2 comedi/drivers/adq12b.c
3 driver for MicroAxial ADQ12-B data acquisition and control card
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: driver for MicroAxial ADQ12-B data acquisition and control card
26 Devices: [MicroAxial] ADQ12-B (adq12b)
27 Author: jeremy theler <thelerg@ib.cnea.gov.ar>
28 Updated: Thu, 21 Feb 2008 02:56:27 -0300
31 Driver for the acquisition card ADQ12-B (without any add-on).
33 - Analog input is subdevice 0 (16 channels single-ended or 8 differential)
34 - Digital input is subdevice 1 (5 channels)
35 - Digital output is subdevice 1 (8 channels)
36 - The PACER is not supported in this version
38 If you do not specify any options, they will default to
40 # comedi_config /dev/comedi0 adq12b 0x300,0,0
42 option 1: I/O base address. The following table is provided as a help
43 of the hardware jumpers.
46 0x300 1 (factory default)
53 option 2: unipolar/bipolar ADC selection: 0 -> bipolar, 1 -> unipolar
55 selection comedi_config option JUB
56 bipolar 0 2-3 (factory default)
59 option 3: single-ended/differential AI selection: 0 -> SE, 1 -> differential
61 selection comedi_config option JCHA JCHB
62 single-ended 0 1-2 1-2 (factory default)
63 differential 1 2-3 2-3
66 written by jeremy theler <thelerg@ib.cnea.gov.ar>
69 comision nacional de energia atomica
70 universidad nacional de cuyo
74 + changed supported devices string (missused the [] and ())
82 #include "../comedidev.h"
84 // address scheme (page 2.17 of the manual)
85 #define ADQ12B_SIZE 16
87 #define ADQ12B_CTREG 0x00
88 #define ADQ12B_STINR 0x00
89 #define ADQ12B_OUTBR 0x04
90 #define ADQ12B_ADLOW 0x08
91 #define ADQ12B_ADHIG 0x09
92 #define ADQ12B_CONT0 0x0c
93 #define ADQ12B_CONT1 0x0d
94 #define ADQ12B_CONT2 0x0e
95 #define ADQ12B_COWORD 0x0f
97 // mask of the bit at STINR to check end of conversion
98 #define ADQ12B_EOC 0x20
102 // available ranges through the PGA gains
103 static const comedi_lrange range_adq12b_ai_bipolar = { 4, {
110 static const comedi_lrange range_adq12b_ai_unipolar = { 4, {
119 typedef struct adq12b_board_struct{
128 static const adq12b_board adq12b_boards[] = {
137 // potentially, more adq-based deviced will be added
140 ai_chans: 16, // this is just for reference, hardcoded again later
147 #define thisboard ((const adq12b_board *)dev->board_ptr)
150 int unipolar; /* option 2 of comedi_config (1 is iobase) */
151 int differential; /* option 3 of comedi_config */
154 unsigned int digital_state;
157 #define devpriv ((adq12b_private *)dev->private)
160 * The comedi_driver structure tells the Comedi core module
161 * which functions to call to configure/deconfigure (attach/detach)
162 * the board, and also about the kernel module that contains
165 static int adq12b_attach(comedi_device *dev,comedi_devconfig *it);
166 static int adq12b_detach(comedi_device *dev);
167 static comedi_driver driver_adq12b={
168 driver_name: "adq12b",
170 attach: adq12b_attach,
171 detach: adq12b_detach,
172 board_name: &adq12b_boards[0].name,
173 offset: sizeof(adq12b_board),
174 num_names: sizeof(adq12b_boards) / sizeof(adq12b_board),
177 static int adq12b_ai_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,unsigned int *data);
178 static int adq12b_di_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,unsigned int *data);
179 static int adq12b_do_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,unsigned int *data);
182 * Attach is called by the Comedi core to configure the driver
183 * for a particular board. If you specified a board_name array
184 * in the driver structure, dev->board_ptr contains that
187 static int adq12b_attach(comedi_device *dev,comedi_devconfig *it)
190 unsigned long iobase;
191 int unipolar, differential;
193 iobase = it->options[0];
194 unipolar = it->options[1];
195 differential = it->options[2];
197 printk("comedi%d: adq12b called with options base=0x%03lx, %s and %s\n",dev->minor, iobase, (unipolar==1)?"unipolar":"bipolar", (differential==1)?"differential":"single-ended");
199 /* if no address was specified, try the default 0x300 */
201 printk("comedi%d: adq12b warning: I/O base address not specified. Trying the default 0x300.\n", dev->minor);
205 printk("comedi%d: adq12b: 0x%04lx ", dev->minor, iobase);
206 if (!request_region(iobase, ADQ12B_SIZE, "adq12b")) {
207 printk("I/O port conflict\n");
210 dev->iobase = iobase;
213 * Initialize dev->board_name. Note that we can use the "thisboard"
214 * macro now, since we just initialized it in the last line.
216 dev->board_name = thisboard->name;
219 * Allocate the private structure area. alloc_private() is a
220 * convenient macro defined in comedidev.h.
222 if(alloc_private(dev, sizeof(adq12b_private)) < 0)
225 /* fill in devpriv structure */
226 devpriv->unipolar = unipolar;
227 devpriv->differential = differential;
228 devpriv->digital_state = 0;
229 /* initialize channel and range to -1 so we make sure we always write
230 at least once to the CTREG in the instruction */
231 devpriv->last_channel = -1;
232 devpriv->last_range = -1;
236 * Allocate the subdevice structures. alloc_subdevice() is a
237 * convenient macro defined in comedidev.h.
239 if(alloc_subdevices(dev, 3)<0)
242 s = dev->subdevices+0;
243 /* analog input subdevice */
244 s->type = COMEDI_SUBD_AI;
246 s->subdev_flags = SDF_READABLE|SDF_GROUND|SDF_DIFF;
247 s->n_chan = thisboard->ai_diff_chans;
249 s->subdev_flags = SDF_READABLE|SDF_GROUND;
250 s->n_chan = thisboard->ai_se_chans;
254 s->range_table = &range_adq12b_ai_unipolar;
256 s->range_table = &range_adq12b_ai_bipolar;
259 s->maxdata = (1 << thisboard->ai_bits)-1;
262 s->len_chanlist = 4; /* This is the maximum chanlist length that
263 the board can handle */
264 s->insn_read = adq12b_ai_rinsn;
267 s = dev->subdevices+1;
268 /* digital input subdevice */
269 s->type = COMEDI_SUBD_DI;
270 s->subdev_flags = SDF_READABLE;
271 s->n_chan=thisboard->di_chans;
273 s->range_table = &range_digital;
274 s->insn_bits = adq12b_di_insn_bits;
276 s = dev->subdevices+2;
277 /* digital output subdevice */
278 s->type = COMEDI_SUBD_DO;
279 s->subdev_flags = SDF_WRITABLE;
280 s->n_chan = thisboard->do_chans;
282 s->range_table = &range_digital;
283 s->insn_bits = adq12b_do_insn_bits;
286 printk("attached\n");
293 * _detach is called to deconfigure a device. It should deallocate
295 * This function is also called when _attach() fails, so it should be
296 * careful not to release resources that were not necessarily
297 * allocated by _attach(). dev->private and dev->subdevices are
298 * deallocated automatically by the core.
300 static int adq12b_detach(comedi_device *dev)
303 release_region(dev->iobase, ADQ12B_SIZE);
307 printk("comedi%d: adq12b: removed\n",dev->minor);
313 * "instructions" read/write data in "one-shot" or "software-triggered"
317 static int adq12b_ai_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,unsigned int *data)
321 unsigned char hi, lo, status;
323 /* change channel and range only if it is different from the previous */
324 range = CR_RANGE(insn->chanspec);
325 channel = CR_CHAN(insn->chanspec);
326 if (channel != devpriv->last_channel || range != devpriv->last_range) {
327 outb((range << 4) | channel, dev->iobase + ADQ12B_CTREG);
328 comedi_udelay(50); /* wait for the mux to settle */
331 /* trigger conversion */
332 status = inb(dev->iobase + ADQ12B_ADLOW);
334 /* convert n samples */
335 for(n=0; n < insn->n; n++){
337 /* wait for end of convertion */
341 status = inb(dev->iobase + ADQ12B_STINR);
342 status = status & ADQ12B_EOC;
343 } while (status == 0 && ++i < TIMEOUT);
344 // } while (++i < 10);
347 hi = inb(dev->iobase + ADQ12B_ADHIG);
348 lo = inb(dev->iobase + ADQ12B_ADLOW);
350 //rt_printk("debug: chan=%d range=%d status=%d hi=%d lo=%d\n", channel, range, status, hi, lo);
351 data[n] = (hi << 8) | lo;
355 /* return the number of samples read/written */
360 static int adq12b_di_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,unsigned int *data)
363 /* only bits 0-4 have information about digital inputs */
364 data[1] = (inb(dev->iobase+ADQ12B_STINR) & (0x1f));
370 static int adq12b_do_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,unsigned int *data)
374 for (channel = 0; channel < 8; channel++)
375 if (((data[0]>>channel) & 0x01) != 0)
376 outb((((data[1]>>channel)&0x01)<<3) | channel, dev->iobase + ADQ12B_OUTBR);
378 /* store information to retrieve when asked for reading */
380 devpriv->digital_state &= ~data[0];
381 devpriv->digital_state |= (data[0]&data[1]);
384 data[1] = devpriv->digital_state;
391 * A convenient macro that defines init_module() and cleanup_module(),
394 COMEDI_INITCLEANUP(driver_adq12b);