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_gpib_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);
160 devices = g_slist_append(NULL, sdi);
163 /* Tack a copy of the newly found devices onto the driver list. */
165 drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices));
170 SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc,
171 const char *resource, const char *serialcomm)
173 struct sr_scpi_dev_inst *scpi = NULL;
174 const struct sr_scpi_dev_inst *scpi_dev;
178 for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) {
179 scpi_dev = scpi_devs[i];
180 if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) {
181 sr_dbg("Opening %s device %s.", scpi_dev->name, resource);
182 scpi = g_malloc(sizeof(*scpi));
184 scpi->priv = g_malloc0(scpi->priv_size);
185 params = g_strsplit(resource, "/", 0);
186 if (scpi->dev_inst_new(scpi->priv, drvc, resource,
187 params, serialcomm) != SR_OK) {
202 * @param scpi Previously initialized SCPI device structure.
204 * @return SR_OK on success, SR_ERR on failure.
206 SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi)
208 return scpi->open(scpi->priv);
212 * Add an event source for an SCPI device.
214 * @param session The session to add the event source to.
215 * @param scpi Previously initialized SCPI device structure.
216 * @param events Events to check for.
217 * @param timeout Max time to wait before the callback is called, ignored if 0.
218 * @param cb Callback function to add. Must not be NULL.
219 * @param cb_data Data for the callback function. Can be NULL.
221 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
222 * SR_ERR_MALLOC upon memory allocation errors.
224 SR_PRIV int sr_scpi_source_add(struct sr_session *session,
225 struct sr_scpi_dev_inst *scpi, int events, int timeout,
226 sr_receive_data_callback cb, void *cb_data)
228 return scpi->source_add(session, scpi->priv, events, timeout, cb, cb_data);
232 * Remove event source for an SCPI device.
234 * @param session The session to remove the event source from.
235 * @param scpi Previously initialized SCPI device structure.
237 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
238 * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon
241 SR_PRIV int sr_scpi_source_remove(struct sr_session *session,
242 struct sr_scpi_dev_inst *scpi)
244 return scpi->source_remove(session, scpi->priv);
248 * Send a SCPI command.
250 * @param scpi Previously initialized SCPI device structure.
251 * @param format Format string, to be followed by any necessary arguments.
253 * @return SR_OK on success, SR_ERR on failure.
255 SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi,
256 const char *format, ...)
261 va_start(args, format);
262 ret = sr_scpi_send_variadic(scpi, format, args);
269 * Send a SCPI command with a variadic argument list.
271 * @param scpi Previously initialized SCPI device structure.
272 * @param format Format string.
273 * @param args Argument list.
275 * @return SR_OK on success, SR_ERR on failure.
277 SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi,
278 const char *format, va_list args)
284 /* Get length of buffer required. */
285 va_copy(args_copy, args);
286 len = vsnprintf(NULL, 0, format, args_copy);
289 /* Allocate buffer and write out command. */
290 buf = g_malloc(len + 1);
291 vsprintf(buf, format, args);
294 ret = scpi->send(scpi->priv, buf);
296 /* Free command buffer. */
303 * Begin receiving an SCPI reply.
305 * @param scpi Previously initialised SCPI device structure.
307 * @return SR_OK on success, SR_ERR on failure.
309 SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi)
311 return scpi->read_begin(scpi->priv);
315 * Read part of a response from SCPI device.
317 * @param scpi Previously initialised SCPI device structure.
318 * @param buf Buffer to store result.
319 * @param maxlen Maximum number of bytes to read.
321 * @return Number of bytes read, or SR_ERR upon failure.
323 SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi,
324 char *buf, int maxlen)
326 return scpi->read_data(scpi->priv, buf, maxlen);
330 * Check whether a complete SCPI response has been received.
332 * @param scpi Previously initialised SCPI device structure.
334 * @return 1 if complete, 0 otherwise.
336 SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi)
338 return scpi->read_complete(scpi->priv);
344 * @param scpi Previously initialized SCPI device structure.
346 * @return SR_OK on success, SR_ERR on failure.
348 SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi)
350 return scpi->close(scpi->priv);
356 * @param scpi Previously initialized SCPI device structure.
358 * @return SR_OK on success, SR_ERR on failure.
360 SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi)
362 scpi->free(scpi->priv);
368 * Send a SCPI command, receive the reply and store the reply in scpi_response.
370 * @param scpi Previously initialised SCPI device structure.
371 * @param command The SCPI command to send to the device (can be NULL).
372 * @param scpi_response Pointer where to store the SCPI response.
374 * @return SR_OK on success, SR_ERR on failure.
376 SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi,
377 const char *command, char **scpi_response)
384 if (sr_scpi_send(scpi, command) != SR_OK)
387 if (sr_scpi_read_begin(scpi) != SR_OK)
390 response = g_string_new("");
392 *scpi_response = NULL;
394 while (!sr_scpi_read_complete(scpi)) {
395 len = sr_scpi_read_data(scpi, buf, sizeof(buf));
397 g_string_free(response, TRUE);
400 g_string_append_len(response, buf, len);
403 /* Get rid of trailing linefeed if present */
404 if (response->len >= 1 && response->str[response->len - 1] == '\n')
405 g_string_truncate(response, response->len - 1);
407 *scpi_response = response->str;
408 g_string_free(response, FALSE);
410 sr_spew("Got response: '%.70s'.", *scpi_response);
416 * Send a SCPI command, read the reply, parse it as a bool value and store the
417 * result in scpi_response.
419 * @param scpi Previously initialised SCPI device structure.
420 * @param command The SCPI command to send to the device (can be NULL).
421 * @param scpi_response Pointer where to store the parsed result.
423 * @return SR_OK on success, SR_ERR on failure.
425 SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi,
426 const char *command, gboolean *scpi_response)
433 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
437 if (parse_strict_bool(response, scpi_response) == SR_OK)
448 * Send a SCPI command, read the reply, parse it as an integer and store the
449 * result in scpi_response.
451 * @param scpi Previously initialised SCPI device structure.
452 * @param command The SCPI command to send to the device (can be NULL).
453 * @param scpi_response Pointer where to store the parsed result.
455 * @return SR_OK on success, SR_ERR on failure.
457 SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi,
458 const char *command, int *scpi_response)
465 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
469 if (sr_atoi(response, scpi_response) == SR_OK)
480 * Send a SCPI command, read the reply, parse it as a float and store the
481 * result in scpi_response.
483 * @param scpi Previously initialised SCPI device structure.
484 * @param command The SCPI command to send to the device (can be NULL).
485 * @param scpi_response Pointer where to store the parsed result.
487 * @return SR_OK on success, SR_ERR on failure.
489 SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi,
490 const char *command, float *scpi_response)
497 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
501 if (sr_atof_ascii(response, scpi_response) == SR_OK)
512 * Send a SCPI command, read the reply, parse it as a double and store the
513 * result in scpi_response.
515 * @param scpi Previously initialised SCPI device structure.
516 * @param command The SCPI command to send to the device (can be NULL).
517 * @param scpi_response Pointer where to store the parsed result.
519 * @return SR_OK on success, SR_ERR on failure.
521 SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi,
522 const char *command, double *scpi_response)
529 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
533 if (sr_atod(response, scpi_response) == SR_OK)
544 * Send a SCPI *OPC? command, read the reply and return the result of the
547 * @param scpi Previously initialised SCPI device structure.
549 * @return SR_OK on success, SR_ERR on failure.
551 SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi)
556 for (i = 0; i < SCPI_READ_RETRIES; ++i) {
557 sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc);
560 g_usleep(SCPI_READ_RETRY_TIMEOUT);
567 * Send a SCPI command, read the reply, parse it as comma separated list of
568 * floats and store the as an result in scpi_response.
570 * @param scpi Previously initialised SCPI device structure.
571 * @param command The SCPI command to send to the device (can be NULL).
572 * @param scpi_response Pointer where to store the parsed result.
574 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
575 * error or upon no response. The allocated response must be freed by
576 * the caller in the case of an SR_OK as well as in the case of
579 SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi,
580 const char *command, GArray **scpi_response)
585 gchar **ptr, **tokens;
586 GArray *response_array;
592 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
596 tokens = g_strsplit(response, ",", 0);
599 response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256);
602 if (sr_atof_ascii(*ptr, &tmp) == SR_OK)
603 response_array = g_array_append_val(response_array,
613 if (ret == SR_ERR && response_array->len == 0) {
614 g_array_free(response_array, TRUE);
615 *scpi_response = NULL;
619 *scpi_response = response_array;
625 * Send a SCPI command, read the reply, parse it as comma separated list of
626 * unsigned 8 bit integers and store the as an result in scpi_response.
628 * @param scpi Previously initialised SCPI device structure.
629 * @param command The SCPI command to send to the device (can be NULL).
630 * @param scpi_response Pointer where to store the parsed result.
632 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
633 * error or upon no response. The allocated response must be freed by
634 * the caller in the case of an SR_OK as well as in the case of
637 SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi,
638 const char *command, GArray **scpi_response)
642 gchar **ptr, **tokens;
643 GArray *response_array;
649 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
653 tokens = g_strsplit(response, ",", 0);
656 response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256);
659 if (sr_atoi(*ptr, &tmp) == SR_OK)
660 response_array = g_array_append_val(response_array,
670 if (response_array->len == 0) {
671 g_array_free(response_array, TRUE);
672 *scpi_response = NULL;
676 *scpi_response = response_array;
682 * Send the *IDN? SCPI command, receive the reply, parse it and store the
683 * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer.
685 * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free().
687 * @param scpi Previously initialised SCPI device structure.
688 * @param scpi_response Pointer where to store the hw_info structure.
690 * @return SR_OK upon success, SR_ERR on failure.
692 SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi,
693 struct sr_scpi_hw_info **scpi_response)
698 struct sr_scpi_hw_info *hw_info;
703 if (sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response) != SR_OK)
707 sr_info("Got IDN string: '%s'", response);
710 * The response to a '*IDN?' is specified by the SCPI spec. It contains
711 * a comma-separated list containing the manufacturer name, instrument
712 * model, serial number of the instrument and the firmware version.
714 tokens = g_strsplit(response, ",", 0);
716 for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
718 if (num_tokens != 4) {
719 sr_dbg("IDN response not according to spec: %80.s.", response);
726 hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info));
729 return SR_ERR_MALLOC;
732 hw_info->manufacturer = g_strdup(tokens[0]);
733 hw_info->model = g_strdup(tokens[1]);
734 hw_info->serial_number = g_strdup(tokens[2]);
735 hw_info->firmware_version = g_strdup(tokens[3]);
739 *scpi_response = hw_info;
745 * Free a sr_scpi_hw_info struct.
747 * @param hw_info Pointer to the struct to free.
749 * This function is safe to call with a NULL pointer.
751 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info)
754 g_free(hw_info->manufacturer);
755 g_free(hw_info->model);
756 g_free(hw_info->serial_number);
757 g_free(hw_info->firmware_version);