Software Architectures in Embedded Systems
Like embedded hardware , embedded software architecture is highly flexible. Simple embedded software (such as electronic toys, calculators, and so on) may be only a few thousand lines of code and perform simple input and output functions. On the other hand, complex embedded systems (such as smart phones, robots, and so on) need more complex software architecture, similar to desktop computers and servers. Complex embedded systems provide more powerful functions, need more convenient interfaces for users, and require the support of more powerful hardware. With the improvement of hardware integration and processing capabilities, the hardware bottleneck has gradually loosened and even broken, so embedded system software now tends to be fully functional and diversified. An embedded software system is composed of four layers, from bottom to top: Hardware abstraction layer Operating system layer System service layer Application laye...