include/analogy/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...
Defines
#define	A4L_CHAN_GLOBAL   0x10
	Internal use flag (must not be used by driver developer)
#define	A4L_RNG_FACTOR   1000000
	Constant for internal use only (must not be used by driver developer).
#define	A4L_RNG_VOLT_UNIT   0x0
	Volt unit range flag.
#define	A4L_RNG_MAMP_UNIT   0x1
	MilliAmpere unit range flag.
#define	A4L_RNG_NO_UNIT   0x2
	No unit range flag.
#define	A4L_RNG_EXT_UNIT   0x4
	External unit range flag.
#define	A4L_RNG_UNIT(x)
	Macro to retrieve the range unit from the range flags.
#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.

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Detailed Description

Analogy for Linux, channel, range related features.

Copyright (C) 1997-2000 David A. Schleef <[email protected]> Copyright (C) 2008 Alexis Berlemont <[email protected]>

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