7-Segment Display Controlled by Atmega328P Microcontroller

Overview

This project controls a 7-segment display using an Atmega328P microcontroller. The code reads an analog value from an ADC and displays different patterns on the display based on the input value.

Components

• Atmega328P Microcontroller
• 7-Segment Display
• Analog-to-Digital Converter (ADC)

Code Description

• Libraries: AVR standard libraries for I/O and interrupts are included.
• Constants: The oscillator frequency is defined.
• 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.
• Global Variables: 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.

Usage

Connect the 7-segment display and ADC to the microcontroller as per the defined ports in the code. Power the circuit and observe the displayed patterns on the 7-segment display based on the ADC input.

Compilation and Execution

• Use an AVR C compiler to compile the code.
• Upload the compiled binary to the Atmega328P microcontroller using a compatible programmer.

Simulation in Proteus

This code was simulated using Proteus simulation software. The simulation setup included the Atmega328P microcontroller, the 7-segment display, and the ADC module.

The simulation demonstrated the following:

• Proper scanning and display of numbers on the 7-segment display based on simulated ADC input.

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