2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
5 * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include <libsigrok/libsigrok.h>
26 #include "libsigrok-internal.h"
29 #define LOG_PREFIX "scpi_serial"
31 #define BUFFER_SIZE 1024
34 struct sr_serial_dev_inst *serial;
35 char buffer[BUFFER_SIZE];
43 const char *serialcomm;
44 } scpi_serial_usb_ids[] = {
45 { 0x0403, 0xed72, "115200/8n1/flow=1" }, /* Hameg HO720 */
46 { 0x0403, 0xed73, "115200/8n1/flow=1" }, /* Hameg HO730 */
49 static GSList *scpi_serial_scan(struct drv_context *drvc)
51 GSList *l, *r, *resources = NULL;
57 for (i = 0; i < ARRAY_SIZE(scpi_serial_usb_ids); i++) {
58 if (!(l = sr_serial_find_usb(scpi_serial_usb_ids[i].vendor_id,
59 scpi_serial_usb_ids[i].product_id)))
61 for (r = l; r; r = r->next) {
62 if (scpi_serial_usb_ids[i].serialcomm)
63 res = g_strdup_printf("%s:%s", (char *) r->data,
64 scpi_serial_usb_ids[i].serialcomm);
66 res = g_strdup(r->data);
67 resources = g_slist_append(resources, res);
69 g_slist_free_full(l, g_free);
75 static int scpi_serial_dev_inst_new(void *priv, struct drv_context *drvc,
76 const char *resource, char **params, const char *serialcomm)
78 struct scpi_serial *sscpi = priv;
83 sscpi->serial = sr_serial_dev_inst_new(resource, serialcomm);
88 static int scpi_serial_open(struct sr_scpi_dev_inst *scpi)
90 struct scpi_serial *sscpi = scpi->priv;
91 struct sr_serial_dev_inst *serial = sscpi->serial;
93 if (serial_open(serial, SERIAL_RDWR) != SR_OK)
96 if (serial_flush(serial) != SR_OK)
105 static int scpi_serial_source_add(struct sr_session *session, void *priv,
106 int events, int timeout, sr_receive_data_callback cb, void *cb_data)
108 struct scpi_serial *sscpi = priv;
109 struct sr_serial_dev_inst *serial = sscpi->serial;
111 return serial_source_add(session, serial, events, timeout, cb, cb_data);
114 static int scpi_serial_source_remove(struct sr_session *session, void *priv)
116 struct scpi_serial *sscpi = priv;
117 struct sr_serial_dev_inst *serial = sscpi->serial;
119 return serial_source_remove(session, serial);
122 static int scpi_serial_send(void *priv, const char *command)
124 int len, result, written;
125 gchar *terminated_command;
126 struct scpi_serial *sscpi = priv;
127 struct sr_serial_dev_inst *serial = sscpi->serial;
129 terminated_command = g_strconcat(command, "\n", NULL);
130 len = strlen(terminated_command);
132 while (written < len) {
133 result = serial_write_nonblocking(serial,
134 terminated_command + written, len - written);
136 sr_err("Error while sending SCPI command: '%s'.", command);
137 g_free(terminated_command);
143 g_free(terminated_command);
145 sr_spew("Successfully sent SCPI command: '%s'.", command);
150 static int scpi_serial_read_begin(void *priv)
157 static int scpi_serial_read_data(void *priv, char *buf, int maxlen)
159 struct scpi_serial *sscpi = priv;
162 len = BUFFER_SIZE - sscpi->count;
164 /* Try to read new data into the buffer if there is space. */
166 ret = serial_read_nonblocking(sscpi->serial, sscpi->buffer + sscpi->count,
167 BUFFER_SIZE - sscpi->count);
175 sr_spew("Read %d bytes into buffer.", ret);
178 /* Return as many bytes as possible from buffer, excluding any trailing newline. */
179 if (sscpi->read < sscpi->count) {
180 len = sscpi->count - sscpi->read;
183 if (sscpi->buffer[sscpi->read + len - 1] == '\n')
185 sr_spew("Returning %d bytes from buffer.", len);
186 memcpy(buf, sscpi->buffer + sscpi->read, len);
188 if (sscpi->read == BUFFER_SIZE) {
189 sr_spew("Resetting buffer.");
199 static int scpi_serial_read_complete(void *priv)
201 struct scpi_serial *sscpi = priv;
203 /* If the next character is a newline, discard it and report complete. */
204 if (sscpi->read < sscpi->count && sscpi->buffer[sscpi->read] == '\n') {
212 static int scpi_serial_close(struct sr_scpi_dev_inst *scpi)
214 struct scpi_serial *sscpi = scpi->priv;
216 return serial_close(sscpi->serial);
219 static void scpi_serial_free(void *priv)
221 struct scpi_serial *sscpi = priv;
223 sr_serial_dev_inst_free(sscpi->serial);
226 SR_PRIV const struct sr_scpi_dev_inst scpi_serial_dev = {
229 .priv_size = sizeof(struct scpi_serial),
230 .scan = scpi_serial_scan,
231 .dev_inst_new = scpi_serial_dev_inst_new,
232 .open = scpi_serial_open,
233 .source_add = scpi_serial_source_add,
234 .source_remove = scpi_serial_source_remove,
235 .send = scpi_serial_send,
236 .read_begin = scpi_serial_read_begin,
237 .read_data = scpi_serial_read_data,
238 .read_complete = scpi_serial_read_complete,
239 .close = scpi_serial_close,
240 .free = scpi_serial_free,