has a single processor scenario: in RISC processor DSP functionality on extended; also on extended RISC DSP functions; there are customized for the application (using ASIC technology), butThis approach is time-consuming, technical requirements, and expensive. In order to give the best performance to price ratio, at present, there is a scalable processor. The main advantage of scalable processor is to use the unified memory and single software development environment, than the traditional dual-processor design with lower costs. In addition, due to the internal implementation of custom, which allows the user to extend the application of specific directives, this kind of processor also can implement intellectual property protection. However, before you choose to adopt extensible processors, design engineers must be fully aware of the instructions to add what groups to take full advantage of the benefits of this structure. At present such processors including Tensilica's Xtensa and ARCInternational company ARCtangent. 4.4 EIP industry development and features · full of opportunities and challenges of embedded intelligence platform industry rapid development in recent years, according to the United States leadership in embedded computer manufacturers WinSystem in RTC Professional Magazine predicts that in the next 10 years embedded intelligence platform market will have 10 times the desktop computer market opportunities. IDC forecasts, the annual growth rate of embedded intelligence platform will amount to 15%, in 1998 the embedded intelligence platform market size is 126.5 billion in 2000, the market size is 250 billion in 2001 to 311 million. You can tell that there is a need to embed intelligence processing, computing applications are embedded intelligence platform market · technology continuously update., EIP EIP is today's global information industry's top, is the twenty-first century computer into life. Currently, there is no alternative to the more advanced technology and products, the industry's technology updates quickly, mainly with computer technology, VLSI technology, software, technology daily, extended application areas, new EIP products are continuously being developed and rapidly to market. · trade barriers to higher development EIP products need not only to master computer, communications and software, and other aspects of key technologies, have a wealth of product development, production management experience, but also to the product of the target industry knowledge to have profound understanding. These factors make as EIP market competitors, to experience long-term development and production of the gradual accumulation of management practice, rich experience in industrial applications, in order to form a competitive advantage. Therefore the industry with high barriers to entry. · selected key components that still need to be dependent on imports for China's EIP manufacturers. At present, China's EIP in the manufacture of some key components such as microprocessors and VLSI, etc. will still be dependent on the United States, Japan and other manufacturers supply. This kind of spare part market supply and demand and price fluctuations are a direct result of the EIP industry. As China joins WTO, IC imported duty-free will help reduce product costs. · China EIP industry embedded intelligence platform is the current national focal point support information industry. In recent years, the State Department and relevant ministries have enacted some of the industry in promoting the EIP has important policy documents, including: the information industry "tenth five-year plan" outline ", the current state to encourage the development of industry, product and technology catalog", "encourages software and IC industry development policy", "computer and network product" ten, five "special program" and "instrument industry" ten to five "plan", etc. At the same time, the State will use high-tech and advanced technology to transform traditional industries, including electronic information technology applied to traditional industries, improve the production process is automated, the intelligent control and management information level; to the application of advanced manufacturing technology, promote the manufacturing of high quality and high production areas, the revitalization of the equipment manufacturing industry; upgrading key industries of key technologies, common technology and related skills, technology and equipment level. These are to promote the development of industry and market EIP positive.
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