writing.ino

//constants
static const int IN = LOW;
static const int OUT = HIGH;
static const int pulseDelayTime = 6;

//pins
int indexPin = 2; //8 on the drive INDEX
int track0Pin = 3; //26 on the drive. TRACK 0
int dirPin = 6; //18 on the drive. DIRECTION
int stepPin = 7; //20 on the drive. STEP
int motorEnableBPin = 9; //16 on the drive. MOTOR ENABLE B
int dataPin = 10; //30 on the drive. RDATA
int writeDataPin = 4; //22 on the drive WDATE
int writeEnablePin = 5; //24 on the drive WGATE

byte data[10] = {0};
unsigned int index = 0;
unsigned int pos = 0;

void setup() {
  //initial delay
  delay(3000);

  //setup serial monitor
  Serial.begin(9600);

  //setup pins.
  pinMode(dirPin, OUTPUT);
  pinMode(stepPin, OUTPUT);
  pinMode(motorEnableBPin, OUTPUT);
  pinMode(indexPin, INPUT_PULLUP);
  pinMode(track0Pin, INPUT_PULLUP);
  pinMode(dataPin, INPUT_PULLUP);
  pinMode(writeDataPin, OUTPUT);
  pinMode(writeEnablePin, OUTPUT);


  //turn the motor off initially
  digitalWrite(motorEnableBPin, HIGH);

  stepAllTheWayOut();
  //print state here.
  Serial.println("Setup done.");

  writeData(170);
  delay(500);
  readData();

}

//byte mode(data[10]){
//  return data[0];
//}

//move the head towards the outside a little
void stepOut() {
  digitalWrite(dirPin,HIGH);
//  Serial.println("SteppingOut");
  stepPulse();
}

//move the head towards the center a little
void stepIn() {
  digitalWrite(dirPin,LOW);
//  Serial.println("SteppingIn");
  stepPulse();
}

//step the read/write head all the way to the center
void stepAllTheWayIn() {
  for(int i=0;i<81;i++) {
    stepIn();
  }
}

//step the read/write head all the way to the outside
void stepAllTheWayOut() {
  while (digitalRead(track0Pin) == 1){
    stepOut();
  }
}

void writeData(byte data){
  Serial.println("Writing");
  digitalWrite(writeEnablePin, LOW);
  digitalWrite(motorEnableBPin, LOW);
  stepAllTheWayOut();
  for(unsigned i = 0; i<10; i++){
    for(unsigned index = 0; index<=8; index++){
      digitalWrite(writeDataPin,bitRead(data,index));
      Serial.print(bitRead(data,index));
      delay(500);
      digitalWrite(writeEnablePin, HIGH);
      stepIn();
      digitalWrite(writeEnablePin, LOW);
    }
    Serial.println("");
  }
  digitalWrite(motorEnableBPin, HIGH);
  digitalWrite(writeEnablePin, HIGH);
}

void readData(){
  Serial.println("Reading");
  byte data[10] = {0};
  digitalWrite(motorEnableBPin, LOW);
  digitalWrite(writeEnablePin, HIGH);
  stepAllTheWayOut();
  for(unsigned i = 0; i<10; i++){
    for(unsigned index = 0; index<=8; index++){
      delay(100);
      Serial.print(digitalRead(dataPin));
      stepIn();
    }
    Serial.println("");
  }
  digitalWrite(motorEnableBPin, HIGH);
}

void stepPulse() {
  digitalWrite(stepPin,LOW);
  delay(pulseDelayTime);
  digitalWrite(stepPin,HIGH);
}
void loop() {
}