- From: Roberto Bucher <roberto.bucher_at_supsi.ch>
- Date: Mon, 21 May 2007 19:58:31 +0200
Please check that the comedi includes under /usr/local/include are the files
provided by comedi and not the files from comedilib (which cause some
compilation errors).
Roberto
On Monday 21 May 2007 19:09, L.C. Karssen wrote:
> On Mon, 2007-05-21 at 16:30 +0000, L.C. Karssen wrote:
> > On Mon, 2007-05-21 at 19:52 +0200, Paolo Mantegazza wrote:
> > > L.C. Karssen wrote:
> > > > On Mon, 2007-05-21 at 09:42 +0000, L.C. Karssen wrote:
> > > >>On Sun, 2007-05-13 at 23:37 +0200, Paolo Mantegazza wrote:
> > > >>>L.C. Karssen writes:
> >
> > Furthermore, I looked at rtai_comedi_dioout.c from RTAILab and found
> > that it includes rtai_comedi.h. I have the following RTAI and comedi
> > related includes:
> > #include "/usr/local/include/comedilib.h"
> > #include <rtai_lxrt.h>
> >
> > I included rtai_comedi.h but that resulted in a lot of errors because of
> > overshadowed definitions (because of comedilib.h).
>
> An example of such an error:
>
> In file included from daqwrite.c:25:
> /usr/realtime/include/rtai_comedi.h:123: error: conflicting types for
> 'comedi_open'
> /usr/local/include/comedilib.h:68: error: previous declaration of
> 'comedi_open' was here
>
>
> In comedilib.h:68:
> comedi_t *comedi_open(const char *fn);
>
> In rtai_comedi.h:123:
> RTAI_PROTO(void *, comedi_open,(const char *filename))
> {
> char lfilename[COMEDI_NAMELEN];
> struct { char *minor; } arg = { lfilename };
> strncpy(lfilename, filename, COMEDI_NAMELEN - 1);
> return rtai_lxrt(FUN_COMEDI_LXRT_INDX, COMEDI_LXRT_SIZARG,
> _KCOMEDI_OPEN, &arg).v[LOW];
> }
>
> > When only including
> > rtai_comedi.h I get a lot of syntax errors. I'm going to check why that
> > happens.
>
> When not including /usr/local/comedilib.h I get errors because of
> missing definitions of e.g. comedi_t, comedi_range and comedi_dev. The
> typedefs of these are in comedilib.h.
> I need those to initialise my comedi device, as in the following code
> for example:
> comedi_t *comedi_dev;
> comedi_dev = comedi_open(comedi_devname);
>
>
> Lennart
>
> > Thanks,
> >
> > Lennart
> >
> > > Paolo
> > >
> > > >>Any help is appreciated!
> > > >>
> > > >>
> > > >>Lennart.
> > > >>
> > > >>
> > > >>int do_comedi(struct data_struct *options)
> > > >>{
> > > >> comedi_t *comedi_dev = options->device;
> > > >> unsigned int ao_subdev = options->AO_subdevice; // Analog
> > > >> Output unsigned int dio_subdev = options-> DIO_subdevice; // Digital
> > > >> IO int range=0; // AO has only one range: 10V -> -10V
> > > >> comedi_insn insn;
> > > >> lsampl_t data;
> > > >> unsigned int dio_bits;
> > > >> int aref = AREF_GROUND;
> > > >> unsigned int dio_mask = 0xFFFFFFFF; // Tells which DIO bits are
> > > >> to be flipped (all).
> > > >>
> > > >> int period;
> > > >> struct bits *data_arr = options->bitsarr;
> > > >>
> > > >> RT_TASK* task;
> > > >> int priority=0;
> > > >> int stack_size=4096;
> > > >> int msg_size=0;
> > > >>
> > > >> int i;
> > > >>
> > > >> /* Prepare the AO instruction as much as possible. Later, in real
> > > >>time
> > > >> * we'll only fill in the data sample. */
> > > >> insn.insn = INSN_WRITE;
> > > >> insn.n = 1;
> > > >> insn.subdev = ao_subdev;
> > > >>
> > > >> /* A better scheduler than linux' one */
> > > >> struct sched_param mysched;
> > > >>
> > > >> /* We don't want to be swapped out the mem */
> > > >> mlockall (MCL_CURRENT | MCL_FUTURE);
> > > >> /* Allow nonroot users hard realtime access */
> > > >> rt_allow_nonroot_hrt();
> > > >>
> > > >> /* Initialise Scheduler as SCHED_FIFO. Greatly improves
> > > >> scheduler! */
> > > >> mysched.sched_priority = sched_get_priority_max(SCHED_FIFO) - 1;
> > > >> if( sched_setscheduler( 0, SCHED_FIFO, &mysched ) == -1 )
> > > >> {
> > > >> fprintf(stderr, "Error in setting the Scheduler!\n");
> > > >> exit(1);
> > > >> }
> > > >>
> > > >> /* Register this thread as a RT task. As long as it's
> > > >> not switched to hard_real_time, it's still a normal process
> > > >> and can do all normal things */
> > > >> task = rt_task_init(nam2num("do_comedi"), priority, stack_size,
> > > >>msg_size);
> > > >>
> > > >> // Set mode to periodic. Other option is 'oneshot'
> > > >> rt_set_periodic_mode();
> > > >> period = (int) nano2count((RTIME)options->period*1000);
> > > >>
> > > >> start_rt_timer(period);
> > > >>
> > > >> // Switch to hard realtime mode
> > > >> rt_make_hard_real_time();
> > > >>
> > > >> // Start scheduler
> > > >> rt_task_make_periodic(task, rt_get_time() + period, period);
> > > >>
> > > >>
> > > >> for (i=0; i<options->n_rows; i++)
> > > >> {
> > > >>
> > > >> /* Prepare and write digital data. */
> > > >> dio_bits = data_arr[i].DIO;
> > > >> comedi_dio_bitfield(comedi_dev, dio_subdev, dio_mask, &dio_bits);
> > > >>
> > > >> /* Prepare and write AO data */
> > > >> data = data_arr[i].AO0;
> > > >> insn.data = &data;
> > > >> insn.chanspec = CR_PACK(0, range, aref);
> > > >> if(comedi_do_insn(comedi_dev, &insn)<0)
> > > >> {
> > > >> comedi_perror("/dev/comedi0");
> > > >> exit(1);
> > > >> }
> > > >>
> > > >> data = data_arr[i].AO1;
> > > >> insn.data = &data;
> > > >> insn.chanspec = CR_PACK(1, range, aref);
> > > >> if(comedi_do_insn(comedi_dev, &insn)<0)
> > > >> {
> > > >> comedi_perror("/dev/comedi0");
> > > >> exit(1);
> > > >> }
> > > >> rt_task_wait_period();
> > > >> }
> > > >>
> > > >> rt_make_soft_real_time();
> > > >>
> > > >>#ifdef DEBUG
> > > >> printf("We're back in soft realtime.\n");
> > > >>#endif
> > > >>
> > > >> // Stop timer
> > > >> stop_rt_timer();
> > > >>
> > > >> // Unregister RT task
> > > >> rt_task_delete(task);
> > > >>
> > > >> // Unlock mem
> > > >> munlockall();
> > > >>
> > > >> return 0;
> > > >>}
> > > >>
> > > >>>Paolo.
> > > >>>
> > > >>>>Lennart.
> > > >>>>--
> > > >>>>*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
> > > >>>>L.C. Karssen
> > > >>>>Department of Physics and Astronomy
> > > >>>>Faculty of Science
> > > >>>>Utrecht University
> > > >>>>Princetonplein 1
> > > >>>>3584 CC Utrecht
> > > >>>>The Netherlands
> > > >>>>
> > > >>>>tel.: +31 (0)30-253-2208
> > > >>>>fax.: +31 (0)30-253-7468
> > > >>>>e-mail: L.C.Karssen_at_phys.uu.nl
> > > >>>>www: http://www1.phys.uu.nl/wwwaoud
> > > >>>>-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
> > > >>>>
> > > >>>>
> > > >>>>_______________________________________________
> > > >>>>RTAI mailing list
> > > >>>>RTAI_at_rtai.org
> > > >>>>https://mail.rtai.org/cgi-bin/mailman/listinfo/rtai
--
University of Applied Sciences of Southern Switzerland
Dept. Innovative Technologies
CH-6928 Lugano-Manno
http://web.dti.supsi.ch/~bucher/
Received on 2007-05-21Z16:58:31