Developing in C on the AVR ATmega328P

Introduction

While the Arduino IDE and software framework is outstanding for quickly developing a working prototype, it does so with a combination of the C++ language and Arduino-only objects. This can become an issue if you are at a college or university which expects standards-based C language proficiency. This set of entries for designed for learning how develop embedded ANSI C programs for the AVR family and specifically the ATmega328P (Arduino Uno).

Pages of Significant Interest

• Writings - always shows latest entries, very important to review for new content!
• Developing in C on the AVR ATmega328P: Frequently Asked Questions (FAQ) Like all FAQ’s, if you have a question, check here first.
• Developing in C on the AVR ATmega328P: Frequently Found Errors (FFE) Similar to an FAQ, describes errors found while creating code, best place to check when you have an error you do not understand.
• Developing in C for the ATmega328P: Example Code Example code for all of the functions, if you have a problem with a function, review the example!

Course Material

Developing in C for the ATmega328P

Beginning tutorial using Labs_10C_Class content to help someone replace the Arduino C++ software framework with a Standard C approach.

1. Developing in C for the ATmega328P: Notes
2. Developing in C for the ATmega328P: Getting Started
3. Developing in C for the ATmega328P: Setup Introduction
   1. Developing in C for the ATmega328P: Linux Setup
   2. Developing in C for the ATmega328P: macOS Setup
   3. Developing in C for the ATmega328P: Windows/WSL Setup
   4. Developing in C for the ATmega328P: Windows 10 Setup
4. Developing in C for the ATmega328P: Using git
5. Developing in C for the ATmega328P: Edit
6. Developing in C for the ATmega328P: Build
7. Developing in C for the ATmega328P: Upload
8. Developing in C for the ATmega328P: AVR_C Library Functions
9. Developing in C for the ATmega328P: Using a Serial Monitor
10. Developing in C for the ATmega328P: Functions - Serial input/output
11. Developing in C for the ATmega328P: Function - analogWrite()
12. Developing in C for the ATmega328P: Functions - Serial input/output
13. Developing in C for the ATmega328P: Function - digitalWrite()
14. Developing in C for the ATmega328P: Function - pinMode()
15. Developing in C for the ATmega328P: Function - digitalRead()
16. Developing in C for the ATmega328P: Struct - buttons[]
17. Developing in C for the ATmega328P: Function - analogRead()
18. Developing in C for the ATmega328P: Hints
19. Developing in C for the ATmega328P: Mapping Values
20. Developing in C for the ATmega328P: Using Data Types and Math
21. Developing in C for the ATmega328P: Marking Time and Measuring Time
22. Developing in C for the ATmega328P: User Functions
23. Developing in C for the ATmega328P: Multi-tasking the Arduino - Part 1
24. Developing in C for the ATmega328P: Function - tone()
25. Developing in C for the ATmega328P: Using PROGMEM
26. Developing in C for the ATmega328P: structures
27. Developing in C for the ATmega328P: Code vs. Cost
28. Developing in C for the ATmega328P: Pointers
29. Developing in C for the ATmega328P: Servos
30. Developing in C for the ATmega328P: I/O Ports
31. Developing in C for the ATmega328P: Make, Makefile and env.make

AVR Datasheet Notes

Technical tutorial using specific capabilities of the ATmega328P chip. This content is intended to help somone understand how to use the datasheet to implement a specific function using the ATmega328P.

1. AVR Datasheet Note: Blink
2. AVR Datasheet Note: PWM
3. AVR Datasheet Note: analogWrite

Programming Examples

Intermediate tutorials focused on using the AVR-gcc library or examples from the library.

1. AVR-gcc Note: Simple Project
2. Using the Standard C Framework
3. Writing Multitasking Programs
4. Using Makefiles to Automate Development

Hardware Debugging

Technical tutorials on using Bloom, gdb, debugWIRE, a hardware debugger such as the Microchip SNAP or the one on the ATmega328PB Xplained Mini board to debug programs on the microcontroller.

1. Hardware Debug: Using gdb to debug
2. Hardware Debug: Setup Bloom and gdb to Debug
3. Hardware Debug: Examples of Bloom with gdb to Debug
4. Hardware Debug: Hints on Solving Issues Bloom and gdb
5. Hardware Debug: Exploring the ATmega328PB Xplained Mini
6. Hardware Debug: Command and Configuration Reference for Bloom and gdb

Reference Content on C

Reference books which are important for understanding C

1. The C Programming Language Kernighan and Ritchie - available in PDF and paper copy
2. Barr Group: Embedded C Coding Standard
3. SEI CERT C Coding Standard
4. Arduino Resources page
5. comp.lang.c FAQ