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_FACTOR 1000000
	Constant for internal use only (must not be used by driver developer). More...

#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.

Detailed Description

Analogy for Linux, channel, range related features.

Xenomai is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Xenomai is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Xenomai; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

Data Structures

Macros

Detailed Description