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FreeBSD/Linux Kernel Cross Reference
sys/sys/dataacq.h

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    1 /*
    2  * Header for general data acquisition definitions.
    3  *
    4  * $FreeBSD: src/sys/sys/dataacq.h,v 1.5 2000/05/01 20:11:13 peter Exp $
    5  */
    6 
    7 #ifndef _SYS_DATAACQ_H_
    8 #define _SYS_DATAACQ_H_
    9 
   10 #include <sys/ioccom.h>
   11 
   12 /* Period in microseconds between analog I/O samples.
   13  */
   14 #define AD_MICRO_PERIOD_SET _IOW('A', 1, long)
   15 #define AD_MICRO_PERIOD_GET _IOR('A', 2, long)
   16 
   17 /* Gain list support.  Initially all gains are 1.  If the board
   18  * supports no gains at all then AD_NGAINS_GET will return a 0.
   19  *
   20  * AD_NGAINS_GET: Return the number of gains the board supports
   21  *
   22  * AD_SUPPORTED_GAINS: Get the supported gains.
   23  * The driver will copy out "ngains" doubles,
   24  * where "ngains" is obtained with AD_NGAINS_GET.
   25  *
   26  * AD_GAINS_SET: Set the gain list.  The driver will copy in "ngains" ints.
   27  *
   28  * AD_GAINS_GET: Get the gain list.  The driver will copy out "ngains" ints.
   29  */
   30 
   31 #define AD_NGAINS_GET     _IOR('A', 3, int)
   32 #define AD_NCHANS_GET     _IOR('A', 4, int)
   33 #define AD_SUPPORTED_GAINS _IO('A', 5)
   34 #define AD_GAINS_SET       _IO('A', 6)
   35 #define AD_GAINS_GET       _IO('A', 7)
   36 
   37 #endif /* !_SYS_DATAACQ_H_ */

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