1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
lib/data.c
functions for reading/writing data
COMEDILIB - Linux Control and Measurement Device Interface Library
Copyright (C) 1997-2001 David A. Schleef <ds@schleef.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation, version 2.1
of the License.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
*/
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <comedi.h>
#include <string.h>
#include <libinternal.h>
int comedi_data_write(comedi_t *it,unsigned int subdev,unsigned int chan,unsigned int range,
unsigned int aref,lsampl_t data)
{
subdevice *s;
if(!valid_chan(it,subdev,chan))
return -1;
s=it->subdevices+subdev;
if(it->has_insnlist_ioctl){
comedi_insn insn;
memset(&insn,0,sizeof(insn));
insn.insn = INSN_WRITE;
insn.n = 1;
insn.data = &data;
insn.subdev = subdev;
insn.chanspec = CR_PACK(chan,range,aref);
return comedi_do_insn(it,&insn);
}else{
comedi_trig cmd={
mode: 0,
flags: TRIG_WRITE,
n_chan: 1,
n: 1,
trigsrc: 0,
trigvar: 0,
trigvar1: 0,
};
sampl_t sdata=data;
chan=CR_PACK(chan,range,aref);
cmd.subdev=subdev;
if(it->subdevices[subdev].subd_flags & SDF_LSAMPL){
cmd.data=(sampl_t *)(&data);
}else{
cmd.data=&sdata;
}
cmd.chanlist=&chan;
return ioctl_trigger(it->fd,&cmd);
}
}
int comedi_data_read_n(comedi_t *it,unsigned int subdev,unsigned int chan,
unsigned int range, unsigned int aref,lsampl_t *data,
unsigned int n)
{
subdevice *s;
comedi_insn insn;
if(!valid_chan(it,subdev,chan))
return -1;
s=it->subdevices+subdev;
if(it->has_insnlist_ioctl){
memset(&insn,0,sizeof(insn));
insn.insn = INSN_READ;
insn.n = 1;
insn.data = data;
insn.subdev = subdev;
insn.chanspec = CR_PACK(chan,range,aref);
return comedi_do_insn(it,&insn);
}else{
/* There's no need to be fast for a case that is
* obsolete. */
return comedi_data_read(it,subdev,chan,range,aref,data);
}
}
int comedi_data_read(comedi_t *it,unsigned int subdev,unsigned int chan,unsigned int range,
unsigned int aref,lsampl_t *data)
{
subdevice *s;
if(!valid_chan(it,subdev,chan))
return -1;
s=it->subdevices+subdev;
if(it->has_insnlist_ioctl){
comedi_insn insn;
memset(&insn,0,sizeof(insn));
insn.insn = INSN_READ;
insn.n = 1;
insn.data = data;
insn.subdev = subdev;
insn.chanspec = CR_PACK(chan,range,aref);
return comedi_do_insn(it,&insn);
}else{
comedi_trig cmd={
mode: 0,
flags: 0,
n_chan: 1,
n: 1,
trigsrc: 0,
trigvar: 0,
trigvar1: 0,
};
int ret;
sampl_t sdata;
chan=CR_PACK(chan,range,aref);
cmd.subdev=subdev;
cmd.chanlist=&chan;
if(s->subd_flags & SDF_LSAMPL){
cmd.data=(sampl_t *)data;
}else{
cmd.data=&sdata;
}
ret=ioctl_trigger(it->fd,&cmd);
if(ret<0)
return ret;
if(!(s->subd_flags & SDF_LSAMPL)){
*data=sdata;
}
return 0;
}
}
|
