Provided by: libcomedi-dev_0.8.1-5ubuntu6_amd64 bug

NAME

       comedi_get_subdevice_flags - properties of subdevice

SYNOPSIS

       #include <comedilib.h>

       int comedi_get_subdevice_flags (comedi_t * device, unsigned int subdevice);

DESCRIPTION

       This  function  returns a bitfield describing the capabilities of the specified subdevice.
       If there is an error, -1 is returned, and the Comedilib error value is set.

       "SUBDEVICE  FLAGS"   Subdevice   FlagValue   (hexadecimal)DescriptionSDF_BUSY0x00000001The
       subdevice  is  busy  performing  an  asynchronous  command.   A  subdevice being "busy" is
       slightly different from the "running" state flagged by SDF_RUNNING.  A "running" subdevice
       is  always  "busy",  but  a  "busy"  subdevice is not necessarily "running".  For example,
       suppose an analog input command has been completed by the hardware, but  there  are  still
       samples  in  Comedi's  buffer  waiting to be read out.  In this case, the subdevice is not
       "running", but is still "busy" until all the samples are read out  or  comedi_cancel()  is
       called.SDF_BUSY_OWNER0x00000002The  subdevice is "busy", and the command it is running was
       started by the  current  process.SDF_LOCKED0x00000004The  subdevice  has  been  locked  by
       comedi_lock().SDF_LOCK_OWNER0x00000008The  subdevice  is  locked,  and  was  locked by the
       current process.SDF_MAXDATA0x00000010The maximum data value for the subdevice  depends  on
       the    channel.SDF_FLAGS0x00000020The    subdevice    flags    depend   on   the   channel
       (unfinished/broken support in library).SDF_RANGETYPE0x00000040The range  type  depends  on
       the        channel.SDF_CMD0x00001000The        subdevice       supports       asynchronous
       commands.SDF_SOFT_CALIBRATED0x00002000The subdevice relies on the host to  do  calibration
       in    software.     Software    calibration    coefficients    are   determined   by   the
       comedi_soft_calibrate utility.  See the description of the  comedi_get_softcal_converter()
       function for more information.SDF_READABLE0x00010000The subdevice can be read (e.g. analog
       input).SDF_WRITABLE0x00020000The   subdevice   can   be   written    to    (e.g.    analog
       output).SDF_INTERNAL0x00040000The    subdevice    does   not   have   externally   visible
       lines.SDF_GROUND0x00100000The   subdevice   supports   AREF_GROUND.SDF_COMMON0x00200000The
       subdevice      supports      AREF_COMMON.SDF_DIFF0x00400000The      subdevice     supports
       AREF_DIFF.SDF_OTHER0x00800000The  subdevice   supports   AREF_OTHERSDF_DITHER0x01000000The
       subdevice      supports      dithering      (via      the      CR_ALT_FILTER      chanspec
       flag).SDF_DEGLITCH0x02000000The subdevice  supports  deglitching  (via  the  CR_ALT_FILTER
       chanspec  flag).SDF_RUNNING0x08000000An asynchronous command is running.  You can use this
       flag to poll for the completion of  an  output  command.SDF_LSAMPL0x10000000The  subdevice
       uses  the  32  bit  lsampl_t  type  instead of the 16 bit sampl_t for asynchronous command
       data.SDF_PACKED0x20000000The subdevice uses  bitfield  samples  for  asynchronous  command
       data,  one  bit  per  channel  (otherwise  it  uses  one sampl_t or lsampl_t per channel).
       Commonly used for digital subdevices.

                                         28 October 2007            COMEDI_GET_SUBDEVICE_FLAGS(3)