Predictable CPU Architecture Designed for Small Real-Time Application - Concept and Theory of Operation

Gaitan, Nicoleta Cristina; Zagan, Ionel; Găitan, Vasile Gheorghiţă

doi:10.14569/ijacsa.2015.060406

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…The disadvantage of the proposed algorithm for implementing the StartTaskServerMBECycle task is that it relatively has many lines of pseudocode and it transfers the actual tasks of reading/writing data, executing Modbus messages and configuration to the StartTaskServerMBEProtocol task. Thus, the algorithm can be improved to allow a better evaluation of the message processing time relative to the total execution time of the microcontroller [ 38 ].…”

Section: Proposed Modbus Extension Server Implementationmentioning

confidence: 99%

Modbus Extension Server Implementation for BIoT-Enabled Smart Switch Embedded System Device

Găitan,

Zagan

2024

Sensors

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The industrial control and automation sector has invested in the development and standardization of new wireless (WirelessHART, ISA 100.11a, and WIA-PA) and wired (Profibus/Profinet, Modbus, and LonWORK) solutions aimed at automating processes to support standard monitoring and control functions from the perspective of addressing critical applications, as well as those integrated within the Building Internet of Things (BIoT) concept. Distributed data acquisition and control systems allow modern installations to monitor and control devices remotely. Various network protocols have been proposed to specify communication formats between a client/gateway and server devices, with Modbus being an example that has been widely implemented in the latest industrial electrical installations. The main contribution made in this paper concerns the completion of the Modbus Extension (ModbusE) specifications for the server station in the classical Modbus communication architecture, as well as their implementation and testing in an STM32F4 kit. A general-purpose control architecture is proposed for BIoT sector, comprising both intelligent touch switches and communication protocols of which the Modbus protocol is used extensively for the monitoring and control part, especially between clients, smart switches, and devices. The specific contributions concern the presentation of a scientific and practical implementation of improved specifications and their integration as software modules on ModbusE protocol server stations. A client station with a VirtualComm USB PC connection is also implemented in the lab to test the operation of the proposed server with specific Modbus applications.

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Section: Proposed Modbus Extension Server Implementationmentioning

confidence: 99%

Modbus Extension Server Implementation for BIoT-Enabled Smart Switch Embedded System Device

Găitan,

Zagan

2024

Sensors

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“…We remind that all sCPUi share the same functional units, such as ALU, the control unit, the condition unit, the unit for hazard detection, and the redirection of data unit, so that the data path must guarantee the hardware isolation and the consistency of sCPUi contexts [16]. At a 33MHz frequency, the scheduler answer to an time related event may be around 30.401ns (one clock cycle).…”

Section: Fig 2 the Registers Of The Nhse Hardware Integrated Schedulermentioning

confidence: 99%

An Approach of nMPRA Architecture using Hardware Implemented Support for Event Prioritization and Treating

Zagan¹,

Gaitan²,

Găitan³

2017

ijacsa

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Abstract-One of the fundamental requirements of real time operating systems is the determinism of executing critical tasks and treating multiple periodic or aperiodic events. The present paper presents the hardware support of the nMPRA processor (Multi Pipeline Register Architecture) dedicated to treating time events, interrupt events and events associated with synchronization and inter-task communication mechanisms. Because in real time systems the treatment of events is a very important aspect, this paper describes both the mechanism implemented in hardware for prioritizing and treating multiple events, and the experimental results obtained using Virtex-7 FPGA circuit. The article's element of originality is the very short response time required in treating and prioritizing events.

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“…The nMPRA-MT architecture presented in [27] is a finegrained multithreaded processor based on the original nMPRA concept, designed to support architectural requirements for hard real-time systems.…”

Section: B Proposed Nmpra-mt Architecturementioning

confidence: 99%

Improving the Performance of CPU Architectures by Reducing the Operating System Overhead (Extended Version)

Zagan

Găitan

2016

Electrical, Control and Communication Engineering

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-The predictable CPU architectures that run hard real-time tasks must be executed with isolation in order to provide a timing-analyzable execution for real-time systems. The major problems for real-time operating systems are determined by an excessive jitter, introduced mainly through task switching. This can alter deadline requirements, and, consequently, the predictability of hard real-time tasks. New requirements also arise for a real-time operating system used in mixed-criticality systems, when the executions of hard real-time applications require timing predictability. The present article discusses several solutions to improve the performance of CPU architectures and eventually overcome the Operating Systems overhead inconveniences. This paper focuses on the innovative CPU implementation named nMPRA-MT, designed for small real-time applications. This implementation uses the replication and remapping techniques for the program counter, general purpose registers and pipeline registers, enabling multiple threads to share a single pipeline assembly line. In order to increase predictability, the proposed architecture partially removes the hazard situation at the expense of larger execution latency per one instruction.

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Predictable CPU Architecture Designed for Small Real-Time Application - Concept and Theory of Operation

Cited by 6 publications

References 11 publications

Modbus Extension Server Implementation for BIoT-Enabled Smart Switch Embedded System Device

Modbus Extension Server Implementation for BIoT-Enabled Smart Switch Embedded System Device

An Approach of nMPRA Architecture using Hardware Implemented Support for Event Prioritization and Treating

Improving the Performance of CPU Architectures by Reducing the Operating System Overhead (Extended Version)

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