2 * This file is part of the libsigrok project.
4 * Copyright (C) 2015-2016 Uwe Hermann <uwe@hermann-uwe.de>
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 2 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/>.
24 #define READ_TIMEOUT_MS 1000
26 static int send_cmd(const struct sr_dev_inst *sdi, const char *cmd,
27 char *replybuf, int replybufsize)
31 struct sr_serial_dev_inst *serial;
35 /* Send the command (blocking, with timeout). */
36 if ((ret = serial_write_blocking(serial, cmd,
37 strlen(cmd), serial_timeout(serial,
38 strlen(cmd)))) < (int)strlen(cmd)) {
39 sr_err("Unable to send command.");
43 /* Read the reply (blocking, with timeout). */
44 memset(replybuf, 0, replybufsize);
47 ret = serial_readline(serial, &bufptr, &len, READ_TIMEOUT_MS);
49 /* If we got 0 characters (possibly one \r or \n), retry once. */
52 ret = serial_readline(serial, &bufptr, &len, READ_TIMEOUT_MS);
55 if (g_str_has_prefix((const char *)&bufptr, "err ")) {
56 sr_err("Device replied with an error: '%s'.", bufptr);
63 SR_PRIV int reloadpro_set_current_limit(const struct sr_dev_inst *sdi,
70 if (current < 0 || current > 6) {
71 sr_err("The current limit must be 0-6 A (was %f A).", current);
75 /* Hardware expects current in mA, integer (0..6000). */
76 ma = (int)(current * 1000);
78 sr_err("Setting current limit to %f A (%d mA).", current, ma);
80 cmd = g_strdup_printf("set %d\n", ma);
81 if ((ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf))) < 0) {
82 sr_err("Error sending current limit command: %d.", ret);
91 SR_PRIV int reloadpro_set_on_off(const struct sr_dev_inst *sdi, gboolean on)
97 cmd = (on) ? "on\n" : "off\n";
98 if ((ret = send_cmd(sdi, cmd, (char *)&buf, sizeof(buf))) < 0) {
99 sr_err("Error sending on/off command: %d.", ret);
106 SR_PRIV int reloadpro_get_current_limit(const struct sr_dev_inst *sdi,
112 if ((ret = send_cmd(sdi, "set\n", (char *)&buf, sizeof(buf))) < 0) {
113 sr_err("Error sending current limit query: %d.", ret);
117 /* Hardware sends current in mA, integer (0..6000). */
118 *current = g_ascii_strtod(buf + 4, NULL) / 1000;
123 SR_PRIV int reloadpro_get_voltage_current(const struct sr_dev_inst *sdi,
124 float *voltage, float *current)
130 if ((ret = send_cmd(sdi, "read\n", (char *)&buf, sizeof(buf))) < 0) {
131 sr_err("Error sending voltage/current query: %d.", ret);
135 /* Reply: "read <current> <voltage>". */
136 tokens = g_strsplit((const char *)&buf, " ", 3);
138 *voltage = g_ascii_strtod(tokens[2], NULL) / 1000;
140 *current = g_ascii_strtod(tokens[1], NULL) / 1000;
146 static int send_config_update_key(const struct sr_dev_inst *sdi,
147 uint32_t key, GVariant *var)
149 struct sr_config *cfg;
150 struct sr_datafeed_packet packet;
151 struct sr_datafeed_meta meta;
154 cfg = sr_config_new(key, var);
158 memset(&meta, 0, sizeof(meta));
160 packet.type = SR_DF_META;
161 packet.payload = &meta;
163 meta.config = g_slist_append(meta.config, cfg);
165 ret = sr_session_send(sdi, &packet);
171 static void handle_packet(const struct sr_dev_inst *sdi)
173 float voltage, current;
174 struct sr_datafeed_packet packet;
175 struct sr_datafeed_analog analog;
176 struct sr_analog_encoding encoding;
177 struct sr_analog_meaning meaning;
178 struct sr_analog_spec spec;
179 struct dev_context *devc;
185 if (g_str_has_prefix((const char *)devc->buf, "overtemp")) {
186 sr_warn("Overtemperature condition!");
187 devc->otp_active = TRUE;
188 send_config_update_key(sdi, SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE,
189 g_variant_new_boolean(TRUE));
193 if (g_str_has_prefix((const char *)devc->buf, "undervolt")) {
194 sr_warn("Undervoltage condition!");
195 devc->uvc_active = TRUE;
196 send_config_update_key(sdi, SR_CONF_UNDER_VOLTAGE_CONDITION_ACTIVE,
197 g_variant_new_boolean(TRUE));
201 if (g_str_has_prefix((const char *)devc->buf, "err ")) {
202 sr_err("Device replied with an error: '%s'.", devc->buf);
206 if (g_str_has_prefix((const char *)devc->buf, "set ")) {
207 tokens = g_strsplit((const char *)devc->buf, " ", 2);
208 current = g_ascii_strtod(tokens[1], NULL) / 1000;
210 send_config_update_key(sdi, SR_CONF_CURRENT_LIMIT,
211 g_variant_new_double(current));
215 if (!g_str_has_prefix((const char *)devc->buf, "read ")) {
216 sr_dbg("Unknown packet: '%s'.", devc->buf);
220 tokens = g_strsplit((const char *)devc->buf, " ", 3);
221 voltage = g_ascii_strtod(tokens[2], NULL) / 1000;
222 current = g_ascii_strtod(tokens[1], NULL) / 1000;
226 packet.type = SR_DF_FRAME_BEGIN;
227 packet.payload = NULL;
228 sr_session_send(sdi, &packet);
230 sr_analog_init(&analog, &encoding, &meaning, &spec, 4);
232 packet.type = SR_DF_ANALOG;
233 packet.payload = &analog;
234 analog.num_samples = 1;
237 l = g_slist_copy(sdi->channels);
238 l = g_slist_remove_link(l, g_slist_nth(l, 1));
239 meaning.channels = l;
240 meaning.mq = SR_MQ_VOLTAGE;
241 meaning.mqflags = SR_MQFLAG_DC;
242 meaning.unit = SR_UNIT_VOLT;
243 analog.data = &voltage;
244 sr_session_send(sdi, &packet);
248 l = g_slist_copy(sdi->channels);
249 l = g_slist_remove_link(l, g_slist_nth(l, 0));
250 meaning.channels = l;
251 meaning.mq = SR_MQ_CURRENT;
252 meaning.mqflags = SR_MQFLAG_DC;
253 meaning.unit = SR_UNIT_AMPERE;
254 analog.data = ¤t;
255 sr_session_send(sdi, &packet);
259 packet.type = SR_DF_FRAME_END;
260 packet.payload = NULL;
261 sr_session_send(sdi, &packet);
263 sr_sw_limits_update_samples_read(&devc->limits, 1);
266 static void handle_new_data(const struct sr_dev_inst *sdi)
269 struct dev_context *devc;
270 struct sr_serial_dev_inst *serial;
275 /* Try to get as much data as the buffer can hold. */
276 len = RELOADPRO_BUFSIZE - devc->buflen;
277 len = serial_read_nonblocking(serial, devc->buf + devc->buflen, len);
279 return; /* No new bytes, nothing to do. */
281 sr_err("Serial port read error: %d.", len);
286 if (g_str_has_suffix((const char *)devc->buf, "\n")) {
288 memset(devc->buf, 0, RELOADPRO_BUFSIZE);
293 SR_PRIV int reloadpro_receive_data(int fd, int revents, void *cb_data)
295 struct sr_dev_inst *sdi;
296 struct dev_context *devc;
303 if (revents != G_IO_IN)
306 handle_new_data(sdi);
308 if (sr_sw_limits_check(&devc->limits))
309 sr_dev_acquisition_stop(sdi);