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
32. Developing in C for the ATmega328P: Better Serial Input
33. Developing in C for the ATmega328P: Using the GNU Linker to Enhance printf()

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