🚀 UART-I2C-SPI-CAN-PROTOCALS

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📘 Overview

A complete embedded C practice repository implementing:

UART • I2C • SPI • CAN

using register-level programming on LPC21xx (ARM7) microcontrollers.

Designed for:

• 📘 Embedded systems learning
• 🎯 Interview preparation
• 🧠 Protocol-level understanding
• 🛠 Hands-on hardware practice

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❓ Why This Repository?

Most learners understand protocols theoretically, but struggle with:

• Registers
• Pin configuration
• Real hardware behavior

This repository focuses on how protocols actually work inside the MCU:

✔ Direct register manipulation
✔ Pin Connect Block configuration
✔ Polling-based communication
✔ Industry-oriented embedded C code

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📡 Protocols Implemented

🔹 UART – Universal Asynchronous Receiver Transmitter

• Baud rate calculation
• LSR, THR, RBR registers
• TX/RX polling mechanism
• Serial debugging support

🔹 I2C – Inter-Integrated Circuit

• Master mode implementation
• START / STOP / ACK / NACK
• EEPROM byte read & write
• Status register analysis

🔹 SPI – Serial Peripheral Interface

• Master mode configuration
• Full-duplex communication
• CPOL & CPHA modes
• High-speed data transfer

🔹 CAN – Controller Area Network

• Message-based communication
• Arbitration & error handling
• Multi-node network
• Automotive-grade protocol

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📁 Repository Structure