The code hangs at this line, so the mutex is opened.
port_data[port].channel = open(port_data[port].device_name, O_RDWR|O_NOCTTY);

Jason, I think its in KISS.  Regarding the readable payload with binary 
garbage, I'm getting it.  Here's some of what putty sees, so I think the baud 
rate is good too.
KC3OBB-1>APT314,WIDE1-1,WIDE2-1:>MT-Omega v1.47
KC3OBB-1>APT314,WIDE1-1,WIDE2-1:$GPRMC,190857,A,4015.8900,N,07946.0796,W,000,057,080221,,*03/TT3
 ROCKET|!"#c'6|!w!x!
KC3OBB-1>APT314,WIDE1-1,WIDE2-1:$GPRMC,190958,A,4015.8927,N,07946.0753,W,000,169,080221,,*0D|!##c':|!w:Q!
KC3OBB-1>APT314,WIDE1-1,WIDE2-1:$GPRMC,191059,A,4015.8942,N,07946.0762,W,000,169,080221,,*05|!$#c'<|!wGY!
KC3OBB-1>APT314,WIDE1-1,WIDE2-1:$GPRMC,191159,A,4015.8922,N,07946.0766,W,000,169,080221,,*06|!%#c'>|!w5]!
KC3OBB-1>APT314,WIDE1-1,WIDE2-1:$GPRMC,191300,A,4015.8922,N,07946.0776,W,000,169,080221,,*09/TT3
 ROCKET|!&#c'?|!w5f!
KC3OBB-1>APT314,WIDE1-1,WIDE2-1:$GPRMC,191401,A,4015.8930,N,07946.0789,W,000,169,080221,,*0C|!'#c'@|!w<r!

 
 
 

From: "Jason KG4WSV" <kg4...@gmail.com>

Are you sure it’s in KISS mode?

That would equate to a bunch of binary garbage for the packet headers plus some 
readable text that’s the payload.

And maybe triple check the baud rate?

-Jason


> On Feb 8, 2021, at 6:30 AM, Eric Chamberlain <ericchamberl...@mail.com> wrote:
>
> That certainly prevents the port from blocking. The interface in xastir 
> returns as 'up' but it doesn't appear to be reading packets off the TNC in 
> the view-incoming data window. Looking in putty it still shows the incoming 
> packets. So its not quite fixed yet.
>
>
>
>
> From: "Jason KG4WSV" <kg4...@gmail.com>
>
> Try the /dev/cu.whatever device special file.
>
> It’s been a few years but when I hit the same problem (well, Kermit not 
> putty) switching to cu did the trick.
>
> -Jason
>
>> On Feb 7, 2021, at 8:44 PM, Eric Chamberlain <ericchamberl...@mail.com> 
>> wrote:
>>
>> I've been trying to configure an interface to read the tinytrak4 TNC, which 
>> is supposed to operate as KISS according to their docs. When I run PuTTY on 
>> the /dev/tty.usbserial-1430 port I can see packets coming in from a test 
>> transmitter. I close putty and open xastir so the port isn't blocking. When 
>> I go to start the TNC interface, in mac it hangs without messages in the 
>> terminal window. On the putty it doesn't hang but there's nothing. There are 
>> never incoming packets from the view data window. Unfortunately, Byonics say 
>> they don't know much about xastir. I've tried this both on my mac and my 
>> raspberry. The cable setup works for programming and PuTTY, so I don't think 
>> its that or drivers. I think it comes down to settings. Is there anything I 
>> can try?
>> _______________________________________________
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