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1fb2312f ML |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 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> |
1fb2312f ML |
21 | #include <visa.h> |
22 | #include <string.h> | |
c1aae900 | 23 | #include <libsigrok/libsigrok.h> |
515ab088 | 24 | #include "libsigrok-internal.h" |
5a1afc09 | 25 | #include "scpi.h" |
1fb2312f ML |
26 | |
27 | #define LOG_PREFIX "scpi_visa" | |
28 | ||
29 | struct scpi_visa { | |
30 | char *resource; | |
31 | ViSession rmgr; | |
32 | ViSession vi; | |
33 | }; | |
34 | ||
d8b6b28b DE |
35 | static int scpi_visa_dev_inst_new(void *priv, struct drv_context *drvc, |
36 | const char *resource, char **params, const char *serialcomm) | |
1fb2312f ML |
37 | { |
38 | struct scpi_visa *vscpi = priv; | |
39 | ||
d8b6b28b | 40 | (void)drvc; |
1fb2312f ML |
41 | (void)resource; |
42 | (void)serialcomm; | |
43 | ||
44 | if (!params || !params[1]) { | |
45 | sr_err("Invalid parameters."); | |
7ad4e2b8 | 46 | return SR_ERR_BUG; |
1fb2312f ML |
47 | } |
48 | ||
49 | vscpi->resource = g_strdup(params[1]); | |
50 | ||
51 | return SR_OK; | |
52 | } | |
53 | ||
04229f7b | 54 | static int scpi_visa_open(struct sr_scpi_dev_inst *scpi) |
1fb2312f | 55 | { |
04229f7b | 56 | struct scpi_visa *vscpi = scpi->priv; |
1fb2312f ML |
57 | |
58 | if (viOpenDefaultRM(&vscpi->rmgr) != VI_SUCCESS) { | |
59 | sr_err("Cannot open default resource manager."); | |
60 | return SR_ERR; | |
61 | } | |
62 | ||
7ad4e2b8 | 63 | if (viOpen(vscpi->rmgr, vscpi->resource, VI_NO_LOCK, 0, &vscpi->vi) != VI_SUCCESS) { |
1fb2312f ML |
64 | sr_err("Cannot open resource."); |
65 | return SR_ERR; | |
66 | } | |
67 | ||
68 | return SR_OK; | |
69 | } | |
70 | ||
8107a9a6 FS |
71 | static int scpi_visa_connection_id(struct sr_scpi_dev_inst *scpi, |
72 | char **connection_id) | |
73 | { | |
74 | struct scpi_visa *vscpi = scpi->priv; | |
75 | ||
76 | *connection_id = g_strdup_printf("%s/%s", scpi->prefix, vscpi->resource); | |
77 | ||
78 | return SR_OK; | |
79 | } | |
80 | ||
102f1239 BV |
81 | static int scpi_visa_source_add(struct sr_session *session, void *priv, |
82 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
1fb2312f ML |
83 | { |
84 | (void) priv; | |
85 | ||
86 | /* Hook up a dummy handler to receive data from the device. */ | |
102f1239 | 87 | return sr_session_source_add(session, -1, events, timeout, cb, cb_data); |
1fb2312f ML |
88 | } |
89 | ||
102f1239 | 90 | static int scpi_visa_source_remove(struct sr_session *session, void *priv) |
1fb2312f ML |
91 | { |
92 | (void) priv; | |
93 | ||
102f1239 | 94 | return sr_session_source_remove(session, -1); |
1fb2312f ML |
95 | } |
96 | ||
97 | static int scpi_visa_send(void *priv, const char *command) | |
98 | { | |
99 | struct scpi_visa *vscpi = priv; | |
dc05dd60 | 100 | ViUInt32 written = 0; |
1fb2312f ML |
101 | int len; |
102 | ||
055804e8 SB |
103 | len = strlen(command); |
104 | if (viWrite(vscpi->vi, (ViBuf) (command + written), len, | |
1fb2312f ML |
105 | &written) != VI_SUCCESS) { |
106 | sr_err("Error while sending SCPI command: '%s'.", command); | |
1fb2312f ML |
107 | return SR_ERR; |
108 | } | |
109 | ||
1fb2312f ML |
110 | sr_spew("Successfully sent SCPI command: '%s'.", command); |
111 | ||
112 | return SR_OK; | |
113 | } | |
114 | ||
115 | static int scpi_visa_read_begin(void *priv) | |
116 | { | |
117 | (void) priv; | |
118 | ||
119 | return SR_OK; | |
120 | } | |
121 | ||
122 | static int scpi_visa_read_data(void *priv, char *buf, int maxlen) | |
123 | { | |
124 | struct scpi_visa *vscpi = priv; | |
125 | ViUInt32 count; | |
126 | ||
7ad4e2b8 UH |
127 | if (viRead(vscpi->vi, (ViBuf) buf, maxlen, &count) != VI_SUCCESS) { |
128 | sr_err("Read failed."); | |
1fb2312f ML |
129 | return SR_ERR; |
130 | } | |
131 | ||
132 | return count; | |
133 | } | |
134 | ||
135 | static int scpi_visa_read_complete(void *priv) | |
136 | { | |
137 | struct scpi_visa *vscpi = priv; | |
138 | ViUInt16 status; | |
139 | ||
140 | if (viReadSTB(vscpi->vi, &status) != VI_SUCCESS) { | |
7ad4e2b8 | 141 | sr_err("Failed to read status."); |
1fb2312f ML |
142 | return SR_ERR; |
143 | } | |
144 | ||
145 | return !(status & 16); | |
146 | } | |
147 | ||
04229f7b | 148 | static int scpi_visa_close(struct sr_scpi_dev_inst *scpi) |
1fb2312f | 149 | { |
04229f7b | 150 | struct scpi_visa *vscpi = scpi->priv; |
1fb2312f ML |
151 | |
152 | viClose(vscpi->vi); | |
153 | viClose(vscpi->rmgr); | |
154 | ||
155 | return SR_OK; | |
156 | } | |
157 | ||
158 | static void scpi_visa_free(void *priv) | |
159 | { | |
160 | struct scpi_visa *vscpi = priv; | |
161 | ||
162 | g_free(vscpi->resource); | |
163 | g_free(vscpi); | |
164 | } | |
165 | ||
166 | SR_PRIV const struct sr_scpi_dev_inst scpi_visa_dev = { | |
8107a9a6 FS |
167 | .name = "VISA", |
168 | .prefix = "visa", | |
87aa1e63 | 169 | .transport = SCPI_TRANSPORT_VISA, |
8107a9a6 FS |
170 | .priv_size = sizeof(struct scpi_visa), |
171 | .dev_inst_new = scpi_visa_dev_inst_new, | |
172 | .open = scpi_visa_open, | |
173 | .connection_id = scpi_visa_connection_id, | |
174 | .source_add = scpi_visa_source_add, | |
1fb2312f | 175 | .source_remove = scpi_visa_source_remove, |
8107a9a6 FS |
176 | .send = scpi_visa_send, |
177 | .read_begin = scpi_visa_read_begin, | |
178 | .read_data = scpi_visa_read_data, | |
1fb2312f | 179 | .read_complete = scpi_visa_read_complete, |
8107a9a6 FS |
180 | .close = scpi_visa_close, |
181 | .free = scpi_visa_free, | |
1fb2312f | 182 | }; |