Army Individual Tent,Second Hand Army Tents,Army Issued Tent,Military Bivy Tent Bestway Industries (Group) Co., Limited , https://www.military-tents.com
With the continuous progress and development of the society, the original consumption and management models of various schools have been unable to adapt to the new development requirements. Based on the current status, the “Campus Card System†has emerged. The so-called "one-card" is used in schools. Cards are used wherever there is cash, a ticket address or where identification is required. This kind of management model replaces the traditional consumer management model and provides an efficient, convenient, and secure management model for school management.
2, embedded systems <br> <br> Introduction With the development of computer technology, embedded systems have become an important part of the field of computers to embedded system ARM architecture mechanical design of high performance, low power consumption And low cost features make it widely used in the field of embedded system design. With the gradual maturity and continuous development of ARM technology, the performance of ARM processors has been continuously improved. Some of the performances have reached or approached the level of low-end PCs. At the same time, various operating systems have also increased support for ARM cores. This makes it possible to use ARM to replace PCs to accomplish certain tasks. This will reduce the footprint of the equipment and reduce equipment and development costs. Because of these performance advantages, microprocessor-based microprocessor technology applications account for more than 75% of the market share of 32-bit RISC microprocessors. ARM technology JF gradually penetrates into every aspect of life.
3, the application of embedded technology
Until now, the application of embedded technology represented by ARM microprocessor technology has penetrated into various fields.
(1) Industrial Control: As a 32-bit RISC architecture, the ARM-based microcontroller chip not only occupies most of the market for high-end microcontrollers, but also gradually expands to low-end microcontroller applications.
(2) Wireless communication: At present, more than 85% of wireless communication devices use ARM technology. With its high performance and low cost, ARM has become increasingly consolidated in this field.
(3) Network Application: With the promotion of broadband technology, ADSI chips using ARM technology are gradually gaining competitive advantage. In addition, ARM has been optimized for audio and video processing and received extensive support. It also poses a challenge to 1) the application of SP.
(4) Consumer electronics products: ARM technology is widely used in the current popular digital audio players, digital set-top boxes and games.
4, the characteristics of ARM microprocessors
ARM microprocessors with R-SC architecture generally have the following characteristics:
(1) Small size, low power consumption, low cost, and high performance.
(2) Thumb (16-bit)/ARM (32-bit) dual instruction set is supported, which is well compatible with 8-bit/16-bit devices.
(3) Streamlined instruction sets, instruction execution faster.
(4) The addressing method is flexible and simple, with high execution efficiency.
(5) With embedded CERT logic, program debugging and development are convenient.
5, system application features
The network structure of the card system is particularly suitable for the construction of large-scale Ic card consumption systems, especially for the integrated management of multi-consumer sites (such as multiple canteens). With a variety of different modes of consumer POS machines, it can meet the management needs of different consumer sites. It can be used to build internal settlement systems such as cafeterias, dormitory entrances, and libraries, and to realize credit card clearing for shopping, catering and entertainment consumption, and to realize electronic currency. Campus card system.
6. Technical comparison with existing mainstream systems
(1) System reliability and stability comparison The device adopts ARM microprocessor technology widely used in the world, and there are many large international semiconductor manufacturers' technical support, as well as many stable and reliable third-party software support, all to make the system development. , commissioning and production have been greatly protected, so that the development of the system will have a higher stability and reliability at the beginning.
(2) Comparison of system processing capabilities The system adopts 32-bit ARM microprocessor technology, and the system processing capability is 8 times higher than that of the single-chip microcomputer system. It also provides abundant memory interfaces, including SRAM, SDRAM, FLASH, NANDFLASH, etc. The memory capacity of the system 2GB is realized, so the card storage capacity and data storage capacity are very large, and the system response time is also very fast.
(3) Comparison of communication speed and real-time performance The system equipment provides a standard Ethernet interface. The communication speed is as high as 10OM. Any point of the system can enjoy all resources of the entire system in real time. Its real-time performance is much higher than other networking methods, and data transmission, exchange, and sharing And remote access is extremely easy and convenient, in the remote management center can be completed in real time to issue cards, authorization, return card and report loss and other operations.
(4) Comparison of networking methods Each point in the system has an independent IP address, which can be directly connected to the existing Fast Ethernet networking. The construction period is short and the networking is easy. The local bus system (~tlRS-485 system) generally needs rewiring, needs a bus network, and is regional, requiring the bus wiring distance is generally within 600 ~ l000m. There is no networking in non-networked systems.
(5) System scalability comparison Through the Ethernet networking technology, the central controller can be connected locally or remotely through the LAN and WAN for remote control. And at the same time, it can implement multi-site sub-authority control. The location of the management center can be changed at any time and it is easy to implement network control or remote control. The system adopts a mature TCP/IP communication protocol, so when the consumption point is increased, it simply adds devices and allocates independent lP addresses to the devices.
7. Conclusion
By introducing the advantages and application features of ARM technology, and through comparison with the current mainstream one-card consumer systems, the card-based consumer system based on ARM technology is based on its powerful and reliable ARM microprocessor core, and is equally powerful, stable, and diverse. The network presses FI, and it has been far away from the technology E in the same products on the market. Moreover, under the joint efforts of many international semiconductors, the application of ARM microprocessors has been widely recognized, and the price of the products It is also reduced to the same level as 8-bit/16-bit microprocessors, which also greatly reduces the cost of the card-based consumer system based on the ARM technology, making it easier for consumers to enter the market and be more competitive.
Research on Card System Based on Embedded Technology
1 Introduction