M-Bus CD changer adapter for car pc integration - Page 19

jbors · 09-21-2005, 02:39 AM

Well, I can only guess that if it uses 8pin round connector for CD changer it might be compatible. I see that Accord 1998-2001 may be having MBus. Cannot guarantee though.

rufus · 09-21-2005, 04:12 AM

quick question...so the adapter for sale on your website is the finish product and works ? Is anybody using it already ? i just saw this thread and i am interested in the adapter.thx

saintx · 09-21-2005, 11:05 AM

jbors - i know you cant really give an estimate time on when the next adapter will be available, but do you know which one you will be doing? The IP-Bus, MOST, or Honda/Nissan/Toyota(<-- this did get the most votes

)?

ScrapMaker · 09-21-2005, 01:40 PM

I'd bet the MOST adapter, since he feels that's where the money is...

but my heart is set on the IP-BUS adapter...

I may just have to buy a different headunit...

saintx · 09-21-2005, 02:13 PM

I just want to know so that if need be, i can buy the adapter for my car to go from stock to M-Bus, then from M-Bus i can go to PC. I would rather have it all in one adpater.

jbors · 09-21-2005, 03:05 PM

Quote: Originally Posted by saintx

I just want to know so that if need be, i can buy the adapter for my car to go from stock to M-Bus, then from M-Bus i can go to PC. I would rather have it all in one adpater.

It is valid when such adapter exists...
In some cases you can buy stock->MBus very cheap on ebay. I saw some deals for $0.99

msaribowo · 10-13-2005, 09:47 PM

I am sorry, a little bit changed from the MAIN Topic...

Please Help: Radio/Casette Alpine TDM-7532 M-BUS convert to RCA [I][U]?

I Needs to convert the Alpine Head Unit TDM-7532, M-Bus CD Changer input to RCA for my Ipod, IN THE CHEAPEST WAY !!

The Alpine HU TDM-7532 installed at My Toyota, Type: Kijang 1999.

As I read the manual, there is no facility for AUX, there are only 3 button: Tuner, Tape and CD...thats all.

If somebody help/gave me a diagram to convert M-BUS to RCA, I am also asking how to switch to the "AUX" for my Ipod, or it will "automatically" detect after M-BUS converted to RCA as CD Changer facility?....
Please.... help me?....

I am very eager to connect my Ipod Mini 4Gb to the my 2nd car Alpine TDM-7532 Audio Systems, because in my country, Indonesia, South East Asia, there is no Alpine M-BUS to RCA converter.
I am very appreciate your reply to my email: aribowo@mtp.co.id.

Thank you very much,
M.S.Aribowo
JAKARTA - Indonesia, the greatest archipelago, and Bali is one of our thousands islands

jbors · 10-13-2005, 10:27 PM

I have bare board that will emulate CD changer and allow you to use iPod on AUX mode.
Board is $40. PM me for details.

coucouillu · 10-14-2005, 04:11 AM

Can't wait anymore for IP-BUS adaptator? I think I will spend my money and my time tryind to do it myself. It will make for me better wait.

jbors · 10-14-2005, 11:20 AM

Quote: Originally Posted by coucouillu

Can't wait anymore for IP-BUS adaptator? I think I will spend my money and my time tryind to do it myself. It will make for me better wait.

Sounds like a great project ! Good luck

palta · 10-18-2005, 01:42 PM

Quote: Originally Posted by ScrapMaker

I'd bet the MOST adapter, since he feels that's where the money is...

but my heart is set on the IP-BUS adapter...

I may just have to buy a different headunit...

I do not think a MOST adapter is very feasable. It is not easy to interface to an optical network and I'm not sure people driving those fat BMWs and mercedeses are the people who will add a custom made device to their car.
However jbors, if do decide you are going to make an interface and if you need any help pm me because I do have quite a lot of experience with MOST.

BTW personally I want to know more about the bus used by Toyota.

Patrick

slarty · 10-20-2005, 04:29 PM

I'd like to see this i have a volvo v50 do you know how hard a job it woul be?

Quote: Originally Posted by palta

I do not think a MOST adapter is very feasable. It is not easy to interface to an optical network and I'm not sure people driving those fat BMWs and mercedeses are the people who will add a custom made device to their car.
However jbors, if do decide you are going to make an interface and if you need any help pm me because I do have quite a lot of experience with MOST.

BTW personally I want to know more about the bus used by Toyota.

Patrick

palta · 10-22-2005, 05:48 AM

Quote: Originally Posted by slarty

I'd like to see this i have a volvo v50 do you know how hard a job it woul be?

It will be dificult and a lot of work.

First of all you need connector with a builtin optical to electrical convertor. This is not something you can make yourself because the transmittor and receiver need to be properly alligned (it is not so critical as glass fiber but still). Futhermore the sender must not transmit to much light and the receiver must sensitive enough.
Then you need to decode the datastream which is 25 MBit (biphase coded) containing up to 60 audio channels (44.1 khz 8 bit) or 15 audio channels (44.1 16 bit stereo), it can also contain async data (but that is probably not used in a car system) and control messages. You need to decode but this is not possible with a simple ucontroller/PC. People are busy making FPGA implementation but I do not know how far they are. Best is probably buying some IC which is able to do this. There are standalone transceivers and micrcontrollers with builtin MOST, DSP, uC, ADC/DAC (the original designer of MOST Oasis makes these part, but othe companies are also busy). I do not know it is possible to get single parts of these components.
You also need to make software to commicate with your radio. This is possible as the specification of the protocol is standard and can be found on the internet. This will take time but not impossible.
Some warning is in place: MOST is a bus system so you have to take care that your device behaves properly (especially on a hardware level) because it is possible the desturb the ring. It is however not very easy to break the other components permenantly.

Feel free if you want more details.

Patrick

slarty · 10-22-2005, 03:18 PM

Hi Palta

Thanks for this

It was the disruption of the ring that was my concern when reading Volvo's technical specs and dependencies on the system. I figured if this was not done 100% it may impact on other systems including the maintenance system I read about that goes round checking the components of the BUS. Would this be the case?

My concern is that any non Volvo specified component that may effect the other components on the system would be recorded and effect the warranty of the vehicle. Does this seem feasible?

I know that there is an iPOD interface coming soon to the UK and this is available in the US. My other thought was to get a PC to emulate the iPOD interface and connect into the Volvo iPOD interface similar to other ideas put forward on this thread.

Quote: Originally Posted by palta

It will be dificult and a lot of work.

First of all you need connector with a builtin optical to electrical convertor. This is not something you can make yourself because the transmittor and receiver need to be properly alligned (it is not so critical as glass fiber but still). Futhermore the sender must not transmit to much light and the receiver must sensitive enough.
Then you need to decode the datastream which is 25 MBit (biphase coded) containing up to 60 audio channels (44.1 khz 8 bit) or 15 audio channels (44.1 16 bit stereo), it can also contain async data (but that is probably not used in a car system) and control messages. You need to decode but this is not possible with a simple ucontroller/PC. People are busy making FPGA implementation but I do not know how far they are. Best is probably buying some IC which is able to do this. There are standalone transceivers and micrcontrollers with builtin MOST, DSP, uC, ADC/DAC (the original designer of MOST Oasis makes these part, but othe companies are also busy). I do not know it is possible to get single parts of these components.
You also need to make software to commicate with your radio. This is possible as the specification of the protocol is standard and can be found on the internet. This will take time but not impossible.
Some warning is in place: MOST is a bus system so you have to take care that your device behaves properly (especially on a hardware level) because it is possible the desturb the ring. It is however not very easy to break the other components permenantly.

Feel free if you want more details.

Patrick

palta · 10-24-2005, 02:49 AM

Hello,
If the hardware you use is ok and the software you use doesnot behave too bad (like sending too much messages) the other component will work ok. If your hardware is not ok it is possible to influence the other components because it breaks the ring. There should be no critical systems on the bust (like ABS) only multimedia components. I'm not sure what you mean with maintenance system. The MOST master will check the bus if it gets desturbed to check where the ring broke but if you added a new component it should just use it.

In the MOST function catalog there are functions available that give you the data of the manufacturer of a device (but that you have to implement yourself ofcourse). So they could record the connection of other devices. MOST is designed to be a standard so you should be able to connect other devices. I do not think you can void the warrenty of your vehicle by connecting something to your audio system (that is illegal). Futhermore you cannot break devices by connecting something in the optical ring only desturb it during the time the device is connected.

With respect to the ipod interface you can find the information here:
http://www.oasis.de/files/Newsletter...r_V_I-2005.pdf
As you can read in the newsletter the reference design is free of royalties but I do not think Oasis would like single users to contact them. Futhermore you still need the components I mentioned in an earlier post.
Oasis also has MOST PC-cards but I do not really remember the price (I think it is more than 500 Euro).

Patrick

Quote: Originally Posted by slarty

Hi Palta

Thanks for this

It was the disruption of the ring that was my concern when reading Volvo's technical specs and dependencies on the system. I figured if this was not done 100% it may impact on other systems including the maintenance system I read about that goes round checking the components of the BUS. Would this be the case?

My concern is that any non Volvo specified component that may effect the other components on the system would be recorded and effect the warranty of the vehicle. Does this seem feasible?

I know that there is an iPOD interface coming soon to the UK and this is available in the US. My other thought was to get a PC to emulate the iPOD interface and connect into the Volvo iPOD interface similar to other ideas put forward on this thread.

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