Atmega128 Programming Problem

[DragonKlavier]

Hi.

Im trying to move 2 motors with an atmega128 microcontroller. The issue is that i cant change my ports values in execution time. Two results. If i dont call the reverse function, the motor never stops, and if i call reverse() Function, the motor stops, but it doesnt change the movement sense or the moovement speed.

Here my code:

#include <avr/io.h>
#include <util/delay.h>

int cont=0;

void reverse()
{
  		while(1);
		{
			PORTC=0b01010101;
			PORTD|=_BV(PD0); //Se activa el bit 0 del PORTD
			PORTD|=_BV(PD1); //Se activa el bit 1 del PORTB
			
			_delay_us(5000);
			 //de la función, con la variable SH, SH veces
			
			PORTD&=~(_BV(PD0)); //Desactiva el bit 0 del PORTD
			PORTD&=~(_BV(PD1)); //Desactiva el bit 1 del PORTB
			
			
			_delay_us(5000);
		}
  
}

void motors(int pA, int pB, int power, int duration)
{


	//PORTC=0b10101010;
	PORTC=0b01010101;

	
	DDRC= 0xFF; //puerto C como salida
	DDRD= 0xF0;	//Nible alto del puerto D como salida



	
		while (1)
		{
			
			PORTD|=_BV(PD0); //Se activa el bit 0 del PORTD
			PORTD|=_BV(PD1); //Se activa el bit 1 del PORTB
			
			_delay_us(9800);
			 //de la función, con la variable SH, SH veces
			
			PORTD&=~(_BV(PD0)); //Desactiva el bit 0 del PORTD
			PORTD&=~(_BV(PD1)); //Desactiva el bit 1 del PORTB
			
			
			_delay_us(200);
			
			//cont++;

		}
		
		//reverse();
		
		//	return 0; //Como la función no es void se regresa un 0
	
	
	return;
}





int main()
{
	
		int power = -40;
		
		int pA=1;
		int pB=2;
		int duration=20;
		
		motors(pA, pB, power, duration);
		
		return 0;
}

 

[153rd]

Your program never gets out if its while loops.
Do something like this:

While (i <5000)
{
//do your stuff
i++;
}
i = 0;

Not sure about the rest of the code, but try this out first, and see what happens.

 

[CataM]

Agree with the above comment and your function void motors(...) is void, why do you have the return; ?

 

[DragonKlavier]

Im so sorry...I forget one detail:

While(1) and While(something<something)

have the same effect".Thanks