Register Access in C++

摘要

Embedded programmers traditionally use C as their language of choice. And why not? It's lean and efficient, and lets you get as close to the metal as you want. Of course C++, used properly, provides the same level of efficiency as the best C code. Moreover, you can also leverage powerful C++ features to write cleaner, safer, more elegant low-level code. In this article, I present a C++ scheme for accessing hardware registers in an optimal way. Most embedded code needs to service hardware directly. This seemingly magical act is not that hard. Some kinds of registers need a little more fiddling to get at than others, but you certainly don't need an eye-of-newt or any voodoo dances.