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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 | ||
54 | static int scpi_visa_open(void *priv) | |
55 | { | |
56 | struct scpi_visa *vscpi = priv; | |
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 | ||
102f1239 BV |
71 | static int scpi_visa_source_add(struct sr_session *session, void *priv, |
72 | int events, int timeout, sr_receive_data_callback cb, void *cb_data) | |
1fb2312f ML |
73 | { |
74 | (void) priv; | |
75 | ||
76 | /* Hook up a dummy handler to receive data from the device. */ | |
102f1239 | 77 | return sr_session_source_add(session, -1, events, timeout, cb, cb_data); |
1fb2312f ML |
78 | } |
79 | ||
102f1239 | 80 | static int scpi_visa_source_remove(struct sr_session *session, void *priv) |
1fb2312f ML |
81 | { |
82 | (void) priv; | |
83 | ||
102f1239 | 84 | return sr_session_source_remove(session, -1); |
1fb2312f ML |
85 | } |
86 | ||
87 | static int scpi_visa_send(void *priv, const char *command) | |
88 | { | |
89 | struct scpi_visa *vscpi = priv; | |
90 | gchar *terminated_command; | |
dc05dd60 | 91 | ViUInt32 written = 0; |
1fb2312f ML |
92 | int len; |
93 | ||
94 | terminated_command = g_strconcat(command, "\n", NULL); | |
95 | len = strlen(terminated_command); | |
96 | if (viWrite(vscpi->vi, (ViBuf) (terminated_command + written), len, | |
97 | &written) != VI_SUCCESS) { | |
98 | sr_err("Error while sending SCPI command: '%s'.", command); | |
99 | g_free(terminated_command); | |
100 | return SR_ERR; | |
101 | } | |
102 | ||
103 | g_free(terminated_command); | |
104 | ||
105 | sr_spew("Successfully sent SCPI command: '%s'.", command); | |
106 | ||
107 | return SR_OK; | |
108 | } | |
109 | ||
110 | static int scpi_visa_read_begin(void *priv) | |
111 | { | |
112 | (void) priv; | |
113 | ||
114 | return SR_OK; | |
115 | } | |
116 | ||
117 | static int scpi_visa_read_data(void *priv, char *buf, int maxlen) | |
118 | { | |
119 | struct scpi_visa *vscpi = priv; | |
120 | ViUInt32 count; | |
121 | ||
7ad4e2b8 UH |
122 | if (viRead(vscpi->vi, (ViBuf) buf, maxlen, &count) != VI_SUCCESS) { |
123 | sr_err("Read failed."); | |
1fb2312f ML |
124 | return SR_ERR; |
125 | } | |
126 | ||
127 | return count; | |
128 | } | |
129 | ||
130 | static int scpi_visa_read_complete(void *priv) | |
131 | { | |
132 | struct scpi_visa *vscpi = priv; | |
133 | ViUInt16 status; | |
134 | ||
135 | if (viReadSTB(vscpi->vi, &status) != VI_SUCCESS) { | |
7ad4e2b8 | 136 | sr_err("Failed to read status."); |
1fb2312f ML |
137 | return SR_ERR; |
138 | } | |
139 | ||
140 | return !(status & 16); | |
141 | } | |
142 | ||
143 | static int scpi_visa_close(void *priv) | |
144 | { | |
145 | struct scpi_visa *vscpi = priv; | |
146 | ||
147 | viClose(vscpi->vi); | |
148 | viClose(vscpi->rmgr); | |
149 | ||
150 | return SR_OK; | |
151 | } | |
152 | ||
153 | static void scpi_visa_free(void *priv) | |
154 | { | |
155 | struct scpi_visa *vscpi = priv; | |
156 | ||
157 | g_free(vscpi->resource); | |
158 | g_free(vscpi); | |
159 | } | |
160 | ||
161 | SR_PRIV const struct sr_scpi_dev_inst scpi_visa_dev = { | |
162 | .name = "VISA", | |
163 | .prefix = "visa", | |
164 | .priv_size = sizeof(struct scpi_visa), | |
165 | .dev_inst_new = scpi_visa_dev_inst_new, | |
166 | .open = scpi_visa_open, | |
167 | .source_add = scpi_visa_source_add, | |
168 | .source_remove = scpi_visa_source_remove, | |
169 | .send = scpi_visa_send, | |
170 | .read_begin = scpi_visa_read_begin, | |
171 | .read_data = scpi_visa_read_data, | |
172 | .read_complete = scpi_visa_read_complete, | |
173 | .close = scpi_visa_close, | |
174 | .free = scpi_visa_free, | |
175 | }; |