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 sr_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)) {
63 } else if (!g_strcmp0(str, "0") ||
64 !g_ascii_strncasecmp(str, "n", 1) ||
65 !g_ascii_strncasecmp(str, "f", 1) ||
66 !g_ascii_strncasecmp(str, "no", 2) ||
67 !g_ascii_strncasecmp(str, "false", 5) ||
68 !g_ascii_strncasecmp(str, "off", 3)) {
78 * Send a SCPI command.
80 * @param serial Previously initialized serial port structure.
81 * @param command The SCPI command to send to the device.
83 * @return SR_OK on success, SR_ERR on failure.
85 SR_PRIV int sr_scpi_send(struct sr_serial_dev_inst *serial,
90 gchar *terminated_command;
92 terminated_command = g_strconcat(command, "\n", NULL);
93 len = strlen(terminated_command);
95 out = serial_write(serial, terminated_command,
96 strlen(terminated_command));
98 g_free(terminated_command);
101 sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out,
106 sr_spew("Successfully sent SCPI command: '%s'.", command);
112 * Send a SCPI command, receive the reply and store the reply in scpi_response.
114 * @param serial Previously initialized serial port structure.
115 * @param command The SCPI command to send to the device (can be NULL).
116 * @param scpi_response Pointer where to store the scpi response.
118 * @return SR_OK upon fetching a full SCPI response, SR_ERR upon fetching a
119 * incomplete or no response. The allocated response must be freed by the caller
120 * in the case of a full response as well in the case of an incomplete.
122 SR_PRIV int sr_scpi_get_string(struct sr_serial_dev_inst *serial,
123 const char *command, char **scpi_response)
132 if (sr_scpi_send(serial, command) != SR_OK)
135 response = g_string_sized_new(1024);
137 for (i = 0; i <= SCPI_READ_RETRIES; i++) {
138 while ((len = serial_read(serial, buf, sizeof(buf))) > 0)
139 response = g_string_append_len(response, buf, len);
141 if (response->len > 0 &&
142 response->str[response->len-1] == '\n') {
143 sr_spew("Fetched full SCPI response");
147 g_usleep(SCPI_READ_RETRY_TIMEOUT);
150 if (response->len == 0) {
151 sr_dbg("No SCPI response received");
152 g_string_free(response, TRUE);
153 *scpi_response = NULL;
156 } else if (response->str[response->len-1] == '\n') {
158 * The SCPI response contains a LF ('\n') at the end and we
159 * don't need this so replace it with a '\0' and decrement
162 response->str[--response->len] = '\0';
166 sr_warn("Incomplete SCPI response received!");
170 /* Minor optimization: steal the string instead of copying. */
171 *scpi_response = response->str;
173 /* A SCPI response can be quite large, print at most 50 characters */
174 sr_dbg("SCPI response for command %s received (length %d): '%.50s'",
175 command, response->len, response->str);
177 g_string_free(response, FALSE);
183 * Send a SCPI command, read the reply, parse it as a bool value and store the
184 * result in scpi_response.
186 * @param serial Previously initialized serial port structure.
187 * @param command The SCPI command to send to the device (can be NULL).
188 * @param scpi_response Pointer where to store the parsed result.
190 * @return SR_OK on success, SR_ERR on failure.
192 SR_PRIV int sr_scpi_get_bool(struct sr_serial_dev_inst *serial,
193 const char *command, gboolean *scpi_response)
200 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
204 if (sr_parse_strict_bool(response, scpi_response) == SR_OK)
215 * Send a SCPI command, read the reply, parse it as an integer and store the
216 * result in scpi_response.
218 * @param serial Previously initialized serial port structure.
219 * @param command The SCPI command to send to the device (can be NULL).
220 * @param scpi_response Pointer where to store the parsed result.
222 * @return SR_OK on success, SR_ERR on failure.
224 SR_PRIV int sr_scpi_get_int(struct sr_serial_dev_inst *serial,
225 const char *command, int *scpi_response)
232 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
236 if (sr_atoi(response, scpi_response) == SR_OK)
247 * Send a SCPI command, read the reply, parse it as a float and store the
248 * result in scpi_response.
250 * @param serial Previously initialized serial port structure.
251 * @param command The SCPI command to send to the device (can be NULL).
252 * @param scpi_response Pointer where to store the parsed result.
254 * @return SR_OK on success, SR_ERR on failure.
256 SR_PRIV int sr_scpi_get_float(struct sr_serial_dev_inst *serial,
257 const char *command, float *scpi_response)
264 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
268 if (sr_atof(response, scpi_response) == SR_OK)
279 * Send a SCPI command, read the reply, parse it as a double and store the
280 * result in scpi_response.
282 * @param serial Previously initialized serial port structure.
283 * @param command The SCPI command to send to the device (can be NULL).
284 * @param scpi_response Pointer where to store the parsed result.
286 * @return SR_OK on success, SR_ERR on failure.
288 SR_PRIV int sr_scpi_get_double(struct sr_serial_dev_inst *serial,
289 const char *command, double *scpi_response)
296 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
300 if (sr_atod(response, scpi_response) == SR_OK)
311 * Send a SCPI *OPC? command, read the reply and return the result of the
314 * @param serial Previously initialized serial port structure.
316 * @return SR_OK on success, SR_ERR on failure.
318 SR_PRIV int sr_scpi_get_opc(struct sr_serial_dev_inst *serial)
323 for (i = 0; i < SCPI_READ_RETRIES; ++i) {
324 sr_scpi_get_bool(serial, SCPI_CMD_OPC, &opc);
329 g_usleep(SCPI_READ_RETRY_TIMEOUT);
336 * Send a SCPI command, read the reply, parse it as comma separated list of
337 * floats and store the as an result in scpi_response.
339 * @param serial Previously initialized serial port structure.
340 * @param command The SCPI command to send to the device (can be NULL).
341 * @param scpi_response Pointer where to store the parsed result.
343 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
344 * error or upon no response. The allocated response must be freed by the caller
345 * in the case of an SR_OK as well as in the case of parsing error.
347 SR_PRIV int sr_scpi_get_floatv(struct sr_serial_dev_inst *serial,
348 const char *command, GArray **scpi_response)
356 GArray *response_array;
362 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
366 tokens = g_strsplit(response, ",", 0);
369 response_array = g_array_sized_new(TRUE, FALSE, sizeof(float), 256);
372 if (sr_atof(*ptr, &tmp) == SR_OK)
373 response_array = g_array_append_val(response_array,
383 if (ret == SR_ERR && response_array->len == 0) {
384 g_array_free(response_array, TRUE);
385 *scpi_response = NULL;
389 *scpi_response = response_array;
395 * Send a SCPI command, read the reply, parse it as comma separated list of
396 * unsigned 8 bit integers and store the as an result in scpi_response.
398 * @param serial Previously initialized serial port structure.
399 * @param command The SCPI command to send to the device (can be NULL).
400 * @param scpi_response Pointer where to store the parsed result.
402 * @return SR_OK upon successfully parsing all values, SR_ERR upon a parsing
403 * error or upon no response. The allocated response must be freed by the caller
404 * in the case of an SR_OK as well as in the case of parsing error.
406 SR_PRIV int sr_scpi_get_uint8v(struct sr_serial_dev_inst *serial,
407 const char *command, GArray **scpi_response)
415 GArray *response_array;
421 if (sr_scpi_get_string(serial, command, &response) != SR_OK)
425 tokens = g_strsplit(response, ",", 0);
428 response_array = g_array_sized_new(TRUE, FALSE, sizeof(uint8_t), 256);
431 if (sr_atoi(*ptr, &tmp) == SR_OK)
432 response_array = g_array_append_val(response_array,
442 if (response_array->len == 0) {
443 g_array_free(response_array, TRUE);
444 *scpi_response = NULL;
448 *scpi_response = response_array;
454 * Send the *IDN? SCPI command, receive the reply, parse it and store the
455 * reply as a sr_scpi_hw_info structure in the supplied scpi_response pointer.
457 * @param serial Previously initialized serial port structure.
458 * @param scpi_response Pointer where to store the hw_info structure.
460 * @return SR_OK upon success, SR_ERR on failure.
461 * The hw_info structure must be freed by the caller with sr_scpi_hw_info_free().
463 SR_PRIV int sr_scpi_get_hw_id(struct sr_serial_dev_inst *serial,
464 struct sr_scpi_hw_info **scpi_response)
470 struct sr_scpi_hw_info *hw_info;
475 if (sr_scpi_get_string(serial, SCPI_CMD_IDN, &response) != SR_OK)
480 * The response to a '*IDN?' is specified by the SCPI spec. It contains
481 * a comma-separated list containing the manufacturer name, instrument
482 * model, serial number of the instrument and the firmware version.
484 tokens = g_strsplit(response, ",", 0);
486 for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
488 if (num_tokens != 4) {
489 sr_dbg("IDN response not according to spec: %80.s", response);
496 hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info));
499 return SR_ERR_MALLOC;
502 hw_info->manufacturer = g_strdup(tokens[0]);
503 hw_info->model = g_strdup(tokens[1]);
504 hw_info->serial_number = g_strdup(tokens[2]);
505 hw_info->firmware_version = g_strdup(tokens[3]);
509 *scpi_response = hw_info;
515 * Free a sr_scpi_hw_info struct.
517 * @param hw_info Pointer to the struct to free.
519 * This function is safe to call with a NULL pointer.
521 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info)
524 g_free(hw_info->manufacturer);
525 g_free(hw_info->model);
526 g_free(hw_info->serial_number);
527 g_free(hw_info->firmware_version);