Commit | Line | Data |
---|---|---|
b79a7a20 DS |
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 | ||
0b3fb27f | 29 | int comedi_dio_config(void *dev, unsigned int subdev, unsigned int chan, |
b79a7a20 DS |
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 | ||
0b3fb27f | 44 | int comedi_dio_read(void *dev, unsigned int subdev, unsigned int chan, |
b79a7a20 DS |
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 | ||
0b3fb27f | 59 | int comedi_dio_write(void *dev, unsigned int subdev, unsigned int chan, |
b79a7a20 DS |
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 | ||
0b3fb27f | 74 | int comedi_dio_bitfield(void *dev, unsigned int subdev, unsigned int mask, |
b79a7a20 DS |
75 | unsigned int *bits) |
76 | { | |
77 | comedi_insn insn; | |
790c5541 | 78 | unsigned int data[2]; |
b79a7a20 DS |
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 | } |