void main(){
// variables

int x[5]={0, 1, 2, 4, 8};
char  i = 1 , ss=0 ;
adcon1=6;
trisa = 0; trisb = 0; trisc = 0; trisd = 255; trise = 0;
porta = 0; portb = 0; portc = 0; portd = 0; porte = 0;
PWM1_Init(500); //initialise PWM1 at 5KHz
PWM1_Start(); //start PWM1
while(1) { // start infinit loop
  portb.f7=1; //signal to motor forward direction
  if (portd.f2 == 1)  // if the push button is pushed
    {
     portb = x[i];   // indicator led according to motor speed
     if(i ==1 && ss==0)
          {
           ss=1;
           PWM1_Start();
          }

     PWM1_Set_Duty(i*255/4); // set duty cycle from 25% to 100%
     i++;
     delay_ms(200);
    }
  if (i > 4) 
            {
             i = 0 ;
             ss=0;
             PWM1_Stop();
            }

} //end loop
} //end main

void main(){
// variables

char x[5]={ 1, 2, 4, 8};
unsigned int duty=0;
char  i = 0 , ss=0  , flag=0;
adcon1=6;
 trisb = 0; trisc = 0; trisd.f2 =1;
  portb = 0; portc = 0;
PWM1_Init(500); //initialise PWM1 at 5KHz
while(1) { // start infinit loop

  if (portd.f2 == 1) flag=1;  // if the push button is pushed
  if(portd.f2 == 0  && flag==1)
    {
     i++;
     flag=0;
     if(i ==1 && ss==0)
          {
           ss=1;
           portb.f7=1; //signal to motor forward direction
           PWM1_Start();
          }
     if (i >=5)
            {
             i = 0 ;
             portb =0;   // indicator led according to motor speed
             ss=0;
             PWM1_Stop();
            }
     else portb =(portb & 0xF0)+x[i-1];   // indicator led according to motor speed
      duty= (i*255)/4;
      PWM1_Set_Duty(duty); // set duty cycle from 25% to 100%
    }



} //end loop
} //end main