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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 | ||
6ec6c43b | 20 | #include <config.h> |
bb2a4ed4 ML |
21 | #include <gpib/ib.h> |
22 | #include <string.h> | |
c1aae900 | 23 | #include <libsigrok/libsigrok.h> |
515ab088 | 24 | #include "libsigrok-internal.h" |
5a1afc09 | 25 | #include "scpi.h" |
bb2a4ed4 ML |
26 | |
27 | #define LOG_PREFIX "scpi_gpib" | |
28 | ||
29 | struct scpi_gpib { | |
30 | char *name; | |
31 | int descriptor; | |
32 | int read_started; | |
33 | }; | |
34 | ||
35 | static int scpi_gpib_dev_inst_new(void *priv, struct drv_context *drvc, | |
36 | const char *resource, char **params, const char *serialcomm) | |
37 | { | |
38 | struct scpi_gpib *gscpi = priv; | |
39 | ||
40 | (void)drvc; | |
41 | (void)resource; | |
42 | (void)serialcomm; | |
43 | ||
44 | if (!params || !params[1]) | |
45 | return SR_ERR; | |
46 | ||
47 | gscpi->name = g_strdup(params[1]); | |
48 | ||
49 | return SR_OK; | |
50 | } | |
51 | ||
04229f7b | 52 | static int scpi_gpib_open(struct sr_scpi_dev_inst *scpi) |
bb2a4ed4 | 53 | { |
04229f7b | 54 | struct scpi_gpib *gscpi = scpi->priv; |
bb2a4ed4 ML |
55 | |
56 | if ((gscpi->descriptor = ibfind(gscpi->name)) < 0) | |
57 | return SR_ERR; | |
58 | ||
59 | return SR_OK; | |
60 | } | |
61 | ||
8107a9a6 FS |
62 | static int scpi_gpib_connection_id(struct sr_scpi_dev_inst *scpi, |
63 | char **connection_id) | |
64 | { | |
65 | struct scpi_gpib *gscpi = scpi->priv; | |
66 | ||
67 | *connection_id = g_strdup_printf("%s/%s", scpi->prefix, gscpi->name); | |
68 | ||
69 | return SR_OK; | |
70 | } | |
71 | ||
bb2a4ed4 ML |
72 | static int scpi_gpib_source_add(struct sr_session *session, void *priv, |
73 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
74 | { | |
75 | (void) priv; | |
76 | ||
77 | /* Hook up a dummy handler to receive data from the device. */ | |
78 | return sr_session_source_add(session, -1, events, timeout, cb, cb_data); | |
79 | } | |
80 | ||
81 | static int scpi_gpib_source_remove(struct sr_session *session, void *priv) | |
82 | { | |
83 | (void) priv; | |
84 | ||
85 | return sr_session_source_remove(session, -1); | |
86 | } | |
87 | ||
88 | static int scpi_gpib_send(void *priv, const char *command) | |
89 | { | |
90 | struct scpi_gpib *gscpi = priv; | |
91 | int len = strlen(command); | |
92 | ||
93 | ibwrt(gscpi->descriptor, command, len); | |
94 | ||
95 | if (ibsta & ERR) | |
96 | { | |
daf13c57 AG |
97 | sr_err("Error while sending SCPI command: '%s': iberr = %s.", |
98 | command, gpib_error_string(iberr)); | |
bb2a4ed4 ML |
99 | return SR_ERR; |
100 | } | |
101 | ||
102 | if (ibcnt < len) | |
103 | { | |
104 | sr_err("Failed to send all of SCPI command: '%s': " | |
27cd728f | 105 | "len = %d, ibcnt = %d.", command, len, ibcnt); |
bb2a4ed4 ML |
106 | return SR_ERR; |
107 | } | |
108 | ||
109 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
110 | ||
111 | return SR_OK; | |
112 | } | |
113 | ||
114 | static int scpi_gpib_read_begin(void *priv) | |
115 | { | |
116 | struct scpi_gpib *gscpi = priv; | |
117 | ||
118 | gscpi->read_started = 0; | |
119 | ||
120 | return SR_OK; | |
121 | } | |
122 | ||
123 | static int scpi_gpib_read_data(void *priv, char *buf, int maxlen) | |
124 | { | |
125 | struct scpi_gpib *gscpi = priv; | |
126 | ||
127 | ibrd(gscpi->descriptor, buf, maxlen); | |
128 | ||
129 | if (ibsta & ERR) | |
130 | { | |
ae328597 FS |
131 | sr_err("Error while reading SCPI response: " |
132 | "iberr = %s, ibsta = %d.", | |
133 | gpib_error_string(iberr), ibsta); | |
bb2a4ed4 ML |
134 | return SR_ERR; |
135 | } | |
136 | ||
137 | gscpi->read_started = 1; | |
138 | ||
139 | return ibcnt; | |
140 | } | |
141 | ||
142 | static int scpi_gpib_read_complete(void *priv) | |
143 | { | |
144 | struct scpi_gpib *gscpi = priv; | |
145 | ||
146 | return gscpi->read_started && (ibsta & END); | |
147 | } | |
148 | ||
04229f7b | 149 | static int scpi_gpib_close(struct sr_scpi_dev_inst *scpi) |
bb2a4ed4 | 150 | { |
04229f7b | 151 | struct scpi_gpib *gscpi = scpi->priv; |
bb2a4ed4 | 152 | |
8b0ad3a5 AG |
153 | /* Put device in back local mode to prevent lock-out of front panel. */ |
154 | ibloc(gscpi->descriptor); | |
155 | /* Now it's safe to close the handle. */ | |
bb2a4ed4 ML |
156 | ibonl(gscpi->descriptor, 0); |
157 | ||
158 | return SR_OK; | |
159 | } | |
160 | ||
161 | static void scpi_gpib_free(void *priv) | |
162 | { | |
163 | struct scpi_gpib *gscpi = priv; | |
164 | ||
165 | g_free(gscpi->name); | |
166 | } | |
167 | ||
02d4db35 FS |
168 | SR_PRIV int sr_scpi_gpib_spoll(struct sr_scpi_dev_inst *scpi, char *buf) |
169 | { | |
170 | struct scpi_gpib *gscpi = scpi->priv; | |
171 | ||
6188675b | 172 | g_mutex_lock(&scpi->scpi_mutex); |
02d4db35 FS |
173 | ibrsp(gscpi->descriptor, buf); |
174 | ||
175 | if (ibsta & ERR) { | |
176 | sr_err("Error while serial polling: iberr = %s.", | |
177 | gpib_error_string(iberr)); | |
6188675b | 178 | g_mutex_unlock(&scpi->scpi_mutex); |
02d4db35 FS |
179 | return SR_ERR; |
180 | } | |
6188675b | 181 | g_mutex_unlock(&scpi->scpi_mutex); |
02d4db35 FS |
182 | sr_spew("Successful serial poll: 0x%x", (uint8_t)buf[0]); |
183 | ||
184 | return SR_OK; | |
185 | } | |
186 | ||
7343ad1e | 187 | SR_PRIV const struct sr_scpi_dev_inst scpi_libgpib_dev = { |
8107a9a6 FS |
188 | .name = "GPIB", |
189 | .prefix = "libgpib", | |
87aa1e63 | 190 | .transport = SCPI_TRANSPORT_LIBGPIB, |
8107a9a6 FS |
191 | .priv_size = sizeof(struct scpi_gpib), |
192 | .dev_inst_new = scpi_gpib_dev_inst_new, | |
193 | .open = scpi_gpib_open, | |
194 | .connection_id = scpi_gpib_connection_id, | |
195 | .source_add = scpi_gpib_source_add, | |
bb2a4ed4 | 196 | .source_remove = scpi_gpib_source_remove, |
8107a9a6 FS |
197 | .send = scpi_gpib_send, |
198 | .read_begin = scpi_gpib_read_begin, | |
199 | .read_data = scpi_gpib_read_data, | |
bb2a4ed4 | 200 | .read_complete = scpi_gpib_read_complete, |
8107a9a6 FS |
201 | .close = scpi_gpib_close, |
202 | .free = scpi_gpib_free, | |
bb2a4ed4 | 203 | }; |