
GitHub Copilot Instructions are persistent, project-wide rules, typically defined in a .github/instructions/copilot-instructions.md file, that act as an invisible foundation for every prompt you write. Instead of repeatedly telling the AI how to format its output, Instructions automatically guide Copilot’s behaviour in the background.
For this course, we use Instructions to guarantee that every C module Copilot generates automatically complies with Barr-C styling and strictly adheres to our 4-layer architecture (App → Interface → Device → HAL).
GitHub Copilot Skills are targeted, actionable commands (often invoked using a forward slash, such as /fix, /explain, or /tests) that direct the AI to perform a specific, predefined task on your codebase. While Instructions provide the passive background rules for generating new modules, Skills are the active tools you invoke to interact with existing code. In the context of this course, you will use Skills to instantly flash and debug the code.
GitHub Copilot Custom Agents (invoked using the @ symbol, such as @workspace or your custom @C_Expert, or simply selecting from the dropdown list) are specialised AI personas designed to act as dedicated domain experts for a specific context. Unlike the general-purpose Copilot, a Custom Agent is pre-configured with deep, focused knowledge of a particular workflow, language, or framework. For this course, you built a custom C Expert agent to provide highly accurate, context-aware assistance tailored explicitly to C programming, memory management, and embedded systems, ensuring the AI understands the nuances of your architecture without needing constant basic explanations.
Custom Prompts are the specific, carefully structured queries you write in the Copilot chat to tackle unique, complex tasks that fall outside the scope of automated Skills. While Instructions set the background rules and Agents provide the expertise, Custom Prompts are how you steer the AI in the moment. In this course, you will learn how to engineer Custom Prompts to help with reviewing the code and generating documentation.
Stop writing firmware that only works on one chip. Most electronic engineers can make a microcontroller "work," but few can design firmware that is professional, safe, and truly portable. If your main.c is hundreds of lines long, or if switching from an STM32 to an AVR requires a total rewrite, this course is for you.
This course is a deep dive into Firmware Architecture. We move beyond simple "bare-metal" coding and teach you how to think like a Software Architect. You will learn to build a robust, 4-layer stack that separates your high-level logic from the low-level silicon.
The 4-Layer Framework You Will Master:
The HAL (Hardware Abstraction Layer): Hiding the silicon and register complexity.
The Device Layer: Building reusable drivers for external components like sensors and LCDs.
The Interface Layer: Creating a "contract" between your hardware and your brain.
The Application Layer: Writing pure, hardware-agnostic business logic.
Why This Course Is Different:
Architectural Focus: We don't teach C syntax; we teach C strategy.
Standards: Every line of code follows standards, including "Yoda Conditions" and strict naming conventions.
Hardware Agnostic: The principles you learn here apply to any MCU, STM32, PIC, AVR, ESP32, or ARM Cortex.
What You Will Learn
Design a modular 4-layer firmware project from scratch.
Implement the code according to an Embedded C Coding Standard.
Decouple application logic from hardware using the Interface Pattern.
Create a "Professional Starter Kit" template to jump-start any future project.
Structure the Application Layer with dedicated Init, Callback, and Global modules.
Apply defensive programming techniques to eliminate "Magic Numbers" and assignment bugs.
Using GitHub Copilot to assist you in coding.
Are there any course requirements or prerequisites?
Understanding of the C programming language (loops, pointers, structs).
Familiarity with any Microcontroller (MCU) and basic electronics.
A desire to move from "Hobbyist" to "Professional" firmware habits.
Who this course is for:
Electronic Engineers who want to write better, more structured software.
Embedded Developers struggling with code portability and unmanageable projects.
Students & Hobbyists looking to enter the professional embedded systems industry.
Firmware Managers who need a standard architectural framework for their team.