How to read codes in a new project.

Please get familiar with the software, trying to be able to DEBUG it.
Break it down to several pieces, even the printf is your best friend!

There are more harder issues, like multiple threading or timing issues, you
could find more tips from you co-workers.

First thing of first, hands on. Reading will not help that much (except some
DANIUs).


big picture first, 先弄懂大的逻辑， 比如要实现一个什么功能, 然后再去扣细节，
前面很多人都提到过， 学会debug，总之就是要make your hands dirty， 看是看不
会的。 不要怕麻烦人家，不止mentor一个人可以问嘛。 当然问之前一定要多想一下。