2 * Header for general data acquisition definitions.
7 #ifndef _SYS_DATAACQ_H_
8 #define _SYS_DATAACQ_H_
10 #include <sys/ioccom.h>
12 /* Period in microseconds between analog I/O samples.
14 #define AD_MICRO_PERIOD_SET _IOW('A', 1, long)
15 #define AD_MICRO_PERIOD_GET _IOR('A', 2, long)
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.
20 * AD_NGAINS_GET: Return the number of gains the board supports
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.
26 * AD_GAINS_SET: Set the gain list. The driver will copy in "ngains" ints.
28 * AD_GAINS_GET: Get the gain list. The driver will copy out "ngains" ints.
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)
37 #endif /* !_SYS_DATAACQ_H_ */