Question

plz write a program in atmel studiu for atmega8 microcontroller running at 7 MHz to drive a dc motor that have 70% duty cycle . i just want to know how to program a dc mortor

sorry i mean 8MHz .

Answer 1

Answer:- The time period of the wave is 1/8 micro-s. For 70% DC-

ON time = 0.7*T = 0.7/8 us = 0.0875 us.
OFF time = 0.3*T = 0.3/8 us = 0.0375 us.

We never program a dc motor. We program the controller which controls the dc motor. The code is written below-

#define F_CPU 8000000UL
#include <avr/io.h>
#include <util/delay.h>

int main(void)
{
DDRB |= (1 << PB2); /* DC motor on pin PB2 */
  
while(1)
{
PORTB |= (1 << PB2); /* high pulse on pin PB2 */
_delay_us(0.0875); /* 0.0875 us delay */
PORTB &= ~(1 << PB2); /* low pulse on pin PB2 */
_delay_us(0.0375); /* 0.0375 us delay */

}
}