2 include/comedi.h (installed as /usr/include/comedi.h)
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1998-2000 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.
32 /* comedi's major device number */
33 #define COMEDI_MAJOR 98
36 maximum number of minor devices. This can be increased, although
37 kernel structures are currently statically allocated, thus you
38 don't want this to be much more than you actually use.
40 #define COMEDI_NDEVICES 4
42 /* number of config options in the config structure */
43 #define COMEDI_NDEVCONFOPTS 32
45 /* max length of device and driver names */
46 #define COMEDI_NAMELEN 20
49 typedef unsigned int lsampl_t;
50 typedef unsigned short sampl_t;
52 /* packs and unpacks a channel/range number */
54 #define CR_PACK(chan,rng,aref) ( (((aref)&0x3)<<24) | (((rng)&0xff)<<16) | ((chan)&0xffff) )
56 #define CR_CHAN(a) ((a)&0xffff)
57 #define CR_RANGE(a) (((a)>>16)&0xff)
58 #define CR_AREF(a) (((a)>>24)&0x03)
60 #define AREF_GROUND 0x00 /* analog ref = analog ground */
61 #define AREF_COMMON 0x01 /* analog ref = analog common */
62 #define AREF_DIFF 0x02 /* analog ref = differential */
63 #define AREF_OTHER 0x03 /* analog ref = other (undefined) */
65 /* counters -- these are arbitrary values */
66 #define GPCT_RESET 0x0001
67 #define GPCT_SET_SOURCE 0x0002
68 #define GPCT_SET_GATE 0x0004
69 #define GPCT_SET_DIRECTION 0x0008
70 #define GPCT_SET_OPERATION 0x0010
71 #define GPCT_ARM 0x0020
72 #define GPCT_DISARM 0x0040
73 #define GPCT_GET_INT_CLK_FRQ 0x0080
75 #define GPCT_INT_CLOCK 0x0001
76 #define GPCT_EXT_PIN 0x0002
77 #define GPCT_NO_GATE 0x0004
78 #define GPCT_UP 0x0008
79 #define GPCT_DOWN 0x0010
80 #define GPCT_HWUD 0x0020
81 #define GPCT_SIMPLE_EVENT 0x0040
82 #define GPCT_SINGLE_PERIOD 0x0080
83 #define GPCT_SINGLE_PW 0x0100
84 #define GPCT_CONT_PULSE_OUT 0x0200
85 #define GPCT_SINGLE_PULSE_OUT 0x0400
90 #define INSN_MASK_WRITE 0x8000000
91 #define INSN_MASK_READ 0x4000000
92 #define INSN_MASK_SPECIAL 0x2000000
94 #define INSN_READ ( 0 | INSN_MASK_READ)
95 #define INSN_WRITE ( 1 | INSN_MASK_WRITE)
96 #define INSN_BITS ( 2 | INSN_MASK_READ|INSN_MASK_WRITE)
97 #define INSN_CONFIG ( 3 | INSN_MASK_READ|INSN_MASK_WRITE)
98 #define INSN_GTOD ( 4 | INSN_MASK_READ|INSN_MASK_SPECIAL)
99 #define INSN_WAIT ( 5 | INSN_MASK_WRITE|INSN_MASK_SPECIAL)
103 #define TRIG_BOGUS 0x0001 /* do the motions */
104 #define TRIG_DITHER 0x0002 /* enable dithering */
105 #define TRIG_DEGLITCH 0x0004 /* enable deglitching */
106 #define TRIG_RT 0x0008 /* perform op in real time */
107 #define TRIG_CONFIG 0x0010 /* perform configuration, not triggering */
108 #define TRIG_WAKE_EOS 0x0020 /* wake up on end-of-scan events */
109 #define TRIG_WRITE 0x0040 /* write to bidirectional devices */
111 #define TRIG_ROUND_MASK 0x00030000
112 #define TRIG_ROUND_NEAREST 0x00000000
113 #define TRIG_ROUND_DOWN 0x00010000
114 #define TRIG_ROUND_UP 0x00020000
115 #define TRIG_ROUND_UP_NEXT 0x00030000
117 /* trigger sources */
119 #define TRIG_ANY 0xffffffff
120 #define TRIG_NONE 0x00000001 /* never trigger */
121 #define TRIG_NOW 0x00000002 /* trigger now + N ns */
122 #define TRIG_FOLLOW 0x00000004 /* trigger on next lower level trig */
123 #define TRIG_TIME 0x00000008 /* trigger at time N ns */
124 #define TRIG_TIMER 0x00000010 /* trigger at rate N ns */
125 #define TRIG_COUNT 0x00000020 /* trigger when count reaches N */
126 #define TRIG_EXT 0x00000040 /* trigger on external signal N */
127 #define TRIG_INT 0x00000080 /* trigger on comedi-internal signal N */
129 #define TRIG_INVAL 0x00000100 /* choice was invalid */
131 /* subdevice flags */
133 #define SDF_BUSY 0x0001 /* device is busy */
134 #define SDF_BUSY_OWNER 0x0002 /* device is busy with your job */
135 #define SDF_LOCKED 0x0004 /* subdevice is locked */
136 #define SDF_LOCK_OWNER 0x0008 /* you own lock */
137 #define SDF_MAXDATA 0x0010 /* maxdata depends on channel */
138 #define SDF_FLAGS 0x0020 /* flags depend on channel */
139 #define SDF_RANGETYPE 0x0040 /* range type depends on channel */
140 #define SDF_MODE0 0x0080 /* can do mode 0 */
141 #define SDF_MODE1 0x0100 /* can do mode 1 */
142 #define SDF_MODE2 0x0200 /* can do mode 2 */
143 #define SDF_MODE3 0x0400 /* can do mode 3 */
144 #define SDF_MODE4 0x0800 /* can do mode 4 */
145 #define SDF_CMD 0x1000 /* can do commands */
147 #define SDF_READABLE 0x00010000 /* subdevice can be read (e.g. analog input) */
148 #define SDF_WRITEABLE 0x00020000 /* subdevice can be written (e.g. analog output) */
149 #define SDF_INTERNAL 0x00040000 /* subdevice does not have externally visible lines */
150 #define SDF_RT 0x00080000 /* subdevice is RT capable */
151 #define SDF_GROUND 0x00100000 /* can do aref=ground */
152 #define SDF_COMMON 0x00200000 /* can do aref=common */
153 #define SDF_DIFF 0x00400000 /* can do aref=diff */
154 #define SDF_OTHER 0x00800000 /* can do aref=other */
155 #define SDF_DITHER 0x01000000 /* can do dithering */
156 #define SDF_DEGLITCH 0x02000000 /* can do deglitching */
157 #define SDF_MMAP 0x04000000 /* can do mmap() */
158 #define SDF_RUNNING 0x08000000 /* subdevice is acquiring data */
159 #define SDF_LSAMPL 0x10000000 /* subdevice uses 32-bit samples */
160 #define SDF_PACKED 0x20000000 /* subdevice can do packed DIO */
162 /* subdevice types */
164 #define COMEDI_SUBD_UNUSED 0 /* unused */
165 #define COMEDI_SUBD_AI 1 /* analog input */
166 #define COMEDI_SUBD_AO 2 /* analog output */
167 #define COMEDI_SUBD_DI 3 /* digital input */
168 #define COMEDI_SUBD_DO 4 /* digital output */
169 #define COMEDI_SUBD_DIO 5 /* digital input/output */
170 #define COMEDI_SUBD_COUNTER 6 /* counter */
171 #define COMEDI_SUBD_TIMER 7 /* timer */
172 #define COMEDI_SUBD_MEMORY 8 /* memory, EEPROM, DPRAM */
173 #define COMEDI_SUBD_CALIB 9 /* calibration DACs */
174 #define COMEDI_SUBD_PROC 10 /* processor, DSP */
177 #define COMEDI_INPUT 0
178 #define COMEDI_OUTPUT 1
183 #define COMEDI_DEVCONFIG _IOW(CIO,0,comedi_devconfig)
184 #define COMEDI_DEVINFO _IOR(CIO,1,comedi_devinfo)
185 #define COMEDI_SUBDINFO _IOR(CIO,2,comedi_subdinfo)
186 #define COMEDI_CHANINFO _IOR(CIO,3,comedi_chaninfo)
187 #define COMEDI_TRIG _IOWR(CIO,4,comedi_trig)
188 #define COMEDI_LOCK _IO(CIO,5)
189 #define COMEDI_UNLOCK _IO(CIO,6)
190 #define COMEDI_CANCEL _IO(CIO,7)
191 #define COMEDI_RANGEINFO _IOR(CIO,8,comedi_rangeinfo)
192 #define COMEDI_CMD _IOR(CIO,9,comedi_cmd)
193 #define COMEDI_CMDTEST _IOR(CIO,10,comedi_cmd)
194 #define COMEDI_INSNLIST _IOR(CIO,11,comedi_insnlist)
195 #define COMEDI_INSN _IOR(CIO,12,comedi_insn)
196 #define COMEDI_BUFCONFIG _IOR(CIO,13,comedi_bufconfig)
197 #define COMEDI_BUFINFO _IOWR(CIO,14,comedi_bufinfo)
198 #define COMEDI_POLL _IO(CIO,15)
203 typedef struct comedi_trig_struct comedi_trig;
204 typedef struct comedi_cmd_struct comedi_cmd;
205 typedef struct comedi_insn_struct comedi_insn;
206 typedef struct comedi_insnlist_struct comedi_insnlist;
207 typedef struct comedi_chaninfo_struct comedi_chaninfo;
208 typedef struct comedi_subdinfo_struct comedi_subdinfo;
209 typedef struct comedi_devinfo_struct comedi_devinfo;
210 typedef struct comedi_devconfig_struct comedi_devconfig;
211 typedef struct comedi_rangeinfo_struct comedi_rangeinfo;
212 typedef struct comedi_krange_struct comedi_krange;
213 typedef struct comedi_bufconfig_struct comedi_bufconfig;
214 typedef struct comedi_bufinfo_struct comedi_bufinfo;
216 struct comedi_trig_struct{
217 unsigned int subdev; /* subdevice */
218 unsigned int mode; /* mode */
220 unsigned int n_chan; /* number of channels */
221 unsigned int *chanlist; /* channel/range list */
222 sampl_t *data; /* data list, size depends on subd flags */
223 unsigned int n; /* number of scans */
224 unsigned int trigsrc;
225 unsigned int trigvar;
226 unsigned int trigvar1;
227 unsigned int data_len;
228 unsigned int unused[3];
231 struct comedi_insn_struct{
236 unsigned int chanspec;
237 unsigned int unused[3];
240 struct comedi_insnlist_struct{
241 unsigned int n_insns;
245 struct comedi_cmd_struct{
249 unsigned int start_src;
250 unsigned int start_arg;
252 unsigned int scan_begin_src;
253 unsigned int scan_begin_arg;
255 unsigned int convert_src;
256 unsigned int convert_arg;
258 unsigned int scan_end_src;
259 unsigned int scan_end_arg;
261 unsigned int stop_src;
262 unsigned int stop_arg;
264 unsigned int *chanlist; /* channel/range list */
265 unsigned int chanlist_len;
267 sampl_t *data; /* data list, size depends on subd flags */
268 unsigned int data_len;
271 struct comedi_chaninfo_struct{
273 lsampl_t *maxdata_list;
274 unsigned int *flaglist;
275 unsigned int *rangelist;
276 unsigned int unused[4];
279 struct comedi_rangeinfo_struct{
280 unsigned int range_type;
284 struct comedi_krange_struct{
285 int min; /* fixed point, multiply by 1e-6 */
286 int max; /* fixed point, multiply by 1e-6 */
290 struct comedi_subdinfo_struct{
293 unsigned int subd_flags;
294 unsigned int timer_type;
295 unsigned int len_chanlist;
297 unsigned int flags; /* channel flags */
298 unsigned int range_type; /* lookup in kernel */
299 unsigned int unused[10];
302 struct comedi_devinfo_struct{
303 unsigned int version_code;
304 unsigned int n_subdevs;
305 char driver_name[COMEDI_NAMELEN];
306 char board_name[COMEDI_NAMELEN];
312 struct comedi_devconfig_struct{
313 char board_name[COMEDI_NAMELEN];
314 int options[COMEDI_NDEVCONFOPTS];
317 struct comedi_bufconfig_struct{
318 unsigned int subdevice;
321 unsigned int maximum_size;
324 unsigned int unused[4];
327 struct comedi_bufinfo_struct{
328 unsigned int subdevice;
329 unsigned int bytes_read;
331 unsigned int buf_int_ptr;
332 unsigned int buf_user_ptr;
333 unsigned int buf_int_count;
334 unsigned int buf_user_count;
336 unsigned int unused[5];
341 #define __RANGE(a,b) ((((a)&0xffff)<<16)|((b)&0xffff))
343 #define RANGE_OFFSET(a) (((a)>>16)&0xffff)
344 #define RANGE_LENGTH(b) ((b)&0xffff)
346 #define RF_UNIT(flags) ((flags)&0xff)
347 #define RF_EXTERNAL (1<<8)
355 /* only relevant to kernel modules. */
357 #define COMEDI_CB_EOS 1 /* end of scan */
358 #define COMEDI_CB_EOA 2 /* end of acquisition */
359 #define COMEDI_CB_BLOCK 4 /* convenient block size */
360 #define COMEDI_CB_EOBUF 8 /* end of buffer */
361 #define COMEDI_CB_ERROR 16 /* card error during acquisition */
368 #endif /* _COMEDI_H */