Analogy for Linux, driver facilities. More...

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Data Structures
struct	a4l_cmd_desc
	Structure describing the asynchronous instruction. More...

Macros
ANALOGY_CMD_xxx
Common command flags definitions
#define	A4L_CMD_SIMUL 0x1
	Do not execute the command, just check it.

#define	A4L_CMD_BULK 0x2
	Perform data recovery / transmission in bulk mode.

#define	A4L_CMD_WRITE 0x4
	Perform a command which will write data to the device.

TRIG_xxx
Command triggers flags definitions
#define	TRIG_NONE 0x00000001
	Never trigger.

#define	TRIG_NOW 0x00000002
	Trigger now + N ns.

#define	TRIG_FOLLOW 0x00000004
	Trigger on next lower level trig.

#define	TRIG_TIME 0x00000008
	Trigger at time N ns.

#define	TRIG_TIMER 0x00000010
	Trigger at rate N ns.

#define	TRIG_COUNT 0x00000020
	Trigger when count reaches N.

#define	TRIG_EXT 0x00000040
	Trigger on external signal N.

#define	TRIG_INT 0x00000080
	Trigger on analogy-internal signal N.

#define	TRIG_OTHER 0x00000100
	Driver defined trigger.

#define	TRIG_WAKE_EOS 0x0020
	Wake up on end-of-scan.

#define	TRIG_ROUND_MASK 0x00030000
	Trigger not implemented yet.

#define	TRIG_ROUND_NEAREST 0x00000000
	Trigger not implemented yet.

#define	TRIG_ROUND_DOWN 0x00010000
	Trigger not implemented yet.

#define	TRIG_ROUND_UP 0x00020000
	Trigger not implemented yet.

#define	TRIG_ROUND_UP_NEXT 0x00030000
	Trigger not implemented yet.

Channel macros
Specific precompilation macros and constants useful for the channels descriptors tab located in the command structure
#define	CHAN(a) ((a) & 0xffff)
	Channel indication macro.

#define	RNG(a) (((a) & 0xff) << 16)
	Range definition macro.

#define	AREF(a) (((a) & 0xf) << 24)
	Reference definition macro.

#define	FLAGS(a) ((a) & CR_FLAGS_MASK)
	Flags definition macro.

#define	PACK(a, b, c) (CHAN(a) \| RNG(b) \| AREF(c))
	Channel + range + reference definition macro.

#define	PACK_FLAGS(a, b, c, d) (CHAN(a) \| RNG(b) \| AREF(c) \| FLAGS(d))
	Channel + range + reference + flags definition macro.

#define	AREF_GROUND 0x00
	Analog reference is analog ground.

#define	AREF_COMMON 0x01
	Analog reference is analog common.

#define	AREF_DIFF 0x02
	Analog reference is differential.

#define	AREF_OTHER 0x03
	Analog reference is undefined.

Detailed Description

Analogy for Linux, driver facilities.

Note: 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

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