Efficient Real-Time Executive for ARM-Based Microcontroller

Real-time computer systems are significant today, because they govern a broad range of applications, from simple laboratory testing to complex flight control systems. In real-time computing systems, the system's correctness is achieved not only by the logical conclusion, but also by the time at which deadlines are met. This paper introduces a real-time executive (RTX) that implements the essential requirements of real-time operating system including a leak-free memory management, priority-based scheduling ensuring efficient utilization of CPU time while maintaining priority for critical tasks, inter-process communication allowing cooperative processing, serial communication with the user allowing for user interaction and monitoring of the system.The RTX is implemented on two ARM-based microcontrollers (STM32F303RE and STM32F401 RE). The significance of this RTX is that it provides a practical infrastructure and utilizes the capabilities of ARM architecture, considering that ARM processors are widely used in everyday embedded systems.The efficacy of the RTX is verified via experimental work. The RTX is exposed to various stress tests to observe the impact on meeting deadlines in real-time.