Wayne Topa wrote:
Kent West([EMAIL PROTECTED]) is reported to have said:
Hugo Vanwoerkom wrote:
Kent West wrote:
All I want to do is to detect two keys, say the left- and right-shift
keys, or the < and > keys. For one key, a short "dit" audio tone would be
generated, and for the other key, a longer "dah" audio tone would be
generated. I need to bypass the keyboard buffer, so that holding down the
dit key for two seconds doesn't generate 30 dits; it should produce dits
while the key is held down, but once the key is let up, the dits should
immediately stop (after finishing the one it's on).
IFAIK you've hit upon the one problem in cross-platform programming,
access to the speaker for variable duration (dit and dah).
I would use Qt and that makes keypresses easy to detect, but not sound of
variable duration, unless you don't mind recording a dit.wav and a dah.wav
and then the problem is easy again.
Ah, this is the info I needed. Basically what I'm hearing is that it can't
be done, easily, cross-platform, suitably for giving my fellow hams a taste
of programming.
Bummer.
This may not be what your looking for either Kent, but...
Install the beep package. Then, using bash, write a program to output
to the case speaker like this.
A="/usr/bin/beep -l 80 -f 1000 ;sleep .1;/usr/bin/beep -d 100 -l 250 -f 1000"
B="/usr/bin/beep -d 100 -l 250 -f 1000 ; sleep .1;/usr/bin/beep -l 80 -r 3 -f
1000"
etc
I have 'UP' sent every 5 minutes if I'm connected to the net (dialup).
Sorry if this is waaay OT.
Turns out that keypress access *is* the hardest. You have that in Qt but
you have to be running in X and within a widget. It's ridiculous to do
all that to find out if a key is pressed.
I have no idea how to find out in low-level programming whether a key is
depressed.
Any kernel savvy people out there?
Hugo
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