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bb2a4ed4 ML |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Martin Ling <martin-sigrok@earth.li> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "libsigrok.h" | |
21 | #include "libsigrok-internal.h" | |
22 | ||
23 | #include <gpib/ib.h> | |
24 | #include <string.h> | |
25 | ||
26 | #define LOG_PREFIX "scpi_gpib" | |
27 | ||
28 | struct scpi_gpib { | |
29 | char *name; | |
30 | int descriptor; | |
31 | int read_started; | |
32 | }; | |
33 | ||
34 | static int scpi_gpib_dev_inst_new(void *priv, struct drv_context *drvc, | |
35 | const char *resource, char **params, const char *serialcomm) | |
36 | { | |
37 | struct scpi_gpib *gscpi = priv; | |
38 | ||
39 | (void)drvc; | |
40 | (void)resource; | |
41 | (void)serialcomm; | |
42 | ||
43 | if (!params || !params[1]) | |
44 | return SR_ERR; | |
45 | ||
46 | gscpi->name = g_strdup(params[1]); | |
47 | ||
48 | return SR_OK; | |
49 | } | |
50 | ||
51 | static int scpi_gpib_open(void *priv) | |
52 | { | |
53 | struct scpi_gpib *gscpi = priv; | |
54 | ||
55 | if ((gscpi->descriptor = ibfind(gscpi->name)) < 0) | |
56 | return SR_ERR; | |
57 | ||
58 | return SR_OK; | |
59 | } | |
60 | ||
61 | static int scpi_gpib_source_add(struct sr_session *session, void *priv, | |
62 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
63 | { | |
64 | (void) priv; | |
65 | ||
66 | /* Hook up a dummy handler to receive data from the device. */ | |
67 | return sr_session_source_add(session, -1, events, timeout, cb, cb_data); | |
68 | } | |
69 | ||
70 | static int scpi_gpib_source_remove(struct sr_session *session, void *priv) | |
71 | { | |
72 | (void) priv; | |
73 | ||
74 | return sr_session_source_remove(session, -1); | |
75 | } | |
76 | ||
77 | static int scpi_gpib_send(void *priv, const char *command) | |
78 | { | |
79 | struct scpi_gpib *gscpi = priv; | |
80 | int len = strlen(command); | |
81 | ||
82 | ibwrt(gscpi->descriptor, command, len); | |
83 | ||
84 | if (ibsta & ERR) | |
85 | { | |
86 | sr_err("Error while sending SCPI command: '%s': iberr = %d.", | |
87 | command, iberr); | |
88 | return SR_ERR; | |
89 | } | |
90 | ||
91 | if (ibcnt < len) | |
92 | { | |
93 | sr_err("Failed to send all of SCPI command: '%s': " | |
94 | "len = %d, ibcnt = .", command, len, ibcnt); | |
95 | return SR_ERR; | |
96 | } | |
97 | ||
98 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
99 | ||
100 | return SR_OK; | |
101 | } | |
102 | ||
103 | static int scpi_gpib_read_begin(void *priv) | |
104 | { | |
105 | struct scpi_gpib *gscpi = priv; | |
106 | ||
107 | gscpi->read_started = 0; | |
108 | ||
109 | return SR_OK; | |
110 | } | |
111 | ||
112 | static int scpi_gpib_read_data(void *priv, char *buf, int maxlen) | |
113 | { | |
114 | struct scpi_gpib *gscpi = priv; | |
115 | ||
116 | ibrd(gscpi->descriptor, buf, maxlen); | |
117 | ||
118 | if (ibsta & ERR) | |
119 | { | |
120 | sr_err("Error while reading SCPI response: iberr = %d.", iberr); | |
121 | return SR_ERR; | |
122 | } | |
123 | ||
124 | gscpi->read_started = 1; | |
125 | ||
126 | return ibcnt; | |
127 | } | |
128 | ||
129 | static int scpi_gpib_read_complete(void *priv) | |
130 | { | |
131 | struct scpi_gpib *gscpi = priv; | |
132 | ||
133 | return gscpi->read_started && (ibsta & END); | |
134 | } | |
135 | ||
136 | static int scpi_gpib_close(void *priv) | |
137 | { | |
138 | struct scpi_gpib *gscpi = priv; | |
139 | ||
140 | ibonl(gscpi->descriptor, 0); | |
141 | ||
142 | return SR_OK; | |
143 | } | |
144 | ||
145 | static void scpi_gpib_free(void *priv) | |
146 | { | |
147 | struct scpi_gpib *gscpi = priv; | |
148 | ||
149 | g_free(gscpi->name); | |
150 | } | |
151 | ||
7343ad1e | 152 | SR_PRIV const struct sr_scpi_dev_inst scpi_libgpib_dev = { |
bb2a4ed4 | 153 | .name = "GPIB", |
7343ad1e | 154 | .prefix = "libgpib", |
bb2a4ed4 ML |
155 | .priv_size = sizeof(struct scpi_gpib), |
156 | .dev_inst_new = scpi_gpib_dev_inst_new, | |
157 | .open = scpi_gpib_open, | |
158 | .source_add = scpi_gpib_source_add, | |
159 | .source_remove = scpi_gpib_source_remove, | |
160 | .send = scpi_gpib_send, | |
161 | .read_begin = scpi_gpib_read_begin, | |
162 | .read_data = scpi_gpib_read_data, | |
163 | .read_complete = scpi_gpib_read_complete, | |
164 | .close = scpi_gpib_close, | |
165 | .free = scpi_gpib_free, | |
166 | }; |