157 lines
4.7 KiB
C
157 lines
4.7 KiB
C
/*
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include/comedilib.h
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header file for the comedi library routines
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1998 David A. Schleef <ds@stm.lbl.gov>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _COMEDILIB_H
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#define _COMEDILIB_H
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#include <comedi.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct comedi_t_struct comedi_t;
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typedef struct{
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double min;
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double max;
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unsigned int unit;
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}comedi_range;
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typedef struct comedi_sv_struct{
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comedi_t *dev;
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unsigned int subdevice;
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unsigned int chan;
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/* range policy */
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int range;
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int aref;
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/* number of measurements to average (for ai) */
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int n;
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lsampl_t maxdata;
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}comedi_sv_t;
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comedi_t *comedi_open(const char *fn);
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void comedi_close(comedi_t *it);
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int comedi_loglevel(int loglevel);
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void comedi_perror(const char *s);
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char *comedi_strerror(int errnum);
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int comedi_errno(void);
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int comedi_fileno(comedi_t *it);
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/* queries */
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int comedi_get_n_subdevices(comedi_t *it);
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int comedi_get_version_code(comedi_t *it);
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char *comedi_get_driver_name(comedi_t *it);
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char *comedi_get_board_name(comedi_t *it);
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int comedi_get_subdevice_type(comedi_t *it,unsigned int subdevice);
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int comedi_find_subdevice_by_type(comedi_t *it,int type,unsigned int subd);
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int comedi_get_n_channels(comedi_t *it,unsigned int subdevice);
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lsampl_t comedi_get_maxdata(comedi_t *it,unsigned int subdevice,unsigned int chan);
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int comedi_get_rangetype(comedi_t *it,unsigned int subdevice,unsigned int chan);
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comedi_range * comedi_get_range(comedi_t *it,unsigned int subdevice,unsigned int chan,unsigned int range);
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int comedi_find_range(comedi_t *it,unsigned int subd,unsigned int chan,unsigned int unit,double min,double max);
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int comedi_get_n_ranges(comedi_t *it,unsigned int subdevice,unsigned int chan);
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int comedi_range_is_chan_specific(comedi_t *it,unsigned int subdevice);
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int comedi_maxdata_is_chan_specific(comedi_t *it,unsigned int subdevice);
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/* triggers and commands */
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int comedi_cancel(comedi_t *it,unsigned int subdevice);
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int comedi_trigger(comedi_t *it,comedi_trig *trig);
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int comedi_command(comedi_t *it,comedi_cmd *cmd);
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int comedi_command_test(comedi_t *it,comedi_cmd *cmd);
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int comedi_do_insnlist(comedi_t *it,comedi_insnlist *il);
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int comedi_do_insn(comedi_t *it,comedi_insn *insn);
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int comedi_lock(comedi_t *it,unsigned int subdevice);
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int comedi_unlock(comedi_t *it,unsigned int subdevice);
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/* physical units */
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double comedi_to_phys(lsampl_t data,comedi_range *rng,lsampl_t maxdata);
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lsampl_t comedi_from_phys(double data,comedi_range *rng,lsampl_t maxdata);
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/* synchronous stuff */
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int comedi_data_read(comedi_t *it,unsigned int subd,unsigned int chan,unsigned int range,
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unsigned int aref,lsampl_t *data);
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int comedi_data_write(comedi_t *it,unsigned int subd,unsigned int chan,unsigned int range,
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unsigned int aref,lsampl_t data);
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/* slowly varying stuff */
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int comedi_sv_init(comedi_sv_t *it,comedi_t *dev,unsigned int subd,unsigned int chan);
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int comedi_sv_update(comedi_sv_t *it);
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int comedi_sv_measure(comedi_sv_t *it,double *data);
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/* dio config */
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int comedi_dio_config(comedi_t *it,unsigned int subd,unsigned int chan,unsigned int dir);
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int comedi_dio_read(comedi_t *it,unsigned int subd,unsigned int chan,unsigned int *bit);
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int comedi_dio_write(comedi_t *it,unsigned int subd,unsigned int chan,unsigned int bit);
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int comedi_dio_bitfield(comedi_t *it,unsigned int subd,unsigned int write_mask,
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unsigned int *bits);
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/* timer stuff */
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int comedi_get_timer(comedi_t *it,unsigned int subdev,double freq,unsigned int *trigvar,
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double *actual_freq);
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int comedi_timed_1chan(comedi_t *it,unsigned int subdev,unsigned int chan,unsigned int range,
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unsigned int aref,double freq,unsigned int n_samples,double *data);
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/*
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The following prototypes are ALPHA, indicating that they might change
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in future releases of comedilib, without regard to backward compatibility.
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*/
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enum comedi_oor_behavior {
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COMEDI_OOR_NUMBER = 0,
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COMEDI_OOR_NAN
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};
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enum comedi_oor_behavior comedi_set_global_oor_behavior(enum comedi_oor_behavior behavior);
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#ifdef __cplusplus
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}
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#endif
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#endif
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