在过去的十年中,嵌入式系统的开发发生了很大的变化。以前嵌入式设备往往是一个孤立的、资源有限的系统,它们追求的是在有限的价格上满足一定的功能性要求。通常它们采用那些功能并不强大的 CPU,这也是开发者不得不尽可能地压缩嵌入式系统性能的原因。而今天人们对嵌入式设备在智能化和互连性上提出了要求, In the past decade, the development of embedded systems has undergone great changes. In the past, embedded devices were often isolated systems with limited resources. They sought to meet certain functional requirements at a limited price. Usually they use CPUs that are not powerful enough, which is why developers have to compress embedded system performance as much as possible. Today, people have put forward requirements for the intelligence and interconnection of embedded devices.