Programming Arduino Projects with the PIC Microcontroller: A Line-by-Line Code Analysis and Complete Reference Guide for Embedded Programming in C

Appendix: Additional Insights

In this appendix, I will analyze some of the more common aspects of C programming and how they apply to PIC microcontrollers. I will also cover some useful concepts that will help in the understanding how microcontrollers work, such as operators, number systems, and keywords.

Data Types and Memory

To help understand the different data types used in C, it would be helpful to appreciate their relationship to the micro’s memory. PIC micros have three areas of memory:

• Program Memory Area

• Data RAM

• Data EEPROM

The Program Memory Area

This is where all the instructions of your programs are stored. With the PIC18f4525, the program memory area has 48kbytes of memory, even though it uses a 21-bit address bus which can address up to ...