Скачать или смотреть Interrupt & Poll Programming on SAMD21 (LED Modes + Dual Button Control)

This video demonstrates my solution for Task 5.1C: Interrupt and Poll Programming for Event Driven Embedded Systems using the SAMD21G18A MCU. The project combines hardware interrupts and polling techniques to control LEDs and push buttons under constrained timer resources (TC0 and TCC0 only).

🔹 Project Features:

Button 1: Start → Stop → Reset program sequence (with debounce).

Button 2: Switches between 3 operating modes.

Mode 1: All 6 LEDs blink simultaneously at 0.5 Hz.

Mode 2: LEDs display an up-counting binary counter at 1 Hz.

Mode 3: LEDs display a down-counting binary counter at 1 Hz.

Implemented using CMSIS APIs, NVIC interrupts, and a mix of polling and ISR-based timing.

Efficient timer usage with TC0 and TCC0 only.

🔹 What’s Covered in This Video:

Overview of the task requirements.

Explanation of timer + GPIO setup (registers, NVIC, and ISRs).

Compilation and flashing to SAMD21.

Demonstration of all three modes using two push buttons and six LEDs.

🔹 Tools & Hardware Used:

SAMD21G18A (ARM Cortex-M0+) MCU

CMSIS APIs in C

6 LEDs + 2 push buttons

Arduino IDE / Atmel Studio for build & upload

This project showcases event-driven embedded design by combining interrupt-driven events with polling for mode control, demonstrating how to balance timing requirements when limited timers are available.

#EmbeddedSystems #SAMD21 #InterruptProgramming #CMSIS #EventDriven #SIT329 #ARMcortexM0