#define DATAOUT 11//MOSI
#define DATAIN  12//MISO
#define SPICLOCK  13//sck
#define SLAVESELECT 10//ss
#define REGISTERSET 9
// opcodes

#define CLR 1
#define HOME 2
#define ON 0x0F
#define FUN_INIT 57
#define BIAS_SET 28
#define POWER_CTL 82
#define FOLLOWER_CTL 105
#define CONTRAST_SET 116
#define ENTRY_MODE_SET 6

byte clr;

char spi_transfer(volatile char data)
{
  SPDR = data;                    // Start the transmission
  while (!(SPSR & (1<<SPIF)))     // Wait for the end of the transmission
  {
  };
  return SPDR;                    // return the received byte
}

void lcd_print(char *data) {
 int i=0;
 while(data[i]!=0) {
    digitalWrite(REGISTERSET, HIGH);
    spi_transfer(data[i]);
    digitalWrite(REGISTERSET, LOW);
    delay(1);
    i++;
 }
}

void setup(void) {
  pinMode(DATAOUT, OUTPUT);
  pinMode(DATAIN, INPUT);
  pinMode(SPICLOCK,OUTPUT);
  pinMode(SLAVESELECT,OUTPUT);
  pinMode(REGISTERSET,OUTPUT);
  digitalWrite(SLAVESELECT,HIGH);
  SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<SPR0);
  clr=SPSR;
  clr=SPDR;
   delay(10);
   digitalWrite(SLAVESELECT,LOW);

   spi_transfer(FUN_INIT); //function set
   delay(30);
   spi_transfer(BIAS_SET);
   delay(30);
   spi_transfer(POWER_CTL);
   delay(30);
   spi_transfer(FOLLOWER_CTL);
   delay(30);
   spi_transfer(CONTRAST_SET);
   delay(30);
   spi_transfer(ON); //write enable
   delay(30);
   spi_transfer(CLR); //write enable
   delay(30);
   spi_transfer(ENTRY_MODE_SET);
   delay(30);

   lcd_print("I rawk like hell");


}

void loop() {
 delay(500);
}