2 * This file is part of the libsigrok project.
4 * Copyright (C) 2015 Hannu Vuolasaho <vuokkosetae@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/>.
23 #define REQ_TIMEOUT_MS 500
24 #define DEVICE_PROCESSING_TIME_MS 80
26 SR_PRIV int korad_kdxxxxp_send_cmd(struct sr_serial_dev_inst *serial,
31 sr_dbg("Sending '%s'.", cmd);
32 if ((ret = serial_write_blocking(serial, cmd, strlen(cmd), 0)) < 0) {
33 sr_err("Error sending command: %d.", ret);
40 SR_PRIV int korad_kdxxxxp_read_chars(struct sr_serial_dev_inst *serial,
43 int ret, received, turns;
49 if ((ret = serial_read_blocking(serial, buf + received,
51 serial_timeout(serial, count))) < 0) {
52 sr_err("Error %d reading %d bytes from device.",
58 } while ((received < count) && (turns < 100));
62 sr_spew("Received: '%s'.", buf);
67 static void give_device_time_to_process(struct dev_context *devc)
69 int64_t sleeping_time;
71 sleeping_time = devc->req_sent_at + (DEVICE_PROCESSING_TIME_MS * 1000);
72 sleeping_time -= g_get_monotonic_time();
74 if (sleeping_time > 0) {
75 g_usleep(sleeping_time);
76 sr_spew("Sleeping for processing %" PRIi64 " usec", sleeping_time);
80 SR_PRIV int korad_kdxxxxp_set_value(struct sr_serial_dev_inst *serial,
81 struct dev_context *devc)
87 give_device_time_to_process(devc);
94 sr_err("Can't set measurable parameter.");
96 case KDXXXXP_CURRENT_MAX:
98 value = devc->current_max;
100 case KDXXXXP_VOLTAGE_MAX:
101 cmd = "VSET1:%05.2f";
102 value = devc->voltage_max;
106 value = (devc->output_enabled) ? 1 : 0;
110 value = (devc->beep_enabled) ? 1 : 0;
114 value = (devc->ocp_enabled) ? 1 : 0;
118 value = (devc->ovp_enabled) ? 1 : 0;
122 if (devc->program < 1 || devc->program > 5) {
123 sr_err("Only programs 1-5 supported and %d isn't "
124 "between them.", devc->program);
127 value = devc->program;
131 if (devc->program < 1 || devc->program > 5) {
132 sr_err("Only programs 1-5 supported and %d isn't "
133 "between them.", devc->program);
136 value = devc->program;
139 sr_err("Don't know how to set %d.", devc->target);
144 snprintf(msg, 20, cmd, value);
146 ret = korad_kdxxxxp_send_cmd(serial, msg);
147 devc->req_sent_at = g_get_monotonic_time();
148 devc->reply_pending = FALSE;
153 SR_PRIV int korad_kdxxxxp_query_value(struct sr_serial_dev_inst *serial,
154 struct dev_context *devc)
158 give_device_time_to_process(devc);
160 switch(devc->target){
161 case KDXXXXP_CURRENT:
162 /* Read current from device. */
163 ret = korad_kdxxxxp_send_cmd(serial, "IOUT1?");
165 case KDXXXXP_CURRENT_MAX:
166 /* Read set current from device. */
167 ret = korad_kdxxxxp_send_cmd(serial, "ISET1?");
169 case KDXXXXP_VOLTAGE:
170 /* Read voltage from device. */
171 ret = korad_kdxxxxp_send_cmd(serial, "VOUT1?");
173 case KDXXXXP_VOLTAGE_MAX:
174 /* Read set voltage from device. */
175 ret = korad_kdxxxxp_send_cmd(serial, "VSET1?");
179 /* Read status from device. */
180 ret = korad_kdxxxxp_send_cmd(serial, "STATUS?");
183 sr_err("Don't know how to query %d.", devc->target);
187 devc->req_sent_at = g_get_monotonic_time();
188 devc->reply_pending = TRUE;
193 SR_PRIV int korad_kdxxxxp_get_all_values(struct sr_serial_dev_inst *serial,
194 struct dev_context *devc)
198 for (devc->target = KDXXXXP_CURRENT;
199 devc->target <= KDXXXXP_STATUS; devc->target++) {
200 if ((ret = korad_kdxxxxp_query_value(serial, devc)) < 0)
202 if ((ret = korad_kdxxxxp_get_reply(serial, devc)) < 0)
209 SR_PRIV int korad_kdxxxxp_get_reply(struct sr_serial_dev_inst *serial,
210 struct dev_context *devc)
220 switch (devc->target) {
221 case KDXXXXP_CURRENT:
222 /* Read current from device. */
223 target = &(devc->current);
225 case KDXXXXP_CURRENT_MAX:
226 /* Read set current from device. */
227 target = &(devc->current_max);
229 case KDXXXXP_VOLTAGE:
230 /* Read voltage from device. */
231 target = &(devc->voltage);
233 case KDXXXXP_VOLTAGE_MAX:
234 /* Read set voltage from device. */
235 target = &(devc->voltage_max);
239 /* Read status from device. */
243 sr_err("Don't know where to put repply %d.", devc->target);
246 if ((ret = korad_kdxxxxp_read_chars(serial, count, devc->reply)) < 0)
249 devc->reply[count] = 0;
252 /* Handle the strange 'M'. */
253 if (devc->reply[0] == 'M') {
254 for (i = 1; i < count; i++)
255 devc->reply[i - 1] = devc->reply[i];
256 /* Get the last character. */
257 if ((i = korad_kdxxxxp_read_chars(serial, 1,
258 &(devc->reply[count]))) < 0)
261 value = g_ascii_strtod(devc->reply, NULL);
262 *target = (float)value;
263 sr_dbg("value: %f",value);
265 /* We have status reply. */
266 status_byte = devc->reply[0];
267 /* Constant current */
268 devc->cc_mode[0] = !(status_byte & (1 << 0)); /* Channel one */
269 devc->cc_mode[1] = !(status_byte & (1 << 1)); /* Channel two */
272 * status_byte & ((1 << 2) | (1 << 3))
273 * 00 independent 01 series 11 parallel
275 devc->beep_enabled = (1 << 4);
276 devc->ocp_enabled = (status_byte & (1 << 5));
277 devc->output_enabled = (status_byte & (1 << 6));
278 /* Velleman LABPS3005 quirk */
279 if (devc->output_enabled)
280 devc->ovp_enabled = (status_byte & (1 << 7));
281 sr_dbg("Status: 0x%02x", status_byte);
282 sr_spew("Status: CH1: constant %s CH2: constant %s. "
283 "Tracking would be %s. Device is "
284 "%s and %s. Buttons are %s. Output is %s "
285 "and extra byte is %s.",
286 (status_byte & (1 << 0)) ? "voltage" : "current",
287 (status_byte & (1 << 1)) ? "voltage" : "current",
288 (status_byte & (1 << 2)) ? "parallel" : "series",
289 (status_byte & (1 << 3)) ? "tracking" : "independent",
290 (status_byte & (1 << 4)) ? "beeping" : "silent",
291 (status_byte & (1 << 5)) ? "locked" : "unlocked",
292 (status_byte & (1 << 6)) ? "enabled" : "disabled",
293 (status_byte & (1 << 7)) ? "true" : "false");
296 devc->reply_pending = FALSE;
301 static void next_measurement(struct dev_context *devc)
303 switch (devc->target) {
304 case KDXXXXP_CURRENT:
305 devc->target = KDXXXXP_VOLTAGE;
307 case KDXXXXP_CURRENT_MAX:
308 devc->target = KDXXXXP_CURRENT;
310 case KDXXXXP_VOLTAGE:
311 devc->target = KDXXXXP_STATUS;
313 case KDXXXXP_VOLTAGE_MAX:
314 devc->target = KDXXXXP_CURRENT;
316 /* Read back what was set. */
321 devc->target = KDXXXXP_STATUS;
324 devc->target = KDXXXXP_CURRENT;
327 devc->target = KDXXXXP_CURRENT;
331 SR_PRIV int korad_kdxxxxp_receive_data(int fd, int revents, void *cb_data)
333 struct sr_dev_inst *sdi;
334 struct dev_context *devc;
335 struct sr_serial_dev_inst *serial;
336 struct sr_datafeed_packet packet;
337 struct sr_datafeed_analog_old analog;
338 int64_t t, elapsed_us;
342 if (!(sdi = cb_data))
345 if (!(devc = sdi->priv))
350 if (revents == G_IO_IN) {
352 korad_kdxxxxp_get_reply(serial, devc);
354 /* Send the value forward. */
355 packet.type = SR_DF_ANALOG_OLD;
356 packet.payload = &analog;
357 analog.channels = sdi->channels;
358 analog.num_samples = 1;
359 if (devc->target == KDXXXXP_CURRENT) {
360 analog.mq = SR_MQ_CURRENT;
361 analog.unit = SR_UNIT_AMPERE;
363 analog.data = &devc->current;
364 sr_session_send(sdi, &packet);
366 if (devc->target == KDXXXXP_VOLTAGE) {
367 analog.mq = SR_MQ_VOLTAGE;
368 analog.unit = SR_UNIT_VOLT;
369 analog.mqflags = SR_MQFLAG_DC;
370 analog.data = &devc->voltage;
371 sr_session_send(sdi, &packet);
374 next_measurement(devc);
377 if (!devc->reply_pending) {
378 if (korad_kdxxxxp_query_value(serial, devc) < 0)
380 devc->req_sent_at = g_get_monotonic_time();
381 devc->reply_pending = TRUE;
385 if (devc->limit_samples && (devc->num_samples >= devc->limit_samples)) {
386 sr_info("Requested number of samples reached.");
387 sdi->driver->dev_acquisition_stop(sdi, cb_data);
391 if (devc->limit_msec) {
392 t = (g_get_monotonic_time() - devc->starttime) / 1000;
393 if (t > (int64_t)devc->limit_msec) {
394 sr_info("Requested time limit reached.");
395 sdi->driver->dev_acquisition_stop(sdi, cb_data);
400 /* Request next packet, if required. */
401 if (sdi->status == SR_ST_ACTIVE) {
402 if (devc->reply_pending) {
403 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
404 if (elapsed_us > (REQ_TIMEOUT_MS * 1000))
405 devc->reply_pending = FALSE;