Hi Garrett,
garrett beaubien wrote:
>
> Hello,
>
> I noticed that a couple of other people may have had the same problem as I
> do when I installed rtlinux. I installed rtlinux 2.2, and recieved the same
> 'unresolved symbols' as some of the other people when rebooting with rtlinux
> and testing the examples. I'm pretty sure that the reason is that I don't
> have the rtlinux modules installed. I was wondering if I could ask a stupid
> question? How do I install them? are those the last make; make install
> steps? After doing this, should I be able to see the modules with
> /sbin/lsmod? I did this, and saw nothing. could I be issuing these
> commands from the wrong directory (i did it in /usr/src/linux after making
> the symbolic link)? one set of instructions (for version 2.0) specifies a
> directory that does not exist on my machine.
>
The easiest way to install the rtlinux modules is to use the insrtl
script as root. This can be found in /usr/src/rtlinux-2.2 (or similar
directory).
> Anyhow, what I was planning to use rtlinux for was a servo motor controller.
> I was thinking that I could use the scheduler to periodically (say every 100
> or 200 uS) read the position of the motor (from a quadrature counter),
> calculate the PID loop, and output the value to a DAC. I would think that a
> modern machine could handle several axes, and would be WAY cheaper than a
> modern motion controller.
>
If you look at the many examples, you will see how to set up a periodic
task. This should help you design your application.
Regards, Stuart.
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