src/hardware/motech-lps-30x/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
   5  * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> (code from atten-pps3xxx)
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <ctype.h>
  23 #include <math.h>
  24 #include <string.h>
  25 #include "protocol.h"
  26
  27 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen);
  28 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char *fmt, va_list args);
  29 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char *fmt, ...);
  30 SR_PRIV int lps_cmd_reply(char *reply, struct sr_serial_dev_inst *serial, const char *fmt, ...);
  31 SR_PRIV int lps_query_status(struct sr_dev_inst *sdi);
  32
  33 #define SERIALCOMM "2400/8n1/dtr=1/rts=1/flow=0"
  34
  35 static const uint32_t scanopts[] = {
  36         SR_CONF_CONN,
  37         SR_CONF_SERIALCOMM,
  38 };
  39
  40 static const uint32_t drvopts[] = {
  41         SR_CONF_POWER_SUPPLY,
  42 };
  43
  44 static const uint32_t devopts[] = {
  45         SR_CONF_CONTINUOUS,
  46         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  47         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  48         SR_CONF_CHANNEL_CONFIG | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  49 };
  50
  51 /** Hardware capabilities channel 1, 2. */
  52 static const uint32_t devopts_cg_ch12[] = {
  53         SR_CONF_VOLTAGE | SR_CONF_GET,
  54         SR_CONF_VOLTAGE_TARGET | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  55         SR_CONF_CURRENT | SR_CONF_GET,
  56         SR_CONF_CURRENT_LIMIT | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  57         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  58 };
  59
  60 /** Hardware capabilities channel 3 (LPS-304/305 only). */
  61 static const uint32_t devopts_cg_ch3[] = {
  62         SR_CONF_VOLTAGE | SR_CONF_GET,
  63         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  64 };
  65
  66 static const char *channel_modes[] = {
  67         "Independent",
  68         "Track1",
  69         "Track2",
  70 };
  71
  72 static const struct lps_modelspec models[] = {
  73         { LPS_UNKNOWN, "Dummy", 0,
  74                 {
  75
  76                 }
  77         },
  78         { LPS_301, "LPS-301", 1,
  79                 {
  80                         /* Channel 1 */
  81                         { { 0, 32, 0.01 }, { 0.005, 2, 0.001 } },
  82                 },
  83         },
  84         { LPS_302, "LPS-302", 1,
  85                 {
  86                         /* Channel 1 */
  87                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
  88                 },
  89         },
  90         { LPS_303, "LPS-303", 1,
  91                 {
  92                         /* Channel 1 */
  93                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
  94                 },
  95         },
  96         { LPS_304, "LPS-304", 3,
  97                 {
  98                         /* Channel 1 */
  99                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 100                         /* Channel 2 */
 101                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 102                         /* Channel 3 */
 103                         { { 5, 5, 0.0 }, { 0.005, 3, 0.001 } },
 104                 },
 105         },
 106         { LPS_305, "LPS-305", 3,
 107                 {
 108                         /* Channel 1 */
 109                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 110                         /* Channel 2 */
 111                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 112                         /* Channel 3 */
 113                         { { 3.3, 5, 1.7 }, { 0.005, 3, 0.001 } },
 114                 },
 115         },
 116 };
 117
 118 /** Send command to device with va_list. */
 119 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char *fmt, va_list args)
 120 {
 121         int retc;
 122         char auxfmt[LINELEN_MAX];
 123         char buf[LINELEN_MAX];
 124
 125         snprintf(auxfmt, sizeof(auxfmt), "%s\r\n", fmt);
 126         vsnprintf(buf, sizeof(buf), auxfmt, args);
 127
 128         sr_spew("lps_send_va: \"%s\"", buf);
 129
 130         retc = serial_write_blocking(serial, buf, strlen(buf),
 131                         serial_timeout(serial, strlen(buf)));
 132
 133         if (retc < 0)
 134                 return SR_ERR;
 135
 136         return SR_OK;
 137 }
 138
 139 /** Send command to device. */
 140 SR_PRIV int lps_send_req(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 141 {
 142         int retc;
 143         va_list args;
 144
 145         va_start(args, fmt);
 146         retc = lps_send_va(serial, fmt, args);
 147         va_end(args);
 148
 149         return retc;
 150 }
 151
 152 /** Send command and consume simple OK reply. */
 153 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 154 {
 155         int retc;
 156         va_list args;
 157         char buf[LINELEN_MAX];
 158         char *bufptr;
 159         int buflen;
 160
 161         /* Send command */
 162         va_start(args, fmt);
 163         retc = lps_send_va(serial, fmt, args);
 164         va_end(args);
 165
 166         if (retc != SR_OK)
 167                 return SR_ERR;
 168
 169         /* Read reply */
 170         buf[0] = '\0';
 171         bufptr = buf;
 172         buflen = sizeof(buf);
 173         retc = lps_read_reply(serial, &bufptr, &buflen);
 174         if ((retc == SR_OK) && (buflen == 0))
 175                 return SR_OK;
 176
 177         return SR_ERR;
 178 }
 179
 180 /**
 181  * Send command and read reply string.
 182  * @param reply Pointer to buffer of size LINELEN_MAX. Will be NUL-terminated.
 183  */
 184 SR_PRIV int lps_cmd_reply(char *reply, struct sr_serial_dev_inst *serial, const char *fmt, ...)
 185 {
 186         int retc;
 187         va_list args;
 188         char buf[LINELEN_MAX];
 189         char *bufptr;
 190         int buflen;
 191
 192         reply[0] = '\0';
 193
 194         /* Send command */
 195         va_start(args, fmt);
 196         retc = lps_send_va(serial, fmt, args);
 197         va_end(args);
 198
 199         if (retc != SR_OK)
 200                 return SR_ERR;
 201
 202         /* Read reply */
 203         buf[0] = '\0';
 204         bufptr = buf;
 205         buflen = sizeof(buf);
 206         retc = lps_read_reply(serial, &bufptr, &buflen);
 207         if ((retc == SR_OK) && (buflen > 0)) {
 208                 strcpy(reply, buf);
 209                 return SR_OK;
 210         }
 211
 212         return SR_ERR;
 213 }
 214
 215 /** Process integer value returned by STATUS command. */
 216 SR_PRIV int lps_process_status(struct sr_dev_inst *sdi, int stat)
 217 {
 218         struct dev_context *devc;
 219         int tracking_mode;
 220
 221         devc = sdi->priv;
 222
 223         sr_spew("Status: %d", stat);
 224         devc->channel_status[0].cc_mode = (stat & 0x01) != 0;
 225         sr_spew("Channel 1 %s mode", devc->channel_status[0].cc_mode?"CC":"CV");
 226         if (devc->model->num_channels > 1) {
 227                 devc->channel_status[1].cc_mode = (stat & 0x02) != 0;
 228                 sr_spew("Channel 2 %s mode", devc->channel_status[1].cc_mode?"CC":"CV");
 229
 230                 tracking_mode = (stat & 0x0c) >> 2;
 231                 switch (tracking_mode) {
 232                 case 0: devc->tracking_mode = 0;
 233                         break;
 234                 case 2: devc->tracking_mode = 1;
 235                         break;
 236                 case 3: devc->tracking_mode = 2;
 237                         break;
 238                 default:
 239                         sr_err("Illegal channel tracking mode %d!", tracking_mode);
 240                         devc->tracking_mode = 0;
 241                         break;
 242                 }
 243
 244                 sr_spew("Channel tracking: %d", devc->tracking_mode);
 245         }
 246         devc->channel_status[0].output_enabled = devc->channel_status[1].output_enabled = stat&0x040?TRUE:FALSE;
 247         sr_spew("Channel 1%s output: %s", devc->model->num_channels > 1?"+2":"", devc->channel_status[0].output_enabled?"ON":"OFF");
 248         if (devc->model->num_channels > 2) {
 249                 devc->channel_status[2].output_enabled = stat&0x010?TRUE:FALSE;
 250                 devc->channel_status[2].output_voltage_last = stat&0x020?3.3:5;
 251                 sr_spew("Channel 3 output: %s, U=%02f V, overload=%d",
 252                         devc->channel_status[2].output_enabled?"ON":"OFF",
 253                         devc->channel_status[2].output_voltage_last,
 254                         stat&0x080?1:0);
 255         }
 256         sr_spew("Fan=%d, beep=%d, CC output compensated=%d", stat&0x0100?1:0, stat&0x0200?1:0, stat&0x0400?1:0);
 257
 258         return SR_OK;
 259 }
 260
 261 /** Send STATUS commend and process status string. */
 262 SR_PRIV int lps_query_status(struct sr_dev_inst *sdi)
 263 {
 264         char buf[LINELEN_MAX];
 265         int stat, ret;
 266         struct dev_context *devc;
 267
 268         devc = sdi->priv;
 269
 270         devc->req_sent_at = g_get_real_time();
 271
 272         if ((ret = lps_cmd_reply(buf, sdi->conn, "STATUS")) < 0) {
 273                 sr_err("%s: Failed to read status: %s.", __func__,
 274                         sr_strerror(ret));
 275                 return SR_ERR;
 276         }
 277
 278         if (sr_atoi(buf, &stat) != SR_OK)
 279                 return SR_ERR;
 280
 281         return lps_process_status(sdi, stat);
 282 }
 283
 284 static gint64 calc_timeout_ms(gint64 start_us)
 285 {
 286         gint64 result = REQ_TIMEOUT_MS - ((g_get_real_time() - start_us) / 1000);
 287
 288         if (result < 0)
 289                 return 0;
 290
 291         return result;
 292 }
 293
 294 /**
 295  * Read message into buf until "OK" received.
 296  *
 297  * @retval SR_OK Msg received; buf and buflen contain result, if any except OK.
 298  * @retval SR_ERR Error, including timeout.
 299 */
 300 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen)
 301 {
 302         int retries;
 303         char buf2[LINELEN_MAX];
 304         char *buf2ptr;
 305         int buf2len;
 306         gint64 timeout_start;
 307
 308         *buf[0] = '\0';
 309
 310         /* Read one line. It is either a data message or "OK". */
 311         timeout_start = g_get_real_time();
 312         buf2len = *buflen;
 313         /* Up to 5 tries because serial_readline() will consume only one CR or LF per
 314          * call, but device sends up to 4 in a row. */
 315         for (retries = 0; retries < 5; retries++) {
 316                 *buflen = buf2len;
 317                 if (serial_readline(serial, buf, buflen, calc_timeout_ms(timeout_start)) != SR_OK)
 318                         return SR_ERR;
 319                 if (!strcmp(*buf, "OK")) { /* We got an OK! */
 320                         *buf[0] = '\0';
 321                         *buflen = 0;
 322                         return SR_OK;
 323                 }
 324                 if (*buflen > 0) /* We got a msg! */
 325                         break;
 326         }
 327
 328         /* A data msg is in buf (possibly ERROR), need to consume "OK". */
 329         buf2[0] = '\0';
 330         buf2ptr = buf2;
 331         for (retries = 0; retries < 5; retries++) {
 332                 buf2len = sizeof(buf2);
 333                 if (serial_readline(serial, &buf2ptr, &buf2len, calc_timeout_ms(timeout_start)) != SR_OK)
 334                         return SR_ERR;
 335
 336                 if (!strcmp(buf2ptr, "OK")) { /* We got an OK! */
 337                         if (!strcmp(*buf, "ERROR")) { /* OK came after msg ERROR! */
 338                                 sr_spew("ERROR found!");
 339                                 *buf[0] = '\0';
 340                                 *buflen = 0;
 341                                 return SR_ERR;
 342                         }
 343                         return SR_OK;
 344                 }
 345         }
 346
 347         return SR_ERR; /* Timeout! */
 348 }
 349
 350 /** Scan for LPS-300 series device. */
 351 static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *options)
 352 {
 353         struct sr_dev_inst *sdi;
 354         struct dev_context *devc;
 355         struct sr_serial_dev_inst *serial;
 356         struct sr_channel *ch;
 357         struct sr_channel_group *cg;
 358         const char *conn, *serialcomm;
 359         int cnt, ret;
 360         gchar buf[LINELEN_MAX];
 361         gchar channel[10];
 362         char *verstr;
 363
 364         sdi = NULL;
 365         devc = NULL;
 366
 367         /* Process and check options. */
 368         conn = NULL;
 369         serialcomm = SERIALCOMM;
 370         if (sr_serial_extract_options(options, &conn, &serialcomm) != SR_OK)
 371                 return NULL;
 372
 373         /* Init serial port. */
 374         serial = sr_serial_dev_inst_new(conn, serialcomm);
 375
 376         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 377                 goto exit_err;
 378
 379         /* Query and verify model string. */
 380         if (lps_cmd_reply(buf, serial, "MODEL") != SR_OK)
 381                 return NULL;
 382
 383         /* Check model string. */
 384         if (strncmp(buf, "LPS-", 4)) {
 385                 sr_spew("Unknown model code \"%s\"!", buf);
 386                 return NULL;
 387         }
 388
 389         /* Bug in device FW 1.17, model number is empty, so this can't work with this FW! */
 390         if (modelid == LPS_UNKNOWN) {
 391                 g_strstrip(buf);
 392                 for (cnt = LPS_301; cnt <= LPS_305; cnt++) {
 393                         if (!strcmp(buf, models[cnt].modelstr)) {
 394                                 modelid = cnt;
 395                                 break;
 396                         }
 397                 }
 398                 if (modelid == LPS_UNKNOWN) {
 399                         sr_err("Unable to detect model from model string '%s'!", buf);
 400                         return NULL;
 401                 }
 402         }
 403
 404         /* Query version */
 405         verstr = NULL;
 406         if ((ret = lps_cmd_reply(buf, serial, "VERSION")) == SR_OK) {
 407                 if (strncmp(buf, "Ver-", 4)) {
 408                         sr_spew("Version string %s not recognized.", buf);
 409                         goto exit_err;
 410                 }
 411
 412                 g_strstrip(buf);
 413                 verstr = buf + 4;
 414         }
 415         else /* Bug in device FW 1.17: Querying version string fails while output is active.
 416                 Therefore just print an error message, but do not exit with error. */
 417                 sr_err("Failed to query for hardware version: %s.",
 418                         sr_strerror(ret));
 419
 420         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 421         sdi->status = SR_ST_INACTIVE;
 422         sdi->vendor = g_strdup("Motech");
 423         sdi->model = g_strdup(models[modelid].modelstr);
 424         sdi->version = g_strdup(verstr);
 425         sdi->inst_type = SR_INST_SERIAL;
 426         sdi->conn = serial;
 427
 428         devc = g_malloc0(sizeof(struct dev_context));
 429         sr_sw_limits_init(&devc->limits);
 430         devc->model = &models[modelid];
 431
 432         sdi->priv = devc;
 433
 434         /* Setup channels and channel groups. */
 435         for (cnt = 0; cnt < models[modelid].num_channels; cnt++) {
 436                 snprintf(channel, sizeof(channel), "CH%d", cnt + 1);
 437                 ch = sr_channel_new(sdi, cnt, SR_CHANNEL_ANALOG, TRUE, channel);
 438
 439                 devc->channel_status[cnt].info = g_slist_append(NULL, ch);
 440
 441                 cg = g_malloc(sizeof(struct sr_channel_group));
 442                 snprintf(channel, sizeof(channel), "CG%d", cnt + 1);
 443                 cg->name = g_strdup(channel);
 444                 cg->priv = NULL;
 445                 cg->channels = g_slist_append(NULL, ch);
 446
 447                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 448         }
 449
 450         /* Query status */
 451         if (lps_query_status(sdi) != SR_OK)
 452                 goto exit_err;
 453
 454         serial_close(serial);
 455
 456         return std_scan_complete(drv, g_slist_append(NULL, sdi));
 457
 458 exit_err:
 459         sr_info("%s: Error!", __func__);
 460
 461         if (serial)
 462                 serial_close(serial);
 463         sr_serial_dev_inst_free(serial);
 464         g_free(devc);
 465         sr_dev_inst_free(sdi);
 466
 467         return NULL;
 468 }
 469
 470 /** Scan for LPS-301 device. */
 471 static GSList *scan_lps301(struct sr_dev_driver *di, GSList *options)
 472 {
 473         return do_scan(LPS_301, di, options);
 474 }
 475
 476 static void clear_helper(struct dev_context *devc)
 477 {
 478         int ch_idx;
 479
 480         /* Free channel_status.info (list only, data owned by sdi). */
 481         for (ch_idx = 0; ch_idx < devc->model->num_channels; ch_idx++)
 482                 g_slist_free(devc->channel_status[ch_idx].info);
 483 }
 484
 485 static int dev_clear(const struct sr_dev_driver *di)
 486 {
 487         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 488 }
 489
 490 static int config_get(uint32_t key, GVariant **data,
 491         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 492 {
 493         struct dev_context *devc;
 494         struct sr_channel *ch;
 495         int ch_idx;
 496
 497         if (!sdi)
 498                 return SR_ERR_ARG;
 499
 500         devc = sdi->priv;
 501
 502         if (!cg) {
 503                 switch (key) {
 504                 case SR_CONF_LIMIT_SAMPLES:
 505                 case SR_CONF_LIMIT_MSEC:
 506                         return sr_sw_limits_config_get(&devc->limits, key, data);
 507                 case SR_CONF_CHANNEL_CONFIG:
 508                         *data = g_variant_new_string(channel_modes[devc->tracking_mode]);
 509                         break;
 510                 default:
 511                         return SR_ERR_NA;
 512                 }
 513         } else {
 514                 /* We only ever have one channel per channel group in this driver. */
 515                 ch = cg->channels->data;
 516                 ch_idx = ch->index;
 517
 518                 switch (key) {
 519                 case SR_CONF_VOLTAGE:
 520                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_last);
 521                         break;
 522                 case SR_CONF_VOLTAGE_TARGET:
 523                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_max);
 524                         break;
 525                 case SR_CONF_CURRENT:
 526                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_last);
 527                         break;
 528                 case SR_CONF_CURRENT_LIMIT:
 529                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_max);
 530                         break;
 531                 case SR_CONF_ENABLED:
 532                         *data = g_variant_new_boolean(devc->channel_status[ch_idx].output_enabled);
 533                         break;
 534                 default:
 535                         return SR_ERR_NA;
 536                 }
 537         }
 538
 539         return SR_OK;
 540 }
 541
 542 static int config_set(uint32_t key, GVariant *data,
 543         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 544 {
 545         struct dev_context *devc;
 546         struct sr_channel *ch;
 547         gdouble dval;
 548         int ch_idx;
 549         gboolean bval;
 550         int idx;
 551
 552         devc = sdi->priv;
 553
 554         /* Cannot change settings while acquisition active, would cause a mess with commands.
 555          * Changing this would be possible, but tricky. */
 556         if (devc->acq_running)
 557                 return SR_ERR_NA;
 558
 559         if (!cg) {
 560                 switch (key) {
 561                 case SR_CONF_LIMIT_MSEC:
 562                 case SR_CONF_LIMIT_SAMPLES:
 563                         return sr_sw_limits_config_set(&devc->limits, key, data);
 564                 case SR_CONF_CHANNEL_CONFIG:
 565                         if ((idx = std_str_idx(data, ARRAY_AND_SIZE(channel_modes))) < 0)
 566                                 return SR_ERR_ARG;
 567                         if (devc->model->modelid <= LPS_303 && idx != 0)
 568                                 break; /* Only first setting possible for smaller models. */
 569                         if (devc->tracking_mode == idx)
 570                                 break;  /* Nothing to do! */
 571                         devc->tracking_mode = idx;
 572                         if (devc->model->modelid >= LPS_304) /* No use to set anything in the smaller models. */
 573                                 return lps_cmd_ok(sdi->conn, "TRACK%1d", devc->tracking_mode);
 574                         break;
 575                 default:
 576                         return SR_ERR_NA;
 577                 }
 578         } else {
 579                 /* We only ever have one channel per channel group in this driver. */
 580                 ch = cg->channels->data;
 581                 ch_idx = ch->index;
 582
 583                 switch (key) {
 584                 case SR_CONF_VOLTAGE_TARGET:
 585                         dval = g_variant_get_double(data);
 586                         if (dval < 0 || dval > devc->model->channels[ch_idx].voltage[1])
 587                                 return SR_ERR_ARG;
 588                         if (ch_idx == 2) {
 589                                 if (devc->model->modelid < LPS_304)
 590                                         return SR_ERR_ARG;
 591
 592                                 if (fabs(dval - 5.000) <= 0.001)
 593                                         dval = 5.0;
 594                                 else if ((devc->model->modelid >= LPS_305) && (fabs(dval - 3.300) <= 0.001))
 595                                         dval = 3.3;
 596                                 else return SR_ERR_ARG;
 597                         }
 598
 599                         devc->channel_status[ch_idx].output_voltage_max = dval;
 600                         if (ch_idx == 2)
 601                                 return lps_cmd_ok(sdi->conn, "VDD%1.0f", trunc(dval));
 602                         else
 603                                 return lps_cmd_ok(sdi->conn, "VSET%d %05.3f", ch_idx+1, dval);
 604                         break;
 605                 case SR_CONF_CURRENT_LIMIT:
 606                         dval = g_variant_get_double(data);
 607                         if (dval < 0 || dval > devc->model->channels[ch_idx].current[1])
 608                                 return SR_ERR_ARG;
 609                         if (ch_idx == 2) /* No current setting for CH3. */
 610                                 return SR_ERR_NA;
 611                         devc->channel_status[ch_idx].output_current_max = dval;
 612                         return lps_cmd_ok(sdi->conn, "ISET%d %05.4f", ch_idx+1, dval);
 613                 case SR_CONF_ENABLED:
 614                         bval = g_variant_get_boolean(data);
 615                         if (bval == devc->channel_status[ch_idx].output_enabled) /* Nothing to do. */
 616                                 break;
 617                         devc->channel_status[ch_idx].output_enabled = bval;
 618                         if (ch_idx != 2) { /* Channels 1,2 can be set only together. */
 619                                 devc->channel_status[ch_idx^1].output_enabled = bval;
 620                                 return lps_cmd_ok(sdi->conn, "OUT%1d", (int)bval);
 621                         } else { /* Channel 3: No command to disable output, set voltage to 0 instead. */
 622                                 if (bval)
 623                                         return lps_cmd_ok(sdi->conn, "VDD%1.0f", devc->channel_status[ch_idx].output_voltage_max);
 624                                 else
 625                                         return lps_cmd_ok(sdi->conn, "VDD0");
 626                         }
 627                         break;
 628                 default:
 629                         return SR_ERR_NA;
 630                 }
 631         }
 632
 633         return SR_OK;
 634 }
 635
 636 static int config_list(uint32_t key, GVariant **data,
 637         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 638 {
 639         struct dev_context *devc;
 640         struct sr_channel *ch;
 641         int ch_idx;
 642
 643         devc = (sdi) ? sdi->priv : NULL;
 644
 645         if (!cg) {
 646                 switch (key) {
 647                 case SR_CONF_SCAN_OPTIONS:
 648                 case SR_CONF_DEVICE_OPTIONS:
 649                         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 650                 case SR_CONF_CHANNEL_CONFIG:
 651                         if (!devc || !devc->model)
 652                                 return SR_ERR_ARG;
 653                         if (devc->model->modelid <= LPS_303) {
 654                                 /* The 1-channel models. */
 655                                 *data = g_variant_new_strv(channel_modes, 1);
 656                         } else {
 657                                 /* The other models support all modes. */
 658                                 *data = g_variant_new_strv(ARRAY_AND_SIZE(channel_modes));
 659                         }
 660                         return SR_OK;
 661                 default:
 662                         return SR_ERR_NA;
 663                 }
 664         }
 665
 666         /* We only ever have one channel per channel group in this driver. */
 667         ch = cg->channels->data;
 668         ch_idx = ch->index;
 669
 670         switch (key) {
 671         case SR_CONF_DEVICE_OPTIONS:
 672                 if ((ch_idx == 0) || (ch_idx == 1)) /* CH1, CH2 */
 673                         *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_ch12));
 674                 else /* Must be CH3 */
 675                         *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg_ch3));
 676                 break;
 677         case SR_CONF_VOLTAGE_TARGET:
 678                 if (!devc || !devc->model)
 679                         return SR_ERR_ARG;
 680                 *data = std_gvar_min_max_step_array(devc->model->channels[ch_idx].voltage);
 681                 break;
 682         case SR_CONF_CURRENT_LIMIT:
 683                 if (!devc || !devc->model)
 684                         return SR_ERR_ARG;
 685                 *data = std_gvar_min_max_step_array(devc->model->channels[ch_idx].current);
 686                 break;
 687         default:
 688                 return SR_ERR_NA;
 689         }
 690
 691         return SR_OK;
 692 }
 693
 694 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 695 {
 696         struct dev_context *devc;
 697         struct sr_serial_dev_inst *serial;
 698
 699         devc = sdi->priv;
 700
 701         devc->acq_running = TRUE;
 702
 703         serial = sdi->conn;
 704         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 705                         motech_lps_30x_receive_data, (void *)sdi);
 706         std_session_send_df_header(sdi);
 707
 708         sr_sw_limits_acquisition_start(&devc->limits);
 709
 710         devc->acq_req = AQ_NONE;
 711         /* Do not start polling device here, the read function will do it in 50 ms. */
 712
 713         return SR_OK;
 714 }
 715
 716 static struct sr_dev_driver motech_lps_301_driver_info = {
 717         .name = "motech-lps-301",
 718         .longname = "Motech LPS-301",
 719         .api_version = 1,
 720         .init = std_init,
 721         .cleanup = std_cleanup,
 722         .scan = scan_lps301,
 723         .dev_list = std_dev_list,
 724         .dev_clear = dev_clear,
 725         .config_get = config_get,
 726         .config_set = config_set,
 727         .config_list = config_list,
 728         .dev_open = std_serial_dev_open,
 729         .dev_close = std_serial_dev_close,
 730         .dev_acquisition_start = dev_acquisition_start,
 731         .dev_acquisition_stop = std_serial_dev_acquisition_stop,
 732         .context = NULL,
 733 };
 734 SR_REGISTER_DEV_DRIVER(motech_lps_301_driver_info);