说明：  avr论坛上傻孩子写得一本关于avr的书，是我见过的很好的嵌入式书籍的书之一，嵌入式相关设计的原理，如协议等都写得非常好。
(avr forum written a silly children' s book on the avr, I' ve seen a good book embedded books, one of the principle of embedded design, such as written agreements are very good.)