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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 | ||
bb2a4ed4 ML |
20 | #include <gpib/ib.h> |
21 | #include <string.h> | |
515ab088 UH |
22 | #include "libsigrok.h" |
23 | #include "libsigrok-internal.h" | |
bb2a4ed4 ML |
24 | |
25 | #define LOG_PREFIX "scpi_gpib" | |
26 | ||
27 | struct scpi_gpib { | |
28 | char *name; | |
29 | int descriptor; | |
30 | int read_started; | |
31 | }; | |
32 | ||
33 | static int scpi_gpib_dev_inst_new(void *priv, struct drv_context *drvc, | |
34 | const char *resource, char **params, const char *serialcomm) | |
35 | { | |
36 | struct scpi_gpib *gscpi = priv; | |
37 | ||
38 | (void)drvc; | |
39 | (void)resource; | |
40 | (void)serialcomm; | |
41 | ||
42 | if (!params || !params[1]) | |
43 | return SR_ERR; | |
44 | ||
45 | gscpi->name = g_strdup(params[1]); | |
46 | ||
47 | return SR_OK; | |
48 | } | |
49 | ||
50 | static int scpi_gpib_open(void *priv) | |
51 | { | |
52 | struct scpi_gpib *gscpi = priv; | |
53 | ||
54 | if ((gscpi->descriptor = ibfind(gscpi->name)) < 0) | |
55 | return SR_ERR; | |
56 | ||
57 | return SR_OK; | |
58 | } | |
59 | ||
60 | static int scpi_gpib_source_add(struct sr_session *session, void *priv, | |
61 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
62 | { | |
63 | (void) priv; | |
64 | ||
65 | /* Hook up a dummy handler to receive data from the device. */ | |
66 | return sr_session_source_add(session, -1, events, timeout, cb, cb_data); | |
67 | } | |
68 | ||
69 | static int scpi_gpib_source_remove(struct sr_session *session, void *priv) | |
70 | { | |
71 | (void) priv; | |
72 | ||
73 | return sr_session_source_remove(session, -1); | |
74 | } | |
75 | ||
76 | static int scpi_gpib_send(void *priv, const char *command) | |
77 | { | |
78 | struct scpi_gpib *gscpi = priv; | |
79 | int len = strlen(command); | |
80 | ||
81 | ibwrt(gscpi->descriptor, command, len); | |
82 | ||
83 | if (ibsta & ERR) | |
84 | { | |
85 | sr_err("Error while sending SCPI command: '%s': iberr = %d.", | |
86 | command, iberr); | |
87 | return SR_ERR; | |
88 | } | |
89 | ||
90 | if (ibcnt < len) | |
91 | { | |
92 | sr_err("Failed to send all of SCPI command: '%s': " | |
93 | "len = %d, ibcnt = .", command, len, ibcnt); | |
94 | return SR_ERR; | |
95 | } | |
96 | ||
97 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
98 | ||
99 | return SR_OK; | |
100 | } | |
101 | ||
102 | static int scpi_gpib_read_begin(void *priv) | |
103 | { | |
104 | struct scpi_gpib *gscpi = priv; | |
105 | ||
106 | gscpi->read_started = 0; | |
107 | ||
108 | return SR_OK; | |
109 | } | |
110 | ||
111 | static int scpi_gpib_read_data(void *priv, char *buf, int maxlen) | |
112 | { | |
113 | struct scpi_gpib *gscpi = priv; | |
114 | ||
115 | ibrd(gscpi->descriptor, buf, maxlen); | |
116 | ||
117 | if (ibsta & ERR) | |
118 | { | |
119 | sr_err("Error while reading SCPI response: iberr = %d.", iberr); | |
120 | return SR_ERR; | |
121 | } | |
122 | ||
123 | gscpi->read_started = 1; | |
124 | ||
125 | return ibcnt; | |
126 | } | |
127 | ||
128 | static int scpi_gpib_read_complete(void *priv) | |
129 | { | |
130 | struct scpi_gpib *gscpi = priv; | |
131 | ||
132 | return gscpi->read_started && (ibsta & END); | |
133 | } | |
134 | ||
135 | static int scpi_gpib_close(void *priv) | |
136 | { | |
137 | struct scpi_gpib *gscpi = priv; | |
138 | ||
139 | ibonl(gscpi->descriptor, 0); | |
140 | ||
141 | return SR_OK; | |
142 | } | |
143 | ||
144 | static void scpi_gpib_free(void *priv) | |
145 | { | |
146 | struct scpi_gpib *gscpi = priv; | |
147 | ||
148 | g_free(gscpi->name); | |
149 | } | |
150 | ||
7343ad1e | 151 | SR_PRIV const struct sr_scpi_dev_inst scpi_libgpib_dev = { |
bb2a4ed4 | 152 | .name = "GPIB", |
7343ad1e | 153 | .prefix = "libgpib", |
bb2a4ed4 ML |
154 | .priv_size = sizeof(struct scpi_gpib), |
155 | .dev_inst_new = scpi_gpib_dev_inst_new, | |
156 | .open = scpi_gpib_open, | |
157 | .source_add = scpi_gpib_source_add, | |
158 | .source_remove = scpi_gpib_source_remove, | |
159 | .send = scpi_gpib_send, | |
160 | .read_begin = scpi_gpib_read_begin, | |
161 | .read_data = scpi_gpib_read_data, | |
162 | .read_complete = scpi_gpib_read_complete, | |
163 | .close = scpi_gpib_close, | |
164 | .free = scpi_gpib_free, | |
165 | }; |