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The paper presents a real-time operating system (RTOS) that provides a distributed shared memory (DSM) service for distributed embedded control systems. Model-based design is widely adopted in embedded control software design and the source code of software modules can be generated from a controller model. The generated software modules exchange th...
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Citations
... Some scholars' study proved that, with the rapid development of embedded microcontroller in computing power, storage capacity, integrated peripheral devices and other aspects, it had been widely used in various fields [13]. In addition, it was found that the embedded realtime control system was characterized by strong portability, certainty, tailorability, good stability, and had unique advantages in dealing with control systems with high real-time requirements and complex tasks [14]. It was also found that ARM core microprocessors could make embedded control system transplant well, and spare no effort to play its functions [15]. ...
The paper presents distributed shared memory (DSM) for embedded control systems with CAN (Controller Area Network), which is widely used in various control domains. DSM provides a location-transparent environment, in which distributed tasks exchange data through the DSM. There are a few DSM for distributed embedded control systems, which, however, do not provide efficient inter-node mutual exclusion. The paper presents DSM with prioritized mutual exclusion, which is efficiently implemented using the CAN arbitration mechanism. The DSM is based on a multiple reader/multiple writer model and supports entry consistency. The mutual exclusion also supports the multiprocessor priority ceiling protocol to avoid deadlocks and reduce the blocking duration. We have built the DSM in a RTOS, which is an extension to an OSEK OS. We have also evaluated the performance of the DMS and we think that the performance is acceptable for practical embedded control systems.
The paper presents a real-time operating system (RTOS) that supports distributed shared memory (DSM) for distributed embedded control systems. The RTOS provides a location-transparent environment, in which distributed software modules can exchange input and output values through the DSM. The RTOS is an extension to OSEK OS and it utilizes a real-time network called FlexRay. The consistency of the DSM is maintained according to the order of data transfer through FlexRay, not using inter-node synchronization. The worst case response time of the DSM is predictable if the FlexRay communication is well configured.
