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_dev;
70 SR_PRIV extern const struct sr_scpi_dev_inst scpi_usbtmc_dev;
71 SR_PRIV extern const struct sr_scpi_dev_inst scpi_vxi_dev;
73 static const struct sr_scpi_dev_inst *scpi_devs[] = {
79 #ifdef HAVE_LIBSERIALPORT
80 &scpi_serial_dev, /* must be last as it matches any resource */
84 SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(const char *resource,
85 const char *serialcomm)
87 struct sr_scpi_dev_inst *scpi = NULL;
88 const struct sr_scpi_dev_inst *scpi_dev;
92 for (i = 0; i < ARRAY_SIZE(scpi_devs); i++) {
93 scpi_dev = scpi_devs[i];
94 if (!strncmp(resource, scpi_dev->prefix, strlen(scpi_dev->prefix))) {
95 sr_dbg("Opening %s device %s.", scpi_dev->name, resource);
96 scpi = g_malloc(sizeof(*scpi));
98 scpi->priv = g_malloc0(scpi->priv_size);
99 params = g_strsplit(resource, "/", 0);
100 if (scpi->dev_inst_new(scpi->priv, resource,
101 params, serialcomm) != SR_OK) {
116 * @param scpi Previously initialized SCPI device structure.
118 * @return SR_OK on success, SR_ERR on failure.
120 SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi)
122 return scpi->open(scpi->priv);
126 * Add an event source for an SCPI device.
128 * @param scpi Previously initialized SCPI device structure.
129 * @param events Events to check for.
130 * @param timeout Max time to wait before the callback is called, ignored if 0.
131 * @param cb Callback function to add. Must not be NULL.
132 * @param cb_data Data for the callback function. Can be NULL.
134 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
135 * SR_ERR_MALLOC upon memory allocation errors.
137 SR_PRIV int sr_scpi_source_add(struct sr_scpi_dev_inst *scpi, int events,
138 int timeout, sr_receive_data_callback_t cb, void *cb_data)
140 return scpi->source_add(scpi->priv, events, timeout, cb, cb_data);
144 * Remove event source for an SCPI device.
146 * @param scpi Previously initialized SCPI device structure.
148 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
149 * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon
152 SR_PRIV int sr_scpi_source_remove(struct sr_scpi_dev_inst *scpi)
154 return scpi->source_remove(scpi->priv);
158 * Send a SCPI command.
160 * @param scpi Previously initialized SCPI device structure.
161 * @param format Format string, to be followed by any necessary arguments.
163 * @return SR_OK on success, SR_ERR on failure.
165 SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi,
166 const char *format, ...)
171 va_start(args, format);
172 ret = sr_scpi_send_variadic(scpi, format, args);
179 * Send a SCPI command with a variadic argument list.
181 * @param scpi Previously initialized SCPI device structure.
182 * @param format Format string.
183 * @param args Argument list.
185 * @return SR_OK on success, SR_ERR on failure.
187 SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi,
188 const char *format, va_list args)
194 /* Get length of buffer required. */
195 va_copy(args_copy, args);
196 len = vsnprintf(NULL, 0, format, args_copy);
199 /* Allocate buffer and write out command. */
200 buf = g_malloc(len + 1);
201 vsprintf(buf, format, args);
204 ret = scpi->send(scpi->priv, buf);
206 /* Free command buffer. */
213 * Begin receiving an SCPI reply.
215 * @param scpi Previously initialised SCPI device structure.
217 * @return SR_OK on success, SR_ERR on failure.
219 SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi)
221 return scpi->read_begin(scpi->priv);
225 * Read part of a response from SCPI device.
227 * @param scpi Previously initialised SCPI device structure.
228 * @param buf Buffer to store result.
229 * @param maxlen Maximum number of bytes to read.
231 * @return Number of bytes read, or SR_ERR upon failure.
233 SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi,
234 char *buf, int maxlen)
236 return scpi->read_data(scpi->priv, buf, maxlen);
240 * Check whether a complete SCPI response has been received.
242 * @param scpi Previously initialised SCPI device structure.
244 * @return 1 if complete, 0 otherwise.
246 SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi)
248 return scpi->read_complete(scpi->priv);
254 * @param scpi Previously initialized SCPI device structure.
256 * @return SR_OK on success, SR_ERR on failure.
258 SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi)
260 return scpi->close(scpi->priv);
266 * @param scpi Previously initialized SCPI device structure.
268 * @return SR_OK on success, SR_ERR on failure.
270 SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi)
272 scpi->free(scpi->priv);
278 * Send a SCPI command, receive the reply and store the reply in scpi_response.
280 * @param scpi Previously initialised SCPI device structure.
281 * @param command The SCPI command to send to the device (can be NULL).
282 * @param scpi_response Pointer where to store the SCPI response.
284 * @return SR_OK on success, SR_ERR on failure.
286 SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi,
287 const char *command, char **scpi_response)
294 if (sr_scpi_send(scpi, command) != SR_OK)
297 if (sr_scpi_read_begin(scpi) != SR_OK)
300 response = g_string_new("");
302 *scpi_response = NULL;
304 while (!sr_scpi_read_complete(scpi)) {
305 len = sr_scpi_read_data(scpi, buf, sizeof(buf));
307 g_string_free(response, TRUE);
310 g_string_append_len(response, buf, len);
313 *scpi_response = response->str;
314 g_string_free(response, FALSE);
320 * Send a SCPI command, read the reply, parse it as a bool value and store the
321 * result in scpi_response.
323 * @param scpi Previously initialised SCPI device structure.
324 * @param command The SCPI command to send to the device (can be NULL).
325 * @param scpi_response Pointer where to store the parsed result.
327 * @return SR_OK on success, SR_ERR on failure.
329 SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi,
330 const char *command, gboolean *scpi_response)
337 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
341 if (parse_strict_bool(response, scpi_response) == SR_OK)
352 * Send a SCPI command, read the reply, parse it as an integer and store the
353 * result in scpi_response.
355 * @param scpi Previously initialised SCPI device structure.
356 * @param command The SCPI command to send to the device (can be NULL).
357 * @param scpi_response Pointer where to store the parsed result.
359 * @return SR_OK on success, SR_ERR on failure.
361 SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi,
362 const char *command, int *scpi_response)
369 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
373 if (sr_atoi(response, scpi_response) == SR_OK)
384 * Send a SCPI command, read the reply, parse it as a float and store the
385 * result in scpi_response.
387 * @param scpi Previously initialised SCPI device structure.
388 * @param command The SCPI command to send to the device (can be NULL).
389 * @param scpi_response Pointer where to store the parsed result.
391 * @return SR_OK on success, SR_ERR on failure.
393 SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi,
394 const char *command, float *scpi_response)
401 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
405 if (sr_atof(response, scpi_response) == SR_OK)
416 * Send a SCPI command, read the reply, parse it as a double 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_double(struct sr_scpi_dev_inst *scpi,
426 const char *command, double *scpi_response)
433 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
437 if (sr_atod(response, scpi_response) == SR_OK)
448 * Send a SCPI *OPC? command, read the reply and return the result of the
451 * @param scpi Previously initialised SCPI device structure.
453 * @return SR_OK on success, SR_ERR on failure.
455 SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi)
460 for (i = 0; i < SCPI_READ_RETRIES; ++i) {
461 sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc);
464 g_usleep(SCPI_READ_RETRY_TIMEOUT);
471 * Send a SCPI command, read the reply, parse it as comma separated list of
472 * floats and store the as an result in scpi_response.
474 * @param scpi Previously initialised SCPI device structure.
475 * @param command The SCPI command to send to the device (can be NULL).
476 * @param scpi_response Pointer where to store the parsed result.
478 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
479 * error or upon no response. The allocated response must be freed by
480 * the caller in the case of an SR_OK as well as in the case of
483 SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi,
484 const char *command, GArray **scpi_response)
489 gchar **ptr, **tokens;
490 GArray *response_array;
496 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
500 tokens = g_strsplit(response, ",", 0);
503 response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256);
506 if (sr_atof(*ptr, &tmp) == SR_OK)
507 response_array = g_array_append_val(response_array,
517 if (ret == SR_ERR && response_array->len == 0) {
518 g_array_free(response_array, TRUE);
519 *scpi_response = NULL;
523 *scpi_response = response_array;
529 * Send a SCPI command, read the reply, parse it as comma separated list of
530 * unsigned 8 bit integers and store the as an result in scpi_response.
532 * @param scpi Previously initialised SCPI device structure.
533 * @param command The SCPI command to send to the device (can be NULL).
534 * @param scpi_response Pointer where to store the parsed result.
536 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
537 * error or upon no response. The allocated response must be freed by
538 * the caller in the case of an SR_OK as well as in the case of
541 SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi,
542 const char *command, GArray **scpi_response)
546 gchar **ptr, **tokens;
547 GArray *response_array;
553 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
557 tokens = g_strsplit(response, ",", 0);
560 response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256);
563 if (sr_atoi(*ptr, &tmp) == SR_OK)
564 response_array = g_array_append_val(response_array,
574 if (response_array->len == 0) {
575 g_array_free(response_array, TRUE);
576 *scpi_response = NULL;
580 *scpi_response = response_array;
586 * Send the *IDN? SCPI command, receive the reply, parse it and store the
587 * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer.
589 * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free().
591 * @param scpi Previously initialised SCPI device structure.
592 * @param scpi_response Pointer where to store the hw_info structure.
594 * @return SR_OK upon success, SR_ERR on failure.
596 SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi,
597 struct sr_scpi_hw_info **scpi_response)
603 struct sr_scpi_hw_info *hw_info;
608 if (sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response) != SR_OK)
612 sr_info("Got IDN string: '%s'", response);
614 /* Remove trailing newline if present. */
615 if ((newline = g_strrstr(response, "\n")))
619 * The response to a '*IDN?' is specified by the SCPI spec. It contains
620 * a comma-separated list containing the manufacturer name, instrument
621 * model, serial number of the instrument and the firmware version.
623 tokens = g_strsplit(response, ",", 0);
625 for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
627 if (num_tokens != 4) {
628 sr_dbg("IDN response not according to spec: %80.s.", response);
635 hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info));
638 return SR_ERR_MALLOC;
641 hw_info->manufacturer = g_strdup(tokens[0]);
642 hw_info->model = g_strdup(tokens[1]);
643 hw_info->serial_number = g_strdup(tokens[2]);
644 hw_info->firmware_version = g_strdup(tokens[3]);
648 *scpi_response = hw_info;
654 * Free a sr_scpi_hw_info struct.
656 * @param hw_info Pointer to the struct to free.
658 * This function is safe to call with a NULL pointer.
660 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info)
663 g_free(hw_info->manufacturer);
664 g_free(hw_info->model);
665 g_free(hw_info->serial_number);
666 g_free(hw_info->firmware_version);