Atmega328P Counter Project

Overview

This project implements a counter system using an Atmega328P microcontroller. It provides four modes of operation:

• Automatic Counter: Counts automatically from 0 to 159 when connected.
• Manual Counter (Increase): Allows manual increase of the counter from 0 to 159 using an "ascending" button.
• Manual Counter (Decrease): Allows manual decrease of the counter from 159 to 0 using a "descending" button.
• ADC Display: Displays the ADC potentiometer reading on four 7-segment displays, representing a range from 0V to 5V as 00 to 999.

Components

• Atmega328P microcontroller
• 4 x 7-segment displays
• Potentiometer
• Push buttons (ascending, descending, and mode selection)
• Resistors, capacitors, and other basic electronic components
• Power supply

Code Description

• Libraries and Constants: AVR standard libraries and oscillator frequency definition are included.
• Macros: Macros are defined for port manipulation.
• Functions:
  • init_ports(): Initializes the microcontroller's ports.
  • init_timer0(): Initializes Timer0 for scanning the display.
  • on_timer0(): Turns on Timer0.
  • off_timer0(): Turns off Timer0.
  • ADC_init(): Initializes the Analog-to-Digital Converter.
  • ADC_on(): Turns on the Analog-to-Digital Converter.
• Variables: Global variables for storing digit values and a counter variable.
• Main Function (main()):
  • Initializes ports, Timer0, and ADC.
  • Enters an infinite loop where it reads ADC values and displays corresponding patterns on the 7-segment display based on the selected mode.

Usage

1. Connect the hardware components according to the circuit diagram.
2. Compile the code using AVR-GCC.
3. Flash the compiled binary to the Atmega328P using AVRDUDE or any other AVR programmer.
4. Power up the circuit and observe the behavior based on the selected mode.

Above is a screenshot of the simulation in action, showing the display of different numbers on the 7-segment display.