comedi_data_write(3) [debian man page]
COMEDI_DATA_WRITE(3) Comedi reference COMEDI_DATA_WRITE(3) NAME
comedi_data_write - write single sample to channel SYNOPSIS
#include <comedilib.h> int comedi_data_write(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int range, unsigned int aref, lsampl_t data); DESCRIPTION
Writes a single sample on the channel that is specified by the Comedi device device, the subdevice subdevice, and the channel channel. If appropriate, the device is configured to use range specification range and analog reference type aref. Analog reference types that are not supported by the device are silently ignored. The function comedi_data_write writes the data value specified by the parameter data to the specified channel. RETURN VALUE
On success, comedi_data_write returns 1 (the number of samples written). If there is an error, -1 is returned. AUTHORS
David Schleef <ds@schleef.org> Author. Frank Mori Hess <fmhess@users.sourceforge.net> Author. Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be> Author. Bernd Porr <tech@linux-usb-daq.co.uk> Author. Ian Abbott <abbotti@mev.co.uk> Author. COPYRIGHT
Copyright (C) 1998-2003 David Schleef Copyright (C) 2001-2003, 2005, 2008 Frank Mori Hess Copyright (C) 2002-2003 Herman Bruyninckx Copyright (C) 2012 Bernd Porr Copyright (C) 2012 Ian Abbott This document is part of Comedilib. In the context of this document, the term "source code" as defined by the license is interpreted as the XML source. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, version 2.1 of the License. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Comedi 07/06/2012 COMEDI_DATA_WRITE(3)
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COMEDI_DIO_WRITE(3) Comedi reference COMEDI_DIO_WRITE(3) NAME
comedi_dio_write - write single bit to digital channel SYNOPSIS
#include <comedilib.h> int comedi_dio_write(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int bit); DESCRIPTION
The function writes the value bit to the channel channel belonging to the subdevice subdevice of device device. This function is equivalent to: comedi_data_write(device, subdevice, channel, 0, 0, bit); This function does not require a digital subdevice or a subdevice with a maximum data value of 1 to work properly. If you wish to write multiple digital channels at once, it is more efficient to use comedi_dio_bitfield2 than to call this function multiple times. RETURN VALUE
Return values and errors are the same as comedi_data_write. AUTHORS
David Schleef <ds@schleef.org> Author. Frank Mori Hess <fmhess@users.sourceforge.net> Author. Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be> Author. Bernd Porr <tech@linux-usb-daq.co.uk> Author. Ian Abbott <abbotti@mev.co.uk> Author. COPYRIGHT
Copyright (C) 1998-2003 David Schleef Copyright (C) 2001-2003, 2005, 2008 Frank Mori Hess Copyright (C) 2002-2003 Herman Bruyninckx Copyright (C) 2012 Bernd Porr Copyright (C) 2012 Ian Abbott This document is part of Comedilib. In the context of this document, the term "source code" as defined by the license is interpreted as the XML source. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, version 2.1 of the License. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Comedi 07/06/2012 COMEDI_DIO_WRITE(3)