Author: halherta

This article covers Read Modify Write (RMW) operations. These operations allow the programmer to manipulate one or more bits of interest within a variable (or register), without affecting the state of the rest of the bits in the that variable (or register). In order to understand RMW operations, the reader must have a solid foundation…

The topic of bit manipulation in C doesn’t seem to get as much attention in many C programming books and study guides. Perhaps because it’s a not used regularly by application developers and system programmers. Knowledge of bit manipulation is however downright critical in the fields of embedded systems, kernel space programming and device drivers…