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Many techniques were proposed to improve the accuracy of floating point operations such as addition, multiplication, and dot product. The purpose of such technique is to reduce the effect of rounding error. This paper introduces an efficient hardware implementation for accurate dot product. The proposed implementation was configured as a custom instruction in the ALTERA NiosII soft processor core...
For the stream-like applications with high-bandwidth and low latency, optimizing the memory latency can effectively improve the QoS. In this paper, we propose a dedicated adaptive loop pre-fetch mechanism to reduce the memory latency and also improve the pre-fetch accuracy. In the mechanism, when a loop sequences is detected, the stream pre-fetch engine can adaptively initiate the pre-fetch operation...
The micro architectural design space of a new processor is too huge for architects to handle with cycle-accurate simulators. Previous researches attack this problem by statistical learning methods such as Artificial Neural Networks (ANN) and statistical sampling solutions such as SimPoint. These approaches greatly reduce the simulation time while keeping the results of CPI precisely. However, all...
To measure high-current, contacting with the wire directly is a certain danger. This article describes a pincer current transformer what the principle of electromagnetic induction be used in, using non-contact of the current measurement methods. In addition, the current strength meter site may not be the city's conditions. In this paper, CPU used in this design of instruments is made by the U.S. company...
Considering the disadvantages of conventional dynamic strain measurement system such as large outlines, inconvenient usage and liable to various interferences, A new dynamic strain measurement system is designed based on the modern embedded computer technology and strain measurement technology, which is the integration of signal conditioning, data acquiring and data issuing. This measurement system...
The coarse-grained reconfigurable image stream processor (CRISP) architecture is introduced for the image processing demands of high-definition (HD) cameras and camcorders. With several architectural concepts of the reconfigurable architecture, the CRISP architecture is proposed to meet the performance and flexibility requirements of the HD cameras. A multi-frame processing system with CRISP is implemented...
This paper introduces a generation method of Application-domain Specific Instruction-set Processors (ASIP) and shows an design example. ASIP is a processor which has some extended instructions specific to application domain. First, advantage of ASIC is explained. Then, some processor generation approaches explained, and an ASIP development environment called ASIP Meister is introduced. Finally, design...
This paper proposes a security paradigm named self-existent mechanism of access control. The most distinct character is that it runs absolutely independent from program executing environment, even without cooperation of OS. That is to say, it has a unique structure to assure that computing is controlled under a secure mechanism that cannot be penetrated by software like virus, Trojan and other malicious...
Contention for shared cache resources has been recognized as a major bottleneck for multicores--especially for mixed workloads of independent applications. While most modern processors implement instructions to manage caches, these instructions are largely unused due to a lack of understanding of how to best leverage them. This paper introduces a classification of applications into four cache usage...
Ultrasonic flow meter has been widely applied in the area of meteorology, petroleum, chemical engineering, medicine, water resources management and so on, owing to its advantages of high-accuracy, non-blocking measurement, easy installation and low cost. The A/D conversion circuit design is the core of the data acquisition system for high-accuracy ultrasonic flow meter. According to the data acquisition...
Extreme technology scaling in silicon devices drastically affects reliability, particularly because of runtime failures induced by transistor wearout. Current online testing mechanisms focus on testing all components in a microprocessor, including hardware that has not been exercised, and thus have high performance penalties. We propose a hybrid hardware/software online testing solution where components...
ADL is composed of architecture behavioral description and architecture structural description from two design views. According to Dajski's Y-Chart, ASIP description based on multi-level ADL proposed in the paper could meet the embedded systems design requirements to fill up the gap that exists between the specification level and the implementation level.
Multicore architectures have become ubiquitous in the recent years. Yet, traditional serial programming techniques cannot exploit their potential because they do not express the dependencies of the tasks clearly rendering them unsuitable for any system which can execute tasks in parallel. We present a methodology which enables designers to explicitly and separately express function, communication...
Personal high performance computer (PHPC) requires lower cost and high performance. The Teraflops PHPC systems with special accelerator units like GPGPU have been presented, but they have difficulties in programming, compatibility and applicability. In this paper, we present HPP-PHPC, a hybrid architecture of heterogeneous processors connected by non-coherent off-chip system bus. The performance of...
Dependability of many-core processors is a very important topic. To improve the dependability, we propose the Smart Core system, which is a smart many-core system with redundant cores and multifunction routers. The multifunction router has three functions: copying packets, changing the destinations of packets, and rendezvousing and comparing two packets from different nodes. Using these additional...
The advantage of circular correlation based on FFT is getting a large searching range, less time for processing and making the speed of acquisition much faster. The parameters such as the data points, segments and the ratio of sampling all effect the capability of the acquisition in the process of the circular correlation. The key parameters of the process based on FPGA can be designed and optimized...
This Paper discussed the principle of serial communication mainly, proposed the design method based on RS232, designed the hard circuit of serial communication, and realized the programming to PC Microcomputer and single chip microcomputer by using assembly language and C++ Builder separately.
Commercial off the shelf processors are becoming mandatory in space applications to satisfy the ever-growing demand for on-board computing power. As a result, architecture able to withstand the harshness of the space environment are needed to cope with the errors that may affect such processors, which are not specifically designed for being used in space. Beside design and implementation costs, validation...
In this paper, an USB host in the embedded system is designed and realized. Using LPC2387 microprocessor as main control chip, this system can send the data to an U flash disk by its on-chip USB controller. Depended on the ZLG/FS(Zhou LiGong's File System), the USB host-control driver, core driver and application program can be completed, and the files of U disk can be read and wrote by the USB host...
Grid intelligence measure-control is an emerging trend which regard sensor as self-governed networked node. This system required that the sensors have some function of grid and intelligent Intelligence. This paper shows how to use the embedded service technology, ARM9 microprocessor, embedded Linux,Intelligence agent and embedded service toolkit gSOAP implement intelligence and grid function of sensor...
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