Intermediate C Programming for the PIC Microcontroller

Delve into the exciting world of embedded programming with PIC microcontrollers in C. The key to learning how to program is to understand how the code works – and that is what you’ll learn here.

Following C Programming for the PIC Microcontroller, this book continues exploring the coding required to control the PIC microcontroller and can be used as a standalone single reference, or paired with the previous title to enhance your programming skills. You'll see how to control the position of a servo motor and use the compare aspect of the CCP module to create a square wave with varying frequency. You'll also work with the capture aspect of the CCP to determine the frequency of a signal inputted to the PIC and use external and internal interrupts.

This book breaks down the programs with line-by-line analysis to give you a deep understanding of the code. After reading it you’ll be able to use all three aspects of the Capture, Compare and PWM module; work with different types of interrupts; create useful projects with the 7 segment display; and use the LCD and push button keyboard.

WHAT YOU’LL LEARN

* Create a small musical keyboard with the PIC


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Manage a stepper motor with the PIC* Use the main features of the MPLABX IDE


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Interface the PIC to the real world*
Design and create useful programs based around the PIC18F4525


WHO THIS BOOK IS FOR

Engineering students and hobbyist who want to try their hand at embedded programming the PIC micros.

Hubert Ward has nearly 25 years of experience as a college lecturer delivering the BTEC, and now Pearson's, Higher National Certificate and Higher Diploma in Electrical & Electronic Engineering. Hubert has a 2.1 Honours Bachelor's Degree in Electrical & Electronic Engineering. Hubert has also worked as a consultant in embedded programming. His work has established his expertise in the assembler and C programming languages, within the MPLABX IDE from Microchip, as well as designing electronic circuits, and PCBs, using ECAD software. Hubert was also the UK technical expert in Mechatronics for three years, training the UK team and taking them to enter in the Skills Olympics in Seoul 2001, resulting in one of the best outcomes to date for the UK in Mechatronics.

Introduction

 The Aims and Objectives of the Book

 The Objectives of the Book

 The Prerequisites

Chapter 1: Creating a Header File

 Header Files

 Creating a Header File

 Creating a Project in MPLABX

 Including the Header File

 Create the Project Source File

 Analysis of Listing 1.1

 SynopsisChapter 2: Controlling a Seven Segment Display

 The Seven Segment Display

 Common Anode LED

 Common Cathode

 The Program

 The Algorithm The Flowchart

 The Listing for the Seven Segment Display

 Improving the Seven Segment Display Program

 The Issue with the Program

 Arrays

 Using Pointers

 Analysis

 The Improved Program

 Exercise 2.1

 Synopsis

Chapter 3: The 24 Hour Clock

 The Seven Segment Display

 The Algorithm

 The Initialization of the PIC.

 Analysis of Listing 3.1

 A 24 Hr Clock with the LCD Display

 Analysis of the Header File for the LCD

 The Analysis of Listing 3.2 Improvements for the 24Hr Clock LCD Program

 Using Switch and Case Key Words

 Analysis of the New Subroutine

Chapter 4: Creating a Square Wave

 Why Create a Square Wave?

 Musical Notes

 Exercise 4.1

 The Speed of the Simple DC Motor

 PWM Pulse Width Modulation

 Creating a Square Wave

 Creating a 500Hz Square Wave

 The Mark Time or Duty Cycle

 Creating Two Square Wave Outputs

 Setting the Speed of a DC Motor

 Driving the Motor

 Creating a Three speed DC Motor Program

 Varying the Space Width

 Using A Variable Input Voltage to Control the Speed of a DC Motor

 Creating a Musical Note

 Creating the Middle C Note

 Create a Musical Keyboard

 The Analysis of Listing 4.6

 Summary of Chapter 4Chapter 5: Making Music

 Creating a Musical Note

 Creating the Middle C Note

Chapter 6: The Stepper Motor

 The Servo Motor

 Controlling the Positions of the Servo Motor with a Variable ResistorChapter 7 :Interrupts

 The Fetch and Execute Cycle

 The Program Counter PC

 The Sources of Interrupts

 Setting the Interrupts

 The Algorithm for the Interrupt Test Program The Analysis of the Listing 7.1.