2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li>
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.
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.
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/>.
23 #include <libsigrok/libsigrok.h>
24 #include "libsigrok-internal.h"
27 #define LOG_PREFIX "scpi_visa"
35 static int scpi_visa_dev_inst_new(void *priv, struct drv_context *drvc,
36 const char *resource, char **params, const char *serialcomm)
38 struct scpi_visa *vscpi = priv;
44 if (!params || !params[1]) {
45 sr_err("Invalid parameters.");
49 vscpi->resource = g_strdup(params[1]);
54 static int scpi_visa_open(struct sr_scpi_dev_inst *scpi)
56 struct scpi_visa *vscpi = scpi->priv;
58 if (viOpenDefaultRM(&vscpi->rmgr) != VI_SUCCESS) {
59 sr_err("Cannot open default resource manager.");
63 if (viOpen(vscpi->rmgr, vscpi->resource, VI_NO_LOCK, 0, &vscpi->vi) != VI_SUCCESS) {
64 sr_err("Cannot open resource.");
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)
76 /* Hook up a dummy handler to receive data from the device. */
77 return sr_session_source_add(session, -1, events, timeout, cb, cb_data);
80 static int scpi_visa_source_remove(struct sr_session *session, void *priv)
84 return sr_session_source_remove(session, -1);
87 static int scpi_visa_send(void *priv, const char *command)
89 struct scpi_visa *vscpi = priv;
93 len = strlen(command);
94 if (viWrite(vscpi->vi, (ViBuf) (command + written), len,
95 &written) != VI_SUCCESS) {
96 sr_err("Error while sending SCPI command: '%s'.", command);
100 sr_spew("Successfully sent SCPI command: '%s'.", command);
105 static int scpi_visa_read_begin(void *priv)
112 static int scpi_visa_read_data(void *priv, char *buf, int maxlen)
114 struct scpi_visa *vscpi = priv;
117 if (viRead(vscpi->vi, (ViBuf) buf, maxlen, &count) != VI_SUCCESS) {
118 sr_err("Read failed.");
125 static int scpi_visa_read_complete(void *priv)
127 struct scpi_visa *vscpi = priv;
130 if (viReadSTB(vscpi->vi, &status) != VI_SUCCESS) {
131 sr_err("Failed to read status.");
135 return !(status & 16);
138 static int scpi_visa_close(struct sr_scpi_dev_inst *scpi)
140 struct scpi_visa *vscpi = scpi->priv;
143 viClose(vscpi->rmgr);
148 static void scpi_visa_free(void *priv)
150 struct scpi_visa *vscpi = priv;
152 g_free(vscpi->resource);
156 SR_PRIV const struct sr_scpi_dev_inst scpi_visa_dev = {
159 .priv_size = sizeof(struct scpi_visa),
160 .dev_inst_new = scpi_visa_dev_inst_new,
161 .open = scpi_visa_open,
162 .source_add = scpi_visa_source_add,
163 .source_remove = scpi_visa_source_remove,
164 .send = scpi_visa_send,
165 .read_begin = scpi_visa_read_begin,
166 .read_data = scpi_visa_read_data,
167 .read_complete = scpi_visa_read_complete,
168 .close = scpi_visa_close,
169 .free = scpi_visa_free,