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Alpine touchscreen proto?

 
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Billy



Joined: 17 Jun 2009
Posts: 4
PostPosted: Wed Jun 17, 2009 1:49 pm    Post subject: Alpine touchscreen proto? Reply with quote
Hi there. I'm now a proud owner of an IVA-W502 from Alpine. After a hour of google I have figured out how to feed RGBs signals from the CarPC into its Nav socket (and can share all the links). However the touchscreen has been described NOWHERE, and I have no idea what it is: RS232, PWM, or something proprietary.
Tomorrow I'll have some oscillograms of this output but... before I start inventing the wheel I'd ask first. Maybe somebody knows?..

Thanks!
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Billy



Joined: 17 Jun 2009
Posts: 4
PostPosted: Mon Jun 22, 2009 12:11 pm    Post subject: Reply with quote
Well.

The pin is at +12v and looks pretty much as open collector; having pulled it down to zero via 10k resistor, I see some tens millivolts 3-level signal when touching the panel. That must not be right... looking for a proper condition to test it again. Ideas???
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