Technical requirements

You can find the code files for this chapter on GitHub at https://github.com/PacktPublishing/Embedded-Systems-Architecture-Second-Edition/tree/main/Chapter6.

Bitwise operations

The examples associated with this chapter make extensive use of bitwise operations for checking, setting, and clearing single bits within larger registers (in most cases, 32-bit long). You should already be familiar with bitwise logic operations in C.

The operations commonly used in the examples are the following:

• Setting the Nth bit in the register R via the assignment R |= (1 << N): The new value of the register R will contain the result of the bitwise OR operation between its original value and a bitmask containing all zeros, except the bit corresponding to the value we want to set, which is set to the value one
• Clearing (resetting) the Nth bit in the register R via the assignment R &= ~(1 << N): The new value of the register is the result of a bitwise...