3 header file for the comedi library routines
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1998-2002 David A. Schleef <ds@schleef.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <sys/ioctl.h>
37 typedef struct comedi_t_struct comedi_t;
45 typedef struct comedi_sv_struct{
47 unsigned int subdevice;
54 /* number of measurements to average (for ai) */
60 enum comedi_oor_behavior {
61 COMEDI_OOR_NUMBER = 0,
68 comedi_t *comedi_open(const char *fn);
69 int comedi_close(comedi_t *it);
72 int comedi_loglevel(int loglevel);
73 void comedi_perror(const char *s);
74 char *comedi_strerror(int errnum);
75 int comedi_errno(void);
76 int comedi_fileno(comedi_t *it);
79 enum comedi_oor_behavior comedi_set_global_oor_behavior(enum comedi_oor_behavior behavior);
82 int comedi_get_n_subdevices(comedi_t *it);
83 int comedi_get_version_code(comedi_t *it);
84 char *comedi_get_driver_name(comedi_t *it);
85 char *comedi_get_board_name(comedi_t *it);
86 int comedi_get_read_subdevice(comedi_t *dev);
87 int comedi_get_write_subdevice(comedi_t *dev);
89 /* subdevice queries */
90 int comedi_get_subdevice_type(comedi_t *it,unsigned int subdevice);
91 int comedi_find_subdevice_by_type(comedi_t *it,int type,unsigned int subd);
92 int comedi_get_subdevice_flags(comedi_t *it,unsigned int subdevice);
93 int comedi_get_n_channels(comedi_t *it,unsigned int subdevice);
94 int comedi_range_is_chan_specific(comedi_t *it,unsigned int subdevice);
95 int comedi_maxdata_is_chan_specific(comedi_t *it,unsigned int subdevice);
98 lsampl_t comedi_get_maxdata(comedi_t *it,unsigned int subdevice,
100 int comedi_get_n_ranges(comedi_t *it,unsigned int subdevice,
102 comedi_range * comedi_get_range(comedi_t *it,unsigned int subdevice,
103 unsigned int chan,unsigned int range);
104 int comedi_find_range(comedi_t *it,unsigned int subd,unsigned int chan,
105 unsigned int unit,double min,double max);
108 int comedi_get_buffer_size(comedi_t *it,unsigned int subdevice);
109 int comedi_get_max_buffer_size(comedi_t *it,unsigned int subdevice);
110 int comedi_set_buffer_size(comedi_t *it,unsigned int subdevice,
113 /* low-level stuff */
114 #ifdef _COMEDILIB_DEPRECATED
115 int comedi_trigger(comedi_t *it,comedi_trig *trig); /* deprecated */
117 int comedi_do_insnlist(comedi_t *it,comedi_insnlist *il);
118 int comedi_do_insn(comedi_t *it,comedi_insn *insn);
119 int comedi_lock(comedi_t *it,unsigned int subdevice);
120 int comedi_unlock(comedi_t *it,unsigned int subdevice);
123 double comedi_to_phys(lsampl_t data,comedi_range *rng,lsampl_t maxdata);
124 lsampl_t comedi_from_phys(double data,comedi_range *rng,lsampl_t maxdata);
125 int comedi_sampl_to_phys(double *dest, int dst_stride, sampl_t *src,
126 int src_stride, comedi_range *rng, lsampl_t maxdata, int n);
127 int comedi_sampl_from_phys(sampl_t *dest,int dst_stride,double *src,
128 int src_stride, comedi_range *rng, lsampl_t maxdata, int n);
130 /* syncronous stuff */
131 int comedi_data_read(comedi_t *it,unsigned int subd,unsigned int chan,
132 unsigned int range,unsigned int aref,lsampl_t *data);
133 int comedi_data_read_n(comedi_t *it,unsigned int subd,unsigned int chan,
134 unsigned int range,unsigned int aref,lsampl_t *data, unsigned int n);
135 int comedi_data_read_hint(comedi_t *it,unsigned int subd,unsigned int chan,
136 unsigned int range,unsigned int aref);
137 int comedi_data_read_delayed(comedi_t *it,unsigned int subd,unsigned int chan,
138 unsigned int range,unsigned int aref,lsampl_t *data, unsigned int nano_sec);
139 int comedi_data_write(comedi_t *it,unsigned int subd,unsigned int chan,
140 unsigned int range,unsigned int aref,lsampl_t data);
141 int comedi_dio_config(comedi_t *it,unsigned int subd,unsigned int chan,
143 int comedi_dio_read(comedi_t *it,unsigned int subd,unsigned int chan,
145 int comedi_dio_write(comedi_t *it,unsigned int subd,unsigned int chan,
147 int comedi_dio_bitfield(comedi_t *it,unsigned int subd,
148 unsigned int write_mask, unsigned int *bits);
150 /* slowly varying stuff */
151 int comedi_sv_init(comedi_sv_t *it,comedi_t *dev,unsigned int subd,unsigned int chan);
152 int comedi_sv_update(comedi_sv_t *it);
153 int comedi_sv_measure(comedi_sv_t *it,double *data);
155 /* streaming I/O (commands) */
157 int comedi_get_cmd_src_mask(comedi_t *dev,unsigned int subdevice,
159 int comedi_get_cmd_generic_timed(comedi_t *dev,unsigned int subdevice,
160 comedi_cmd *cmd,unsigned int ns);
161 int comedi_cancel(comedi_t *it,unsigned int subdevice);
162 int comedi_command(comedi_t *it,comedi_cmd *cmd);
163 int comedi_command_test(comedi_t *it,comedi_cmd *cmd);
164 int comedi_poll(comedi_t *dev,unsigned int subdevice);
168 int comedi_set_max_buffer_size(comedi_t *it, unsigned int subdev,
169 unsigned int max_size);
170 int comedi_get_buffer_contents(comedi_t *it, unsigned int subdev);
171 int comedi_mark_buffer_read(comedi_t *it, unsigned int subdev,
173 int comedi_get_buffer_offset(comedi_t *it, unsigned int subdev);
175 #ifdef _COMEDILIB_DEPRECATED
177 * The following functions are deprecated and should not be used.
179 int comedi_get_timer(comedi_t *it,unsigned int subdev,double freq,
180 unsigned int *trigvar,double *actual_freq);
181 int comedi_timed_1chan(comedi_t *it,unsigned int subdev,unsigned int chan,
182 unsigned int range, unsigned int aref,double freq,
183 unsigned int n_samples,double *data);
184 int comedi_get_rangetype(comedi_t *it,unsigned int subdevice,
189 #ifndef _COMEDILIB_STRICT_ABI
191 The following prototypes are _NOT_ part of the Comedilib ABI, and
192 may change in future versions without regard to source or binary
193 compatibility. In practice, this is a holding place for the next
194 library ABI version change.
196 int comedi_apply_calibration( comedi_t *dev, unsigned int subdev, unsigned int channel,
197 unsigned int range, unsigned int aref, const char *cal_file_path);