Subject:
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Re: Assembly in my C-program
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Wed, 28 Mar 2001 13:37:21 GMT
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Viewed:
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1290 times
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Actually I am trying to control a stepper motor. So when i need to send 50 pulses
fast, motor on and off takes same time because there same other tasks running at
the same time.
So it would be much quicker if I could just call motor speed (50), and Legos would
perform the on off for me (as it does now, but not continuously -pwm).
Regards,
Athanasios Kostakos
Jakob Engblom wrote:
> In lugnet.robotics.rcx.legos, Athanasios Kostakos writes:
> > HI,
> >
> > I was wondering if I could write assembly code in my c-program. I would like • to
> > access the motor output port as a digital port and control when it is on and
> > when off (possibly writting something like "mov.b r6l,@0xf000:16").
>
> This should be performed by mapping a variable on top of the memory location,
> and NOT by inline assembly.
>
> > Or can I change the dmotor.h file and when I call the "motor_a_speed(1-255)",
> > actually to control the times the motor output port will go on and off?
>
> What is wrong with speed=0 for off and speed=255 for on?
>
> /jakob
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Message has 2 Replies:
 | | Re: Assembly in my C-program
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| (...) If you want to drive directly the motors you should first disable motor handling in legOS (remove CONF_DMOTOR definition in config.h). Then you can create a high priority task that switches motors on and off writing in the motor output port. (...) (23 years ago, 28-Mar-01, to lugnet.robotics.rcx.legos)
| | | Re: Assembly in my C-program
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| (...) pulses (...) at (...) would (...) Hmmmm. This should be possible, but it's a bit more tricky with stepper motors - you have to allow for the speed-up and slow-down. Thus just calling motor_speed(50) would have to initiate a task that starts (...) (23 years ago, 28-Mar-01, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: Assembly in my C-program
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| (...) to (...) This should be performed by mapping a variable on top of the memory location, and NOT by inline assembly. (...) What is wrong with speed=0 for off and speed=255 for on? /jakob (23 years ago, 28-Mar-01, to lugnet.robotics.rcx.legos)
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