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)) {
75 * Send a SCPI command.
77 * @param serial Previously initialized serial port structure.
78 * @param command The SCPI command to send to the device.
80 * @return SR_OK on success, SR_ERR on failure.
82 SR_PRIV int sr_scpi_send(struct sr_serial_dev_inst *serial,
86 gchar *terminated_command;
88 terminated_command = g_strconcat(command, "\n", NULL);
89 len = strlen(terminated_command);
90 out = serial_write(serial, terminated_command, len);
91 g_free(terminated_command);
94 sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out,
99 sr_spew("Successfully sent SCPI command: '%s'.", command);
105 * Send a SCPI command, receive the reply and store the reply in scpi_response.
107 * @param serial Previously initialized serial port structure.
108 * @param command The SCPI command to send to the device (can be NULL).
109 * @param scpi_response Pointer where to store the SCPI response.
111 * @return SR_OK upon fetching a full SCPI response, SR_ERR upon fetching an
112 * incomplete or no response. The allocated response must be freed by
113 * the caller in the case of a full response as well in the case of
116 SR_PRIV int sr_scpi_get_string(struct sr_serial_dev_inst *serial,
117 const char *command, char **scpi_response)
125 if (sr_scpi_send(serial, command) != SR_OK)
128 response = g_string_sized_new(1024);
130 for (i = 0; i <= SCPI_READ_RETRIES; i++) {
131 while ((len = serial_read(serial, buf, sizeof(buf))) > 0)
132 response = g_string_append_len(response, buf, len);
134 if (response->len > 0 &&
135 response->str[response->len-1] == '\n') {
136 sr_spew("Fetched full SCPI response.");
140 g_usleep(SCPI_READ_RETRY_TIMEOUT);
143 if (response->len == 0) {
144 sr_dbg("No SCPI response received.");
145 g_string_free(response, TRUE);
146 *scpi_response = NULL;
148 } else if (response->str[response->len - 1] == '\n') {
150 * The SCPI response contains a LF ('\n') at the end and we
151 * don't need this so replace it with a '\0' and decrement
154 response->str[--response->len] = '\0';
157 sr_warn("Incomplete SCPI response received!");
161 /* Minor optimization: steal the string instead of copying. */
162 *scpi_response = response->str;
164 /* A SCPI response can be quite large, print at most 50 characters. */
165 sr_dbg("SCPI response for command %s received (length %d): '%.50s'",
166 command, response->len, response->str);
168 g_string_free(response, FALSE);
174 * Send a SCPI command, read the reply, parse it as a bool value and store the
175 * result in scpi_response.
177 * @param serial Previously initialized serial port structure.
178 * @param command The SCPI command to send to the device (can be NULL).
179 * @param scpi_response Pointer where to store the parsed result.
181 * @return SR_OK on success, SR_ERR on failure.
183 SR_PRIV int sr_scpi_get_bool(struct sr_serial_dev_inst *serial,
184 const char *command, gboolean *scpi_response)
191 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
195 if (parse_strict_bool(response, scpi_response) == SR_OK)
206 * Send a SCPI command, read the reply, parse it as an integer and store the
207 * result in scpi_response.
209 * @param serial Previously initialized serial port structure.
210 * @param command The SCPI command to send to the device (can be NULL).
211 * @param scpi_response Pointer where to store the parsed result.
213 * @return SR_OK on success, SR_ERR on failure.
215 SR_PRIV int sr_scpi_get_int(struct sr_serial_dev_inst *serial,
216 const char *command, int *scpi_response)
223 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
227 if (sr_atoi(response, scpi_response) == SR_OK)
238 * Send a SCPI command, read the reply, parse it as a float and store the
239 * result in scpi_response.
241 * @param serial Previously initialized serial port structure.
242 * @param command The SCPI command to send to the device (can be NULL).
243 * @param scpi_response Pointer where to store the parsed result.
245 * @return SR_OK on success, SR_ERR on failure.
247 SR_PRIV int sr_scpi_get_float(struct sr_serial_dev_inst *serial,
248 const char *command, float *scpi_response)
255 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
259 if (sr_atof(response, scpi_response) == SR_OK)
270 * Send a SCPI command, read the reply, parse it as a double and store the
271 * result in scpi_response.
273 * @param serial Previously initialized serial port structure.
274 * @param command The SCPI command to send to the device (can be NULL).
275 * @param scpi_response Pointer where to store the parsed result.
277 * @return SR_OK on success, SR_ERR on failure.
279 SR_PRIV int sr_scpi_get_double(struct sr_serial_dev_inst *serial,
280 const char *command, double *scpi_response)
287 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
291 if (sr_atod(response, scpi_response) == SR_OK)
302 * Send a SCPI *OPC? command, read the reply and return the result of the
305 * @param serial Previously initialized serial port structure.
307 * @return SR_OK on success, SR_ERR on failure.
309 SR_PRIV int sr_scpi_get_opc(struct sr_serial_dev_inst *serial)
314 for (i = 0; i < SCPI_READ_RETRIES; ++i) {
315 sr_scpi_get_bool(serial, SCPI_CMD_OPC, &opc);
318 g_usleep(SCPI_READ_RETRY_TIMEOUT);
325 * Send a SCPI command, read the reply, parse it as comma separated list of
326 * floats and store the as an result in scpi_response.
328 * @param serial Previously initialized serial port structure.
329 * @param command The SCPI command to send to the device (can be NULL).
330 * @param scpi_response Pointer where to store the parsed result.
332 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
333 * error or upon no response. The allocated response must be freed by
334 * the caller in the case of an SR_OK as well as in the case of
337 SR_PRIV int sr_scpi_get_floatv(struct sr_serial_dev_inst *serial,
338 const char *command, GArray **scpi_response)
343 gchar **ptr, **tokens;
344 GArray *response_array;
350 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
354 tokens = g_strsplit(response, ",", 0);
357 response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256);
360 if (sr_atof(*ptr, &tmp) == SR_OK)
361 response_array = g_array_append_val(response_array,
371 if (ret == SR_ERR && response_array->len == 0) {
372 g_array_free(response_array, TRUE);
373 *scpi_response = NULL;
377 *scpi_response = response_array;
383 * Send a SCPI command, read the reply, parse it as comma separated list of
384 * unsigned 8 bit integers and store the as an result in scpi_response.
386 * @param serial Previously initialized serial port structure.
387 * @param command The SCPI command to send to the device (can be NULL).
388 * @param scpi_response Pointer where to store the parsed result.
390 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
391 * error or upon no response. The allocated response must be freed by
392 * the caller in the case of an SR_OK as well as in the case of
395 SR_PRIV int sr_scpi_get_uint8v(struct sr_serial_dev_inst *serial,
396 const char *command, GArray **scpi_response)
400 gchar **ptr, **tokens;
401 GArray *response_array;
407 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
411 tokens = g_strsplit(response, ",", 0);
414 response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256);
417 if (sr_atoi(*ptr, &tmp) == SR_OK)
418 response_array = g_array_append_val(response_array,
428 if (response_array->len == 0) {
429 g_array_free(response_array, TRUE);
430 *scpi_response = NULL;
434 *scpi_response = response_array;
440 * Send the *IDN? SCPI command, receive the reply, parse it and store the
441 * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer.
443 * The hw_info structure must be freed by the caller via sr_scpi_hw_info_free().
445 * @param serial Previously initialized serial port structure.
446 * @param scpi_response Pointer where to store the hw_info structure.
448 * @return SR_OK upon success, SR_ERR on failure.
450 SR_PRIV int sr_scpi_get_hw_id(struct sr_serial_dev_inst *serial,
451 struct sr_scpi_hw_info **scpi_response)
456 struct sr_scpi_hw_info *hw_info;
461 if (sr_scpi_get_string(serial, SCPI_CMD_IDN, &response) != SR_OK)
466 * The response to a '*IDN?' is specified by the SCPI spec. It contains
467 * a comma-separated list containing the manufacturer name, instrument
468 * model, serial number of the instrument and the firmware version.
470 tokens = g_strsplit(response, ",", 0);
472 for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
474 if (num_tokens != 4) {
475 sr_dbg("IDN response not according to spec: %80.s.", response);
482 hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info));
485 return SR_ERR_MALLOC;
488 hw_info->manufacturer = g_strdup(tokens[0]);
489 hw_info->model = g_strdup(tokens[1]);
490 hw_info->serial_number = g_strdup(tokens[2]);
491 hw_info->firmware_version = g_strdup(tokens[3]);
495 *scpi_response = hw_info;
501 * Free a sr_scpi_hw_info struct.
503 * @param hw_info Pointer to the struct to free.
505 * This function is safe to call with a NULL pointer.
507 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info)
510 g_free(hw_info->manufacturer);
511 g_free(hw_info->model);
512 g_free(hw_info->serial_number);
513 g_free(hw_info->firmware_version);