Hi Martin,
does your void *thread_code(void *t) contain pthread_wait_np(); ???
Have you left init_module/cleanup_module unchangend???
Before doing anything else add same rtl_printf to init_module
and thread_code to locate place of crash.
Anyway your story is a bit surprising to me. Drop me your code +
Makefile. (I've got the same kind of application).
Regards,
pa
On Tue, Sep 19, 2000 at 10:57:05PM +0200, Martin wrote:
> The more I read about the use of floating points the more I get confused
> about it.
>
> I am about to control a tricept-robot with rtlinux-2.3-pre2. Since I
> started trying and working with your kernel, I read about the use of
> fp's in the mailing list every night. Now I have set up the
> communication with the powerboard with the rt_com-module and I'm ready
> to implement the whole computation of the control-values into the
> "thread_code" of Barabanov's testcom.c, which seems very suitable for my
> project. - But I still don't know how to make it work.
>
> My computation is quite large with plenty of pow's, sqrt's, sin's and
> cos's in it. But it has to be done in realtime to be able to control the
> machine (it worked with DOS at a period of 20ms).
>
> Now I did the following test:
>
> ... all unchanged untill here...
>
> void *thread_code(void *t) {
> pthread_setfp_np(thread, 1);
> pthread_make_periodic_np(thread,...)
> do {
> int n;
> char buf[210]
> double a, b;
> a = 2.0;
> b = sqrt(a);
> ...then no change anymore...
> } while(1);
> return 0;
> }
>
> ...and added the following lines in the Makefile:
> testfp: testcom_fp.o
> $(CC) $(CFLAGS) -c testcom_fp.c
>
> I had no errors with make testfp, but - I guess the cracks between you
> are already laughing - the insmod testcom_fp.o brought down my machine
> immediatly and completly. Is it may not allowed to use more than one
> pthread_function or is the math-function itself the problem? I couldn't
> get any messages after the insmod, also after the poweroff, the kernel
> seems really to stop working there.
>
--
..........................................................................
Pavel Andris | tel: +421 7 5941 2167
Institute of Control Theory and Robotics | fax: +421 7 5477 6045
Slovak Academy of Sciences |
Dubravska cesta 9 | e-mail: [EMAIL PROTECTED]
SK - 842 37 Bratislava |
Slovakia |
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