include/analogy/channel_range.h File Reference

Detailed Description

Analogy for Linux, channel, range related features.

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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.


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.