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Making my own USB cable to interface to a JP1.1 remote.

 
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carsonlittle



Joined: 02 Dec 2012
Posts: 62

PostPosted: Sat Dec 08, 2012 5:07 pm    Post subject: Making my own USB cable to interface to a JP1.1 remote. Reply with quote

I have a few Atlas 1047's, which I believe are JP1.1 remotes.

I have plans to come up with a combo device (http://www.hifi-remote.com/forums/viewtopic.php?p=107186#107186) and that requires me to understand how the tools we use work.

I believe a good warm up exercise would be to start off by building my own cable!

Referring to the "Schematic of JP1X interface" (last page of "New Interface Designs.pdf" hosted in http://www.hifi-remote.com/forums/dload.php?action=file&file_id=5975), I see that the RS232 signals have been inverted through open drain not gates and then connected to the remote's controller.

The RS232 signals by design "comes out" inverted in polarity though, so if I were to use a USB<->Serial cable, would I need to have the open drain not gates betwwen the cable and the remote as well?

This USB<->Serial cable talks 5v and 3v3 though - not RS232 levels.

The USB<->Serial cable I intend to use is like the one described here: http://jimlaurwilliams.org/wordpress/?p=999
More specifically:

If my understanding is correct, all I would have to do is connect the pins from this adapter to the 2x3 pin port of my remote, with my remote powered on, without the need of the intermediate gates?
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Kevin Timmerman
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Joined: 09 Jan 2007
Posts: 142
Location: West Michigan

PostPosted: Sat Dec 08, 2012 7:16 pm    Post subject: Reply with quote

I don't think anyone has had success with the CP2101/CP2102

The CP2101 doesn't support break. The CP2102 does, but is seems to be broken.

http://www.hifi-remote.com/forums/viewtopic.php?p=104933#104933
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carsonlittle



Joined: 02 Dec 2012
Posts: 62

PostPosted: Wed Dec 12, 2012 11:59 am    Post subject: Reply with quote

Kevin Timmerman wrote:
I don't think anyone has had success with the CP2101/CP2102

The CP2101 doesn't support break. The CP2102 does, but is seems to be broken.

http://www.hifi-remote.com/forums/viewtopic.php?p=104933#104933


Do you remember which OS and CP2102 driver you were using when generating those graphs?
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