151 lines
3.2 KiB
C
151 lines
3.2 KiB
C
/*
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lib/get.c
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comedi library routines
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1997-8 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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#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <comedi.h>
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#include <string.h>
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#include <libinternal.h>
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int comedi_get_n_subdevices(comedi_t *it)
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{
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if(!valid_dev(it))
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return -1;
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return it->n_subdevices;
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}
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int comedi_get_version_code(comedi_t *it)
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{
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if(!valid_dev(it))
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return -1;
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return it->devinfo.version_code;
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}
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char *comedi_get_driver_name(comedi_t *it)
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{
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if(!valid_dev(it))
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return NULL;
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return it->devinfo.driver_name;
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}
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char *comedi_get_board_name(comedi_t *it)
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{
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if(!valid_dev(it))
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return NULL;
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return it->devinfo.board_name;
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}
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int comedi_get_subdevice_type(comedi_t *it,unsigned int subd)
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{
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if(!valid_dev(it))
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return -1;
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return it->subdevices[subd].type;
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}
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int comedi_find_subdevice_by_type(comedi_t *it,int type,unsigned int subd)
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{
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if(!valid_subd(it,subd))
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return -1;
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for(;subd<it->n_subdevices;subd++){
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if(it->subdevices[subd].type==type)
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return subd;
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}
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return -1;
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}
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int comedi_get_n_channels(comedi_t *it,unsigned int subd)
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{
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if(!valid_subd(it,subd))
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return -1;
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return it->subdevices[subd].n_chan;
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}
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/* */
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lsampl_t comedi_get_maxdata(comedi_t *it,unsigned int subdevice,unsigned int chan)
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{
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if(!valid_chan(it,subdevice,chan))
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return 0;
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if(it->subdevices[subdevice].maxdata_list)
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return it->subdevices[subdevice].maxdata_list[chan];
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return it->subdevices[subdevice].maxdata;
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}
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int comedi_maxdata_is_chan_specific(comedi_t *it,unsigned int subdevice)
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{
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if(it->subdevices[subdevice].maxdata_list)
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return 1;
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return 0;
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}
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int comedi_get_rangetype(comedi_t *it,unsigned int subdevice,unsigned int chan)
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{
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if(!valid_chan(it,subdevice,chan))
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return -1;
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if(it->subdevices[subdevice].range_type_list)
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return it->subdevices[subdevice].range_type_list[chan];
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return it->subdevices[subdevice].range_type;
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}
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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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{
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int range_type;
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if(!valid_chan(it,subdevice,chan))
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return NULL;
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range_type=comedi_get_rangetype(it,subdevice,chan);
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if(range>=RANGE_LENGTH(range_type))
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return NULL;
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if(it->subdevices[subdevice].rangeinfo_list)
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return it->subdevices[subdevice].rangeinfo_list[chan]+range;
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return it->subdevices[subdevice].rangeinfo+range;
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}
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