How to program GPIO pins on Arduino (Atmega2560) | Part 1 : Outputs

Stop relying on digitalWrite() and learn how to control your hardware like a pro! 🚀 In this video, we dive into bare-metal programming for the Arduino Mega (ATmega2560). Instead of using standard Arduino abstraction layers, we will look directly at the ATmega2560 datasheet to understand and configure GPIO (General Purpose Input/Output) pins using registers. Part 1 focuses entirely on configuring pins as Outputs and driving them high or low. Mastering register manipulation gives you faster execution speeds, significantly lower code memory footprint, and a deeper understanding of embedded systems architecture. What we cover in this video: ✅ The theory behind Port Registers: DDR, PORT, and PIN ✅ How to read the ATmega2560 datasheet for GPIO mapping ✅ Step-by-step bitwise operations in C to turn an LED on/off ✅ Simulating our bare-metal code using VS Code, PlatformIO, and Wokwi 📌 Timestamps 00:00 - Introduction to Bare-Metal & Registers 01:05 - Pinouts 02:55 - Reading the ATmega2560 Datasheet for GPIO Mapping 04:45 - Understanding DDRx, PINx and PORTx Registers 06:15 - Writing the Code in VS Code & PlatformIO 09:47 - Simulating LED ON 10:02 - Code for turning LED on and off 10:40 - Simulating the toggling of LED 10:48 - Explanation of Code 12:32 - Second Example with 8 LEDs 14:50 - Will teach taking inputs in second video and Outro in Part 2, we will configure registers for GPIO Inputs! #ArduinoMega #EmbeddedSystems #AVR #Atmega2560 #BareMetal #Microcontroller #platformio 👇 Follow me on LinkedIn:   / amitabh-pathak-b91199230