A Scheduling Algorithm with RTiK+ for MIL-STD-1553B Based on Windows for Real-Time Operation System

Abstract

In devices using Windows operating system based on x86 system, the real-time performance is not guaranteed by Windows. It is because Windows is not a real-time operating system. Users who develop applications in such a Windows environment generally use commercial solutions such as the RTX or the INtime to provide real-time performance to the system. However, when using functions and API for simple real-time processing, an issue of high development cost occurs in terms of cost-effectiveness. In this paper, the RTiK+ was implemented in the type of a device driver by controlling the MSR_FSB_FREQ register to generate a timer interrupt independent of Windows in the Windows 8 and providing a real-time functionality to the user mode by re-setting the local APIC count register. And the operating frequency of the CPU is changed to minimize power consumption for battery life in a mobile device such as a Tablet PC. In particular, the weapon system uses highly reliable MIL-STD-1553B communication and performs BC and RT functions of MIL-STD-1553B to transmit and/or receive data in communication between component and component. It is significantly importance to guarantee integrity of data without loss data during communication. For this purpose, it isproposed to implant the Scheduling algorithm with the RTiK+ for MIL-STD-1553B communication for Windows 8 to support a real-time processing in the Windows operating system on the embedded system, and to use the periods of 2ms (max), 5ms and 10ms provided by the RTiK+ for real-time processing when performing the BC and RT functions of MIL-STD-1553B communication. In this paper, the method of the scheduling algorithm with RTiK+ for MIL-STD-1553B to provide real-time processing is proposed for the Windows based on x86 system.