!.AIM:
Your Answers
Implement a system on the simulator for controlling a DC motor using L293 motor driver, monitor its status and print the running status of motor on the LCD Display.
Goals:
Implement a system on simulator for Controlling the DC motor using L293 motor driver.
Displaying the running status of DC motor on the LCD display.
Key Highlights of the Project:
The DC motor can be controlled by using L293 motor driver.
The speed of a DC motor can be controlled by varying its input voltage, for doing this is to use PWM (Pulse Width Modulation).
L293D IC is a typical Motor Driver IC which allows the DC motor to drive on any direction
Deliverables of this project:
Implement the system for controlling DC motor.
Controlling the speed of the DC motor using PMW.
Displaying the present running status of DC machine on LCD display.
code:
#include avr //preprocessor directive
#define F_CPU 16000000ul
#include "avr/interrupt.h"//Preprocessor directive of an avr interrupt
#include
#define sw_dir (PIND&(1<<1))
#define sw_spd (PIND&(1<<2))
#define pw (PINC&(1<<3))
#define lcd_port PORTB
#define RS_high PORTD|=(1<<5)
#define RS_low PORTD|=(1<<5)
#define EN_high PORTD|=(1<<6)
#define EN_low PORTD|=(1<<6)
unsigned char i;
void lcd_cmd(char cmd)
{
lcd_port=(cmd&0xf0); //Masking 4 bits for 4 bit LCD mode//
RS_low;//reset
EN_low;//enable
_delay_ms(1);
EN_high;//enable high
lcd_port=((cmd<<4)&(0xf0));
RS_low;
EN_low;
_delay_ms(1);
EN_high;
}
void lcd_data(char data)//void of lcd delay
{
lcd_port=(data &0xf0); //masking 4 bits for bit LCD mode//
RS_high;//reset high
EN_low;//enable low
_delay_ms(1);
EN_high;
lcd_port=((data<<4)&(0xf0));
RS_high;
EN_low;
_delay_ms(1);
EN_high;
}
void lcd_init()
{
lcd_cmd(0x02);_delay_ms(5); //return the cursor to home//
lcd_cmd(0x01);_delay_ms(5); //clear screen //
lcd_cmd(0x0C);_delay_ms(5); //display ON cursor OFF//
lcd_cmd(0x06);_delay_ms(5); //increment cursor//
lcd_cmd(0x80);_delay_ms(5); //force cursor to begin 1st line //
lcd_cmd(0x28);_delay_ms(5); //used for 4 bits lcd mode //
}
void lcd_out(char x, char y, char *str)
{
cursorpos(x,y);//cursor pay of x,y
while (*str)//while string pointer
{
lcd_data(*str);
str++;
}
}
void cursorpos(char x, char y)
{
if ((x<1||x>2)||(y>16)||(y<1))//execution of if loop
{
x=1;//initialising x=1
y=1;//initialising y=1
}
if (x==1)
{
lcd_cmd(0x7f+y);
}
else
{
lcd_cmd(0xBF+y);
}
}
int main()//execution of main function
{
DDRB=0xFF;//datadirective register Bb is enabled
DDRA|=((1<<0)|(1<<1));port 0 and 1 is enabled
DDRD&=~(1<<1);//port D1 is reest
DDRD&=~(1<<2);
DDRD|=(1<<5);
DDRD|=(1<<6);
DDRC&=~(1<<3);
PORTD|=(1<<2);
PORTC|=(1<<3);
i=64;
TCCR0=0X61;
GICR=(1<<int0);
MCUCR=0X02;
sei();
lcd_init();
while (1)
{
while(pw==0)
{
if (sw_dir==0)
{
PORTA=0b00000001;
lcd_out(1,1,"Motor is Running");
lcd_out(2,3,"clockwise");
}
else
{
PORTA=0b00000010;
lcd_out(1,1,"Motor is Running");
lcd_out(2,3,"anticlockwise");
}
OCR0=i;
}
PORTA=0X00;//port a is enabled
lcd_out(1,1," Motor is OFF");
lcd_out(2,3,"CAUTION !!!");
}
}
ISR(INT0_vect)//interupt service routine 0
{
i=i+20;
}</int0);
OUTPUT:
Expected Outcomes/REPORTS:
Implement a system on simulator to control a DC motor using PMW.
Monitoring the running status of the DC motor using L293 motor driver which allows the DC motor to drive on any direction.
Running status i.e. on which direction the DC motor is running is to be displayed on the LCD screen.