// SPDX-License-Identifier: GPL-2.0+ /* * adv_pci1724.c * Comedi driver for the Advantech PCI-1724U card. * * Author: Frank Mori Hess <fmh6jj@gmail.com> * Copyright (C) 2013 GnuBIO Inc * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 1997-8 David A. Schleef <ds@schleef.org>
*/
/* * Driver: adv_pci1724 * Description: Advantech PCI-1724U * Devices: [Advantech] PCI-1724U (adv_pci1724) * Author: Frank Mori Hess <fmh6jj@gmail.com> * Updated: 2013-02-09 * Status: works * * Configuration Options: not applicable, uses comedi PCI auto config * * Subdevice 0 is the analog output. * Subdevice 1 is the offset calibration for the analog output. * Subdevice 2 is the gain calibration for the analog output. * * The calibration offset and gains have quite a large effect on the * analog output, so it is possible to adjust the analog output to * have an output range significantly different from the board's * nominal output ranges. For a calibrated +/-10V range, the analog * output's offset will be set somewhere near mid-range (0x2000) and * its gain will be near maximum (0x3fff). * * There is really no difference between the board's documented 0-20mA * versus 4-20mA output ranges. To pick one or the other is simply a * matter of adjusting the offset and gain calibration until the board * outputs in the desired range.
*/
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