Arduino chip as Stepper Controller

Using Arduino Motors, Mechanics, Power and CNC
11

****** This code has a problem... the interrupts don't function the way I wrote it. Can't have 2 interrupt routines on one interrupt...
But if you look farther down I have some cleaner code that does work...

Here's the latest code -
I chose to use 2 interrupts on the direction pin as I could simplify the code, and thus make it run faster.
OOPS... That didn't work to well, only got the second one of the 2...

There are 3 step procedures - 2 are commented out, the active one is for half stepping.
Here it is -

/*
Step & Direction Stepper Driver
Pins 9, 10, 11, 12 are tied to transistors
for each of the motor phases.
Pins 2 & 3 are used as interrupts,
Pin 2 as Step and 3 as Direction.
*/

int pin1 =9;
int pin2 = 10;
int pin3 = 11;
int pin4 = 12;
int pinDir = 3;
volatile int ctr;
volatile int dir;
void setup()
{
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(2, INPUT);
  ctr=0;
  dir = 0;
  attachInterrupt(0, Step, RISING);
  attachInterrupt(1, DirPos, RISING);
  attachInterrupt(1, DirNeg, FALLING);
}

void loop()
{
  
}

/* This pattern for simple stepping */  
/*
void Step()
{
 if (dir)
 {
   ctr-- ;
 }
 else
 {
   ctr++ ;
 }
 ctr = ctr & 3;

 switch (ctr){
 case 0:
   digitalWrite(4,HIGH);
   digitalWrite(5,LOW);
   digitalWrite(6,LOW);
   digitalWrite(7,LOW);
   break;
 case 1:
   digitalWrite(4,LOW);
   digitalWrite(5,HIGH);
   digitalWrite(6,LOW);
   digitalWrite(7,LOW);
   break;
 case 2:
   digitalWrite(4,LOW);
   digitalWrite(5,LOW);
   digitalWrite(6,HIGH);
   digitalWrite(7,LOW);
   break;
 case 3:
   digitalWrite(4,LOW);
   digitalWrite(5,LOW);
   digitalWrite(6,LOW);
   digitalWrite(7,HIGH);
   break;
 }
}
*/
/* use this sequence for wave stepping */  
/*
void Step()
{
 if (dir)
 {
   ctr-- ;
 }
 else
 {
   ctr++ ;
 }
 ctr = ctr & 3;

 case 0:
   digitalWrite(4,HIGH);
   digitalWrite(5,HIGH);
   digitalWrite(6,LOW);
   digitalWrite(7,LOW);
   break;
 case 1:
   digitalWrite(4,LOW);
   digitalWrite(5,HIGH);
   digitalWrite(6,HIGH);
   digitalWrite(7,LOW);
   break;
 case 2:
   digitalWrite(4,LOW);
   digitalWrite(5,LOW);
   digitalWrite(6,HIGH);
   digitalWrite(7,HIGH);
   break;
 case 3:
   digitalWrite(4,HIGH);
   digitalWrite(5,LOW);
   digitalWrite(6,LOW);
   digitalWrite(7,HIGH);
   break;
 }
}
*/  
/* Use this sequence for half stepping */

void Step()
{
  if (dir)
  {
    ctr-- ;
  }
  else
  {
    ctr++ ;
  }
  ctr = ctr & 7;
  switch (ctr){
  case 0:
    digitalWrite(4,HIGH);
    digitalWrite(5,LOW);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    break;
  case 1:
    digitalWrite(4,HIGH);
    digitalWrite(5,HIGH);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    break;
  case 2:
    digitalWrite(4,LOW);
    digitalWrite(5,HIGH);
    digitalWrite(6,LOW);
    digitalWrite(7,LOW);
    break;
  case 3:
    digitalWrite(4,LOW);
    digitalWrite(5,HIGH);
    digitalWrite(6,HIGH);
    digitalWrite(7,LOW);
    break;
  case 4:
    digitalWrite(4,LOW);
    digitalWrite(5,LOW);
    digitalWrite(6,HIGH);
    digitalWrite(7,LOW);
    break;
  case 5:
    digitalWrite(4,LOW);
    digitalWrite(5,LOW);
    digitalWrite(6,HIGH);
    digitalWrite(7,HIGH);
    break;
  case 6:
    digitalWrite(4,LOW);
    digitalWrite(5,LOW);
    digitalWrite(6,LOW);
    digitalWrite(7,HIGH);
    break;
  case 7:
    digitalWrite(4,HIGH);
    digitalWrite(5,LOW);
    digitalWrite(6,LOW);
    digitalWrite(7,HIGH);
    break;
  }  
}  

void DirPos()
{
    dir = 0;
}
void DirNeg()
{
    dir = -1;
}