Xenomai  3.0.8
channel_range.h File Reference

Analogy for Linux, channel, range related features. More...

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Data Structures

struct  a4l_channel
 Structure describing some channel's characteristics. More...
 
struct  a4l_channels_desc
 Structure describing a channels set. More...
 
struct  a4l_range
 Structure describing a (unique) range. More...
 

Macros

#define A4L_CHAN_GLOBAL   0x10
 Internal use flag (must not be used by driver developer)
 
#define A4L_RNG_GLOBAL   0x8
 Internal use flag (must not be used by driver developer)
 
#define RANGE(x, y)
 Macro to declare a (unique) range with no unit defined.
 
#define RANGE_V(x, y)
 Macro to declare a (unique) range in Volt.
 
#define RANGE_mA(x, y)
 Macro to declare a (unique) range in milliAmpere.
 
#define RANGE_ext(x, y)
 Macro to declare a (unique) range in some external reference.
 
#define A4L_RNG_GLOBAL_RNGDESC   0
 Constant to define a ranges descriptor as global (inter-channel)
 
#define A4L_RNG_PERCHAN_RNGDESC   1
 Constant to define a ranges descriptor as specific for a channel.
 
#define RNG_GLOBAL(x)
 Macro to declare a ranges global descriptor in one line.
 
Channel reference

Flags to define the channel's reference

#define A4L_CHAN_AREF_GROUND   0x1
 Ground reference.
 
#define A4L_CHAN_AREF_COMMON   0x2
 Common reference.
 
#define A4L_CHAN_AREF_DIFF   0x4
 Differential reference.
 
#define A4L_CHAN_AREF_OTHER   0x8
 Misc reference.
 
Channels declaration mode

Constant to define whether the channels in a descriptor are identical

#define A4L_CHAN_GLOBAL_CHANDESC   0
 Global declaration, the set contains channels with similar characteristics.
 
#define A4L_CHAN_PERCHAN_CHANDESC   1
 Per channel declaration, the decriptor gathers differents channels.
 

Detailed Description

Analogy for Linux, channel, range related features.

Copyright (C) 1997-2000 David A. Schleef ds@sc.nosp@m.hlee.nosp@m.f.org Copyright (C) 2008 Alexis Berlemont alexi.nosp@m.s.be.nosp@m.rlemo.nosp@m.nt@f.nosp@m.ree.f.nosp@m.r

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