Developing in C on the AVR ATmega328P

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Introduction

While the Arduino tool set, (both the Arduino IDE and Arduino software framework) are outstanding for quickly developing a working prototype, they do so with a combination of a graphical-user-interface (GUI), the C++ language and Arduino-only classes. This in itself, isn’t a problem, one can be quite efficient and productive using this approach.

This approach is an issue if you are at a university or job which expects a standards-based C language proficiency. It is also an issue, if your class or job, requires understanding how to use command-line-interface (CLI)-based tools. The C language, and not C++, is the basis of a significant number of embedded systems development.

This set of entries are written to help you learn how develop embedded ANSI C programs for the AVR family and specifically the ATmega328P (Arduino Uno R3). While doing so, it will also use a set of tools which can serve as the basis of an intermediate-level software programmer.

Pages of Significant Interest

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.

A broader-based approach using the AVR_C repository is recommended for a detailed approach to learning C for the AVR-family of microcontrollers.

  1. Developing in C for the ATmega328P: Getting Started
  2. Developing in C for the ATmega328P: Setup Introduction
    1. Developing in C for the ATmega328P: Raspberry Pi and VS Code Setup (Best Method)
    2. Developing in C for the ATmega328P: Linux Setup (Advanced)
    3. Developing in C for the ATmega328P: macOS Setup (Advanced)
    4. Developing in C for the ATmega328P: Windows/WSL Setup (Deprecated)
    5. Developing in C for the ATmega328P: Windows 10 Setup (Advanced)
  3. Developing in C for the ATmega328P: Using git
  4. Developing in C for the ATmega328P: Edit
  5. Developing in C for the ATmega328P: Build
  6. Developing in C for the ATmega328P: Upload
  7. Developing in C for the ATmega328P: AVR_C Library Functions
  8. Developing in C for the ATmega328P: Using a Serial Monitor
  9. Developing in C for the ATmega328P: Functions - Serial input/output
  10. Developing in C for the ATmega328P: Function - analogWrite()
  11. Developing in C for the ATmega328P: Functions - Serial input/output
  12. Developing in C for the ATmega328P: Function - digitalWrite()
  13. Developing in C for the ATmega328P: Function - pinMode()
  14. Developing in C for the ATmega328P: Function - digitalRead()
  15. Developing in C for the ATmega328P: Struct - buttons[]
  16. Developing in C for the ATmega328P: Function - analogRead()
  17. Developing in C for the ATmega328P: Hints
  18. Developing in C for the ATmega328P: Mapping Values
  19. Developing in C for the ATmega328P: Using Data Types and Math
  20. Developing in C for the ATmega328P: Marking Time and Measuring Time
  21. Developing in C for the ATmega328P: User Functions
  22. Developing in C for the ATmega328P: Multi-tasking the Arduino - Part 1
  23. Developing in C for the ATmega328P: Function - tone()
  24. Developing in C for the ATmega328P: Using PROGMEM
  25. Developing in C for the ATmega328P: structures
  26. Developing in C for the ATmega328P: Code vs. Cost
  27. Developing in C for the ATmega328P: Pointers
  28. Developing in C for the ATmega328P: Servos
  29. Developing in C for the ATmega328P: I/O Ports
  30. Developing in C for the ATmega328P: Make, Makefile and env.make
  31. Developing in C for the ATmega328P: Better Serial Input
  32. Developing in C for the ATmega328P: Using the GNU Linker to Enhance printf()
  33. Serial Applications for Embedded Development
  34. Developing in C for the ATmega328P: Using the GNU Linker to Enhance printf()
  35. Developing in C for the ATmega328P: Better Serial Input
  36. Developing in C for the ATmega328P: A Second Serial Port
  37. Developing in C for the ATmega328P: Raspberry Pi and VS Code Setup Part 1
  38. Developing in C for the ATmega328P: Raspberry Pi and VS Code Setup Part 2
  39. Developing in C for the ATmega328P: Raspberry Pi and VS Code Setup Part 3
  40. Developing in C for the ATmega328P: Buffer Overflow

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. Developing in C for the ATmega328P: Comparison of Languages
  2. AVR-gcc Note: Simple Project
  3. Using the Standard C Framework
  4. Writing Multitasking Programs
  5. 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

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