comedi command: data in kernel space

I use comedi command in kernel space with National Instrument boards. 
How I get the data?

I have made the following instructions:

memset(cmd, 0, sizeof(*cmd));

 /* the subdevice that the command is sent to */
  cmd->subdev = subDevNum;

 /* flags */
  cmd->flags = 0;
  cmd->start_src =    TRIG_NOW;
  cmd->start_arg =    0;
  cmd->scan_begin_src =   TRIG_TIMER;
  cmd->scan_begin_arg =   1e9/freq;       /* in ns */
  cmd->convert_src =  TRIG_TIMER;
  cmd->convert_arg =  1;      /* in ns */
  cmd->scan_end_src = TRIG_COUNT;
  cmd->scan_end_arg = 4;     /* number of channels */
  cmd->stop_src =     TRIG_NONE;
  cmd->stop_arg =     0;
  cmd->chanlist =     chanlist;
  cmd->chanlist_len = 4;

  /* start the command */
  ret = comedi_command(dev, cmd);

  How I can get the data in kernel space?

Markus Dostal


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Received on 2002-10-18Z10:32:18