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 /* Message logging helpers with subsystem-specific prefix string. */
27 #define LOG_PREFIX "scpi: "
28 #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
29 #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
30 #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
31 #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
32 #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
34 #define SCPI_READ_RETRIES 100
35 #define SCPI_READ_RETRY_TIMEOUT 10000
38 * Parse a string representation of a boolean-like value into a gboolean.
39 * Similar to sr_parse_boolstring but rejects strings which do not represent
40 * a boolean-like value.
42 * @param str String to convert.
43 * @param ret Pointer to a gboolean where the result of the conversion will be
46 * @return SR_OK on success, SR_ERR on failure.
48 static int parse_strict_bool(const char *str, gboolean *ret)
53 if (!g_strcmp0(str, "1") ||
54 !g_ascii_strncasecmp(str, "y", 1) ||
55 !g_ascii_strncasecmp(str, "t", 1) ||
56 !g_ascii_strncasecmp(str, "yes", 3) ||
57 !g_ascii_strncasecmp(str, "true", 4) ||
58 !g_ascii_strncasecmp(str, "on", 2)) {
61 } else if (!g_strcmp0(str, "0") ||
62 !g_ascii_strncasecmp(str, "n", 1) ||
63 !g_ascii_strncasecmp(str, "f", 1) ||
64 !g_ascii_strncasecmp(str, "no", 2) ||
65 !g_ascii_strncasecmp(str, "false", 5) ||
66 !g_ascii_strncasecmp(str, "off", 3)) {
77 * @param scpi Previously initialized SCPI device structure.
79 * @return SR_OK on success, SR_ERR on failure.
81 SR_PRIV int sr_scpi_open(struct sr_scpi_dev_inst *scpi)
83 return scpi->open(scpi->priv);
87 * Add an event source for an SCPI device.
89 * @param scpi Previously initialized SCPI device structure.
90 * @param events Events to check for.
91 * @param timeout Max time to wait before the callback is called, ignored if 0.
92 * @param cb Callback function to add. Must not be NULL.
93 * @param cb_data Data for the callback function. Can be NULL.
95 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
96 * SR_ERR_MALLOC upon memory allocation errors.
98 SR_PRIV int sr_scpi_source_add(struct sr_scpi_dev_inst *scpi, int events,
99 int timeout, sr_receive_data_callback_t cb, void *cb_data)
101 return scpi->source_add(scpi->priv, events, timeout, cb, cb_data);
105 * Remove event source for an SCPI device.
107 * @param scpi Previously initialized SCPI device structure.
109 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
110 * SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon
113 SR_PRIV int sr_scpi_source_remove(struct sr_scpi_dev_inst *scpi)
115 return scpi->source_remove(scpi->priv);
119 * Send a SCPI command.
121 * @param scpi Previously initialized SCPI device structure.
122 * @param command The SCPI command to send to the device.
124 * @return SR_OK on success, SR_ERR on failure.
126 SR_PRIV int sr_scpi_send(struct sr_scpi_dev_inst *scpi,
129 return scpi->send(scpi->priv, command);
133 * Receive an SCPI reply and store the reply in scpi_response.
135 * @param scpi Previously initialised SCPI device structure.
136 * @param scpi_response Pointer where to store the SCPI response.
138 * @return SR_OK upon fetching a full SCPI response, SR_ERR upon fetching an
139 * incomplete or no response. The allocated response must be freed by
140 * the caller in the case of a full response as well in the case of
143 SR_PRIV int sr_scpi_receive(struct sr_scpi_dev_inst *scpi,
144 char **scpi_response)
146 return scpi->receive(scpi->priv, scpi_response);
152 * @param scpi Previously initialized SCPI device structure.
154 * @return SR_OK on success, SR_ERR on failure.
156 SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi)
158 return scpi->close(scpi->priv);
164 * @param scpi Previously initialized SCPI device structure.
166 * @return SR_OK on success, SR_ERR on failure.
168 SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi)
170 scpi->free(scpi->priv);
175 * Send a SCPI command, receive the reply and store the reply in scpi_response.
177 * @param scpi Previously initialised SCPI device structure.
178 * @param command The SCPI command to send to the device (can be NULL).
179 * @param scpi_response Pointer where to store the SCPI response.
181 * @return SR_OK upon fetching a full SCPI response, SR_ERR upon fetching an
182 * incomplete or no response. The allocated response must be freed by
183 * the caller in the case of a full response as well in the case of
186 SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi,
187 const char *command, char **scpi_response)
190 if (sr_scpi_send(scpi, command) != SR_OK)
193 return sr_scpi_receive(scpi, scpi_response);
197 * Send a SCPI command, read the reply, parse it as a bool value and store the
198 * result in scpi_response.
200 * @param scpi Previously initialised SCPI device structure.
201 * @param command The SCPI command to send to the device (can be NULL).
202 * @param scpi_response Pointer where to store the parsed result.
204 * @return SR_OK on success, SR_ERR on failure.
206 SR_PRIV int sr_scpi_get_bool(struct sr_scpi_dev_inst *scpi,
207 const char *command, gboolean *scpi_response)
214 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
218 if (parse_strict_bool(response, scpi_response) == SR_OK)
229 * Send a SCPI command, read the reply, parse it as an integer and store the
230 * result in scpi_response.
232 * @param scpi Previously initialised SCPI device structure.
233 * @param command The SCPI command to send to the device (can be NULL).
234 * @param scpi_response Pointer where to store the parsed result.
236 * @return SR_OK on success, SR_ERR on failure.
238 SR_PRIV int sr_scpi_get_int(struct sr_scpi_dev_inst *scpi,
239 const char *command, int *scpi_response)
246 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
250 if (sr_atoi(response, scpi_response) == SR_OK)
261 * Send a SCPI command, read the reply, parse it as a float and store the
262 * result in scpi_response.
264 * @param scpi Previously initialised SCPI device structure.
265 * @param command The SCPI command to send to the device (can be NULL).
266 * @param scpi_response Pointer where to store the parsed result.
268 * @return SR_OK on success, SR_ERR on failure.
270 SR_PRIV int sr_scpi_get_float(struct sr_scpi_dev_inst *scpi,
271 const char *command, float *scpi_response)
278 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
282 if (sr_atof(response, scpi_response) == SR_OK)
293 * Send a SCPI command, read the reply, parse it as a double and store the
294 * result in scpi_response.
296 * @param scpi Previously initialised SCPI device structure.
297 * @param command The SCPI command to send to the device (can be NULL).
298 * @param scpi_response Pointer where to store the parsed result.
300 * @return SR_OK on success, SR_ERR on failure.
302 SR_PRIV int sr_scpi_get_double(struct sr_scpi_dev_inst *scpi,
303 const char *command, double *scpi_response)
310 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
314 if (sr_atod(response, scpi_response) == SR_OK)
325 * Send a SCPI *OPC? command, read the reply and return the result of the
328 * @param scpi Previously initialised SCPI device structure.
330 * @return SR_OK on success, SR_ERR on failure.
332 SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi)
337 for (i = 0; i < SCPI_READ_RETRIES; ++i) {
338 sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc);
341 g_usleep(SCPI_READ_RETRY_TIMEOUT);
348 * Send a SCPI command, read the reply, parse it as comma separated list of
349 * floats and store the as an result in scpi_response.
351 * @param scpi Previously initialised SCPI device structure.
352 * @param command The SCPI command to send to the device (can be NULL).
353 * @param scpi_response Pointer where to store the parsed result.
355 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
356 * error or upon no response. The allocated response must be freed by
357 * the caller in the case of an SR_OK as well as in the case of
360 SR_PRIV int sr_scpi_get_floatv(struct sr_scpi_dev_inst *scpi,
361 const char *command, GArray **scpi_response)
366 gchar **ptr, **tokens;
367 GArray *response_array;
373 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
377 tokens = g_strsplit(response, ",", 0);
380 response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256);
383 if (sr_atof(*ptr, &tmp) == SR_OK)
384 response_array = g_array_append_val(response_array,
394 if (ret == SR_ERR && response_array->len == 0) {
395 g_array_free(response_array, TRUE);
396 *scpi_response = NULL;
400 *scpi_response = response_array;
406 * Send a SCPI command, read the reply, parse it as comma separated list of
407 * unsigned 8 bit integers and store the as an result in scpi_response.
409 * @param scpi Previously initialised SCPI device structure.
410 * @param command The SCPI command to send to the device (can be NULL).
411 * @param scpi_response Pointer where to store the parsed result.
413 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
414 * error or upon no response. The allocated response must be freed by
415 * the caller in the case of an SR_OK as well as in the case of
418 SR_PRIV int sr_scpi_get_uint8v(struct sr_scpi_dev_inst *scpi,
419 const char *command, GArray **scpi_response)
423 gchar **ptr, **tokens;
424 GArray *response_array;
430 if (sr_scpi_get_string(scpi, command, &response) != SR_OK)
434 tokens = g_strsplit(response, ",", 0);
437 response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256);
440 if (sr_atoi(*ptr, &tmp) == SR_OK)
441 response_array = g_array_append_val(response_array,
451 if (response_array->len == 0) {
452 g_array_free(response_array, TRUE);
453 *scpi_response = NULL;
457 *scpi_response = response_array;
463 * Send the *IDN? SCPI command, receive the reply, parse it and store the
464 * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer.
466 * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free().
468 * @param scpi Previously initialised SCPI device structure.
469 * @param scpi_response Pointer where to store the hw_info structure.
471 * @return SR_OK upon success, SR_ERR on failure.
473 SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi,
474 struct sr_scpi_hw_info **scpi_response)
479 struct sr_scpi_hw_info *hw_info;
484 if (sr_scpi_get_string(scpi, SCPI_CMD_IDN, &response) != SR_OK)
489 * The response to a '*IDN?' is specified by the SCPI spec. It contains
490 * a comma-separated list containing the manufacturer name, instrument
491 * model, serial number of the instrument and the firmware version.
493 tokens = g_strsplit(response, ",", 0);
495 for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
497 if (num_tokens != 4) {
498 sr_dbg("IDN response not according to spec: %80.s.", response);
505 hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info));
508 return SR_ERR_MALLOC;
511 hw_info->manufacturer = g_strdup(tokens[0]);
512 hw_info->model = g_strdup(tokens[1]);
513 hw_info->serial_number = g_strdup(tokens[2]);
514 hw_info->firmware_version = g_strdup(tokens[3]);
518 *scpi_response = hw_info;
524 * Free a sr_scpi_hw_info struct.
526 * @param hw_info Pointer to the struct to free.
528 * This function is safe to call with a NULL pointer.
530 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info)
533 g_free(hw_info->manufacturer);
534 g_free(hw_info->model);
535 g_free(hw_info->serial_number);
536 g_free(hw_info->firmware_version);