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The paper introduces the fault-tolerant technique of chuangxin-1 micro-satellite on-board computer. A fault injection test system is built to verify the fault-tolerant function. The test system is made up of monitor computer, Trace32 ICE, monitor instrument for output, and fault injection instrument. The test case is employed to verify the behavior of fault-tolerance and judge the validity of fault-tolerant...
Here introduces a monitor system technically based on ARM7 embedded micro processor (HMS30C7202) and Micro C/OS-II embedded operating system. The paper provides the scheme of the principal, introduces the connection method of outside signals, tells about how to transplant the Micro C/OS-II to the operating system, and shows the programming emphases and some source code of the majority of the program.
This paper presents a new embedded controller based on schedule feasibility self-testing, suitable for fast linear or nonlinear dynamic plants. The suggested solution provides concomitant multiple control laws working at different sampling frequencies. As protection to overloading conditions, an adaptive mechanism is introduced, meant to preserve the consistency of the control algorithms, whilst keeping...
Ambient computing is one of the more significant recent advances in computer-human interactions. With the ambient intelligence paradigm, computers become embedded in our natural surroundings. As they are context sensitive and adaptable, they better provide smart services to humans. But ambient computing requires communication between several heterogeneous components that are not supposed to communicate...
This paper has the purpose of introducing a new approach regarding the study of AVR microcontrollers, such as the ATmega64L, by using one of Digilent's development boards and peripheral modules which give the opportunity of implementing demo applications. It brings a plus of innovation by allowing students or hobbyists from every part of the world to consult and use the set of lab projects, which...
The number of electronic component units (ECU) involved in building a motor vehicle is increasing exponentially. Each ECU is a system embedded with software. Software are used in the ECUs of sub-systems of a motor vehicle such as integrated engine control, transmission control, adaptive cruise control, advance warning systems, crash avoidance, etc. It's no longer possible to study an ECU as a stand-alone...
In most real time multi-task systems, scheduling is handled by the operating systems. The overhead of task management is significant in such systems. And also, strict isolation of the real time tasks can hardly be provided. A hardware scheduler is proposed to address the above problems. Different from previous work, the proposed scheduler was embedded into the processor. A monitor-and-tuner unit was...
Testing of current devices in the automation domain cannot be done mathematically exhaustive due to the huge number of possible test cases and, even more important, the tremendous amount of time for the execution of all test cases.Thus, a dramatic reduction is needed in the testing domain.This paper discusses two possibilities for the reduction of test case execution time by reducing the number of...
This paper describes a static machine code analyzer which helps to eliminate the redundant bank switching instructions in partitioned memory architectures. Our approach rests on a state transition diagram representing the memory bank switching corresponding to each bank selection instruction. Redundant data memory bank selection instructions in the intraprocedural sequence, loops and interprocedural...
Rebreather diving systems have many advantages to standard open circuit system (or SCUBA). They offer higher gas efficiency together with silent and bubble free diving. Moreover instead of cold and dry gas found in open circuit systems the diver takes advantage of a warm and humid breathing gas. While most rebreathers require intensive training and high technical understanding, the Poseidon MK6 closed...
Embedded systems are characterized by the presence of a combination of dedicated processor and application specific software. With technological advances, although the number of transistors on a chip are increasing, the chip area is reducing thereby making power constraints a critical component of system design. In this paper, a scheme for efficient instruction level power profiling of an embedded...
The Base Band Processor and Switching System is one of the important Subsystem of GSAT-4 satellite. This paper discusses unique approach to handle multiple interrupts on system having constraint on limited external interrupts of micro-controller. The system also has to be optimized with limited resources available on board in terms of memory, power consumption and speed. This is an embedded system...
Embedded browser is widely utilized to display user interface in embedded systems. In the mechanism of embedded browser, a difficult problem is how to process and display the dynamic data in Web page flexibly. In order to resolve the problem, an effective iframe-based strategy for processing dynamic data in embedded browser is proposed and presented in this paper. Furthermore, a solution based on...
A mobile phone supporting a fixed-mobile convergence (FMC) network environment has attracted much interest from customers, because it enables users to access to both wired and wireless network with a single mobile phone. This paper presents loosely-coupled embedded system architecture for an FMC mobile handset. The main idea of the approach is to separate components execution for the mobile station...
Due to their reconfigurability and their high density of resources, SRAM-based FPGAs are more and more used in embedded systems. For some applications (Pay-TV,Banking, Telecommunication ...), a high level of security is needed. FPGAs are intrinsically sensitive to ionizing effects, such as light stimulation, and attackers can try to exploit faults injected in the downloaded configuration. Previous...
In this paper a BISR architecture for embedded memories is presented. The proposed scheme utilises a multiple bank cache-like memory for repairs. Statistical analysis is used for minimisation of the total resources required to achieve a very high fault coverage. Simulation results show that the proposed BISR scheme is characterised by high efficiency and low area overhead, even for high defect densities...
Attention in this paper is concentrated on the characteristics of 16-bit C166 family SCM system and the preemptive and real-time multitasking kernel - muC/OS-II. muC/OS-II is configured for C167-LM microprocessor and ported to establish embedded development platform. On this basis, the design of ultrasonic reversing alarm system(URAS) is applied to the platform. The URAS includes five task modules...
The conflicting requirements of real-time embedded systems, e.g. minimizing memory usage while still ensuring that all deadlines are met at run-time, require rigorous analysis of the system's resource consumption, starting at early design stages. In this paper, we glance through several representative frameworks that model and estimate resource usage of embedded systems, pointing out advantages and...
Embedded systems have been used in many different areas in which sensitive information communication and storage are needed. This makes security a serious concern in embedded system design, especially in operating system design. At the same time computer virus has been mutating and developing as fast as the upgrading speed of embedded operating system. Even it is possible for some intelligent virus...
This paper describes how we can use existing mobile technology to track the vehicle. Here the embedded system along with the mobile is used to prevent the vehicle from being stolen and also if the vehicle is stolen then its location can be tracked. Mobile technology is the fastest growing communication mode. In todaypsilas mobile technology we all are acquainted with short message service (SMS). In...
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