Three Common Architectures in Embedded Software Development You Should Know

Embedded software development is a widely used and continuously evolving technology field. To meet the needs of different application scenarios, developers can adopt various architectural approaches.

In this article, we will explore three common architectures in embedded software development: Front and Back Sequential Execution Method, Time-Slicing Method, and Operating System.

The Front and Back Sequential Execution Method, also known as the single-task execution method, is one of the simplest and most common embedded software architectures.

In this architecture, the system executes tasks sequentially according to the order of the program code. All tasks are executed in a loop, with only one task executed at a time, while the others are suspended. This architecture is suitable for simple applications such as sensor data collection, controllers, etc.

However, the Front and Back Sequential Execution Method has certain limitations.

Firstly, it cannot fully utilize processor resources as only one task is executed at a time while others remain suspended. Secondly, tasks cannot flexibly share resources, leading to resource waste and inefficiency. In some scenarios with high real-time requirements, this architecture cannot meet the demands.

The Time-Slicing Method is a multitasking execution method that allocates a certain time slice for each task, allowing all tasks to alternate execution at regular time intervals.

The time slice for task execution is fixed, and when a task’s time slice is exhausted, the system switches to the next task. This method allows multiple tasks to run in parallel, improving system resource utilization and efficiency.

The Time-Slicing Method is suitable for moderately complex embedded systems and can meet high real-time requirements. It requires reasonable setting of task priorities and time slice sizes to ensure that important tasks are executed first and that each task can be completed within an appropriate timeframe.

The Operating System is a more complex and powerful embedded software architecture. It can manage and coordinate the execution of multiple tasks and provide a range of system services, such as task scheduling, memory management, device drivers, and communication mechanisms. The operating system offers developers a higher level of abstraction, making software development more flexible and efficient.

Under the operating system architecture, each task has its own priority and state, and the operating system determines which task to execute first through task scheduling algorithms. Tasks can share resources, and access control for shared resources is implemented through mutual exclusion mechanisms to ensure system stability and security.

The operating system is suitable for complex applications with strict real-time requirements, such as smartphones and industrial automation control systems. It provides greater flexibility and scalability, allowing developers to more easily implement complex functions and algorithms.

In summary, the three common architectures in embedded software development are Front and Back Sequential Execution Method, Time-Slicing Method, and Operating System.

The choice of architecture depends on factors such as the complexity of the application, real-time requirements, and resource constraints. Developers need to flexibly choose the appropriate architecture based on specific situations and design and optimize accordingly to ensure the stability, reliability, and efficiency of embedded systems.

Finally, Hua Mei has specially prepared course benefits

Previous Recommendations

Monthly salary of 25K! Will Li Jiaqi make me reflect?

Next “Windfall”? Employment Guide for the Smart Hardware Industry!

Hangzhou understands “romance” best in the “digital age”~