/* comedi/drivers/adq12b.c driver for MicroAxial ADQ12-B data acquisition and control card COMEDI - Linux Control and Measurement Device Interface Copyright (C) 2000 David A. Schleef 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. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Driver: adq12b Description: driver for MicroAxial ADQ12-B data acquisition and control card Devices: [MicroAxial] ADQ12-B (adq12b) Author: jeremy theler Updated: Thu, 21 Feb 2008 02:56:27 -0300 Status: works Driver for the acquisition card ADQ12-B (without any add-on). - Analog input is subdevice 0 (16 channels single-ended or 8 differential) - Digital input is subdevice 1 (5 channels) - Digital output is subdevice 1 (8 channels) - The PACER is not supported in this version If you do not specify any options, they will default to # comedi_config /dev/comedi0 adq12b 0x300,0,0 option 1: I/O base address. The following table is provided as a help of the hardware jumpers. address jumper JADR 0x300 1 (factory default) 0x320 2 0x340 3 0x360 4 0x380 5 0x3A0 6 option 2: unipolar/bipolar ADC selection: 0 -> bipolar, 1 -> unipolar selection comedi_config option JUB bipolar 0 2-3 (factory default) unipolar 1 1-2 option 3: single-ended/differential AI selection: 0 -> SE, 1 -> differential selection comedi_config option JCHA JCHB single-ended 0 1-2 1-2 (factory default) differential 1 2-3 2-3 written by jeremy theler instituto balseiro commission nacional de energia atomica universidad nacional de cuyo argentina 21-feb-2008 + changed supported devices string (missused the [] and ()) 13-oct-2007 + first try */ #include "../comedidev.h" /* address scheme (page 2.17 of the manual) */ #define ADQ12B_SIZE 16 #define ADQ12B_CTREG 0x00 #define ADQ12B_STINR 0x00 #define ADQ12B_OUTBR 0x04 #define ADQ12B_ADLOW 0x08 #define ADQ12B_ADHIG 0x09 #define ADQ12B_CONT0 0x0c #define ADQ12B_CONT1 0x0d #define ADQ12B_CONT2 0x0e #define ADQ12B_COWORD 0x0f /* mask of the bit at STINR to check end of conversion */ #define ADQ12B_EOC 0x20 #define TIMEOUT 20 /* available ranges through the PGA gains */ static const struct comedi_lrange range_adq12b_ai_bipolar = { 4, { BIP_RANGE(5), BIP_RANGE(2), BIP_RANGE(1), BIP_RANGE(0.5) } }; static const struct comedi_lrange range_adq12b_ai_unipolar = { 4, { UNI_RANGE(5), UNI_RANGE(2), UNI_RANGE(1), UNI_RANGE (0.5) } }; struct adq12b_private { int unipolar; /* option 2 of comedi_config (1 is iobase) */ int differential; /* option 3 of comedi_config */ int last_channel; int last_range; unsigned int digital_state; }; /* * "instructions" read/write data in "one-shot" or "software-triggered" * mode. */ static int adq12b_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct adq12b_private *devpriv = dev->private; int n, i; int range, channel; unsigned char hi, lo, status; /* change channel and range only if it is different from the previous */ range = CR_RANGE(insn->chanspec); channel = CR_CHAN(insn->chanspec); if (channel != devpriv->last_channel || range != devpriv->last_range) { outb((range << 4) | channel, dev->iobase + ADQ12B_CTREG); udelay(50); /* wait for the mux to settle */ } /* trigger conversion */ status = inb(dev->iobase + ADQ12B_ADLOW); /* convert n samples */ for (n = 0; n < insn->n; n++) { /* wait for end of conversion */ i = 0; do { /* udelay(1); */ status = inb(dev->iobase + ADQ12B_STINR); status = status & ADQ12B_EOC; } while (status == 0 && ++i < TIMEOUT); /* } while (++i < 10); */ /* read data */ hi = inb(dev->iobase + ADQ12B_ADHIG); lo = inb(dev->iobase + ADQ12B_ADLOW); /* printk("debug: chan=%d range=%d status=%d hi=%d lo=%d\n", channel, range, status, hi, lo); */ data[n] = (hi << 8) | lo; } /* return the number of samples read/written */ return n; } static int adq12b_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { /* only bits 0-4 have information about digital inputs */ data[1] = (inb(dev->iobase + ADQ12B_STINR) & (0x1f)); return insn->n; } static int adq12b_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct adq12b_private *devpriv = dev->private; int channel; for (channel = 0; channel < 8; channel++) if (((data[0] >> channel) & 0x01) != 0) outb((((data[1] >> channel) & 0x01) << 3) | channel, dev->iobase + ADQ12B_OUTBR); /* store information to retrieve when asked for reading */ if (data[0]) { devpriv->digital_state &= ~data[0]; devpriv->digital_state |= (data[0] & data[1]); } data[1] = devpriv->digital_state; return insn->n; } static int adq12b_attach(struct comedi_device *dev, struct comedi_devconfig *it) { struct adq12b_private *devpriv; struct comedi_subdevice *s; int ret; ret = comedi_request_region(dev, it->options[0], ADQ12B_SIZE); if (ret) return ret; devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL); if (!devpriv) return -ENOMEM; dev->private = devpriv; devpriv->unipolar = it->options[1]; devpriv->differential = it->options[2]; devpriv->digital_state = 0; /* * initialize channel and range to -1 so we make sure we * always write at least once to the CTREG in the instruction */ devpriv->last_channel = -1; devpriv->last_range = -1; ret = comedi_alloc_subdevices(dev, 3); if (ret) return ret; s = &dev->subdevices[0]; /* analog input subdevice */ s->type = COMEDI_SUBD_AI; if (devpriv->differential) { s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; s->n_chan = 8; } else { s->subdev_flags = SDF_READABLE | SDF_GROUND; s->n_chan = 16; } if (devpriv->unipolar) s->range_table = &range_adq12b_ai_unipolar; else s->range_table = &range_adq12b_ai_bipolar; s->maxdata = 0xfff; s->len_chanlist = 4; /* This is the maximum chanlist length that the board can handle */ s->insn_read = adq12b_ai_rinsn; s = &dev->subdevices[1]; /* digital input subdevice */ s->type = COMEDI_SUBD_DI; s->subdev_flags = SDF_READABLE; s->n_chan = 5; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = adq12b_di_insn_bits; s = &dev->subdevices[2]; /* digital output subdevice */ s->type = COMEDI_SUBD_DO; s->subdev_flags = SDF_WRITABLE; s->n_chan = 8; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = adq12b_do_insn_bits; return 0; } static struct comedi_driver adq12b_driver = { .driver_name = "adq12b", .module = THIS_MODULE, .attach = adq12b_attach, .detach = comedi_legacy_detach, }; module_comedi_driver(adq12b_driver); MODULE_AUTHOR("Comedi http://www.comedi.org"); MODULE_DESCRIPTION("Comedi low-level driver"); MODULE_LICENSE("GPL");