/*


 * SPI pin numbers:
 * SCK   13  // Serial Clock.
 * MISO  12  // Master In Slave Out.
 * MOSI  11  // Master Out Slave In.
 * SS    10  // Slave Select
 *

 */
// Include SPI (Serial Peripheral Interface) library. Does not support SPI Slave.
#include <SPI.h>
boolean ack = 0;
#define ACK 2

byte buffer =0;
byte rx[10] ={0,0,0,0,0,0,0,0,0,0};

bool SSlast = HIGH;
byte clr =0;

 void stat_upd(byte dat, byte ric){
Serial.println("---------------------------------------------");
      Serial.println("Sent:");
      Serial.println(dat, HEX);

      Serial.println("Received:");  //0x81 in teoria
      Serial.println(ric, HEX);
   return;
 }
//Initialize SPI slave.
void SlaveInit(void) {
  // Initialize SPI pins.
  pinMode(SCK, INPUT);
  pinMode(MOSI, INPUT);
  pinMode(MISO, OUTPUT);
  pinMode(SS, INPUT);
  pinMode (ACK,OUTPUT);   ////////////////////////////////////////////////////// PIN 5 ACK
  SPI.begin();
  // Enable SPI as slave.

  SPCR = 0x6F;
  clr=SPSR;
  clr=SPDR;

}
// SPI Transfer.
byte SPItransfer(byte value) {
  byte temp=0;
  //SPDR = value;
  temp =SPI.transfer(value);
  while(!(SPSR & (1<<SPIF)));


//  digitalWrite(ACK,LOW);
//  delay(1);
//  digitalWrite(ACK, HIGH);

  delay(10);
  return temp;
}
// The setup() function runs after reset.
void setup() {  ////////////////////////////////////////////////////////////////////////////////////////////////////////
  // Initialize serial for troubleshooting.
  Serial.begin(9600);
  SlaveInit();
  Serial.println("MC Initialized");

}
// The loop function runs continuously after setup().
void loop() {   ///////////////////////////////////////////////////////////////////////////////////////////////////
  // Slave Enabled?
  if (!digitalRead(SS)) {



      rx[0] = SPItransfer(0x00);
      //stat_upd(0x00,rx);
      rx[1] = SPItransfer(0x08);

      //stat_upd(0x08,rx);
      //Serial.println("It got here");
      //Serial.println("And here");

      rx[2] = SPItransfer(0x5a);
      //serial.println("it just doesn't want to transfer");
      //stat_upd(0x5a,rx);
      rx[3] = SPItransfer(0x5d);
      //stat_upd(0x5d,rx);
      rx[4] = SPItransfer(0x5c);
      //stat_upd(0x5c,rx);
      rx[5] = SPItransfer(0x5d);
      //stat_upd(0x5d,rx);
      rx[6] = SPItransfer(0x04);
      //stat_upd(0x04,rx);
      rx[7] = SPItransfer(0x00);
      //stat_upd(0x00,rx);
      rx[8] = SPItransfer(0x00);
      //stat_upd(0x00,rx);
      rx[9] = SPItransfer(0x80);
      //stat_upd(0x80,rx);
      Serial.println("Got to the end");

      for (int i=0;i<10;i++){
        Serial.print(rx[i], HEX);
        Serial.print(", ");
        }







  }


}