diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/cb_pcimdda.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/cb_pcimdda.c | 141 |
1 files changed, 71 insertions, 70 deletions
diff --git a/drivers/staging/comedi/drivers/cb_pcimdda.c b/drivers/staging/comedi/drivers/cb_pcimdda.c index 19210d89f2b2..84ef45457c60 100644 --- a/drivers/staging/comedi/drivers/cb_pcimdda.c +++ b/drivers/staging/comedi/drivers/cb_pcimdda.c @@ -1,77 +1,78 @@ /* - comedi/drivers/cb_pcimdda.c - Computer Boards PCIM-DDA06-16 Comedi driver - Author: Calin Culianu <calin@ajvar.org> - - COMEDI - Linux Control and Measurement Device Interface - Copyright (C) 2000 David A. Schleef <ds@schleef.org> - - This program 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. - - This program 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. -*/ + * comedi/drivers/cb_pcimdda.c + * Computer Boards PCIM-DDA06-16 Comedi driver + * Author: Calin Culianu <calin@ajvar.org> + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 2000 David A. Schleef <ds@schleef.org> + * + * This program 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. + * + * This program 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. + */ /* -Driver: cb_pcimdda -Description: Measurement Computing PCIM-DDA06-16 -Devices: [Measurement Computing] PCIM-DDA06-16 (cb_pcimdda) -Author: Calin Culianu <calin@ajvar.org> -Updated: Mon, 14 Apr 2008 15:15:51 +0100 -Status: works - -All features of the PCIM-DDA06-16 board are supported. This board -has 6 16-bit AO channels, and the usual 8255 DIO setup. (24 channels, -configurable in banks of 8 and 4, etc.). This board does not support commands. - -The board has a peculiar way of specifying AO gain/range settings -- You have -1 jumper bank on the card, which either makes all 6 AO channels either -5 Volt unipolar, 5V bipolar, 10 Volt unipolar or 10V bipolar. - -Since there is absolutely _no_ way to tell in software how this jumper is set -(well, at least according to the rather thin spec. from Measurement Computing - that comes with the board), the driver assumes the jumper is at its factory -default setting of +/-5V. - -Also of note is the fact that this board features another jumper, whose -state is also completely invisible to software. It toggles two possible AO -output modes on the board: - - - Update Mode: Writing to an AO channel instantaneously updates the actual - signal output by the DAC on the board (this is the factory default). - - Simultaneous XFER Mode: Writing to an AO channel has no effect until - you read from any one of the AO channels. This is useful for loading - all 6 AO values, and then reading from any one of the AO channels on the - device to instantly update all 6 AO values in unison. Useful for some - control apps, I would assume? If your jumper is in this setting, then you - need to issue your comedi_data_write()s to load all the values you want, - then issue one comedi_data_read() on any channel on the AO subdevice - to initiate the simultaneous XFER. - -Configuration Options: not applicable, uses PCI auto config -*/ + * Driver: cb_pcimdda + * Description: Measurement Computing PCIM-DDA06-16 + * Devices: [Measurement Computing] PCIM-DDA06-16 (cb_pcimdda) + * Author: Calin Culianu <calin@ajvar.org> + * Updated: Mon, 14 Apr 2008 15:15:51 +0100 + * Status: works + * + * All features of the PCIM-DDA06-16 board are supported. + * This board has 6 16-bit AO channels, and the usual 8255 DIO setup. + * (24 channels, configurable in banks of 8 and 4, etc.). + * This board does not support commands. + * + * The board has a peculiar way of specifying AO gain/range settings -- You have + * 1 jumper bank on the card, which either makes all 6 AO channels either + * 5 Volt unipolar, 5V bipolar, 10 Volt unipolar or 10V bipolar. + * + * Since there is absolutely _no_ way to tell in software how this jumper is set + * (well, at least according to the rather thin spec. from Measurement Computing + * that comes with the board), the driver assumes the jumper is at its factory + * default setting of +/-5V. + * + * Also of note is the fact that this board features another jumper, whose + * state is also completely invisible to software. It toggles two possible AO + * output modes on the board: + * + * - Update Mode: Writing to an AO channel instantaneously updates the actual + * signal output by the DAC on the board (this is the factory default). + * - Simultaneous XFER Mode: Writing to an AO channel has no effect until + * you read from any one of the AO channels. This is useful for loading + * all 6 AO values, and then reading from any one of the AO channels on the + * device to instantly update all 6 AO values in unison. Useful for some + * control apps, I would assume? If your jumper is in this setting, then you + * need to issue your comedi_data_write()s to load all the values you want, + * then issue one comedi_data_read() on any channel on the AO subdevice + * to initiate the simultaneous XFER. + * + * Configuration Options: not applicable, uses PCI auto config + */ /* - This is a driver for the Computer Boards PCIM-DDA06-16 Analog Output - card. This board has a unique register layout and as such probably - deserves its own driver file. - - It is theoretically possible to integrate this board into the cb_pcidda - file, but since that isn't my code, I didn't want to significantly - modify that file to support this board (I thought it impolite to do so). - - At any rate, if you feel ambitious, please feel free to take - the code out of this file and combine it with a more unified driver - file. - - I would like to thank Timothy Curry <Timothy.Curry@rdec.redstone.army.mil> - for lending me a board so that I could write this driver. - - -Calin Culianu <calin@ajvar.org> + * This is a driver for the Computer Boards PCIM-DDA06-16 Analog Output + * card. This board has a unique register layout and as such probably + * deserves its own driver file. + * + * It is theoretically possible to integrate this board into the cb_pcidda + * file, but since that isn't my code, I didn't want to significantly + * modify that file to support this board (I thought it impolite to do so). + * + * At any rate, if you feel ambitious, please feel free to take + * the code out of this file and combine it with a more unified driver + * file. + * + * I would like to thank Timothy Curry <Timothy.Curry@rdec.redstone.army.mil> + * for lending me a board so that I could write this driver. + * + * -Calin Culianu <calin@ajvar.org> */ #include <linux/module.h> |