[arm-allstar] TK8180 FOB interfacing

[Doug Crompton]

From: Kevin Halton <khalton at cox.net>


So I've been trying to build an allstar node for some time now. I only get
20-30 minutes at a time to work on it. That said, I've tried 2 different
USB interfaces and I still can't seem to get the damn thing to work.



I'm currently using a TK-8180 as the radio because it has a 25 pin
accessory connector on the back which should (theoretically) make things
easy. If I can get that to work I have lots of ideas for interfacing other
radios and I'm more than willing to futz around with usb fobs.



Anyway, here's a diagram of the pinout for the radio from the service
manual (7180 is the same as 8180):

[image: image.png]



I've tried connecting to this radio using a USB-Rim Lite
<http://www.repeater-builder.com/products/usb-rim-lite.html> and a Radio
Farm Projects VOIP CM119B Interface
<https://sites.google.com/site/radiofarmprojects/home/voip-interface>.



The RIM Lite doesn't appear to pull down the PTT I/O enough to stay keyed
and I can't seem to get any audio in or out of it (using SimpleUSB Tune).



The CM119B Interface seems to do a fine job doing PTT but again, no audio
in or out as far as I can tell.



I'm using these pins on the radio:

5 - DI - Data Input

7 - Ground

12 - IO7 - Configured for COS

13 - IO6 - Configured for PTT

19 - DEO - Discriminator External Output



Any ideas as to where I'm going wrong? Any feedback is appreciated
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