用C语言实现捷联惯导系统的输入输出功能

捷联惯性导航系统（ＳＩＮＳ）是由惯性测量元件和导航计算机构成的多功能自主式导航系统，为满足这种一般单任务计算机的环境要求，本文介绍了利用Ｃ语言可对计算机硬件和内存直接进行操作的特点，实现导航计算机的输入输出功能。首先讨论了用Ｃ语言直接编码的思想步骤，然后介绍了有关接口软件的实现原理，主要包括通讯接口芯片的编程，中断控制器编程，中断服务程序的安装以及中断信号的处理等，实际应用结果表明：Ｃ语言是设计和

Realizing Input/Output Functions of SINS in C Language

he Strapdown Inertial Navigation System (SINS) is a self-contained multi-functional navigation system which is composed of an inertial measuring unit and a navigation computer. To meet the requirements of the case for this single-task special purpose computer, this paper presents how to use C language to realize the I/O functions of the SINS computer by utilizing the advantage that the C language can directly operate the hardware and memory of the computer.First,the paper discusses the approach and the procedure of using C language to program directly. Secondly,the paper introduces the principles on which the interface routines realize their functions, including the programming of communication interface processors and interrupt controllers, the loading of interrupt responding programs and the dealing with interruppt signals. The results of actual usage show that C language is an excellent language to program and adjust the SINS software. It provides a great deal convenience for programming, adjusting, linking, loading and executing of the navigation software.