Design And Realization Of CS-AIS System Based On UML

CS-AIS is a Class B AIS using carrier-sense TDMA (CS-TDMA) technology, which is installed in the ship. CS-AIS is one of the important assistant equipments on ship as the tool beneficial for shipping. With the rapid development of the shipping field, problems also appear, shipping accidents often happen in the dense port, for example. Under such circumstance, CS-AIS development helps to solve the problem. A Class ships usually have good safe because they enough assistant equipments, but the other ships are on the contrary, for example yachts. The price is one of key factors in the situation. CS-AIS development may change the situation on this paper.This paper first introduces the basic principles and methods of embedded UML, and how to use ROPES which is a Rapid Object-Oriented Process. Then from the aspect of schedulable task of the embedded system, this paper introduces a several common scheduling algorithm, analyzing the schedulable of the system using scheduling algorithm.After studying and researching deeply the embedded UML, synthesizing the new requirement of AIS, it analyzes and designs a new multitask AIS system. Then this paper analyzes schedulability of the task, shows the limitation of traditional scheduling algorithm, a hierarchal scheduling algorithm of real-time tasks is provided to analyze the scheduabiltity of the system.Finally, it usesμC/OS-Ⅱwhich is real-time multitask OS and ARM withμC/OS-Ⅱto realize the whole system.