Saab CD Changer Bluetooth Auxiliary Input: March 2014

I get a lot of emails from people on how to build one of these things so here are directions. This involves soldering through-hole components and uploading code to the microprocessor with Arduino.

Buy the parts here (~$40) or anywhere else you find similar stuff:
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=89c9334eae

If something is out of stock, you'll either have to wait for more to be ordered or delete it from your cart and buy a suitable substitute. i.e., sometimes the atmega328p is out of stock so I order the atmega328.

If you don't want to buy the blank atmega328 chip, you can pay extra for a 328 with a bootloader preinstalled ($5):

http://www.mouser.com/ProductDetail/Arduino/A000048/?qs=sGAEpiMZZMs0PWRNvpRp0N8bFGqoofv%2f

https://www.sparkfun.com/products/10524

Buy one of these ($5):

http://www.ebay.com/sch/i.html?_odkw=3.5mm+stereo+cable&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.X3.5mm+stereo+cable+25ft&_nkw=3.5mm+stereo+cable+25ft&_sacat=0

Buy a CD changer connector ($7/ea, minimum 2, plus S/H: ~$20):

http://connectorpeople.com/Connector/TYCO-AMP-TE_CONNECTIVITY/8/827229-1

Order the PCB (minimum quantity 3, for $30 shipped):

http://oshpark.com/shared_projects/uMyNRBbZ

It takes about 3 weeks for them to get fabbed and shipped.

You'll also need/want 4 screws to hold the PCB to the enclosure; I use 4, 5/16" panhead screws.

I also secure the CD changer connector to the PCB with 1/2" long 4/40 panhead screws and 4/40 locknuts.

flash the bootloader if necessary (I'm not going to cover how to do that here; google it)
Assemble the PCB
Wire up the 3.5mm jack to the PCB with ~5" of wire for each pole
Cut a hole in the enclosure for the CD changer connector and a 1/4" hole for the panel-mount 3.5mm jack.
upload the code with an FTDI adapter/cable
plug it into the cd changer harness (using the adapter cable, if necessary for 9-5 people)
route the 3.5mm cable from the module to the front of the car under the carpet/door sills

You'll probably have to contact me regarding flashing the code...just FYI ;)

To get to the aux in on the head unit, hit the CD button twice. If you have a tape player and cd player (9-5 people), hit CD 3 times. You can also hit SRC button on the steering wheel to cycle.

With the minimum quantity orders for some of these items, it's probably a good idea to get together with another Saab buddy and just build 2 or 3 of them.

// ----------------------------------------------
// SECUDUINO
// http://secuduino.blogspot.com/
// By Igor Real
// 16/05/2011
//
// Saab CDC Changer Emulator
// http://BlueSaab.blogspot.com/
// By Seth Evans
// 29 July 2013
// 19 Feb 2014 - added name, sid text, date to output
// ----------------------------------------------

#include <CAN.h>

int cdbutton = 0;
int toggleshuffle = 1;
int mute = 0;
int CDCcmd[] = {
0xE0,0x00,0x3F,0x31,0xFF,0xFF,0xFF,0xD0};
// first byte needs to be 32 otherwise 2004 9-5 will throw airbag light; it was 0x62
int ninefivecmd[] = {
0x32,0x00,0x00,0x16,0x01,0x02,0x00,0x00};
int beep[] = {
0x80,0x04,0x00,0x00,0x00,0x00,0x00,0x00};
int playipod[] = {
0xFF,0x55,0x04,0x02,0x00,0x00,0x01,0xF9};
int playpauseipod[] = {
0xFF,0x55,0x03,0x02,0x00,0x01,0xFA};
int stopipod[] = {
0xFF,0x55,0x04,0x02,0x00,0x00,0x02,0xF8};
int next[] = {
0xFF,0x55,0x03,0x02,0x00,0x08,0xF3};
int prev[] = {
0xFF,0x55,0x03,0x02,0x00,0x10,0xEB};
int shuffle[] = {
0xFF,0x55,0x04,0x02,0x00,0x00,0x80,0x7A};
int repeat[] = {
0xFF,0x55,0x05,0x02,0x00,0x00,0x00,0x01,0xF8};
int buttonRelease[] = {
0xFF,0x55,0x03,0x02,0x00,0x00,0xFB};

void setup() {
// set up CAN
CAN.begin(47); // Saab I-Bus is 47.619kbps
Serial.begin(9600);
//cdbutton = 0;
//toggleshuffle = 1;
CAN_TxMsg.header.rtr=0; // this value never changes
CAN_TxMsg.header.length=8; // this value never changes
// not sure if this is needed; pauses program before it loops
Serial.println("9-5 Test Code 2");
Serial.println("Seth Evans - 'Aux In'");
Serial.println("19 Feb 2014");
delay(2000);
}

void loop() {
//cdbutton = 1;
//PrintBus();
// CDC code needs sent every second or less so all loops
// running added together need to take less than 1000ms
// but no more or the car won't "see" the CDC
CDC();
for (int i = 0; i <= 860; i++) {
if (CAN.CheckNew()) {
CAN_TxMsg.data[0]++;
CAN.ReadFromDevice(&CAN_RxMsg);
//PrintBus();
if (CAN_RxMsg.id==0x6A1) {
CAN_TxMsg.id=0x6A2; // CD Changer
for (int c = 0; c < 8; c++) {
CAN_TxMsg.data[c]=ninefivecmd[c];
}
CAN.send(&CAN_TxMsg);
}

if (CAN_RxMsg.id==0x3C0) {
if (CAN_RxMsg.data[0]==0x80) {
switch (CAN_RxMsg.data[1]) {
case 0x24:
cdbutton = 1;
for (int j = 0; j < 8; j++) {
CAN_TxMsg.id=0x430;
CAN_TxMsg.data[j]=beep[j];
}
CAN.send(&CAN_TxMsg);
for (int j = 0; j < 8; j++) {
Serial.write(byte(playipod[j]));
}
delay(3);
//Serial.println("Release");
for (int i = 0; i < 7; i++) {
Serial.write(byte(buttonRelease[i]));
}
break;
case 0x14:
cdbutton = 0;
for (int a = 0; a <=2; a++) {
for (int j = 0; j < 8; j++) {
CAN_TxMsg.id=0x430;
CAN_TxMsg.data[j]=beep[j];
}
CAN.send(&CAN_TxMsg);
}
for (int j = 0; j < 8; j++) {
Serial.write(byte(stopipod[j]));
}
delay(3);
//Serial.println("Release");
for (int i = 0; i < 7; i++) {
Serial.write(byte(buttonRelease[i]));
}
//Serial.println("Radio");
break;
}
if (cdbutton == 1) {
switch (CAN_RxMsg.data[1]) {
case 0x59: // NXT button signal
for (int j = 0; j < 7; j++) {
Serial.write(byte(playpauseipod[j]));
}
break;
case 0x76: // Long press of CD/RDM button
if (toggleshuffle > 3) {
toggleshuffle = 1;
}
switch (toggleshuffle) {
case 1:
for (int j = 0; j < 9; j++) {
Serial.write(byte(repeat[j]));
}
break;
case 2:
for (int j = 0; j < 9; j++) {
Serial.write(byte(repeat[j]));
}
break;
case 3:
for (int j = 0; j < 9; j++) {
Serial.write(byte(repeat[j]));
}
for (int j = 0; j < 8; j++) {
Serial.write(byte(shuffle[j]));
}
break;
}
toggleshuffle++;
//break;
case 0xB1: // Audio mute on?
for (int j = 0; j < 8; j++) {
Serial.write(byte(stopipod[j]));
}
break;
case 0xB0: // Audio mute off?
for (int j = 0; j < 8; j++) {
Serial.write(byte(playipod[j]));
}
break;
case 0x35: // Seek next (Seek+)?
for (int j = 0; j < 7; j++) {
Serial.write(byte(next[j]));
}
break;
case 0x36: // Seek previous (Seek-)?
for (int j = 0; j < 7; j++) {
Serial.write(byte(prev[j]));
}
break;
}
delay(3);
//Serial.println("Release");
for (int i = 0; i < 7; i++) {
Serial.write(byte(buttonRelease[i]));
}
}
}
}
if (CAN_RxMsg.id==0x290) {
if (CAN_RxMsg.data[0]==0x80) {
if (cdbutton == 1) {
switch (CAN_RxMsg.data[2]) {
//case 0x04: // NXT button on wheel
//for (int j = 0; j < 9; j++) {
//Serial.write(byte(repeat[j]));
//}
//break;
case 0x10: // Seek+ button on wheel
//Serial.println("Next");
for (int j = 0; j < 7; j++) {
Serial.write(byte(next[j]));
}
break;
case 0x08: // Seek- button on wheel
//Serial.println("Prev");
for (int k = 0; k < 7; k++) {
Serial.write(byte(prev[k]));
}
break;
}
delay(3);
//Serial.println("Release");
for (int i = 0; i < 7; i++) {
Serial.write(byte(buttonRelease[i]));
}
}
}
}
}
delay(1);
}
if (cdbutton==1) {
//Serial.println("iPod ON");
iPodOn();
}
else {
//Serial.println("iPod OFF");
//iPodOff();
//delay(400);
}
}

void CDC() {
CAN_TxMsg.id=0x3C8; // CD Changer
for (int c = 0; c < 8; c++) {
CAN_TxMsg.data[c]=CDCcmd[c];
}
CAN.send(&CAN_TxMsg);
}

void iPodOn() {
// This loop takes 50ms
CAN_TxMsg.id=0x328; // SID audio text
CAN_TxMsg.data[0]=0x42; // message 2
CAN_TxMsg.data[1]=0x96;
CAN_TxMsg.data[2]=0x02; // Row 2
CAN_TxMsg.data[3]=0x20; // _
CAN_TxMsg.data[4]=0x20; // _
CAN_TxMsg.data[5]=0x20; // _
CAN_TxMsg.data[6]=0x41; // A
CAN_TxMsg.data[7]=0x75; // u
CAN.send(&CAN_TxMsg);
delay(10);

CAN_TxMsg.data[0]=0x01; // message 1
CAN_TxMsg.data[3]=0x78; // x
CAN_TxMsg.data[4]=0x20; // _
CAN_TxMsg.data[5]=0x49; // I
CAN_TxMsg.data[6]=0x6E; // n
CAN_TxMsg.data[7]=0x20; // _
CAN.send(&CAN_TxMsg);
delay(10);

CAN_TxMsg.data[0]=0x00; // message 0
CAN_TxMsg.data[3]=0x20; // _
CAN_TxMsg.data[4]=0x20; // _
CAN_TxMsg.data[5]=0x20; //
CAN_TxMsg.data[6]=0x20; //
CAN_TxMsg.data[7]=0x20; //
CAN.send(&CAN_TxMsg);
delay(10);

CAN_TxMsg.id=0x348; // audio text control
CAN_TxMsg.data[0]=0x11; // 11
CAN_TxMsg.data[1]=0x02; // Row 2?
CAN_TxMsg.data[2]=0x05; // 05
CAN_TxMsg.data[3]=0x18; // priority 18?
CAN_TxMsg.data[4]=0x00;
CAN_TxMsg.data[5]=0x00;
CAN_TxMsg.data[6]=0x00;
CAN_TxMsg.data[7]=0x00;
CAN.send(&CAN_TxMsg);
delay(10);

/*CAN_TxMsg.id=0x368; // SID text priority
CAN_TxMsg.data[0]=0x02; // Row 2
CAN_TxMsg.data[1]=0x18; // priority 18?
CAN_TxMsg.data[2]=0x00;
CAN_TxMsg.data[3]=0x00;
CAN_TxMsg.data[4]=0x00;
CAN_TxMsg.data[5]=0x00;
CAN_TxMsg.data[6]=0x00;
CAN_TxMsg.data[7]=0x00;
CAN.send(&CAN_TxMsg);
delay(10);
*/
}

void PrintBus() {
if (CAN_RxMsg.id==0x6A2) {
//if (CAN_RxMsg.data[0]==0x80) {
Serial.print(CAN_RxMsg.id,HEX);
Serial.print(";");
for (int i = 0; i < 8; i++) {
Serial.print(CAN_RxMsg.data[i],HEX);
Serial.print(";");
}
Serial.println("");
}
}

Saab CD Changer Bluetooth Auxiliary Input

Sunday, March 2, 2014

How to build your own 3.5mm version of BlueSaab

Newest version of code