vwcdavr nano v3, cd changer emulator

vwcdavr nano v3

// Copyright http://www.audi-a6.com.ua/viewtopic.php?f=30&t=5557&start=20#p127185
// Tested with Arduino Nano v3 Atmega328p
// Head unit tested: Skoda Symphony CD
// Connect pin 11 with DataIn
//         pin 13 with Clock
//         Gnd to Gnd
//         no need to connect DataOut unless you need advanced features



// Активация линейного входа на Audi Concert
// Подключение Магнитола/Arduino
// DataIn (13) - Arduino 11
// Clock (15) - Arduino 13
// CDC Pilot Line (17) - Arduino VCC
// Дополнительно необходимо соеденить массу магнитолы с разъемом GND Arduino

#include <SPI.h>

void send_package(uint8_t c0, uint8_t c1, uint8_t c2, uint8_t c3, uint8_t c4, uint8_t c5, uint8_t c6, uint8_t c7);


void setup() {
  // put your setup code here, to run once:
  SPI.begin();
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode(SPI_MODE1);
  SPI.setClockDivider(SPI_CLOCK_DIV128); //62.5kHz@8Mhz 125kHz@16MHz

  send_package(0x34,0xBE,0xFE,0xFF,0xFF,0xFF,0xFA,0x3C); //load disc
  delay(1000);
  send_package(0x74,0xBE,0xFE,0xFF,0xFF,0xFF,0x8F,0x7C); //idle
  delay(100);
}

void loop() {
  // put your main code here, to run repeatedly:
  send_package(0x74,0xBE,0xFE,0xFF,0xFF,0xFF,0x8F,0x7C);
  delay(500);
}

void send_package(uint8_t c0, uint8_t c1, uint8_t c2, uint8_t c3, uint8_t c4, uint8_t c5, uint8_t c6, uint8_t c7)
{
SPI.transfer(0x34);
delayMicroseconds(750);
SPI.transfer(c1);
delayMicroseconds(750);
SPI.transfer(c2);
delayMicroseconds(750);
SPI.transfer(c3);
delayMicroseconds(750);
SPI.transfer(c4);
delayMicroseconds(750);
SPI.transfer(c5);
delayMicroseconds(750);
SPI.transfer(0xCF);
delayMicroseconds(750);
SPI.transfer(c7);
}