scholarly journals Embedded Operating System for MicroBlaze

10.14311/856 ◽  
2006 ◽  
Vol 46 (4) ◽  
Author(s):  
M. Šimek
Keyword(s):  
Operating System ◽  
Embedded Systems ◽  
Operating Systems ◽  
Development Time ◽  
Embedded Operating System ◽  
Processor Core ◽  
Ongoing Effort ◽  
Embedded Operating Systems ◽  
Further Development ◽  
Current Experience

This paper presents a work in progress on experiments with embedded operating systems for the MicroBlaze processor. Modern embedded systems based on a configurable platform incorporating a similar processor core are gaining importance with the ongoing effort to minimize cost and development time. After an overview of the configurable platform based on this processor core, we devote our attention to uClinux OS. This OS has been successfully ported for the MicroBlaze processor, and we present our current experience with it. At the end of the paper we discuss several possible booting strategies and recommend further development of U-BOOT. 

scholarly journals Semi-automated process of adaptation of platform dependent parts of embedded operating systems

2017 ◽  
Vol 68 (2) ◽  
pp. 87-98
Author(s):  
Martin Vojtko ◽  
Tibor Krajčovič
Keyword(s):  
Operating System ◽  
Operating Systems ◽  
Automatic Generation ◽  
Adaptation Process ◽  
Formal Description ◽  
Minimal Requirement ◽  
Complicated Process ◽  
Automated Process ◽  
Embedded Operating Systems ◽  
The Impact

Abstract Each year manufacturers develop new processors. As a reaction to this continuous development, the developers of software have to adapt their software to those new processors. As a minimal requirement, the code of an operating system has to be changed to enable the execution of other user applications. This change is a complicated process during which incompatible parts of an operating system have to be redesigned and missing parts have to be implemented. Complications arise when there is a need to adapt an operating system to completely different processor architecture. In this paper we present a novel adaptation process that has preconditions to reduce the impact of these complications. This process uses a file for the formal description of a processor, which is also described in this paper. The formal description could act as a standard for processor manufacturers and could allow the generation of a platform dependent code of an operating system. This paper presents concepts, definitions and ideas of the adaptation process and shows possible solutions for an automatic generation of code parts of an operating system.

The Design and Implement of the Video Monitoring System Based on WinCE

2012 ◽  
Vol 178-181 ◽  
pp. 2747-2751
Author(s):  
Yuan Hui Yu ◽  
Yong Mei Li ◽  
Ying Deng
Keyword(s):  
Operating System ◽  
Mobile Computing ◽  
Monitoring System ◽  
Handheld Computers ◽  
Video Monitoring ◽  
Embedded Operating System ◽  
Processor Core ◽  
Video Information ◽  
Computing Platform ◽  
Remote Server

WinCE is the foundation of Microsoft embedded, mobile computing platform, it is an open, can be upgraded 32-bit embedded operating system, and it is an electronic equipment operating system based on handheld computers. This paper designed a kind of video monitoring system based on WinCE embedded operating system and ARM9 processor core. The system can collect video information by camera, and then transmit the getting information to the remote server to monitor, the experiment result shows that the system has a good stability and real-time.

Embedded Virtualization Techniques for Automotive Infotainment Applications

2014 ◽  
pp. 372-387
Author(s):  
Massimo Violante ◽  
Gianpaolo Macario ◽  
Salvatore Campagna
Keyword(s):  
Operating System ◽  
Embedded Systems ◽  
Experimental Evidence ◽  
Real Time ◽  
Operating Systems ◽  
Resource Usage ◽  
Single Chip ◽  
Real Time Operating System ◽  
Multicore Computing ◽  
Computing Platforms

Automotive infotainment applications are examples of embedded systems in which a heterogeneous software stack is used, which most likely comprises a real-time operating system, an automotive-grade Linux, and possibly Android. Thanks to the availability of modern systems-on-a-chip providing multicore computing platforms, architects have the possibility of integrating the entire software stack in a single chip. Embedded virtualization appears an interesting technology to achieve this goal, while providing the different operating systems the capability of exchanging data as well as optimizing resource usage. Although very well known in server-class systems, virtualization is rather new to the embedded domain; in order to leverage its benefits, it is therefore mandatory to understand its peculiarities and shortcomings. In this chapter, the authors illustrate the virtualization technologies with particular emphasis on hypervisors and Linux Containers. Moreover, they illustrate how those technologies can cooperate to fulfill the requirements on automotive infotainment applications. Finally, the authors report some experimental evidence of the performance overheads introduced when using embedded virtualization.

Configuration of Non-Functional Properties in Embedded Operating Systems

2011 ◽  
pp. 84-103
Author(s):  
Wanja Hofer ◽  
Julio Sincero ◽  
Wolfgang Schröder-Preikschat ◽  
Daniel Lohmann
Keyword(s):  
Operating System ◽  
Functional Properties ◽  
Operating Systems ◽  
Product Line ◽  
Target System ◽  
Special Importance ◽  
Product Lines ◽  
Memory Footprint ◽  
Embedded Operating Systems ◽  
Reliability Performance

In embedded operating systems (OSes), non-functional properties like reliability, performance, or memory footprint are of special importance. State-of-the-art OS product lines focus on the configurability of functional characteristics of the system. This chapter proposes an approach that aims at also making non-functional properties indirectly configurable and maintainable by the system configurator. In order to reach this goal, the CiAO OS product line used here has configurable architectural properties, which have no functional influence on the target system, but instead bear an impact on its non-functional properties. Additionally, the chapter develops a feedback approach that gains information about the non-functional properties of an already configured system to assist further configuration decisions, and presents and details the CiAO approach and evaluates it using two case studies from the CiAO operating system.

scholarly journals Timing Comparison of the Real-Time Operating Systems for Small Microcontrollers

Symmetry ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 592 ◽  
Author(s):  
Ioan Ungurean
Keyword(s):  
Embedded Systems ◽  
Embedded System ◽  
Real Time ◽  
Operating Systems ◽  
Experimental Tests ◽  
Wide Range ◽  
Time Requirements ◽  
Basic Services ◽  
The Embedded System ◽  
Embedded Operating Systems

In automatic systems used in the control and monitoring of industrial processes, fieldbuses with specific real-time requirements are used. Often, the sensors are connected to these fieldbuses through embedded systems, which also have real-time features specific to the industrial environment in which it operates. The embedded operating systems are very important in the design and development of embedded systems. A distinct class of these operating systems is real-time operating systems (RTOSs) that can be used to develop embedded systems, which have hard and/or soft real-time requirements on small microcontrollers (MCUs). RTOSs offer the basic support for developing embedded systems with applicability in a wide range of fields such as data acquisition, internet of things, data compression, pattern recognition, diversity, similarity, symmetry, and so on. The RTOSs provide basic services for multitasking applications with deterministic behavior on MCUs. The services provided by the RTOSs are task management and inter-task synchronization and communication. The selection of the RTOS is very important in the development of the embedded system with real-time requirements and it must be based on the latency in the handling of the critical operations triggered by internal or external events, predictability/determinism in the execution of the RTOS primitives, license costs, and memory footprint. In this paper, we measured and compared the timing performance for synchronization throughout an event, semaphore, and mailbox for the following RTOSs: FreeRTOS 9.0.0, FreeRTOS 10.2.0, rt-thread, Keil RTX, uC/OS-II, and uC/OS-III. For the experimental tests, we developed test applications for two MCUs: ARM Cortex™-M4 and ARM Cortex™-M0+ based MCUs.

Research on Protection Methods of Embedded Operating System Software Based on Hardware Compiler

2013 ◽  
Vol 443 ◽  
pp. 556-560
Author(s):  
Gao Ming He
Keyword(s):  
Operating System ◽  
Practical Significance ◽  
Embedded Operating System ◽  
System Software ◽  
Software Protection ◽  
Performance Loss ◽  
Cycle Simulation ◽  
Protection Technology ◽  
Program Flow ◽  
High Level

This paper describes a system; CODESSEAL can provide protection and evaluation to system software. CODESSEAL was designed to protect embedded systems with sufficient expertise and resources to capture attack equipment and manipulator, not only to protect software but also to protect hardware. By using the reconfigurable hardware allows CODESSEAL to provide confidentiality, integrity of security services and a platform-independent program flow without having to redesign the processor. System uses software and data protection technology and designs cycle simulation methods for data analysis. Experimental results show that the protected instructions and data with a high level of safety can be realized a low, which in most cases the performance loss can be reduced to below 10%, so the research of software protection methods of the embedded operating system of hardware compiler has important practical significance.

scholarly journals An Adaptive Scheduler for Real-Time Operating Systems to Extend WSN Nodes Lifetime

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Roberto Rodriguez-Zurrunero ◽  
Ramiro Utrilla ◽  
Elena Romero ◽  
Alvaro Araujo
Keyword(s):  
Operating System ◽  
Real Time ◽  
Operating Systems ◽  
Research Area ◽  
Rechargeable Batteries ◽  
Wireless Sensor ◽  
Portable Devices ◽  
Wireless Devices ◽  
Changing Environments ◽  
Tasks Scheduling

Wireless Sensor Networks (WSNs) are a growing research area as a large of number portable devices are being developed. This fact makes operating systems (OS) useful to homogenize the development of these devices, to reduce design times, and to provide tools for developing complex applications. This work presents an operating system scheduler for resource-constraint wireless devices, which adapts the tasks scheduling in changing environments. The proposed adaptive scheduler allows dynamically delaying the execution of low priority tasks while maintaining real-time capabilities on high priority ones. Therefore, the scheduler is useful in nodes with rechargeable batteries, as it reduces its energy consumption when battery level is low, by delaying the least critical tasks. The adaptive scheduler has been implemented and tested in real nodes, and the results show that the nodes lifetime could be increased up to 70% in some scenarios at the expense of increasing latency of low priority tasks.

scholarly journals The Design of a 2D Graphics Accelerator for Embedded Systems

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 469
Author(s):  
Hyun Woo Oh ◽  
Ji Kwang Kim ◽  
Gwan Beom Hwang ◽  
Seung Eun Lee
Keyword(s):  
Embedded Systems ◽  
Embedded System ◽  
Real Time ◽  
Line Drawing ◽  
Cmos Process ◽  
Embedded Processor ◽  
Processor Core ◽  
Field Programmable ◽  
The Embedded System ◽  
Graphics Processing

Recently, advances in technology have enabled embedded systems to be adopted for a variety of applications. Some of these applications require real-time 2D graphics processing running on limited design specifications such as low power consumption and a small area. In order to satisfy such conditions, including a specific 2D graphics accelerator in the embedded system is an effective method. This method reduces the workload of the processor in the embedded system by exploiting the accelerator. The accelerator assists the system to perform 2D graphics processing in real-time. Therefore, a variety of applications that require 2D graphics processing can be implemented with an embedded processor. In this paper, we present a 2D graphics accelerator for tiny embedded systems. The accelerator includes an optimized line-drawing operation based on Bresenham’s algorithm. The optimized operation enables the accelerator to deal with various kinds of 2D graphics processing and to perform the line-drawing instead of the system processor. Moreover, the accelerator also distributes the workload of the processor core by removing the need for the core to access the frame buffer memory. We measure the performance of the accelerator by implementing the processor, including the accelerator, on a field-programmable gate array (FPGA), and ascertaining the possibility of realization by synthesizing using the 180 nm CMOS process.

scholarly journals Development of a Colorimetric Sensor for Autonomous, Networked, Real-Time Application

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5857
Author(s):  
Brandy J. Johnson ◽  
Anthony P. Malanoski ◽  
Jeffrey S. Erickson
Keyword(s):  
Real Time ◽  
Field Trials ◽  
Wireless Sensor ◽  
Broad Area ◽  
Ongoing Effort ◽  
Environmental Air ◽  
Further Development ◽  
Real Time Application ◽  
Selection Of ◽  
Event Occurrence

This review describes an ongoing effort intended to develop wireless sensor networks for real-time monitoring of airborne targets across a broad area. The goal is to apply the spectrophotometric characteristics of porphyrins and metalloporphyrins in a colorimetric array for detection and discrimination of changes in the chemical composition of environmental air samples. The work includes hardware, software, and firmware design as well as development of algorithms for identification of event occurrence and discrimination of targets. Here, we describe the prototype devices and algorithms related to this effort as well as work directed at selection of indicator arrays for use with the system. Finally, we review the field trials completed with the prototype devices and discuss the outlook for further development.

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