Re: linpsk error Debian's Woody 0.6.2-3
On Mon, 21 Oct 2002, Jaye Inabnit ke6sls wrote:
> This program seems to work on my laptop. I don't know why it works, but it
> does. I can send tone and transmit what sounds to be good tones w/signals.
> This is very interesting!
...
> In a way, this is good news. If this program works with this
> kernel/module/sounddevice, then others *should* work also. Clearly, your
> program is touching the device differently than the others are.
During the development of gmfsk I learned two things about the sound
support undex Linux:
1) There are drivers that don't handle full-duplex too well.
2) There are drivers that don't implement non-blocking I/O at all.
Because of the above I decided to try and make the job as easy as possible
for the sound driver. The modulator/demodulator runs in a separate thread,
allowing me to use blocking I/O without making the GUI sluggish. Also
the sound card is always closed and re-opened when changing from RX to TX
and back.
I think many of the other programs use full-duplex and non-bocking I/O
(not sure about the latter though). That might make the difference...
--
Tomi Manninen Internet: oh2bns@sral.fi
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