ATMega32 controlling DC Motor direction via buttons

This is another digital input output of ATMega32. In this example I use a single Port of PORTC accepting the digital input from button, and output the control to DC motor.

I use L293 for controlling the direction, and also driving the motor at higher voltage and higher current at +12 V.

Three input buttons are Forward, Stop and Backward. Motor is controlled by PC0 and PC1 pin on the same port.

Source Code:

/*
 * controllingMotorStartStop.c
 *
 * Created: 4/25/2020 8:00:39 PM
 * Author : aki-technical
 */ 
#include <avr/io.h>
#define F_CPU 16000000UL
#include "util/delay.h"
//Test the  PINC7 
#define forward (PINC&0b10000000)
//Test the PINC6
#define stop    (PINC&0b01000000)
//Test the PINC5
#define backward (PINC&0b00100000)
//OUTPUT DATA FOR MOTOR
#define run_forward 0b11100001
#define run_backward 0b11100010
#define stop_running 0b11100000

int main(void)
{
    DDRC=0b00011111; //PINC7.5 INPUT
    PORTC=0b11100000; //PC7.5 SET TO HIGH
    /* Replace with your application code */
    while (1) 
    {
        if (forward==0)
        {
            PORTC=stop_running;
            _delay_ms(250);
            PORTC=run_forward;
        }
        else if (stop==0)
        {
            PORTC=stop_running;
            _delay_ms(250);
            PORTC=stop_running;
        }
        else if (backward==0)
        {
            PORTC=stop_running;
            _delay_ms(250);
            PORTC=run_backward;
        }
    }
}

Back to main tutorial page ATMega32 tutorials in C with Atmel Studio 7.