| David Schleef | b79a7a2 | 2008-11-14 15:58:23 -0800 | [diff] [blame] | 1 | /* |
| 2 | kcomedilib/dio.c |
| 3 | implements comedi_dio_*() functions |
| 4 | |
| 5 | COMEDI - Linux Control and Measurement Device Interface |
| 6 | Copyright (C) 2000 David A. Schleef <ds@schleef.org> |
| 7 | |
| 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. |
| 12 | |
| 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. |
| 17 | |
| 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. |
| 21 | |
| 22 | */ |
| 23 | |
| 24 | #include "../comedi.h" |
| 25 | #include "../comedilib.h" |
| 26 | |
| 27 | #include <linux/string.h> |
| 28 | |
| 29 | int comedi_dio_config(comedi_t * dev, unsigned int subdev, unsigned int chan, |
| 30 | unsigned int io) |
| 31 | { |
| 32 | comedi_insn insn; |
| 33 | |
| 34 | memset(&insn, 0, sizeof(insn)); |
| 35 | insn.insn = INSN_CONFIG; |
| 36 | insn.n = 1; |
| 37 | insn.data = &io; |
| 38 | insn.subdev = subdev; |
| 39 | insn.chanspec = CR_PACK(chan, 0, 0); |
| 40 | |
| 41 | return comedi_do_insn(dev, &insn); |
| 42 | } |
| 43 | |
| 44 | int comedi_dio_read(comedi_t * dev, unsigned int subdev, unsigned int chan, |
| 45 | unsigned int *val) |
| 46 | { |
| 47 | comedi_insn insn; |
| 48 | |
| 49 | memset(&insn, 0, sizeof(insn)); |
| 50 | insn.insn = INSN_READ; |
| 51 | insn.n = 1; |
| 52 | insn.data = val; |
| 53 | insn.subdev = subdev; |
| 54 | insn.chanspec = CR_PACK(chan, 0, 0); |
| 55 | |
| 56 | return comedi_do_insn(dev, &insn); |
| 57 | } |
| 58 | |
| 59 | int comedi_dio_write(comedi_t * dev, unsigned int subdev, unsigned int chan, |
| 60 | unsigned int val) |
| 61 | { |
| 62 | comedi_insn insn; |
| 63 | |
| 64 | memset(&insn, 0, sizeof(insn)); |
| 65 | insn.insn = INSN_WRITE; |
| 66 | insn.n = 1; |
| 67 | insn.data = &val; |
| 68 | insn.subdev = subdev; |
| 69 | insn.chanspec = CR_PACK(chan, 0, 0); |
| 70 | |
| 71 | return comedi_do_insn(dev, &insn); |
| 72 | } |
| 73 | |
| 74 | int comedi_dio_bitfield(comedi_t * dev, unsigned int subdev, unsigned int mask, |
| 75 | unsigned int *bits) |
| 76 | { |
| 77 | comedi_insn insn; |
| 78 | lsampl_t data[2]; |
| 79 | int ret; |
| 80 | |
| 81 | memset(&insn, 0, sizeof(insn)); |
| 82 | insn.insn = INSN_BITS; |
| 83 | insn.n = 2; |
| 84 | insn.data = data; |
| 85 | insn.subdev = subdev; |
| 86 | |
| 87 | data[0] = mask; |
| 88 | data[1] = *bits; |
| 89 | |
| 90 | ret = comedi_do_insn(dev, &insn); |
| 91 | |
| 92 | *bits = data[1]; |
| 93 | |
| 94 | return ret; |
| 95 | } |