嵌入式系统和通常的硬件开发区别在哪里啊？

pxjdream

我是做图像处理的，以前实验室将算法做到DSP里面，自己设计板子，布线，选择元器件，烧代码到DSP里面。感觉和用单片机做一块板子的过程一样。
那么嵌入式系统和这些开发的区别在哪里呢？大侠指点一下，我还没入门的说.....

Dragonfly

almost the same hehe.

but now many embedded system like io controller, pda, can use powerful cpu and then need an OS to handle this. at least the boards i meet are all like this.