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Based embedded systems driven Things Reform

In Electronic Infomation Category: B | on April 14,2011

In order to meet the post-PC era

personnel training requirements, more and MIC2544-2BMM datasheet and more embedded system of setting up relevant courses. To different industry background and MIC2544-2BMM price and application context, many colleagues in universities and MIC2544-2BMM suppliers and practice how to improve aspects such as experimental design, made many useful teaching ideas and experimental teaching methods. Moreover, with the development of information technology, embedded system, many aspects of the teaching process, still needs further exploration and improvement. Especially in recent years, the rapid development of Internet of Things technology, to the embedded system application and development of a more extensive space, but also for the teaching and practice of embedded system content into the new blood. However, things in new opportunities for embedded systems, but also brought new challenges. Teaching in embedded systems - in particular, experimental teaching process - how to deal with this challenge, to improve the experimental content and teaching methods, personnel training to adapt to the requirements of the times, it is worth our serious consideration. In conclusion, the author of embedded teaching experience, based on the current Internet of Things technology for the development and application-oriented things in the embedded system course system, teaching the theory, experimental teaching, the second part of the classroom and graduation design made preliminary exploration, in order to initiate.

1 things and embedded systems course system

Things (Internet of things, IOT) concept is proposed in 1999, according to the 2005 International Telecommunication Union (ITU) definition [4], mainly to solve the matter of things to the objects (Thing to Thing, T2T) , people to things (Human to Thing, H2T), person to person (Human to Human, H2H) the interconnection between. The high degree of cross-frontier emerging concern in the international arena, the United States, IBM made based on the Internet of Things "wisdom of the Earth" concept; Chinese Academy of Sciences as early as the beginning of the birth of the concept of things started the sensor network research, 2009, Things Industry Research Institute was established in Wuxi, *** investigation raised "Feel China" concept.

Although things from a technical point of view has no precise definition, but the generally accepted view is that it combines the four key technologies: sensor technology, embedded systems technology, modern networking and wireless communication technology, distributed information processing technology [56]. Thus, embedded systems in the Internet of Things technology plays a vital role. Moreover, the embedded system and have things both complementary relationship: Embedded system technology for the development of things to provide the necessary technical support, engineering applications for things to improve the industrial scale of things; and the development of Internet of Things technology development for embedded systems provides a new application areas for embedded system application provides a wider space, embedded systems technology certainly helps to achieve new leaps and bounds.

Embedded system course itself as a new curriculum system, has been more and more attention from scholars. However, the rapid development of Internet of Things technology background, embedded systems curriculum should be adjusted to suit the times. Shown in Figure 1, the course system includes not only the sensor, microcontroller, etc. Some basic courses, but also includes the practice of embedded system development aspect, that is, things for the development and application of embedded systems. Due to space limitations, the figure only software applications and hardware applications distributed computing gateway design as an example of things.


Figure 1 for the embedded system of things Course

2 theory teaching

Theoretical teaching embedded system mainly focus on ARM embedded microprocessor, embedded operating systems and embedded systems applications and cutting-edge development; teaching purpose is familiar with the design, master embedded system development technology. Theory of teaching generally not less than 12 hours, more than half of the total class hours. I usually control about 16 hours, course contents include:

Embedded System Overview;

ARM embedded microprocessor cores;

embedded real time operating system and its transfer;

cross-development environment for embedded systems;

things and embedded systems.

3 things of embedded systems for experimental

3.1 hierarchical experimental design

Theory test Practice teaching provides the necessary knowledge base, and experimental and practical aspects of the theoretical basis in the same time consolidating and further improving the practical ability to develop the creative potential [7]. I used ZLGs MagicARM2210S embedded test development platform, in addition to containing a variety of mainstream extraoral serial interface and GPIO, also contains the Ethernet interface, GPS (Global Positioning System) module interface, CAN bus interface. Things to these interfaces and the application background, the author designed a three-level experiments to meet the different stages of experimental and practical needs, such as listed in Table 1. Deep and experimental levels, different levels corresponding to different experimental pilot projects, but also different forms of organization. The main purpose of the basic experiment is familiar with the method. The comprehensive test is experimental and innovative application of more things is based, is to improve capacity. Three levels of experiments step by step, gradually increase, for the further development and graduation practice has laid a good foundation.

Table 1 for experimental things embedded hierarchical design


3.2 Practice of things the project

Practice through projects to improve practical ability to exercise and the importance is beyond doubt [78]. In 2009, our school start "of things in the forest environment monitoring and protection of" project, the author is responsible for the middle layer of things embedded gateway design, the main function modules shown in Figure 2. GPS module interfaces were collected from the terminals latitude, longitude information, and wireless data transceiver module of the sensor to collect the terminal to send the temperature, soil moisture, sunlight and other environmental information. The terminal information through the ARM processor packaged into UDP packets sent through the Ethernet network interface to the base station server.


Figure 2, the gateway hardware block diagram of Things

Through second class, there is spare capacity histology students set up interest groups, will things be divided into several sub-topics gateway, by various interest groups, simulation project in the form of practice development. For example, "GPS data acquisition and processing" sub-project, first transplant C / OS operating system, and then transplanted LwIP network protocol stack, and then to multi-task in the form of interface to read data from the GPS module and packaged into a UDP packet, sending to the network. Among these, members of interest groups need a reasonable division of labor, learning by cooperation. After the author and the interest groups together for nearly a year, the embedded gateway successfully Things Purple terminal arranged in the sensor data transmitted to the base station network server. Things of environmental monitoring information of a terminal shown in Figure 3.


Figure 3 Things terminal data

Projects through the practice patterns of things, expanding the learning content, and apply their knowledge to further enhance interest in learning cultivate the spirit of cooperation, but also played a "point to an area" effect, effectively expanding the knowledge and practical ability.

In addition, part of the graduation project, I designed each year for 3 to 4 things embedded system design issues. After two practice has proved that students choose the subject of such a broader range of knowledge, wider employment opportunities.

Conclusion ARM Embedded System

author and experimental practice of the teaching process, based on the background of the rapid development of things, streamline the theory of teaching content and broaden their knowledge, to highlight the actual engineering projects - especially of things - closely related to the design content. Hierarchical design experiment, the content development of the times followed, and in practice session for students to directly participate in cutting-edge topics and projects. Truly: the theory of solid foundation in order to streamline in order to stimulate interest in the forefront of knowledge in order to improve efficiency levels of the practice to gain skills and practical projects.

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