From 910ca29fed9df01c97a11b5e0e33b1e869266e31 Mon Sep 17 00:00:00 2001 From: Andrew Date: Fri, 20 Jan 2017 10:56:57 -0800 Subject: [PATCH] update direwolf.txt with descption of audio PTT usage --- direwolf.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/direwolf.txt b/direwolf.txt index c857739..e45d9c1 100644 --- a/direwolf.txt +++ b/direwolf.txt @@ -234,10 +234,16 @@ C# Both can be used for interfaces that want them driven with opposite polarity. C# L# COM1 can be used instead of /dev/ttyS0, COM2 for /dev/ttyS1, and so on. L# +C# With a suitable interface circuit an audio channel can also be used to +C# trigger the PTT control. The device should be specified as CHANNEL, +C# followed by the channel number and (optionally) the desired frequency, +C# in Hz, of the audio tone to be used. The frequency must be between +C# 50 and 20000 Hz and defaults to 1000 Hz. C C#PTT COM1 RTS C#PTT COM1 RTS -DTR L#PTT /dev/ttyUSB0 RTS +C#PTT CHANNEL 1 1000 C L# L# On Linux, you can also use general purpose I/O pins if