国嵌讲解的嵌入式Linux驱动部分，如果没基础，建议看完1至4再看这个，要是有基础直接看这个编写驱动就够了-States containing an embedded Linux-driven part of the explanation, if not basic, it is recommended reading 1 to 4 look at this, and if there is a direct look at the preparation of basic drive is