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Subject: 
Re: Two motors at the same time... It is possible?
Newsgroups: 
lugnet.robotics.nxt
Date: 
Mon, 19 Feb 2007 10:34:22 GMT
Viewed: 
14427 times
  
John,


If you want to do these three things for two different motors
simultaneously you
can, but at the moment you have to roll your own code to do the job.


It worked just as I expected. The two motors now are rotating the same time.
Thanks to your example, now I am giving some time to understand this
setOutput call, and reading all the documentation (it is quite easier with
pratical examples...) , but i found that it does not accept negative values
for the tachoLimit parameter. (The motor does not move at all)

I did not find any mention in the "NXC  guide - output module section" for
changing the rotation direction of the motors, although i saw it is possible
to do that using the convenience calls like OnFwd(outputs, pwr) and
OnRev(outputs, pwr). So i can imagine there is a way...

Am I missing something?

----------------------------------------
#include "NXCDefs.h"

task main(){
  SetOutput(OUT_A,
            OutputMode, OUT_MODE_MOTORON + OUT_MODE_BRAKE,
            RegMode, OUT_REGMODE_IDLE,
            TachoLimit, -120,
            RunState, OUT_RUNSTATE_RUNNING,
            Power, 50,
            UpdateFlags,
UF_UPDATE_TACHO_LIMIT+UF_UPDATE_SPEED+UF_UPDATE_MODE);
}
----------------------------------------

Thanks again,

Patrick



Message has 1 Reply:
  Re: Two motors at the same time... It is possible?
 
(...) Hi Patrick, Indeed the Tacholimit can only be positive. But power can be negative, that's the way to reverse direction. Philo (18 years ago, 19-Feb-07, to lugnet.robotics.nxt)

Message is in Reply To:
  Re: Two motors at the same time... It is possible?
 
(...) It is possible. The NXC API doesn't currently wrap this capability in a really simple function. (...) The RotateMotor API function calls a subroutine written in NBC that does not return until the tachometer limit target has been reached. (...) (18 years ago, 19-Feb-07, to lugnet.robotics.nxt)

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