2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
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/>.
20 #include "libsigrok.h"
21 #include "libsigrok-internal.h"
26 #define LOG_PREFIX "scpi"
28 #define SCPI_READ_RETRIES 100
29 #define SCPI_READ_RETRY_TIMEOUT 10000
32 * Parse a string representation of a boolean-like value into a gboolean.
33 * Similar to sr_parse_boolstring but rejects strings which do not represent
34 * a boolean-like value.
36 * @param str String to convert.
37 * @param ret Pointer to a gboolean where the result of the conversion will be
40 * @return SR_OK on success, SR_ERR on failure.
42 static int parse_strict_bool(const char *str, gboolean *ret)
47 if (!g_strcmp0(str, "1") ||
48 !g_ascii_strncasecmp(str, "y", 1) ||
49 !g_ascii_strncasecmp(str, "t", 1) ||
50 !g_ascii_strncasecmp(str, "yes", 3) ||
51 !g_ascii_strncasecmp(str, "true", 4) ||
52 !g_ascii_strncasecmp(str, "on", 2)) {
55 } else if (!g_strcmp0(str, "0") ||
56 !g_ascii_strncasecmp(str, "n", 1) ||
57 !g_ascii_strncasecmp(str, "f", 1) ||
58 !g_ascii_strncasecmp(str, "no", 2) ||
59 !g_ascii_strncasecmp(str, "false", 5) ||
60 !g_ascii_strncasecmp(str, "off", 3)) {
68 SR_PRIV extern const struct sr_scpi_dev_inst scpi_serial_dev;
69 SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_raw_dev;
70 SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_rigol_dev;
71 SR_PRIV extern const struct sr_scpi_dev_inst scpi_usbtmc_libusb_dev;
72 SR_PRIV extern const struct sr_scpi_dev_inst scpi_vxi_dev;
73 SR_PRIV extern const struct sr_scpi_dev_inst scpi_visa_dev;
74 SR_PRIV extern const struct sr_scpi_dev_inst scpi_libgpib_dev;
76 static const struct sr_scpi_dev_inst *scpi_devs[] = {
79 #ifdef HAVE_LIBUSB_1_0
80 &scpi_usbtmc_libusb_dev,
91 #ifdef HAVE_LIBSERIALPORT
92 &scpi_serial_dev, /* must be last as it matches any resource */
96 static struct sr_dev_inst *sr_scpi_scan_resource(struct drv_context *drvc,
97 const char *resource, const char *serialcomm,
98 struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi))
100 struct sr_scpi_dev_inst *scpi;
101 struct sr_dev_inst *sdi;
103 if (!(scpi = scpi_dev_inst_new(drvc, resource, serialcomm)))
106 if (sr_scpi_open(scpi) != SR_OK) {
107 sr_info("Couldn't open SCPI device.");
112 if ((sdi = probe_device(scpi)))
120 SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options,
121 struct sr_dev_inst *(*probe_device)(struct sr_scpi_dev_inst *scpi))
123 GSList *resources, *l, *devices;
124 struct sr_dev_inst *sdi;
125 const char *resource = NULL;
126 const char *serialcomm = NULL;
130 for (l = options; l; l = l->next) {
131 struct sr_config *src = l->data;
134 resource = g_variant_get_string(src->data, NULL);
136 case SR_CONF_SERIALCOMM:
137 serialcomm = g_variant_get_string(src->data, NULL);
143 for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) {
144 if ((resource && strcmp(resource, scpi_devs[i]->prefix))
145 || !scpi_devs[i]->scan)
147 resources = scpi_devs[i]->scan(drvc);
148 for (l = resources; l; l = l->next) {
149 res = g_strsplit(l->data, ":", 2);
150 if (res[0] && (sdi = sr_scpi_scan_resource(drvc, res[0],
151 serialcomm ? serialcomm : res[1], probe_device)))
152 devices = g_slist_append(devices, sdi);
155 g_slist_free_full(resources, g_free);
158 if (!devices && resource) {
159 sdi = sr_scpi_scan_resource(drvc, resource, serialcomm, probe_device);
161 devices = g_slist_append(NULL, sdi);
164 /* Tack a copy of the newly found devices onto the driver list. */
166 drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices));
171 SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc,
172 const char *resource, const char *serialcomm)
174 struct sr_scpi_dev_inst *scpi = NULL;
175 const struct sr_scpi_dev_inst *scpi_dev;
179 for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) {
180 scpi_dev = scpi_devs[i];
181 if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) {
182 sr_dbg("Opening %s device %s.", scpi_dev->name, resource);
183 scpi = g_malloc(sizeof(*scpi));
185 scpi->priv = g_malloc0(scpi->priv_size);
186 params = g_strsplit(resource, "/", 0);
187 if (scpi->dev_inst_new(scpi->priv, drvc, resource,
188 params, serialcomm) != SR_OK) {
203 * @param scpi Previously initialized SCPI device structure.
205 * @return SR_OK on success, SR_ERR on failure.
207 SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi)
209 return scpi->open(scpi->priv);
213 * Add an event source for an SCPI device.
215 * @param session The session to add the event source to.
216 * @param scpi Previously initialized SCPI device structure.
217 * @param events Events to check for.
218 * @param timeout Max time to wait before the callback is called, ignored if 0.
219 * @param cb Callback function to add. Must not be NULL.
220 * @param cb_data Data for the callback function. Can be NULL.
222 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
223 * SR_ERR_MALLOC upon memory allocation errors.
225 SR_PRIV int sr_scpi_source_add(struct sr_session *session,
226 struct sr_scpi_dev_inst *scpi, int events, int timeout,
227 sr_receive_data_callback cb, void *cb_data)
229 return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data);
233 * Remove event source for an SCPI device.
235 * @param session The session to remove the event source from.
236 * @param scpi Previously initialized SCPI device structure.
238 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
239 * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon
242 SR_PRIV int sr_scpi_source_remove(struct sr_session *session,
243 struct sr_scpi_dev_inst *scpi)
245 return scpi->source_remove(session, scpi->priv);
249 * Send a SCPI command.
251 * @param scpi Previously initialized SCPI device structure.
252 * @param format Format string, to be followed by any necessary arguments.
254 * @return SR_OK on success, SR_ERR on failure.
256 SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi,
257 const char *format, ...)
262 va_start(args, format);
263 ret = sr_scpi_send_variadic(scpi, format, args);
270 * Send a SCPI command with a variadic argument list.
272 * @param scpi Previously initialized SCPI device structure.
273 * @param format Format string.
274 * @param args Argument list.
276 * @return SR_OK on success, SR_ERR on failure.
278 SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi,
279 const char *format, va_list args)
285 /* Get length of buffer required. */
286 va_copy(args_copy, args);
287 len = vsnprintf(NULL, 0, format, args_copy);
290 /* Allocate buffer and write out command. */
291 buf = g_malloc(len + 1);
292 vsprintf(buf, format, args);
295 ret = scpi->send(scpi->priv, buf);
297 /* Free command buffer. */
304 * Begin receiving an SCPI reply.
306 * @param scpi Previously initialised SCPI device structure.
308 * @return SR_OK on success, SR_ERR on failure.
310 SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi)
312 return scpi->read_begin(scpi->priv);
316 * Read part of a response from SCPI device.
318 * @param scpi Previously initialised SCPI device structure.
319 * @param buf Buffer to store result.
320 * @param maxlen Maximum number of bytes to read.
322 * @return Number of bytes read, or SR_ERR upon failure.
324 SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi,
325 char *buf, int maxlen)
327 return scpi->read_data(scpi->priv, buf, maxlen);
331 * Check whether a complete SCPI response has been received.
333 * @param scpi Previously initialised SCPI device structure.
335 * @return 1 if complete, 0 otherwise.
337 SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi)
339 return scpi->read_complete(scpi->priv);
345 * @param scpi Previously initialized SCPI device structure.
347 * @return SR_OK on success, SR_ERR on failure.
349 SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi)
351 return scpi->close(scpi->priv);
357 * @param scpi Previously initialized SCPI device structure.
359 * @return SR_OK on success, SR_ERR on failure.
361 SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi)
363 scpi->free(scpi->priv);
369 * Send a SCPI command, receive the reply and store the reply in scpi_response.
371 * @param scpi Previously initialised SCPI device structure.
372 * @param command The SCPI command to send to the device (can be NULL).
373 * @param scpi_response Pointer where to store the SCPI response.
375 * @return SR_OK on success, SR_ERR on failure.
377 SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi,
378 const char *command, char **scpi_response)
385 if (sr_scpi_send(scpi, command) != SR_OK)
388 if (sr_scpi_read_begin(scpi) != SR_OK)
391 response = g_string_new("");
393 *scpi_response = NULL;
395 while (!sr_scpi_read_complete(scpi)) {
396 len = sr_scpi_read_data(scpi, buf, sizeof(buf));
398 g_string_free(response, TRUE);
401 g_string_append_len(response, buf, len);
404 /* Get rid of trailing linefeed if present */
405 if (response->len >= 1 && response->str[response->len - 1] == '\n')
406 g_string_truncate(response, response->len - 1);
408 /* Get rid of trailing carriage return if present */
409 if (response->len >= 1 && response->str[response->len - 1] == '\r')
410 g_string_truncate(response, response->len - 1);
412 *scpi_response = response->str;
413 g_string_free(response, FALSE);
415 sr_spew("Got response: '%.70s'.", *scpi_response);
421 * Send a SCPI command, read the reply, parse it as a bool value and store the
422 * result in scpi_response.
424 * @param scpi Previously initialised SCPI device structure.
425 * @param command The SCPI command to send to the device (can be NULL).
426 * @param scpi_response Pointer where to store the parsed result.
428 * @return SR_OK on success, SR_ERR on failure.
430 SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi,
431 const char *command, gboolean *scpi_response)
438 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
442 if (parse_strict_bool(response, scpi_response) == SR_OK)
453 * Send a SCPI command, read the reply, parse it as an integer and store the
454 * result in scpi_response.
456 * @param scpi Previously initialised SCPI device structure.
457 * @param command The SCPI command to send to the device (can be NULL).
458 * @param scpi_response Pointer where to store the parsed result.
460 * @return SR_OK on success, SR_ERR on failure.
462 SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi,
463 const char *command, int *scpi_response)
470 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
474 if (sr_atoi(response, scpi_response) == SR_OK)
485 * Send a SCPI command, read the reply, parse it as a float and store the
486 * result in scpi_response.
488 * @param scpi Previously initialised SCPI device structure.
489 * @param command The SCPI command to send to the device (can be NULL).
490 * @param scpi_response Pointer where to store the parsed result.
492 * @return SR_OK on success, SR_ERR on failure.
494 SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi,
495 const char *command, float *scpi_response)
502 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
506 if (sr_atof_ascii(response, scpi_response) == SR_OK)
517 * Send a SCPI command, read the reply, parse it as a double and store the
518 * result in scpi_response.
520 * @param scpi Previously initialised SCPI device structure.
521 * @param command The SCPI command to send to the device (can be NULL).
522 * @param scpi_response Pointer where to store the parsed result.
524 * @return SR_OK on success, SR_ERR on failure.
526 SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi,
527 const char *command, double *scpi_response)
534 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
538 if (sr_atod(response, scpi_response) == SR_OK)
549 * Send a SCPI *OPC? command, read the reply and return the result of the
552 * @param scpi Previously initialised SCPI device structure.
554 * @return SR_OK on success, SR_ERR on failure.
556 SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi)
561 for (i = 0; i < SCPI_READ_RETRIES; ++i) {
562 sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc);
565 g_usleep(SCPI_READ_RETRY_TIMEOUT);
572 * Send a SCPI command, read the reply, parse it as comma separated list of
573 * floats and store the as an result in scpi_response.
575 * @param scpi Previously initialised SCPI device structure.
576 * @param command The SCPI command to send to the device (can be NULL).
577 * @param scpi_response Pointer where to store the parsed result.
579 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
580 * error or upon no response. The allocated response must be freed by
581 * the caller in the case of an SR_OK as well as in the case of
584 SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi,
585 const char *command, GArray **scpi_response)
590 gchar **ptr, **tokens;
591 GArray *response_array;
597 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
601 tokens = g_strsplit(response, ",", 0);
604 response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256);
607 if (sr_atof_ascii(*ptr, &tmp) == SR_OK)
608 response_array = g_array_append_val(response_array,
618 if (ret == SR_ERR && response_array->len == 0) {
619 g_array_free(response_array, TRUE);
620 *scpi_response = NULL;
624 *scpi_response = response_array;
630 * Send a SCPI command, read the reply, parse it as comma separated list of
631 * unsigned 8 bit integers and store the as an result in scpi_response.
633 * @param scpi Previously initialised SCPI device structure.
634 * @param command The SCPI command to send to the device (can be NULL).
635 * @param scpi_response Pointer where to store the parsed result.
637 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
638 * error or upon no response. The allocated response must be freed by
639 * the caller in the case of an SR_OK as well as in the case of
642 SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi,
643 const char *command, GArray **scpi_response)
647 gchar **ptr, **tokens;
648 GArray *response_array;
654 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
658 tokens = g_strsplit(response, ",", 0);
661 response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256);
664 if (sr_atoi(*ptr, &tmp) == SR_OK)
665 response_array = g_array_append_val(response_array,
675 if (response_array->len == 0) {
676 g_array_free(response_array, TRUE);
677 *scpi_response = NULL;
681 *scpi_response = response_array;
687 * Send the *IDN? SCPI command, receive the reply, parse it and store the
688 * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer.
690 * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free().
692 * @param scpi Previously initialised SCPI device structure.
693 * @param scpi_response Pointer where to store the hw_info structure.
695 * @return SR_OK upon success, SR_ERR on failure.
697 SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi,
698 struct sr_scpi_hw_info **scpi_response)
703 struct sr_scpi_hw_info *hw_info;
708 if (sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response) != SR_OK)
712 sr_info("Got IDN string: '%s'", response);
715 * The response to a '*IDN?' is specified by the SCPI spec. It contains
716 * a comma-separated list containing the manufacturer name, instrument
717 * model, serial number of the instrument and the firmware version.
719 tokens = g_strsplit(response, ",", 0);
721 for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
723 if (num_tokens != 4) {
724 sr_dbg("IDN response not according to spec: %80.s.", response);
731 hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info));
734 return SR_ERR_MALLOC;
737 hw_info->manufacturer = g_strdup(tokens[0]);
738 hw_info->model = g_strdup(tokens[1]);
739 hw_info->serial_number = g_strdup(tokens[2]);
740 hw_info->firmware_version = g_strdup(tokens[3]);
744 *scpi_response = hw_info;
750 * Free a sr_scpi_hw_info struct.
752 * @param hw_info Pointer to the struct to free.
754 * This function is safe to call with a NULL pointer.
756 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info)
759 g_free(hw_info->manufacturer);
760 g_free(hw_info->model);
761 g_free(hw_info->serial_number);
762 g_free(hw_info->firmware_version);