🚀 Arduino MEGA (ATmega640/2560) Bare Metal Programming

Welcome to the Bare Metal Programming repository! This project serves as a comprehensive guide to direct register manipulation using the ATmega640/2560 microcontroller. All simulations are designed to run on Wokwi.

📂 Repository Structure

The assignments and projects are categorized by interface type:

• 1. LED Assignments: Fundamental GPIO operations using LEDs.
• 2. Seven Segment Display: Interfacing with 7-segment displays.
• 3. Dot Matrix Display: Controlling LED matrices.
• 4. Keypad Interfaces: Reading input from keypads.
• 5. Pushbutton Assignments: Controlling inputs with buttons.
• My Projects: Custom personal projects.

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1. 💡 LED Assignments

Set 1: Basic LED Control

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Connect LED to Port J bit 0	DDRJ, PORTJ	View
2	Problem 2	Connect LED to Port D bit 7	DDRD, PORTD	View
3	Problem 3	Connect LEDs to Port H bit 6 & 0	DDRH, PORTH	View
4	Problem 4	Connect LEDs to Port C bit 6 & 7	DDRC, PORTC	View
5	Problem 5	Connect LEDs to Port A bit 0-3	DDRA, PORTA	View
6	Problem 6	Connect LEDs to Port B bit 4-7	DDRB, PORTB	View
7	Problem 7	Connect 8 LEDs to Port F	DDRF, PORTF	View
8	Problem 8	Connect 8 LEDs to Port K (Odd/Even)	DDRK, PORTK	View
9	Problem 9	Connect 8 LEDs to Port L (Even)	DDRL, PORTL	View
10	Problem 10	Connect 8 LEDs to Port E (Specific)	DDRE, PORTE	View

Set 2: Sequence & Control

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Connect 8 LEDs to Port A (Blink All)	DDRA, PORTA	View
2	Problem 2	Connect 8 LEDs to Port B (Seq Accumulate)	DDRB, PORTB	View
3	Problem 3	Connect 8 LEDs to Port C (Seq Blink)	DDRC, PORTC	View
4	Problem 4	Connect 8 LEDs to Port C (Seq Blink Single)	DDRC, PORTC	View
5	Problem 5	Connect LED to Port J Bit 0 (Blink)	DDRJ, PORTJ	View
6	Problem 6	Connect 8 LEDs to Port K (Even Blink)	DDRK, PORTK	View
7	Problem 7	Connect 8 LEDs to Port L (0-3 Seq)	DDRL, PORTL	View
8	Problem 8	Connect 8 LEDs to Port F (4-7 Seq)	DDRF, PORTF	View
9	Problem 9	Connect 8 LEDs to Port F (7-4 Reverse)	DDRF, PORTF	View
10	Problem 10	Connect 8 LEDs to Port F (Code 7-4 / Obj 3-0)	DDRF, PORTF	View

Set 3: Pattern Logic

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Connect 8 LEDs to Port A (Pairs 0,4...3,7)	DDRA, PORTA	View
2	Problem 2	Connect 8 LEDs to Port A (Seq Pairs 0-4 w/ Clear)	DDRA, PORTA	View
3	Problem 3	Connect 8 LEDs to Port A (Seq 0-7, 7-0)	DDRA, PORTA	View
4	Problem 4	Connect 8 LEDs to Port A (Pattern 0,2,1,3...)	DDRA, PORTA	View
5	Problem 5	Connect 8 LEDs to Port A (Pairs 01, 67, 23, 45)	DDRA, PORTA	View
6	Problem 6	Connect 8 LEDs to Port A (Pairs 45, 23, 67, 01)	DDRA, PORTA	View
7	Problem 7	Connect 8 LEDs to Port A (Groups 012, 567, 34)	DDRA, PORTA	View
8	Problem 8	Connect 8 LEDs to Port A (Groups 34, 567, 012)	DDRA, PORTA	View
9	Problem 9	Connect 8 LEDs to Port A (Accumulate 0-7)	DDRA, PORTA	View
10	Problem 10	Connect 8 LEDs to Port A (Accumulate 7-0)	DDRA, PORTA	View

Set 4: Advanced LED Operations

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Dual Port ON	DDRA, DDRB	View
2	Problem 2	Alternating Rows	DDRA, DDRB	View
3	Problem 3	Sequential Row Blink	DDRA, DDRB	View
4	Problem 4	Parallel Sequential Mirror	DDRA, DDRB	View
5	Problem 5	Row-by-Row Sequence	DDRA, DDRB	View
6	Problem 6	Parallel Sequential Mirror	DDRA, DDRB	View
7	Problem 7	4 by 4 Blink (See README)	DDRA, DDRB	View
8	Problem 8	Alternate Pattern Blink	DDRA, DDRB	View
9	Problem 9	Pair Blink	DDRA, DDRB	View
10	Problem 10	Reverse Pair Blink	DDRA, DDRB	View

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2. 🔢 Seven Segment Display

Set 1: Basic Display

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Interface 7-Segment (Display 0-9)	DDRA, PORTA	View
2	Problem 2	Display '1' (Single Digit)	DDRA, PORTA	View

Set 2: Sequence & Patterns

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Sequence 0-9 (Common Cathode)	DDRA, PORTA, TCNT1	View
2	Problem 2	Sequence 0-9 (Common Anode)	DDRA, PORTA, TCNT1	View
3	Problem 3	(Duplicate of Problem 1)	DDRA, PORTA, TCNT1	View
6	Problem 6	Countdown 9-0	DDRA, PORTA, TCNT1	View
7	Problem 7	Even Numbers (0-8)	DDRA, PORTA, TCNT1	View
8	Problem 8	Even then Odd Sequence	DDRA, PORTA, TCNT1	View
9	Problem 9	Alphanumeric Sequence	DDRA, PORTA, TCNT1	View
10	Problem 10	Prime Numbers (2,3,5,7)	DDRA, PORTA, TCNT1	View

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3. 📉 Dot Matrix Display

Assignments

(Coming Soon)

#	Problem	Objective	Registers Used	Simulation
-	-	-	-	-

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4. 🎹 Keypad Interfaces

Assignments

(Coming Soon)

#	Problem	Objective	Registers Used	Simulation
-	-	-	-	-

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5. 🔘 Pushbutton Assignments

Set 1: Basic Input Logic

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Blink All LEDs (PB0)	DDRA, PINB	View
2	Problem 2	Blink All LEDs (PB1)	DDRA, PINB	View
3	Problem 3	Sequential Blink (PB3)	DDRA, PINB	View
4	Problem 4	Reverse Sequence (Any)	DDRA, PINB	View
5	Problem 5	Even LEDs (PB0)	DDRA, PINB	View
6	Problem 6	Odd LEDs (PB6)	DDRA, PINB	View
7	Problem 7	Direct Mapping	DDRA, PINB	View
8	Problem 8	Reverse Mapping	DDRA, PINB	View
9	Problem 9	Continuous Sequence	DDRA, PINB	View
10	Problem 10	Specific Pattern (PB0)	DDRA, PINB	View

Set 2: Advanced Sequences

#	Problem	Objective	Registers Used	Simulation
1	Problem 1	Sequence 1-2-5-6 (PB1)	DDRA, PINB	View
2	Problem 2	Sequence 3-1-7-4 (PB2)	DDRA, PINB	View
3	Problem 3	Sequence 0-1-5-6 (PB3)	DDRA, PINB	View
4	Problem 4	Sequence 3-5-7-6 (PB5)	DDRA, PINB	View
5	Problem 5	Sequence 0-1-4-7 (PB7)	DDRA, PINB	View

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🛠️ My Projects

Project Name	Description	Link
-	-	-

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