🛠️ Tools Used

• 🧠 MCU: i.MX RT1050 (EVKB Board)
• 🧰 IDE: MCUXpresso IDE v24.12
• 🧪 Oscilloscope: Agilent Infiniium DSA90254A (20 GSa/s)
• ⚡ Hardware Setup: GPT2 timer + GPIO toggling for latency analysis

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🚦 Experiments

1. Bare Metal Mode

Measures direct ISR response time using GPT2_COMPARE3.

2. External GPIO Interrupt

Compares:

• Direct ISR handling
• HAL-based ISR with pin comparison and callback

3. FreeRTOS

Uses a high-priority task released by a semaphore from the ISR.

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Cloning the Repository

To clone the repository, use the following command:

git clone https://github.com/jvmreis/nxp_interrupt_lesson.git

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📂 Folder Structure

Path / File	Description
bar_metal/	Bare-metal implementation using GPT2 and GPIO toggle
free_rtos/	FreeRTOS implementation with semaphore-based context switch
docs/	Documentation folder containing lab report and diagrams
.gitattributes	Git attributes file
.gitignore	Git ignore file

📷 How to Enable Disassembly Debugging

In MCUXpresso:

1. Go to Window > Show View > Other
2. Search for Disassembly
3. Select and open the Disassembly view

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📖 Documentation

A full technical lab report is available in PDF and Markdown formats, including:

• Laboratory guide
• Schematic diagrams
• Timing analysis
• nxp AN1278 application note

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📌 License

This project is for educational and research purposes only. No commercial license granted.

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Contributions and feedback are welcome! ⭐