Design Of Composite Electronic System Based On Smart-OSEK OS

Compared with the traditional satellites,the Pico-satellite has the advantages of high in-tegration,short development cycle and low cost,and has been one of the important fields of aerospace technology research.The composite electronic system(CES)is the nerve center of the Pico-satellite,and the development efficiency of the CES can effectively shorten the re-search cycle of the Pico-satellite and can improve the development efficiency.Recently,the task of the satellite satellites is becoming more and more complicated,and the challenge of the development efficiency of CES software is becoming more and more difficult.The develop-ment of CES needs to solve the real-time synchronization problem that must be faced with the complicated multitasking in realizing the actual task while avoiding to increase the complexity of the system and reduce the maintainability.The embedded operating system is introduced into the development of CES of the picom satellite,which reduces the coupling degree between the system software and the hardware platform,improves the reusability of the software,and the powerful task scheduling system provided by the embedded operating system provides Multi-task real-time synchronization problem a convenient and reliable solution.Based on the above requirements,this paper presents a design of integrated electronic system architecture based on Smart-OSEK OS,which aims at solving the contradiction be-tween improving the reliability and shortening the development cycle.For the follow-up model,System development to facilitate.The main results of this paper are as follows:Firstly,based on the analysis of the advantages and disadvantages of the former CES main task cycle,the paper presents the design of the main task cycle based on the design of the alarm module,and the flexibility of the operating system scheduling based on the requirements of the API and the integrated electronic master task provided by the Smart-OSEK OS.The advantages and disadvantages of the main task cycle based on the front and back systems are discussed.Secondly,the problem of priority reversal caused by the sharing of resources is discussed.Fi-nally,by considering the application of the Pico-satellite service and the Smart-OSEK OS ar-chitecture,it provides an optimized design that either facilitates development or facilitates sys-tem operation.Secondly,In this paper,based on the requirement of the practical application of the CES of Pico-satellite,a function interface based on high precision clock source and RTC chip is proposed to provide high-precision time information on the satellite,and it propose solutions for problems may encounter when the two clock sources synchronizing.At the same time,this paper also provides a high-reliability synchronous automatic acquisition system based on FPGA and DSP designed to meet the needs of the synchronous acquisition of multiple sensors in the satellite.Experiments show that the system has good performance while ensuring that the on-board task is not affected While the synchronization accuracy of up to 10 us.In summary,this paper presents a highly reusable,maintainable,functional interface,per-fect based on the operating system design of high reliability integrated electronic system archi-tecture.To solve a number of previous generation integrated electronic systems due to lack of flexible scheduling and difficult to solve the problem.It is of great significance to shorten the development period and improve the development efficiency of the software.