How to take input from switches on Arduino? | Atmega2560 | GPIO Part 2 | 2026 | Amitabh Pathak

👇 Follow me on LinkedIn:   / amitabh-pathak-b91199230   Stop relying on digitalRead() and learn how to process inputs at the hardware level! In Part 2 of this bare-metal programming series for the Arduino Mega (ATmega2560), we transition from controlling outputs to reading physical inputs. Instead of using standard Arduino abstraction layers, we dive into the ATmega2560 datasheet to understand and configure GPIO pins as inputs using registers. You'll learn how to properly configure the Data Direction Register (DDR), read the physical state of a switch using the PIN register. Mastering input register manipulation is crucial for writing ultra-fast, optimized code for embedded systems! TIMESTAMPS: 00:00 - Introduction 00:46 - Circuit Diagram 03:14 - Code & Simulation 11:47 - Conclusion #ArduinoMega #Atmega2560 #BareMetal #EmbeddedSystems #AVR #Microcontroller #Wokwi #VSCode