Subject:
|
Re: Assembly in my C-program
|
Newsgroups:
|
lugnet.robotics.rcx.legos
|
Date:
|
Wed, 28 Mar 2001 13:37:21 GMT
|
Viewed:
|
1434 times
|
| |
|
|
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
|
|
Message has 2 Replies:
 | | Re: Assembly in my C-program
|
| (...) 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. (...) (24 years ago, 28-Mar-01, to lugnet.robotics.rcx.legos)
| | | Re: Assembly in my C-program
|
| (...) 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 (...) (24 years ago, 28-Mar-01, to lugnet.robotics.rcx.legos)
|
Message is in Reply To:
| | Re: Assembly in my C-program
|
| (...) 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 (24 years ago, 28-Mar-01, to lugnet.robotics.rcx.legos)
|
5 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
