1 what cries embedded embedded the system is it is a center in order to apply, it is a foundation with computer technology, and soft hardware can cut out, those who apply to applied system to have firm demand to function, dependability, cost, bulk, power comsumption only maneuver calculates engine system. It is general by embedded equipment of hardware of microprocessor, periphery, embedded the 4 parts composition such as the applied process of operating system and user, use at realizing the function such as the control of pair of other equipment, surveillance or management. Embedded the system points to the system that be not PC commonly, it includes hardware and software two parts. Hardware includes processor ／ controller of microprocessor, memory and peripheral parts of an apparatus and port of O of I ／ , graph. Software part includes operating system software (OS) (ask real time and much task are operated) with applied process process designing. Design personnel to combine these two kinds of software together sometimes. Applied programme controll is worn of the system run and behavior; And the interact that the operating system is controlling applied process process designing and hardware. Embedded systematic core is embedded microprocessor. Embedded microprocessor has commonly the following 4 characteristics: 1) much to real time task has very strong support capacity, can finish much job and have shorter interrupt answer time, make the executive time of in-house code and heart of real time kernel reduces lowermost limit thereby. 2) have the memery block with very strong function to protect a function. As a result of,this is embedded software structure of the system is modular already, and appear to avoid to be between software module wrong alternate action, need designs powerful memery block to protect a function, also be helpful for software diagnosing at the same time. 3) the processor structure that can expand, what satisfy highest function of application showpiece with leaving quickly is embedded microprocessor. 4) embedded microprocessor must power comsumption is very low, use at especially portable wireless what batteries power supply leans in reaching mobile computation and communication equipment is embedded the system is more such, if need power comsumption,have MW only even μ W class. Embedded all of computer science department is the same as general-purpose photograph of all of computer science department compares have the following characteristic: 1. Embedded the system is normally those who face specific applying is embedded CPU and general-purpose the biggest differ even if embedded great much work is in CPU for specific user group in the system of the design, it has low power comsumption, volume normally small, compositive spend advanced characteristic, can a lot of finishs by board card jobs in general CPU compositive in chip interior, be helpful for thereby embedded systematic design tends miniaturization, mobile ability increases greatly, the coupling that follows a network is more and more close together also. 2.
Embedded the system is the child after will advanced computer technology, semiconductor technology and electronic technology and the specific application photograph of each industries are united in wedlock. This decided it is a technology necessarily concentrated, capital concentrated, height is dispersive, ceaseless the knowledge of innovation is compositive system. 3.
Embedded systematic hardware and software must efficient ground design, act according to actual circumstances, purify is redundant, strive to achieve higher performance on same silicon chip area, such ability are right in specific applying the choice of processor has competition ability more. 4.
Embedded system and specific application organic ground is united in wedlock together, its upgrade replacement also is with particular product synchronism undertakes, because this is embedded once systematic product enters the market, have longer lifecycle. 5.
Carry out speed and systematic dependability to rise, embedded the software in the system is general solidify is in memory chip or sheet piece in machine itself, is not in putting lay aside to wait for carrier at disk. 6.
Embedded systematic itself is not had cite development ability oneself, after finishing, the user cannot have modification to among them program function normally, must tool of a development and environmental ability undertake developing. CNC Milling
CNC Machining