Design And Implementation Of Heterogeneous Dual-core Power Distribution Networks Terminal System Using Processer LPC4357

By applying technique of sensors which helps on measure, technique of computer science to analyze data and make decision, technique of network communication on data transaction and technique of controlling engineering to response in time, smart distribution grid provides safe, affordable and environment-considerate electric power supply to customers with its intelligent distribution terminal to monitor and response to different situations and to improve the distribution grid performance. Following the promotion of strong smart grid project in China, it becomes stricter on the performance, consumption and stability of intelligent distribution terminal.In the meantime, multi-core technique becomes main stream among processor techniques. In order to satisfy various requirements, more and more embedded applications are developed based on multi-core technique for its benefit higher performance but lower power dissipation. Multi-core processor architecture can be homogeneous or heterogeneous. Heterogeneous Multi-core processor is more flexible in dedicated application which benefits from its architecture with multi-cores of different functions.This thesis takes about operation system structure enhancement which applies Asymmetric Multiprocessing to Free RTOS, an Embedded Real-Time Operating System, considering hardware features of heterogeneous dual-core processor LPC4357 based on the application requirement of intelligent distribution terminal. It tells how to design and implement a heterogeneous dual-core communication system sharing memory, based on which, it implements functions such as shared resource access, inter processor semaphore, device management and inter processor task schedule. Enhanced distribution grid terminal applications runs algorithm task on high performance core Cortex-M4 and has I/O data transaction with the general purpose core Cortex-M0 of processor LPC4357. As tested, this system can not only ensure the stability of distribution grid terminal but also improve performance.Above design has been applied into smart distribution grid terminal S60 MPU produced by GDE Electric Co, Ltd. It provides supports on multi-core system and application development for practical engineering.