Subject:
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Re: Rotation and Touch Sensors on one input
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 28 Jan 1999 16:42:57 GMT
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Viewed:
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1162 times
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Eric Haberfellner writes:
> lego-robotics@crynwr.com (Markus L. Noga) writes:
> > Hi Eric,
> >
> > Eric Haberfellner wrote:
> > > I was playing around with legOS 0.1.5 last night (thanks for legOS Markus) • and
> > > was able to get the rotation sensor code working fairly well. While doing • this
> >
> > You're welcome. Could you be more specific than "fairly well"? I've
> > heard different stories. Some people reported rotation works perfectly
> > in one direction and not at all in the other. Others experienced other
> > results. Did you modify the state machine code? If yes, several people
> > might want to try your patches.
> >
> > Ciao,
> >
> > Markus.
> >
> > --
> Markus and others, here is my modified version of direct-sensor.c
> Sorry that this is so long, but I do not have a web site to post this on.
> -- snip --
In the file that I just posted there is a section which looks like this in
ds_rotation_handler ()
unsigned int cnt; //ERH
lcd_int ( raw ); //ERH
// lcd_int (state); //ERH
lcd_refresh (); //ERH
for ( cnt = 0; cnt < 10000; cnt++ ); //ERH
This will cause the state machine to run slowly, and put apparent junk on the
LCD display. This is debug code that I was using to observe RAW and state
values. Either remove it or replace it with:
// unsigned int cnt; //ERH
// lcd_int ( raw ); //ERH
// lcd_int (state); //ERH
// lcd_refresh (); //ERH
// for ( cnt = 0; cnt < 10000; cnt++ ); //ERH
Once again I would like to thank Markus for legOS. He did all the hard work.
All I did was tinker with the state machine a little bit.
Also, in order to use the touch sensor on the same input you have to modify
the wake up function in rotation-sensor.c to look something like this:
--
#define BUTTON_PRESS 100
// rotation change event wakeup function
//
wakeup_t rotation_change_wakeup(wakeup_t data) {
static unsigned rot;
unsigned *address=(unsigned*) ((unsigned)data);
//ignore changed value if it is due to button press
//This way, we do not generate false rotation events.
if ( (*address >> 6) < BUTTON_PRESSED )
return 0;
if(*address != rot) {
rot=*address;
return 1;
}
return 0;
}
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Message is in Reply To:
 | | Re: Rotation and Touch Sensors on one input
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| (...) and (...) this (...) Markus and others, here is my modified version of direct-sensor.c Sorry that this is so long, but I do not have a web site to post this on. -- // // legOS - the independent LEGO Mindstorms OS // direct-sensor.c - direct (...) (26 years ago, 28-Jan-99, to lugnet.robotics)
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