Slide 1: Accessing the Real World

Bit handling functions

We need to learn a few bit handling functions before being able to prepare the data for the DAC:
| : bitwise or
& : bitwise and
data += 5 <=> data = data + 5
data |= 5 <=> data = data | 5
~data: invert all bits in data
data >> 4 all bits in data are shifted right by 4
data << 4 all bits in data are shifted left by 4

Writing data to a DAC

Imagine a 12 bit digital to analogue converter with the following register outline: