Logitech Bluetooth adapter added!

I was able to purchase the Logitech Bluetooth speaker adapter on Amazon through the goldbox deal; got it for $26 shipped! Tested it out, and it has great sound. I guess you get what you pay for...those chinese bluetooth streaming adapters are garbage.

I gutted the logitech and removed the 3 plugs off the motherboard (power, dual RCA, and 3.5mm). I then wired the 5v regulator from the BlueSaab board to the logitech for power, a ground wire, and then I spliced into the audio in wiring, keeping the BlueSaab board constantly connected to iPod input, but now there's a connector that attaches the logitech inputs. So basically I can disconnect the logitech board and it won't have any affect on the current capabilities/connections of the BlueSaab module.

This new board fits into the box I'm using; it's almost too perfect :)

The logitech has a button on it to initialize sync mode; So basically it works like this: if you have never connected a device to the logitech before, you HAVE to press this button to put it in sync mode. After you've synced a device to it, you never have to press that button again to connect the same device to it. If you want to connect a new device to the logitech, you'll have to pop the cover off and hit this sync button. I don't think I'll be syncing that many devices to the logitech, so I opted not to put a hole/button in the case housing just for this feature.

Peddling...

yeah, so if you feel compelled to send any moolah my way for this site's info, I'd appreciate it...and if not, that's cool too :-)

Parts list & notes

Some notes on the circuit board...In order to make the circuit board one layer (plus the one jumper), I removed any unused pins on the ICs...but I removed these pins on the SOCKETS, not the ICs. This makes removing/reinstalling ICs easy without having to modify them. Just pay attention to orientation :)

Also, if you don't want to pay for the DRV134PA drivers, you can actually request a sample of 1-3 of them from Texas Instruments for free! :D

Partlist
Exported from Seth Saab Interface PTH CU3242.brd at 2/26/2013 9:13:58 AM
EAGLE Version 6.4.0 Copyright (c) 1988-2013 CadSoft
Assembly variant:
Part	Value	Package	Library	Position	(mm)	Orientation
C1	470nF	C025-025X050	rcl	(49.25	19.25)	R0
C2	.1uF	C025-025X050	rcl	(50.5	12)	R90
C6	0.1uF	C025-025X050	rcl	(72.665	17.455)	MR270
C7	100nF	C025-025X050	rcl	(28.6	10.5)	MR270
C8	100nF	C025-025X050	rcl	(31.95	16.4)	MR270
C9	1uF	E2,5-5	resistor	(43.44	17.98)	MR0
C10	1uF	E2,5-5	resistor	(29.9	22.4)	MR0
C11	10uF	C025-030X050	rcl	(9.985	35.045)	MR180
C12	10uF	C025-030X050	rcl	(10.015	49.675)	MR0
C13	10uF	C025-030X050	rcl	(9.82	15.045)	MR180
C14	10uF	C025-030X050	rcl	(9.93	30.175)	MR0
C15	10uF	E2,5-5	resistor	(26	47.875)	MR180
C16	10uF	E2,5-5	resistor	(29.875	28.75)	MR0
C17	100nF	C025-025X050	rcl	(31.95	10.5)	MR270
C18	100nF	C025-025X050	rcl	(28.6	16.4)	MR270
C19	1uF	E2,5-5	resistor	(43.44	25.265)	MR0
C20	1uF	E2,5-5	resistor	(33.645	34.405)	MR0
CANBUS	1X02	pinhead	(25.395	56.215)	MR180
D1	1N4007-01	D01B	diodes	(54	19.125)	R0
FTDI	22-27-2061-06	6410-06	con-molex	(60.775	13.245)	MR0
GND	1X01	pinhead	(13.765	55.755)	MR0
IC1	SN65HVD251P	DIL08	ti-can-seth	(25.255	64.585)	MR180
IC2	MCP2515-E/P	DIL18	mcp2515-seth	(47.58	61.465)	MR180
IC3	MEGA8-P	DIL28-3-SETH	atmel-seth	(56.485	40.15)	MR0
IC4	7805	78XXS	v-reg	(53.965	22.605)	MR180
LED1	LED5MM	led	(70.75	50)	MR0
LED2	LED5MM	led	(70.75	58)	MR0
LED3	LED5MM	led	(61.25	30.25)	R180
L_IN	1X01	pinhead	(16.515	49.815)	MR0
L_OUT	1X02	pinhead	(4.8	42.045)	MR90
N1	LTC1144	DIP08L-SETH	ic-seth	(27.35	39.365)	MR180
PWR_IN	1X02	pinhead	(43.305	12.71)	MR0
R1	330R	0207/10	rcl	(60.25	50)	MR0
R2	10K	0207/10	rcl	(67.665	24.895)	MR180
R3	330R	0207/10	rcl	(63	53.5)	MR0
R4	10K	0207/2V	rcl	(38.5	53.5)	R180
R5	10K	0204/7	rcl	(18.125	64.625)	R90
R6	330R	0207/2V	rcl	(55.25	30.24)	R180
RX	1X01	pinhead	(62	18.75)	MR0
R_IN	1X01	pinhead	(16.45	31.315)	MR0
R_OUT	1X02	pinhead	(4.88	22.705)	MR90
TX	1X01	pinhead	(64.625	18.75)	R0
U$1	DRV134PA	DIL08	BurrBrownAudioParts	(12.555	42.19)	MR180
U$2	DRV134PA	DIL08	BurrBrownAudioParts	(12.47	22.69)	MR180
U$3	RESONATORPTH	RESONATOR-PTH	SparkFun-3-2-07	(47.25	31.875)	MR0
U$5	RESONATORPTH	RESONATOR-PTH	SparkFun-3-2-07	(52.75	70.25)	MR180

Wiring

I kinda forgot to update on my wiring...

This first diagram is how I have the connector wired where the original CD changer connector used to be. I have an 8-pin molex connector here now, just extra I had laying around. I think this connector is actually too small for the wiring in the car, but it's working so far. I would probably suggest a larger connector, with larger pins to accomodate the wire size better.

I decided to use an ethernet cable to make all the connections modular. One end of the ethernet cable goes to the front of the car, the other to the trunk. I cut off one end of the ethernet cable to make routing it easier, and then I crimped on a 5-pin Molex connector like the 8-pin above. I have an RJ45 receptacle that's wired to my iPod dock connector, which of course plugs into my iPod/iPhone.

I used the schematics here to determine what pins I needed off the iPod.

Inside the iPod connector, I put a 500K ohm resistor from 21 to ground to allow the iPod to accept serial communication so we can control the iPod, and I *THINK* I put a 10K ohm resistor from 5V in to both 25 and 27 (USB D+ and D-); this should put 2V on those pins, making the iPod draw 500mA to charge. Notice there is a switch inline with the power adapter, so I can turn off the charger at will (there's engine noise when the charger is on).

Also, I *MIGHT* have the iPod TX/RX lines swapped...I've gotten so confused with all the revisions of this damn thing that I think I might have them swapped. Not a big deal, it's easy to change them.

This schematic is a basic overview of the wiring involved from the iSaabAux board to the car and to the iPod. Not shown is the DB25 connectors I used to go from inside the case to the outside. You can use whatever you want of course, so that's not mandatory.

Newest hardware

Here are some pictures of my latest version of the iSaabAux input. I'm going to get an old female DB25 molded plug & replace this one without a housing, but this one works for now.

I cut a hole in the side of this enclosure for the 25 pin connector; it seemed like the best way to get all 18 wires outside the box.

Here are the schematic & board files (EagleCad) so you can make your own iSaabAux board.


Schematic
Board file

I'm going to use this enclosure, a Bud Industries CU-3242-MB.

Newest update

Ok, a lot's changed since my last update.

I've added some things, deleted some things, but everything is working better than before. The new code below incorporates iPod control via the steering wheel (next track, previous track, random & shuffle toggles), and cleaner code. I had attempted to get text to scroll across the SID, but I guess that was too much information because nothing would display at all. Maybe in a future update. I have the working code to make the SID scroll text on a work bench, but it doesn't operate the same way in the car; probably too many CAN messages or something.


// ----------------------------------------------
// SECUDUINO
// http://secuduino.blogspot.com/
// By Igor Real
// 16/05/2011
//
// Saab CDC Changer Emulator
// http://BlueSaab.blogspot.com/
// By Seth Evans
// 23 Jan 2013
// ----------------------------------------------

#include <CAN.h>

int cdbutton = 0;
int toggleshuffle = 1;
int CDCcmd[] = {
  0xE0,0x00,0x3F,0x31,0xFF,0xFF,0xFF,0xD0};
int playipod[] = {
  0xFF,0x55,0x04,0x02,0x00,0x00,0x01,0xF9};
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
  delay(2000);
}

void loop() {
  // 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 <= 800; i++) {
    if (CAN.CheckNew()) {
      CAN_TxMsg.data[0]++;
      CAN.ReadFromDevice(&CAN_RxMsg);
      //PrintBus();
      if (CAN_RxMsg.id==0x3C0) {
        if (CAN_RxMsg.data[0]==0x80) {
          switch (CAN_RxMsg.data[1]) {
          case 0x24:
            cdbutton = 1;
            //Serial.println("CDC");
            for (int j = 0; j < 9; j++) {
              Serial.write(byte(playipod[j]));
            }
            break;
          case 0x14:
            cdbutton = 0;  
            for (int j = 0; j < 9; j++) {
              Serial.write(byte(stopipod[j]));
            }
            //Serial.println("Radio");
            break;
          }
          delay(3);
          //Serial.println("Release");
          for (int i = 0; i < 8; 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 0x10:
              //Serial.println("Next");
              for (int j = 0; j < 8; j++) {
                Serial.write(byte(next[j]));
              }
              break;
            case 0x08:
              //Serial.println("Prev");
              for (int k = 0; k < 8; k++) {
                Serial.write(byte(prev[k]));
              }
              break;
            case 0x04:
              if (toggleshuffle > 3) {
                toggleshuffle = 1;
              }
              switch (toggleshuffle) {
              case 1:
                for (int j = 0; j < 10; j++) {
                  Serial.write(byte(repeat[j]));
                }
                break;
              case 2:
                for (int j = 0; j < 10; j++) {
                  Serial.write(byte(repeat[j]));
                }
                break;
              case 3:
                for (int j = 0; j < 10; j++) {
                  Serial.write(byte(repeat[j]));
                }
                for (int j = 0; j < 9; j++) {
                  Serial.write(byte(shuffle[j]));
                }
                break;
              }
              toggleshuffle++;
              break;
            }
            delay(3);
            //Serial.println("Release");
            for (int i = 0; i < 8; 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);
  /*CAN_TxMsg.id=0x3C8;     // CD Changer
   CAN_TxMsg.data[0]=0xE0;
   CAN_TxMsg.data[1]=0x00;
   CAN_TxMsg.data[2]=0x3F; // all 6 discs inserted
   CAN_TxMsg.data[3]=0x31; // playing , disc 1
   CAN_TxMsg.data[4]=0xFF;
   CAN_TxMsg.data[5]=0xFF;
   CAN_TxMsg.data[6]=0xFF;
   CAN_TxMsg.data[7]=0xD0; // married "OK" code
   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]=0x69; // i
  CAN_TxMsg.data[5]=0x53; // S
  CAN_TxMsg.data[6]=0x61; // a
  CAN_TxMsg.data[7]=0x61; // a
  CAN.send(&CAN_TxMsg);
  delay(10);

  CAN_TxMsg.data[0]=0x01; // message 1
  CAN_TxMsg.data[3]=0x62; // b
  CAN_TxMsg.data[4]=0x20; // _
  CAN_TxMsg.data[5]=0x41; // A
  CAN_TxMsg.data[6]=0x75; // u
  CAN_TxMsg.data[7]=0x78; // x
  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;
  CAN_TxMsg.data[1]=0x02; // Row 2
  CAN_TxMsg.data[2]=0x05;
  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 iPodOff() {
  // I don't think this code is needed at all...
  CAN_TxMsg.id=0x368;     // turn off the SID (SPA) text
  CAN_TxMsg.data[0]=0x02;
  CAN_TxMsg.data[1]=0x19;
  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==0x290) {
    Serial.print(CAN_RxMsg.id,HEX);
    Serial.print(";");
    for (int i = 0; i < 8; i++) {
      Serial.print(CAN_RxMsg.data[i],HEX);
      Serial.print(";");
    }
  }
}