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'PIC controlling Sony car cd'
1999\01\30@182119 by Matthew Ballinger

picon face
       I once had my steering wheel mounted cruise control switches fed to PIC
then
to the car stereo and the cruise control. I could control my cruise, volume
and track functions just by pushing both buttons at once to change function. I
wired the stereo inputs directly to the switches in the sony cd player. No big
deal. Now I have a detchable face head unit and would like to do the same
thing. Before I start reverse engineering the bus used between the face and
the main unit, I figured I  ask if anyone happens to know a bit about it.
Protocol? I2C? Parallel? Any feed back would be greatly appriaciated. Thank
you all.

'PIC controlling Sony car cd player?'
1999\01\31@123501 by Matthew Ballinger

picon face
In a message dated 1/30/99 6:19:19 PM Eastern Standard Time, MattBeck writes:

I once had my steering wheel mounted cruise control switches fed to PIC then
to the car stereo and the cruise control. I could control my cruise, volume
and track functions just by pushing both buttons at once to change function. I
wired the stereo inputs directly to the switches in the sony cd player. No big
deal. Now I have a detchable face head unit and would like to do the same
thing. Before I start reverse engineering the bus used between the face and
the main unit, I figured I  ask if anyone happens to know a bit about it.
Protocol? I2C? Parallel? Any feed back would be greatly appriaciated. Thank
you all.

1999\01\31@233409 by Matthew Ballinger

picon face
       Once again I'll post this. I keep getting back PICLIST postings saying t
hat
this or something like it has already been posted and to add a sentence or 2
to change the content. I don't think so but, have I already posted this?
       I once had my steering wheel mounted cruise control switches fed to PIC
then
to the car stereo and the cruise control. I could control my cruise, volume
and track functions just by pushing both buttons at once to change function. I
wired the stereo inputs directly to the switches in the sony cd player. No big
deal. Now I have a detchable face head unit and would like to do the same
thing. Before I start reverse engineering the bus used between the face and
the main unit, I figured I  ask if anyone happens to know a bit about it.
Protocol? I2C? Parallel? Any feed back would be greatly appriaciated. Thank
you all.


'PIC controlling Sony car CD'
1999\02\01@051016 by paulb
flavicon
face
Matthew Ballinger wrote:

> Once again I'll post this.

 Not necessarily a good idea considering your following sentence!
Repeat postings are dimly viewed by many.

> I keep getting back PICLIST postings saying that this or something
> like it has already been posted

 OK, it's telling you it *was* posted!  We've all seen it.  And if you
read the list, you will note reports of the present "echo" problem.

> and to add a sentence or 2 to change the content.

 Perhaps it shouldn't say that!  Oh dear!  You have to be careful what
you write in "help" messsages.  Unless, of course, you happen to work
for M$.

> I don't think so but, have I already posted this?

 You don't think so?  You are re-sending it but don't remember
sending it before?  You bet you have.  At least once.  Can't say - I
deleted them all.

> I once had my steering wheel mounted cruise control switches fed to
...
> I figured I ask if anyone happens to know a bit about it.

 It appears no-one does, thus the stony silence.  There is no-one on
the list (obviously) to tell you "No, no-one has an answer for you".

 Don't entirely give up hope for two reasons - firstly, some people
read the list quite infrequently but may have information.  Secondly,
some may have information which they have to dig out - may take a while.
I sometimes reply to a message weeks later FWIW.  However I have *no*
ideas about Sony steering wheels.
--
 Cheers,
       Paul B.

'PIC controlling Sony car cd player?'
1999\02\01@104624 by Yura Galayda

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face
In previous message, Matthew Ballinger said:
> In a message dated 1/30/99 6:19:19 PM Eastern Standard Time, MattBeck writes:
>  I once had my steering wheel mounted cruise control switches fed to PIC then
> to the car stereo and the cruise control. I could control my cruise, volume
> and track functions just by pushing both buttons at once to change function. I
> wired the stereo inputs directly to the switches in the sony cd player. No big
> deal. Now I have a detchable face head unit and would like to do the same
> thing. Before I start reverse engineering the bus used between the face and
> the main unit, I figured I  ask if anyone happens to know a bit about it.
> Protocol? I2C? Parallel? Any feed back would be greatly appriaciated. Thank
> you all.

Sony Rotary Commander (RM-X25) this just 11 switches with resistors:

   15.2K   10K     6.8K    4.7K    3.3K    2.2K    2.2K    2.2K    2.2K  AD
   ___     ___     ___     ___     ___     ___     ___     ___     ___   out
 -|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+->
|       |       |       |       |       |       |       |       |       |
\       \       \       \       \       \       \       \       \       \
|       |       |       |       |       |       |       |       |       |
+-------+-------+-------+-------+-------+-------+-------+-------+-------+
                                                                       _|_

--
------------
Yuri Galayda at SIC Vector R&D Department       spam_OUTyuraTakeThisOuTspamvector.kharkov.ua
PGP public key available  --  finger .....yuraKILLspamspam@spam@vector.kharkov.ua | pgp -kaf

1999\02\01@125227 by Bob Blick

face
flavicon
face
Manufacturers of consumer electronics don't seem to be the most
DIY-friendly bunch. I have a feeling you'll have to figure the protocol
out yourself. I gave up trying to get info on the Pioneer "P-bus". If I
had a changer to go with my changer-control deck I'd give a shot at
figuring it out, but as it is, people like us are not important to Sony
and Pioneer. You'd think that a good service manual would contain that
information, but service manuals have gotten pretty slim.

I once complained to NEC about the lack of real information in service
manuals. The answer I got(perhaps more frank than poilically correct) was
that the company did not think there was anyone in the U.S. smart enough
to need that much information.

Cheers,
Bob

1999\02\02@084709 by Yura Galayda

flavicon
face
In previous message, Matthew Ballinger said:
> In a message dated 1/30/99 6:19:19 PM Eastern Standard Time, MattBeck writes:
>  I once had my steering wheel mounted cruise control switches fed to PIC then
> to the car stereo and the cruise control. I could control my cruise, volume
> and track functions just by pushing both buttons at once to change function. I
> wired the stereo inputs directly to the switches in the sony cd player. No big
> deal. Now I have a detchable face head unit and would like to do the same
> thing. Before I start reverse engineering the bus used between the face and
> the main unit, I figured I  ask if anyone happens to know a bit about it.
> Protocol? I2C? Parallel? Any feed back would be greatly appriaciated. Thank
> you all.

Sony Rotary Commander (RM-X25) this just 11 switches with resistors:

   15.2K   10K     6.8K    4.7K    3.3K    2.2K    2.2K    2.2K    2.2K  AD
   ___     ___     ___     ___     ___     ___     ___     ___     ___   out
 -|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+-|___|-+->
|       |       |       |       |       |       |       |       |       |
\       \       \       \       \       \       \       \       \       \
|       |       |       |       |       |       |       |       |       |
+-------+-------+-------+-------+-------+-------+-------+-------+-------+
                                                                       _|_

--
------------
Yuri Galayda at SIC Vector R&D Department       yuraspamKILLspamvector.kharkov.ua
PGP public key available  --  finger .....yuraKILLspamspam.....vector.kharkov.ua | pgp -kaf


'PIC controlling Sony car CD'
1999\06\04@203705 by Matthew Ballinger
picon face
In a message dated 6/4/99 6:09:22 PM Eastern Daylight Time,
EraseMEadolfusspam_OUTspamTakeThisOuTsofthome.net writes:

{Quote hidden}

       Actually it was much easier than expected to interface with. After
inspection of the face, I realized that all the buttons did when pushed is
put some value of resistance in between 1 of the 5 or 6 conacts on the face
connector and ground. Using my multimeter I just found the connections and
resistance value of each button I would use. I then soldered small wires the
PC board side of the main head unit connector contacts and used a pot to
insert the right amount of resistance and a 4066 bilateral switch fed by the
PIC to do the switching. It worked great. Good Luck! Matt

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