Analogy for Linux, subdevice related features. More...

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Data Structures
struct	a4l_subdevice
	Structure describing the subdevice. More...

Macros
Subdevices types
Flags to define the subdevice type
#define	A4L_SUBD_UNUSED (A4L_SUBD_MASK_SPECIAL\|0x1)
	Unused subdevice.

#define	A4L_SUBD_AI (A4L_SUBD_MASK_READ\|0x2)
	Analog input subdevice.

#define	A4L_SUBD_AO (A4L_SUBD_MASK_WRITE\|0x4)
	Analog output subdevice.

#define	A4L_SUBD_DI (A4L_SUBD_MASK_READ\|0x8)
	Digital input subdevice.

#define	A4L_SUBD_DO (A4L_SUBD_MASK_WRITE\|0x10)
	Digital output subdevice.

#define	A4L_SUBD_DIO (A4L_SUBD_MASK_SPECIAL\|0x20)
	Digital input/output subdevice.

#define	A4L_SUBD_COUNTER (A4L_SUBD_MASK_SPECIAL\|0x40)
	Counter subdevice.

#define	A4L_SUBD_TIMER (A4L_SUBD_MASK_SPECIAL\|0x80)
	Timer subdevice.

#define	A4L_SUBD_MEMORY (A4L_SUBD_MASK_SPECIAL\|0x100)
	Memory, EEPROM, DPRAM.

#define	A4L_SUBD_CALIB (A4L_SUBD_MASK_SPECIAL\|0x200)
	Calibration subdevice DACs.

#define	A4L_SUBD_PROC (A4L_SUBD_MASK_SPECIAL\|0x400)
	Processor, DSP.

#define	A4L_SUBD_SERIAL (A4L_SUBD_MASK_SPECIAL\|0x800)
	Serial IO subdevice.

#define	A4L_SUBD_TYPES
	Mask which gathers all the types.

Subdevice features
Flags to define the subdevice's capabilities
#define	A4L_SUBD_CMD 0x1000
	The subdevice can handle command (i.e it can perform asynchronous acquisition)

#define	A4L_SUBD_MMAP 0x8000
	The subdevice support mmap operations (technically, any driver can do it; however, the developer might want that his driver must be accessed through read / write.

Subdevice status
Flags to define the subdevice's status
#define	A4L_SUBD_BUSY_NR 0
	The subdevice is busy, a synchronous or an asynchronous acquisition is occuring.

#define	A4L_SUBD_BUSY (1 << A4L_SUBD_BUSY_NR)
	The subdevice is busy, a synchronous or an asynchronous acquisition is occuring.

#define	A4L_SUBD_CLEAN_NR 1
	The subdevice is about to be cleaned in the middle of the detach procedure.

#define	A4L_SUBD_CLEAN (1 << A4L_SUBD_CLEAN_NR)
	The subdevice is busy, a synchronous or an asynchronous acquisition is occuring.

Detailed Description

Analogy for Linux, subdevice 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