RTXI 1.3
comedi/include/linux/comedi.h
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00001 /*
00002     include/comedi.h (installed as /usr/include/comedi.h)
00003     header file for comedi
00004 
00005     COMEDI - Linux Control and Measurement Device Interface
00006     Copyright (C) 1998-2001 David A. Schleef <ds@schleef.org>
00007 
00008     This program is free software; you can redistribute it and/or modify
00009     it under the terms of the GNU Lesser General Public License as published by
00010     the Free Software Foundation; either version 2 of the License, or
00011     (at your option) any later version.
00012 
00013     This program is distributed in the hope that it will be useful,
00014     but WITHOUT ANY WARRANTY; without even the implied warranty of
00015     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016     GNU General Public License for more details.
00017 
00018     You should have received a copy of the GNU General Public License
00019     along with this program; if not, write to the Free Software
00020     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00021 
00022 */
00023 
00024 #ifndef _COMEDI_H
00025 #define _COMEDI_H
00026 
00027 #ifdef __cplusplus
00028 extern "C" {
00029 #endif
00030 
00031 /* comedi's major device number */
00032 #define COMEDI_MAJOR 98
00033 
00034 /*
00035    maximum number of minor devices.  This can be increased, although
00036    kernel structures are currently statically allocated, thus you
00037    don't want this to be much more than you actually use.
00038  */
00039 #define COMEDI_NDEVICES 16
00040 
00041 /* number of config options in the config structure */
00042 #define COMEDI_NDEVCONFOPTS 32
00043 /*length of nth chunk of firmware data*/
00044 #define COMEDI_DEVCONF_AUX_DATA3_LENGTH         25
00045 #define COMEDI_DEVCONF_AUX_DATA2_LENGTH         26
00046 #define COMEDI_DEVCONF_AUX_DATA1_LENGTH         27
00047 #define COMEDI_DEVCONF_AUX_DATA0_LENGTH         28
00048 #define COMEDI_DEVCONF_AUX_DATA_HI              29      /*most significant 32 bits of pointer address (if needed) */
00049 #define COMEDI_DEVCONF_AUX_DATA_LO              30      /*least significant 32 bits of pointer address */
00050 #define COMEDI_DEVCONF_AUX_DATA_LENGTH  31      /* total data length */
00051 
00052 /* max length of device and driver names */
00053 #define COMEDI_NAMELEN 20
00054 
00055         typedef unsigned int lsampl_t;
00056         typedef unsigned short sampl_t;
00057 
00058 /* packs and unpacks a channel/range number */
00059 
00060 #define CR_PACK(chan,rng,aref)          ( (((aref)&0x3)<<24) | (((rng)&0xff)<<16) | (chan) )
00061 #define CR_PACK_FLAGS(chan, range, aref, flags) (CR_PACK(chan, range, aref) | ((flags) & CR_FLAGS_MASK))
00062 
00063 #define CR_CHAN(a)      ((a)&0xffff)
00064 #define CR_RANGE(a)     (((a)>>16)&0xff)
00065 #define CR_AREF(a)      (((a)>>24)&0x03)
00066 
00067 #define CR_FLAGS_MASK   0xfc000000
00068 #define CR_ALT_FILTER   (1<<26)
00069 #define CR_DITHER               CR_ALT_FILTER
00070 #define CR_DEGLITCH             CR_ALT_FILTER
00071 #define CR_ALT_SOURCE   (1<<27)
00072 #define CR_EDGE (1<<30)
00073 #define CR_INVERT       (1<<31)
00074 
00075 #define AREF_GROUND     0x00    /* analog ref = analog ground */
00076 #define AREF_COMMON     0x01    /* analog ref = analog common */
00077 #define AREF_DIFF       0x02    /* analog ref = differential */
00078 #define AREF_OTHER      0x03    /* analog ref = other (undefined) */
00079 
00080 /* counters -- these are arbitrary values */
00081 #define GPCT_RESET              0x0001
00082 #define GPCT_SET_SOURCE         0x0002
00083 #define GPCT_SET_GATE           0x0004
00084 #define GPCT_SET_DIRECTION      0x0008
00085 #define GPCT_SET_OPERATION      0x0010
00086 #define GPCT_ARM                0x0020
00087 #define GPCT_DISARM             0x0040
00088 #define GPCT_GET_INT_CLK_FRQ    0x0080
00089 
00090 #define GPCT_INT_CLOCK          0x0001
00091 #define GPCT_EXT_PIN            0x0002
00092 #define GPCT_NO_GATE            0x0004
00093 #define GPCT_UP                 0x0008
00094 #define GPCT_DOWN               0x0010
00095 #define GPCT_HWUD               0x0020
00096 #define GPCT_SIMPLE_EVENT       0x0040
00097 #define GPCT_SINGLE_PERIOD      0x0080
00098 #define GPCT_SINGLE_PW          0x0100
00099 #define GPCT_CONT_PULSE_OUT     0x0200
00100 #define GPCT_SINGLE_PULSE_OUT   0x0400
00101 
00102 /* instructions */
00103 
00104 #define INSN_MASK_WRITE         0x8000000
00105 #define INSN_MASK_READ          0x4000000
00106 #define INSN_MASK_SPECIAL       0x2000000
00107 
00108 #define INSN_READ               ( 0 | INSN_MASK_READ)
00109 #define INSN_WRITE              ( 1 | INSN_MASK_WRITE)
00110 #define INSN_BITS               ( 2 | INSN_MASK_READ|INSN_MASK_WRITE)
00111 #define INSN_CONFIG             ( 3 | INSN_MASK_READ|INSN_MASK_WRITE)
00112 #define INSN_GTOD               ( 4 | INSN_MASK_READ|INSN_MASK_SPECIAL)
00113 #define INSN_WAIT               ( 5 | INSN_MASK_WRITE|INSN_MASK_SPECIAL)
00114 #define INSN_INTTRIG            ( 6 | INSN_MASK_WRITE|INSN_MASK_SPECIAL)
00115 
00116 /* trigger flags */
00117 /* These flags are used in comedi_trig structures */
00118 
00119 #define TRIG_BOGUS      0x0001  /* do the motions */
00120 #define TRIG_DITHER     0x0002  /* enable dithering */
00121 #define TRIG_DEGLITCH   0x0004  /* enable deglitching */
00122 //#define TRIG_RT       0x0008          /* perform op in real time */
00123 #define TRIG_CONFIG     0x0010  /* perform configuration, not triggering */
00124 #define TRIG_WAKE_EOS   0x0020  /* wake up on end-of-scan events */
00125 //#define TRIG_WRITE    0x0040          /* write to bidirectional devices */
00126 
00127 /* command flags */
00128 /* These flags are used in comedi_cmd structures */
00129 
00130 #define CMDF_PRIORITY           0x00000008      /* try to use a real-time interrupt while performing command */
00131 
00132 #define TRIG_RT         CMDF_PRIORITY   /* compatibility definition */
00133 
00134 #define CMDF_WRITE              0x00000040
00135 #define TRIG_WRITE      CMDF_WRITE      /* compatibility definition */
00136 
00137 #define CMDF_RAWDATA            0x00000080
00138 
00139 #define COMEDI_EV_START         0x00040000
00140 #define COMEDI_EV_SCAN_BEGIN    0x00080000
00141 #define COMEDI_EV_CONVERT       0x00100000
00142 #define COMEDI_EV_SCAN_END      0x00200000
00143 #define COMEDI_EV_STOP          0x00400000
00144 
00145 #define TRIG_ROUND_MASK         0x00030000
00146 #define TRIG_ROUND_NEAREST      0x00000000
00147 #define TRIG_ROUND_DOWN         0x00010000
00148 #define TRIG_ROUND_UP           0x00020000
00149 #define TRIG_ROUND_UP_NEXT      0x00030000
00150 
00151 /* trigger sources */
00152 
00153 #define TRIG_ANY        0xffffffff
00154 #define TRIG_INVALID    0x00000000
00155 
00156 #define TRIG_NONE       0x00000001      /* never trigger */
00157 #define TRIG_NOW        0x00000002      /* trigger now + N ns */
00158 #define TRIG_FOLLOW     0x00000004      /* trigger on next lower level trig */
00159 #define TRIG_TIME       0x00000008      /* trigger at time N ns */
00160 #define TRIG_TIMER      0x00000010      /* trigger at rate N ns */
00161 #define TRIG_COUNT      0x00000020      /* trigger when count reaches N */
00162 #define TRIG_EXT        0x00000040      /* trigger on external signal N */
00163 #define TRIG_INT        0x00000080      /* trigger on comedi-internal signal N */
00164 #define TRIG_OTHER      0x00000100      /* driver defined */
00165 
00166 /* subdevice flags */
00167 
00168 #define SDF_BUSY        0x0001  /* device is busy */
00169 #define SDF_BUSY_OWNER  0x0002  /* device is busy with your job */
00170 #define SDF_LOCKED      0x0004  /* subdevice is locked */
00171 #define SDF_LOCK_OWNER  0x0008  /* you own lock */
00172 #define SDF_MAXDATA     0x0010  /* maxdata depends on channel */
00173 #define SDF_FLAGS       0x0020  /* flags depend on channel */
00174 #define SDF_RANGETYPE   0x0040  /* range type depends on channel */
00175 #define SDF_MODE0       0x0080  /* can do mode 0 */
00176 #define SDF_MODE1       0x0100  /* can do mode 1 */
00177 #define SDF_MODE2       0x0200  /* can do mode 2 */
00178 #define SDF_MODE3       0x0400  /* can do mode 3 */
00179 #define SDF_MODE4       0x0800  /* can do mode 4 */
00180 #define SDF_CMD         0x1000  /* can do commands (deprecated) */
00181 #define SDF_SOFT_CALIBRATED     0x2000  /* subdevice uses software calibration */
00182 #define SDF_CMD_WRITE           0x4000  /* can do output commands */
00183 #define SDF_CMD_READ            0x8000  /* can do input commands */
00184 
00185 #define SDF_READABLE    0x00010000      /* subdevice can be read (e.g. analog input) */
00186 #define SDF_WRITABLE    0x00020000      /* subdevice can be written (e.g. analog output) */
00187 #define SDF_WRITEABLE   SDF_WRITABLE    /* spelling error in API */
00188 #define SDF_INTERNAL    0x00040000      /* subdevice does not have externally visible lines */
00189 #define SDF_RT          0x00080000      /* DEPRECATED: subdevice is RT capable */
00190 #define SDF_GROUND      0x00100000      /* can do aref=ground */
00191 #define SDF_COMMON      0x00200000      /* can do aref=common */
00192 #define SDF_DIFF        0x00400000      /* can do aref=diff */
00193 #define SDF_OTHER       0x00800000      /* can do aref=other */
00194 #define SDF_DITHER      0x01000000      /* can do dithering */
00195 #define SDF_DEGLITCH    0x02000000      /* can do deglitching */
00196 #define SDF_MMAP        0x04000000      /* can do mmap() */
00197 #define SDF_RUNNING     0x08000000      /* subdevice is acquiring data */
00198 #define SDF_LSAMPL      0x10000000      /* subdevice uses 32-bit samples */
00199 #define SDF_PACKED      0x20000000      /* subdevice can do packed DIO */
00200 /* re recyle these flags for PWM */
00201 #define SDF_PWM_COUNTER SDF_MODE0       /* PWM can automatically switch off */
00202 #define SDF_PWM_HBRIDGE SDF_MODE1       /* PWM is signed (H-bridge) */
00203 
00204 
00205 
00206 /* subdevice types */
00207 
00208         enum comedi_subdevice_type {
00209                 COMEDI_SUBD_UNUSED,     /* unused by driver */
00210                 COMEDI_SUBD_AI, /* analog input */
00211                 COMEDI_SUBD_AO, /* analog output */
00212                 COMEDI_SUBD_DI, /* digital input */
00213                 COMEDI_SUBD_DO, /* digital output */
00214                 COMEDI_SUBD_DIO,        /* digital input/output */
00215                 COMEDI_SUBD_COUNTER,    /* counter */
00216                 COMEDI_SUBD_TIMER,      /* timer */
00217                 COMEDI_SUBD_MEMORY,     /* memory, EEPROM, DPRAM */
00218                 COMEDI_SUBD_CALIB,      /* calibration DACs */
00219                 COMEDI_SUBD_PROC,       /* processor, DSP */
00220                 COMEDI_SUBD_SERIAL,     /* serial IO */
00221                 COMEDI_SUBD_PWM         /* PWM */
00222         };
00223 
00224 /* configuration instructions */
00225 
00226         enum configuration_ids {
00227                 INSN_CONFIG_DIO_INPUT = 0,
00228                 INSN_CONFIG_DIO_OUTPUT = 1,
00229                 INSN_CONFIG_DIO_OPENDRAIN = 2,
00230                 INSN_CONFIG_ANALOG_TRIG = 16,
00231 //      INSN_CONFIG_WAVEFORM = 17,
00232 //      INSN_CONFIG_TRIG = 18,
00233 //      INSN_CONFIG_COUNTER = 19,
00234                 INSN_CONFIG_ALT_SOURCE = 20,
00235                 INSN_CONFIG_DIGITAL_TRIG = 21,
00236                 INSN_CONFIG_BLOCK_SIZE = 22,
00237                 INSN_CONFIG_TIMER_1 = 23,
00238                 INSN_CONFIG_FILTER = 24,
00239                 INSN_CONFIG_CHANGE_NOTIFY = 25,
00240 
00241                  /*ALPHA*/ INSN_CONFIG_SERIAL_CLOCK = 26,
00242                 INSN_CONFIG_BIDIRECTIONAL_DATA = 27,
00243                 INSN_CONFIG_DIO_QUERY = 28,
00244                 INSN_CONFIG_PWM_OUTPUT = 29,
00245                 INSN_CONFIG_GET_PWM_OUTPUT = 30,
00246                 INSN_CONFIG_ARM = 31,
00247                 INSN_CONFIG_DISARM = 32,
00248                 INSN_CONFIG_GET_COUNTER_STATUS = 33,
00249                 INSN_CONFIG_RESET = 34,
00250                 INSN_CONFIG_GPCT_SINGLE_PULSE_GENERATOR = 1001, // Use CTR as single pulsegenerator
00251                 INSN_CONFIG_GPCT_PULSE_TRAIN_GENERATOR = 1002,  // Use CTR as pulsetraingenerator
00252                 INSN_CONFIG_GPCT_QUADRATURE_ENCODER = 1003,     // Use the counter as encoder
00253                 INSN_CONFIG_SET_GATE_SRC = 2001,        // Set gate source
00254                 INSN_CONFIG_GET_GATE_SRC = 2002,        // Get gate source
00255                 INSN_CONFIG_SET_CLOCK_SRC = 2003,       // Set master clock source
00256                 INSN_CONFIG_GET_CLOCK_SRC = 2004,       // Get master clock source
00257                 INSN_CONFIG_SET_OTHER_SRC = 2005,       // Set other source
00258 //      INSN_CONFIG_GET_OTHER_SRC = 2006,       // Get other source
00259                 INSN_CONFIG_GET_HARDWARE_BUFFER_SIZE = 2006,    // Get size in bytes of subdevice's on-board fifos used during streaming input/output
00260                 INSN_CONFIG_SET_COUNTER_MODE = 4097,
00261                 INSN_CONFIG_8254_SET_MODE = INSN_CONFIG_SET_COUNTER_MODE,       /* deprecated */
00262                 INSN_CONFIG_8254_READ_STATUS = 4098,
00263                 INSN_CONFIG_SET_ROUTING = 4099,
00264                 INSN_CONFIG_GET_ROUTING = 4109,
00265 /* PWM */
00266                 INSN_CONFIG_PWM_SET_PERIOD = 5000,   /* sets frequency */
00267                 INSN_CONFIG_PWM_GET_PERIOD = 5001,   /* gets frequency */
00268                 INSN_CONFIG_GET_PWM_STATUS = 5002,          /* is it running? */
00269                 INSN_CONFIG_PWM_SET_H_BRIDGE = 5003, /* sets H bridge: duty cycle and sign bit for a relay  at the same time*/
00270                 INSN_CONFIG_PWM_GET_H_BRIDGE = 5004  /* gets H bridge data: duty cycle and the sign bit */
00271         };
00272 
00273         enum comedi_io_direction {
00274                 COMEDI_INPUT = 0,
00275                 COMEDI_OUTPUT = 1,
00276                 COMEDI_OPENDRAIN = 2
00277         };
00278 
00279         enum comedi_support_level
00280         {
00281                 COMEDI_UNKNOWN_SUPPORT = 0,
00282                 COMEDI_SUPPORTED,
00283                 COMEDI_UNSUPPORTED
00284         };
00285 
00286 /* ioctls */
00287 
00288 #define CIO 'd'
00289 #define COMEDI_DEVCONFIG _IOW(CIO,0,comedi_devconfig)
00290 #define COMEDI_DEVINFO _IOR(CIO,1,comedi_devinfo)
00291 #define COMEDI_SUBDINFO _IOR(CIO,2,comedi_subdinfo)
00292 #define COMEDI_CHANINFO _IOR(CIO,3,comedi_chaninfo)
00293 #define COMEDI_TRIG _IOWR(CIO,4,comedi_trig)
00294 #define COMEDI_LOCK _IO(CIO,5)
00295 #define COMEDI_UNLOCK _IO(CIO,6)
00296 #define COMEDI_CANCEL _IO(CIO,7)
00297 #define COMEDI_RANGEINFO _IOR(CIO,8,comedi_rangeinfo)
00298 #define COMEDI_CMD _IOR(CIO,9,comedi_cmd)
00299 #define COMEDI_CMDTEST _IOR(CIO,10,comedi_cmd)
00300 #define COMEDI_INSNLIST _IOR(CIO,11,comedi_insnlist)
00301 #define COMEDI_INSN _IOR(CIO,12,comedi_insn)
00302 #define COMEDI_BUFCONFIG _IOR(CIO,13,comedi_bufconfig)
00303 #define COMEDI_BUFINFO _IOWR(CIO,14,comedi_bufinfo)
00304 #define COMEDI_POLL _IO(CIO,15)
00305 
00306 /* structures */
00307 
00308         typedef struct comedi_trig_struct comedi_trig;
00309         typedef struct comedi_cmd_struct comedi_cmd;
00310         typedef struct comedi_insn_struct comedi_insn;
00311         typedef struct comedi_insnlist_struct comedi_insnlist;
00312         typedef struct comedi_chaninfo_struct comedi_chaninfo;
00313         typedef struct comedi_subdinfo_struct comedi_subdinfo;
00314         typedef struct comedi_devinfo_struct comedi_devinfo;
00315         typedef struct comedi_devconfig_struct comedi_devconfig;
00316         typedef struct comedi_rangeinfo_struct comedi_rangeinfo;
00317         typedef struct comedi_krange_struct comedi_krange;
00318         typedef struct comedi_bufconfig_struct comedi_bufconfig;
00319         typedef struct comedi_bufinfo_struct comedi_bufinfo;
00320 
00321         struct comedi_trig_struct {
00322                 unsigned int subdev;    /* subdevice */
00323                 unsigned int mode;      /* mode */
00324                 unsigned int flags;
00325                 unsigned int n_chan;    /* number of channels */
00326                 unsigned int *chanlist; /* channel/range list */
00327                 sampl_t *data;  /* data list, size depends on subd flags */
00328                 unsigned int n; /* number of scans */
00329                 unsigned int trigsrc;
00330                 unsigned int trigvar;
00331                 unsigned int trigvar1;
00332                 unsigned int data_len;
00333                 unsigned int unused[3];
00334         };
00335 
00336         struct comedi_insn_struct {
00337                 unsigned int insn;
00338                 unsigned int n;
00339                 lsampl_t *data;
00340                 unsigned int subdev;
00341                 unsigned int chanspec;
00342                 unsigned int unused[3];
00343         };
00344 
00345         struct comedi_insnlist_struct {
00346                 unsigned int n_insns;
00347                 comedi_insn *insns;
00348         };
00349 
00350         struct comedi_cmd_struct {
00351                 unsigned int subdev;
00352                 unsigned int flags;
00353 
00354                 unsigned int start_src;
00355                 unsigned int start_arg;
00356 
00357                 unsigned int scan_begin_src;
00358                 unsigned int scan_begin_arg;
00359 
00360                 unsigned int convert_src;
00361                 unsigned int convert_arg;
00362 
00363                 unsigned int scan_end_src;
00364                 unsigned int scan_end_arg;
00365 
00366                 unsigned int stop_src;
00367                 unsigned int stop_arg;
00368 
00369                 unsigned int *chanlist; /* channel/range list */
00370                 unsigned int chanlist_len;
00371 
00372                 sampl_t *data;  /* data list, size depends on subd flags */
00373                 unsigned int data_len;
00374         };
00375 
00376         struct comedi_chaninfo_struct {
00377                 unsigned int subdev;
00378                 lsampl_t *maxdata_list;
00379                 unsigned int *flaglist;
00380                 unsigned int *rangelist;
00381                 unsigned int unused[4];
00382         };
00383 
00384         struct comedi_rangeinfo_struct {
00385                 unsigned int range_type;
00386                 void *range_ptr;
00387         };
00388 
00389         struct comedi_krange_struct {
00390                 int min;        /* fixed point, multiply by 1e-6 */
00391                 int max;        /* fixed point, multiply by 1e-6 */
00392                 unsigned int flags;
00393         };
00394 
00395 
00396         struct comedi_subdinfo_struct {
00397                 unsigned int type;
00398                 unsigned int n_chan;
00399                 unsigned int subd_flags;
00400                 unsigned int timer_type;
00401                 unsigned int len_chanlist;
00402                 lsampl_t maxdata;
00403                 unsigned int flags;     /* channel flags */
00404                 unsigned int range_type;        /* lookup in kernel */
00405                 unsigned int settling_time_0;
00406                 unsigned insn_bits_support;     /* see support_level enum for values*/
00407                 unsigned int unused[8];
00408         };
00409 
00410         struct comedi_devinfo_struct {
00411                 unsigned int version_code;
00412                 unsigned int n_subdevs;
00413                 char driver_name[COMEDI_NAMELEN];
00414                 char board_name[COMEDI_NAMELEN];
00415                 int read_subdevice;
00416                 int write_subdevice;
00417                 int unused[30];
00418         };
00419 
00420         struct comedi_devconfig_struct {
00421                 char board_name[COMEDI_NAMELEN];
00422                 int options[COMEDI_NDEVCONFOPTS];
00423         };
00424 
00425         struct comedi_bufconfig_struct {
00426                 unsigned int subdevice;
00427                 unsigned int flags;
00428 
00429                 unsigned int maximum_size;
00430                 unsigned int size;
00431 
00432                 unsigned int unused[4];
00433         };
00434 
00435         struct comedi_bufinfo_struct {
00436                 unsigned int subdevice;
00437                 unsigned int bytes_read;
00438 
00439                 unsigned int buf_write_ptr;
00440                 unsigned int buf_read_ptr;
00441                 unsigned int buf_write_count;
00442                 unsigned int buf_read_count;
00443 
00444                 unsigned int bytes_written;
00445 
00446                 unsigned int unused[4];
00447         };
00448 
00449 /* range stuff */
00450 
00451 #define __RANGE(a,b)    ((((a)&0xffff)<<16)|((b)&0xffff))
00452 
00453 #define RANGE_OFFSET(a)         (((a)>>16)&0xffff)
00454 #define RANGE_LENGTH(b)         ((b)&0xffff)
00455 
00456 #define RF_UNIT(flags)          ((flags)&0xff)
00457 #define RF_EXTERNAL             (1<<8)
00458 
00459 #define UNIT_volt               0
00460 #define UNIT_mA                 1
00461 #define UNIT_none               2
00462 
00463 #define COMEDI_MIN_SPEED        ((unsigned int)0xffffffff)
00464 
00465 /* callback stuff */
00466 /* only relevant to kernel modules. */
00467 
00468 #define COMEDI_CB_EOS           1       /* end of scan */
00469 #define COMEDI_CB_EOA           2       /* end of acquisition */
00470 #define COMEDI_CB_BLOCK         4       /* DEPRECATED: convenient block size */
00471 #define COMEDI_CB_EOBUF         8       /* DEPRECATED: end of buffer */
00472 #define COMEDI_CB_ERROR         16      /* card error during acquisition */
00473 #define COMEDI_CB_OVERFLOW      32      /* buffer overflow/underflow */
00474 
00475 /**********************************************************/
00476 /* everything after this line is ALPHA */
00477 /**********************************************************/
00478 
00479 /*
00480   8254 specific configuration.
00481 
00482   It supports two config commands:
00483 
00484   0 ID: INSN_CONFIG_SET_COUNTER_MODE
00485   1 8254 Mode
00486     I8254_MODE0, I8254_MODE1, ..., I8254_MODE5
00487     OR'ed with:
00488     I8254_BCD, I8254_BINARY
00489 
00490   0 ID: INSN_CONFIG_8254_READ_STATUS
00491   1 <-- Status byte returned here.
00492     B7=Output
00493     B6=NULL Count
00494     B5-B0 Current mode.
00495 
00496 */
00497 
00498         enum i8254_mode {
00499                 I8254_MODE0 = (0 << 1), /* Interrupt on terminal count */
00500                 I8254_MODE1 = (1 << 1), /* Hardware retriggerable one-shot */
00501                 I8254_MODE2 = (2 << 1), /* Rate generator */
00502                 I8254_MODE3 = (3 << 1), /* Square wave mode */
00503                 I8254_MODE4 = (4 << 1), /* Software triggered strobe */
00504                 I8254_MODE5 = (5 << 1), /* Hardware triggered strobe (retriggerable) */
00505                 I8254_BCD = 1,  /* use binary-coded decimal instead of binary (pretty useless) */
00506                 I8254_BINARY = 0
00507         };
00508 
00509         static inline unsigned NI_USUAL_PFI_SELECT(unsigned pfi_channel) {
00510                 if (pfi_channel < 10)
00511                         return 0x1 + pfi_channel;
00512                 else
00513                         return 0xb + pfi_channel;
00514         } static inline unsigned NI_USUAL_RTSI_SELECT(unsigned rtsi_channel) {
00515                 if (rtsi_channel < 7)
00516                         return 0xb + rtsi_channel;
00517                 else
00518                         return 0x1b;
00519         }
00520 /* mode bits for NI general-purpose counters, set with INSN_CONFIG_SET_COUNTER_MODE */
00521 #define NI_GPCT_COUNTING_MODE_SHIFT 16
00522 #define NI_GPCT_INDEX_PHASE_BITSHIFT 20
00523 #define NI_GPCT_COUNTING_DIRECTION_SHIFT 24
00524         enum ni_gpct_mode_bits {
00525                 NI_GPCT_GATE_ON_BOTH_EDGES_BIT = 0x4,
00526                 NI_GPCT_EDGE_GATE_MODE_MASK = 0x18,
00527                 NI_GPCT_EDGE_GATE_STARTS_STOPS_BITS = 0x0,
00528                 NI_GPCT_EDGE_GATE_STOPS_STARTS_BITS = 0x8,
00529                 NI_GPCT_EDGE_GATE_STARTS_BITS = 0x10,
00530                 NI_GPCT_EDGE_GATE_NO_STARTS_NO_STOPS_BITS = 0x18,
00531                 NI_GPCT_STOP_MODE_MASK = 0x60,
00532                 NI_GPCT_STOP_ON_GATE_BITS = 0x00,
00533                 NI_GPCT_STOP_ON_GATE_OR_TC_BITS = 0x20,
00534                 NI_GPCT_STOP_ON_GATE_OR_SECOND_TC_BITS = 0x40,
00535                 NI_GPCT_LOAD_B_SELECT_BIT = 0x80,
00536                 NI_GPCT_OUTPUT_MODE_MASK = 0x300,
00537                 NI_GPCT_OUTPUT_TC_PULSE_BITS = 0x100,
00538                 NI_GPCT_OUTPUT_TC_TOGGLE_BITS = 0x200,
00539                 NI_GPCT_OUTPUT_TC_OR_GATE_TOGGLE_BITS = 0x300,
00540                 NI_GPCT_HARDWARE_DISARM_MASK = 0xc00,
00541                 NI_GPCT_NO_HARDWARE_DISARM_BITS = 0x000,
00542                 NI_GPCT_DISARM_AT_TC_BITS = 0x400,
00543                 NI_GPCT_DISARM_AT_GATE_BITS = 0x800,
00544                 NI_GPCT_DISARM_AT_TC_OR_GATE_BITS = 0xc00,
00545                 NI_GPCT_LOADING_ON_TC_BIT = 0x1000,
00546                 NI_GPCT_LOADING_ON_GATE_BIT = 0x4000,
00547                 NI_GPCT_COUNTING_MODE_MASK = 0x7 << NI_GPCT_COUNTING_MODE_SHIFT,
00548                 NI_GPCT_COUNTING_MODE_NORMAL_BITS =
00549                         0x0 << NI_GPCT_COUNTING_MODE_SHIFT,
00550                 NI_GPCT_COUNTING_MODE_QUADRATURE_X1_BITS =
00551                         0x1 << NI_GPCT_COUNTING_MODE_SHIFT,
00552                 NI_GPCT_COUNTING_MODE_QUADRATURE_X2_BITS =
00553                         0x2 << NI_GPCT_COUNTING_MODE_SHIFT,
00554                 NI_GPCT_COUNTING_MODE_QUADRATURE_X4_BITS =
00555                         0x3 << NI_GPCT_COUNTING_MODE_SHIFT,
00556                 NI_GPCT_COUNTING_MODE_TWO_PULSE_BITS =
00557                         0x4 << NI_GPCT_COUNTING_MODE_SHIFT,
00558                 NI_GPCT_COUNTING_MODE_SYNC_SOURCE_BITS =
00559                         0x6 << NI_GPCT_COUNTING_MODE_SHIFT,
00560                 NI_GPCT_INDEX_PHASE_MASK = 0x3 << NI_GPCT_INDEX_PHASE_BITSHIFT,
00561                 NI_GPCT_INDEX_PHASE_LOW_A_LOW_B_BITS =
00562                         0x0 << NI_GPCT_INDEX_PHASE_BITSHIFT,
00563                 NI_GPCT_INDEX_PHASE_LOW_A_HIGH_B_BITS =
00564                         0x1 << NI_GPCT_INDEX_PHASE_BITSHIFT,
00565                 NI_GPCT_INDEX_PHASE_HIGH_A_LOW_B_BITS =
00566                         0x2 << NI_GPCT_INDEX_PHASE_BITSHIFT,
00567                 NI_GPCT_INDEX_PHASE_HIGH_A_HIGH_B_BITS =
00568                         0x3 << NI_GPCT_INDEX_PHASE_BITSHIFT,
00569                 NI_GPCT_INDEX_ENABLE_BIT = 0x400000,
00570                 NI_GPCT_COUNTING_DIRECTION_MASK =
00571                         0x3 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
00572                 NI_GPCT_COUNTING_DIRECTION_DOWN_BITS =
00573                         0x00 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
00574                 NI_GPCT_COUNTING_DIRECTION_UP_BITS =
00575                         0x1 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
00576                 NI_GPCT_COUNTING_DIRECTION_HW_UP_DOWN_BITS =
00577                         0x2 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
00578                 NI_GPCT_COUNTING_DIRECTION_HW_GATE_BITS =
00579                         0x3 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
00580                 NI_GPCT_RELOAD_SOURCE_MASK = 0xc000000,
00581                 NI_GPCT_RELOAD_SOURCE_FIXED_BITS = 0x0,
00582                 NI_GPCT_RELOAD_SOURCE_SWITCHING_BITS = 0x4000000,
00583                 NI_GPCT_RELOAD_SOURCE_GATE_SELECT_BITS = 0x8000000,
00584                 NI_GPCT_OR_GATE_BIT = 0x10000000,
00585                 NI_GPCT_INVERT_OUTPUT_BIT = 0x20000000
00586         };
00587 
00588 /* Bits for setting a clock source with
00589  * INSN_CONFIG_SET_CLOCK_SRC when using NI general-purpose counters. */
00590         enum ni_gpct_clock_source_bits {
00591                 NI_GPCT_CLOCK_SRC_SELECT_MASK = 0x3f,
00592                 NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS = 0x0,
00593                 NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS = 0x1,
00594                 NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS = 0x2,
00595                 NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS = 0x3,
00596                 NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS = 0x4,
00597                 NI_GPCT_NEXT_TC_CLOCK_SRC_BITS = 0x5,
00598                 NI_GPCT_SOURCE_PIN_i_CLOCK_SRC_BITS = 0x6,      /* NI 660x-specific */
00599                 NI_GPCT_PXI10_CLOCK_SRC_BITS = 0x7,
00600                 NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS = 0x8,
00601                 NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS = 0x9,
00602                 NI_GPCT_PRESCALE_MODE_CLOCK_SRC_MASK = 0x30000000,
00603                 NI_GPCT_NO_PRESCALE_CLOCK_SRC_BITS = 0x0,
00604                 NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS = 0x10000000,        /* divide source by 2 */
00605                 NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS = 0x20000000,        /* divide source by 8 */
00606                 NI_GPCT_INVERT_CLOCK_SRC_BIT = 0x80000000
00607         };
00608         static inline unsigned NI_GPCT_SOURCE_PIN_CLOCK_SRC_BITS(unsigned n) {  /* NI 660x-specific */
00609                 return 0x10 + n;
00610         }
00611         static inline unsigned NI_GPCT_RTSI_CLOCK_SRC_BITS(unsigned n) {
00612                 return 0x18 + n;
00613         }
00614         static inline unsigned NI_GPCT_PFI_CLOCK_SRC_BITS(unsigned n) { /* no pfi on NI 660x */
00615                 return 0x20 + n;
00616         }
00617 
00618 /* Possibilities for setting a gate source with
00619 INSN_CONFIG_SET_GATE_SRC when using NI general-purpose counters.
00620 May be bitwise-or'd with CR_EDGE or CR_INVERT. */
00621         enum ni_gpct_gate_select {
00622                 /* m-series gates */
00623                 NI_GPCT_TIMESTAMP_MUX_GATE_SELECT = 0x0,
00624                 NI_GPCT_AI_START2_GATE_SELECT = 0x12,
00625                 NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT = 0x13,
00626                 NI_GPCT_NEXT_OUT_GATE_SELECT = 0x14,
00627                 NI_GPCT_AI_START1_GATE_SELECT = 0x1c,
00628                 NI_GPCT_NEXT_SOURCE_GATE_SELECT = 0x1d,
00629                 NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT = 0x1e,
00630                 NI_GPCT_LOGIC_LOW_GATE_SELECT = 0x1f,
00631                 /* more gates for 660x */
00632                 NI_GPCT_SOURCE_PIN_i_GATE_SELECT = 0x100,
00633                 NI_GPCT_GATE_PIN_i_GATE_SELECT = 0x101,
00634                 /* more gates for 660x "second gate" */
00635                 NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT = 0x201,
00636                 NI_GPCT_SELECTED_GATE_GATE_SELECT = 0x21e,
00637                 /* m-series "second gate" sources are unknown,
00638                    we should add them here with an offset of 0x300 when known. */
00639                 NI_GPCT_DISABLED_GATE_SELECT = 0x8000,
00640         };
00641         static inline unsigned NI_GPCT_GATE_PIN_GATE_SELECT(unsigned n) {
00642                 return 0x102 + n;
00643         }
00644         static inline unsigned NI_GPCT_RTSI_GATE_SELECT(unsigned n) {
00645                 return NI_USUAL_RTSI_SELECT(n);
00646         }
00647         static inline unsigned NI_GPCT_PFI_GATE_SELECT(unsigned n) {
00648                 return NI_USUAL_PFI_SELECT(n);
00649         }
00650         static inline unsigned NI_GPCT_UP_DOWN_PIN_GATE_SELECT(unsigned n) {
00651                 return 0x202 + n;
00652         }
00653 
00654 /* Possibilities for setting a source with
00655 INSN_CONFIG_SET_OTHER_SRC when using NI general-purpose counters. */
00656         enum ni_gpct_other_index {
00657                 NI_GPCT_SOURCE_ENCODER_A,
00658                 NI_GPCT_SOURCE_ENCODER_B,
00659                 NI_GPCT_SOURCE_ENCODER_Z
00660         };
00661         enum ni_gpct_other_select {
00662                 /* m-series gates */
00663                 // Still unknown, probably only need NI_GPCT_PFI_OTHER_SELECT
00664                 NI_GPCT_DISABLED_OTHER_SELECT = 0x8000,
00665         };
00666         static inline unsigned NI_GPCT_PFI_OTHER_SELECT(unsigned n) {
00667                 return NI_USUAL_PFI_SELECT(n);
00668         }
00669 
00670 /* start sources for ni general-purpose counters for use with
00671 INSN_CONFIG_ARM */
00672         enum ni_gpct_arm_source {
00673                 NI_GPCT_ARM_IMMEDIATE = 0x0,
00674                 NI_GPCT_ARM_PAIRED_IMMEDIATE = 0x1,     /* Start both the counter and the adjacent paired counter simultaneously */
00675                 /* NI doesn't document bits for selecting hardware arm triggers.  If
00676                    the NI_GPCT_ARM_UNKNOWN bit is set, we will pass the least significant
00677                    bits (3 bits for 660x or 5 bits for m-series) through to the hardware.
00678                    This will at least allow someone to figure out what the bits do later. */
00679                 NI_GPCT_ARM_UNKNOWN = 0x1000,
00680         };
00681 
00682 /* digital filtering options for ni 660x for use with INSN_CONFIG_FILTER. */
00683         enum ni_gpct_filter_select {
00684                 NI_GPCT_FILTER_OFF = 0x0,
00685                 NI_GPCT_FILTER_TIMEBASE_3_SYNC = 0x1,
00686                 NI_GPCT_FILTER_100x_TIMEBASE_1 = 0x2,
00687                 NI_GPCT_FILTER_20x_TIMEBASE_1 = 0x3,
00688                 NI_GPCT_FILTER_10x_TIMEBASE_1 = 0x4,
00689                 NI_GPCT_FILTER_2x_TIMEBASE_1 = 0x5,
00690                 NI_GPCT_FILTER_2x_TIMEBASE_3 = 0x6
00691         };
00692 
00693 /* PFI digital filtering options for ni m-series for use with INSN_CONFIG_FILTER. */
00694         enum ni_pfi_filter_select {
00695                 NI_PFI_FILTER_OFF = 0x0,
00696                 NI_PFI_FILTER_125ns = 0x1,
00697                 NI_PFI_FILTER_6425ns = 0x2,
00698                 NI_PFI_FILTER_2550us = 0x3
00699         };
00700 
00701 /* master clock sources for ni mio boards and INSN_CONFIG_SET_CLOCK_SRC */
00702         enum ni_mio_clock_source {
00703                 NI_MIO_INTERNAL_CLOCK = 0,
00704                 NI_MIO_RTSI_CLOCK = 1,  /* doesn't work for m-series, use NI_MIO_PLL_RTSI_CLOCK() */
00705                 /* the NI_MIO_PLL_* sources are m-series only */
00706                 NI_MIO_PLL_PXI_STAR_TRIGGER_CLOCK = 2,
00707                 NI_MIO_PLL_PXI10_CLOCK = 3,
00708                 NI_MIO_PLL_RTSI0_CLOCK = 4
00709         };
00710         static inline unsigned NI_MIO_PLL_RTSI_CLOCK(unsigned rtsi_channel) {
00711                 return NI_MIO_PLL_RTSI0_CLOCK + rtsi_channel;
00712         }
00713 
00714 /* Signals which can be routed to an NI RTSI pin with INSN_CONFIG_SET_ROUTING.
00715  The numbers assigned are not arbitrary, they correspond to the bits required
00716  to program the board. */
00717         enum ni_rtsi_routing {
00718                 NI_RTSI_OUTPUT_ADR_START1 = 0,
00719                 NI_RTSI_OUTPUT_ADR_START2 = 1,
00720                 NI_RTSI_OUTPUT_SCLKG = 2,
00721                 NI_RTSI_OUTPUT_DACUPDN = 3,
00722                 NI_RTSI_OUTPUT_DA_START1 = 4,
00723                 NI_RTSI_OUTPUT_G_SRC0 = 5,
00724                 NI_RTSI_OUTPUT_G_GATE0 = 6,
00725                 NI_RTSI_OUTPUT_RGOUT0 = 7,
00726                 NI_RTSI_OUTPUT_RTSI_BRD_0 = 8,
00727                 NI_RTSI_OUTPUT_RTSI_OSC = 12    /* pre-m-series always have RTSI clock on line 7 */
00728         };
00729         static inline unsigned NI_RTSI_OUTPUT_RTSI_BRD(unsigned n) {
00730                 return NI_RTSI_OUTPUT_RTSI_BRD_0 + n;
00731         }
00732 
00733 /* Signals which can be routed to an NI PFI pin on an m-series board
00734  with INSN_CONFIG_SET_ROUTING.  These numbers are also returned
00735  by INSN_CONFIG_GET_ROUTING on pre-m-series boards, even though
00736  their routing cannot be changed.  The numbers assigned are
00737  not arbitrary, they correspond to the bits required
00738  to program the board. */
00739         enum ni_pfi_routing {
00740                 NI_PFI_OUTPUT_PFI_DEFAULT = 0,
00741                 NI_PFI_OUTPUT_AI_START1 = 1,
00742                 NI_PFI_OUTPUT_AI_START2 = 2,
00743                 NI_PFI_OUTPUT_AI_CONVERT = 3,
00744                 NI_PFI_OUTPUT_G_SRC1 = 4,
00745                 NI_PFI_OUTPUT_G_GATE1 = 5,
00746                 NI_PFI_OUTPUT_AO_UPDATE_N = 6,
00747                 NI_PFI_OUTPUT_AO_START1 = 7,
00748                 NI_PFI_OUTPUT_AI_START_PULSE = 8,
00749                 NI_PFI_OUTPUT_G_SRC0 = 9,
00750                 NI_PFI_OUTPUT_G_GATE0 = 10,
00751                 NI_PFI_OUTPUT_EXT_STROBE = 11,
00752                 NI_PFI_OUTPUT_AI_EXT_MUX_CLK = 12,
00753                 NI_PFI_OUTPUT_GOUT0 = 13,
00754                 NI_PFI_OUTPUT_GOUT1 = 14,
00755                 NI_PFI_OUTPUT_FREQ_OUT = 15,
00756                 NI_PFI_OUTPUT_PFI_DO = 16,
00757                 NI_PFI_OUTPUT_I_ATRIG = 17,
00758                 NI_PFI_OUTPUT_RTSI0 = 18,
00759                 NI_PFI_OUTPUT_PXI_STAR_TRIGGER_IN = 26,
00760                 NI_PFI_OUTPUT_SCXI_TRIG1 = 27,
00761                 NI_PFI_OUTPUT_DIO_CHANGE_DETECT_RTSI = 28,
00762                 NI_PFI_OUTPUT_CDI_SAMPLE = 29,
00763                 NI_PFI_OUTPUT_CDO_UPDATE = 30
00764         };
00765         static inline unsigned NI_PFI_OUTPUT_RTSI(unsigned rtsi_channel) {
00766                 return NI_PFI_OUTPUT_RTSI0 + rtsi_channel;
00767         }
00768 
00769 /* Signals which can be routed to output on a NI PFI pin on a 660x board
00770  with INSN_CONFIG_SET_ROUTING.  The numbers assigned are
00771  not arbitrary, they correspond to the bits required
00772  to program the board.  Lines 0 to 7 can only be set to
00773  NI_660X_PFI_OUTPUT_DIO.  Lines 32 to 39 can only be set to
00774  NI_660X_PFI_OUTPUT_COUNTER. */
00775         enum ni_660x_pfi_routing {
00776                 NI_660X_PFI_OUTPUT_COUNTER = 1, // counter
00777                 NI_660X_PFI_OUTPUT_DIO = 2,     // static digital output
00778         };
00779 
00780 /* NI External Trigger lines.  These values are not arbitrary, but are related to
00781         the bits required to program the board (offset by 1 for historical reasons). */
00782         static inline unsigned NI_EXT_PFI(unsigned pfi_channel) {
00783                 return NI_USUAL_PFI_SELECT(pfi_channel) - 1;
00784         }
00785         static inline unsigned NI_EXT_RTSI(unsigned rtsi_channel) {
00786                 return NI_USUAL_RTSI_SELECT(rtsi_channel) - 1;
00787         }
00788 
00789 /* status bits for INSN_CONFIG_GET_COUNTER_STATUS */
00790         enum comedi_counter_status_flags {
00791                 COMEDI_COUNTER_ARMED = 0x1,
00792                 COMEDI_COUNTER_COUNTING = 0x2,
00793                 COMEDI_COUNTER_TERMINAL_COUNT = 0x4,
00794         };
00795 
00796 /* Clock sources for CDIO subdevice on NI m-series boards.
00797 Used as the scan_begin_arg for a comedi_command. These
00798 sources may also be bitwise-or'd with CR_INVERT to change polarity. */
00799         enum ni_m_series_cdio_scan_begin_src {
00800                 NI_CDIO_SCAN_BEGIN_SRC_GROUND = 0,
00801                 NI_CDIO_SCAN_BEGIN_SRC_AI_START = 18,
00802                 NI_CDIO_SCAN_BEGIN_SRC_AI_CONVERT = 19,
00803                 NI_CDIO_SCAN_BEGIN_SRC_PXI_STAR_TRIGGER = 20,
00804                 NI_CDIO_SCAN_BEGIN_SRC_G0_OUT = 28,
00805                 NI_CDIO_SCAN_BEGIN_SRC_G1_OUT = 29,
00806                 NI_CDIO_SCAN_BEGIN_SRC_ANALOG_TRIGGER = 30,
00807                 NI_CDIO_SCAN_BEGIN_SRC_AO_UPDATE = 31,
00808                 NI_CDIO_SCAN_BEGIN_SRC_FREQ_OUT = 32,
00809                 NI_CDIO_SCAN_BEGIN_SRC_DIO_CHANGE_DETECT_IRQ = 33
00810         };
00811         static inline unsigned NI_CDIO_SCAN_BEGIN_SRC_PFI(unsigned pfi_channel) {
00812                 return NI_USUAL_PFI_SELECT(pfi_channel);
00813         }
00814         static inline unsigned NI_CDIO_SCAN_BEGIN_SRC_RTSI(unsigned
00815                 rtsi_channel) {
00816                 return NI_USUAL_RTSI_SELECT(rtsi_channel);
00817         }
00818 
00819 /* scan_begin_src for scan_begin_arg==TRIG_EXT with analog output command
00820 on NI boards.  These scan begin sources can also be bitwise-or'd with
00821 CR_INVERT to change polarity. */
00822         static inline unsigned NI_AO_SCAN_BEGIN_SRC_PFI(unsigned pfi_channel) {
00823                 return NI_USUAL_PFI_SELECT(pfi_channel);
00824         }
00825         static inline unsigned NI_AO_SCAN_BEGIN_SRC_RTSI(unsigned rtsi_channel) {
00826                 return NI_USUAL_RTSI_SELECT(rtsi_channel);
00827         }
00828 
00829 /* Bits for setting a clock source with
00830  * INSN_CONFIG_SET_CLOCK_SRC when using NI frequency output subdevice. */
00831         enum ni_freq_out_clock_source_bits {
00832                 NI_FREQ_OUT_TIMEBASE_1_DIV_2_CLOCK_SRC, // 10 MHz
00833                 NI_FREQ_OUT_TIMEBASE_2_CLOCK_SRC        // 100 KHz
00834         };
00835 
00836 /* Values for setting a clock source with INSN_CONFIG_SET_CLOCK_SRC for
00837  * 8254 counter subdevices on Amplicon DIO boards (amplc_dio200 driver). */
00838         enum amplc_dio_clock_source {
00839                 AMPLC_DIO_CLK_CLKN,     /* per channel external clock
00840                                            input/output pin (pin is only an
00841                                            input when clock source set to this
00842                                            value, otherwise it is an output) */
00843                 AMPLC_DIO_CLK_10MHZ,    /* 10 MHz internal clock */
00844                 AMPLC_DIO_CLK_1MHZ,     /* 1 MHz internal clock */
00845                 AMPLC_DIO_CLK_100KHZ,   /* 100 kHz internal clock */
00846                 AMPLC_DIO_CLK_10KHZ,    /* 10 kHz internal clock */
00847                 AMPLC_DIO_CLK_1KHZ,     /* 1 kHz internal clock */
00848                 AMPLC_DIO_CLK_OUTNM1,   /* output of preceding counter channel
00849                                            (for channel 0, preceding counter
00850                                            channel is channel 2 on preceding
00851                                            counter subdevice, for first counter
00852                                            subdevice, preceding counter
00853                                            subdevice is the last counter
00854                                            subdevice) */
00855                 AMPLC_DIO_CLK_EXT       /* per chip external input pin */
00856         };
00857 
00858 /* Values for setting a gate source with INSN_CONFIG_SET_GATE_SRC for
00859  * 8254 counter subdevices on Amplicon DIO boards (amplc_dio200 driver). */
00860         enum amplc_dio_gate_source {
00861                 AMPLC_DIO_GAT_VCC,      /* internal high logic level */
00862                 AMPLC_DIO_GAT_GND,      /* internal low logic level */
00863                 AMPLC_DIO_GAT_GATN,     /* per channel external gate input */
00864                 AMPLC_DIO_GAT_NOUTNM2,  /* negated output of counter channel
00865                                            minus 2 (for channels 0 or 1,
00866                                            channel minus 2 is channel 1 or 2 on
00867                                            the preceding counter subdevice, for
00868                                            the first counter subdevice the
00869                                            preceding counter subdevice is the
00870                                            last counter subdevice) */
00871                 AMPLC_DIO_GAT_RESERVED4,
00872                 AMPLC_DIO_GAT_RESERVED5,
00873                 AMPLC_DIO_GAT_RESERVED6,
00874                 AMPLC_DIO_GAT_RESERVED7
00875         };
00876 
00877 #ifdef __cplusplus
00878 }
00879 #endif
00880 
00881 #endif /* _COMEDI_H */
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