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 /** @file
  22  *  <em>Motech LPS-30x series</em> power supply driver
  23  *  @internal
  24  */
  25
  26 #include <config.h>
  27 #include <ctype.h>
  28 #include <math.h>
  29 #include <string.h>
  30 #include "protocol.h"
  31
  32 /* Forward declarations */
  33 SR_PRIV struct sr_dev_driver motech_lps_301_driver_info;
  34 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen);
  35 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char *fmt, va_list args);
  36 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char *fmt, ...);
  37 SR_PRIV int lps_cmd_reply(char *reply, struct sr_serial_dev_inst *serial, const char *fmt, ...);
  38 SR_PRIV int lps_query_status(struct sr_dev_inst *sdi);
  39
  40 /* Serial communication parameters */
  41 #define SERIALCOMM "2400/8n1/dtr=1/rts=1/flow=0"
  42
  43 #define VENDOR_MOTECH "Motech"
  44
  45 /** Driver capabilities generic. */
  46 static const uint32_t drvopts[] = {
  47         /* Device class */
  48         SR_CONF_POWER_SUPPLY,
  49 };
  50
  51 /** Driver scanning options. */
  52 static const uint32_t scanopts[] = {
  53         SR_CONF_CONN,
  54         SR_CONF_SERIALCOMM,
  55 };
  56
  57 /** Hardware capabilities generic. */
  58 static const uint32_t devopts[] = {
  59         /* Device class */
  60         SR_CONF_POWER_SUPPLY,
  61         /* Acquisition modes. */
  62         SR_CONF_CONTINUOUS,
  63         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  64         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  65         /* Device configuration */
  66         SR_CONF_CHANNEL_CONFIG | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  67 };
  68
  69 /** Hardware capabilities channel 1, 2. */
  70 static const uint32_t devopts_ch12[] = {
  71         SR_CONF_VOLTAGE | SR_CONF_GET,
  72         SR_CONF_VOLTAGE_TARGET | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  73         SR_CONF_CURRENT | SR_CONF_GET,
  74         SR_CONF_CURRENT_LIMIT | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  75         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  76 };
  77
  78 /** Hardware capabilities channel 3. (LPS-304/305 only). */
  79 static const uint32_t devopts_ch3[] = {
  80         SR_CONF_VOLTAGE | SR_CONF_GET,
  81         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  82 };
  83
  84 static const char *channel_modes[] = {
  85         "Independent",
  86         "Track1",
  87         "Track2",
  88 };
  89
  90 static const struct lps_modelspec models[] = {
  91         { LPS_UNKNOWN, "Dummy", 0,
  92                 {
  93
  94                 }
  95         },
  96         { LPS_301, "LPS-301", 1,
  97                 {
  98                         /* Channel 1 */
  99                         { { 0, 32, 0.01 }, { 0.005, 2, 0.001 } },
 100                 },
 101         },
 102         { LPS_302, "LPS-302", 1,
 103                 {
 104                         /* Channel 1 */
 105                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 106                 },
 107         },
 108         { LPS_303, "LPS-303", 1,
 109                 {
 110                         /* Channel 1 */
 111                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 112                 },
 113         },
 114         { LPS_304, "LPS-304", 3,
 115                 {
 116                         /* Channel 1 */
 117                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 118                         /* Channel 2 */
 119                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 120                         /* Channel 3 */
 121                         { { 5, 5, 0.0 }, { 0.005, 3, 0.001 } },
 122                 },
 123         },
 124         { LPS_305, "LPS-305", 3,
 125                 {
 126                         /* Channel 1 */
 127                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 128                         /* Channel 2 */
 129                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 130                         /* Channel 3 */
 131                         { { 3.3, 5, 1.7 }, { 0.005, 3, 0.001 } },
 132                 },
 133         },
 134 };
 135
 136 /** Send command to device with va_list.
 137  */
 138 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char *fmt, va_list args)
 139 {
 140         int retc;
 141         char auxfmt[LINELEN_MAX];
 142         char buf[LINELEN_MAX];
 143
 144         snprintf(auxfmt, sizeof(auxfmt), "%s\r\n", fmt);
 145         vsnprintf(buf, sizeof(buf), auxfmt, args);
 146
 147         sr_spew("lps_send_va: \"%s\"", buf);
 148
 149         retc = serial_write_blocking(serial, buf, strlen(buf),
 150                         serial_timeout(serial, strlen(buf)));
 151
 152         if (retc < 0)
 153                 return SR_ERR;
 154
 155         return SR_OK;
 156 }
 157
 158 /** Send command to device.
 159  */
 160 SR_PRIV int lps_send_req(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 161 {
 162         int retc;
 163         va_list args;
 164
 165         va_start(args, fmt);
 166         retc = lps_send_va(serial, fmt, args);
 167         va_end(args);
 168
 169         return retc;
 170 }
 171
 172 /** Send command and consume simple OK reply. */
 173 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 174 {
 175         int retc;
 176         va_list args;
 177         char buf[LINELEN_MAX];
 178         char *bufptr;
 179         int  buflen;
 180
 181         /* Send command */
 182         va_start(args, fmt);
 183         retc = lps_send_va(serial, fmt, args);
 184         va_end(args);
 185
 186         if (retc != SR_OK)
 187                 return SR_ERR;
 188
 189         /* Read reply */
 190         buf[0] = '\0';
 191         bufptr = buf;
 192         buflen = sizeof(buf);
 193         retc = lps_read_reply(serial, &bufptr, &buflen);
 194         if ((retc == SR_OK) && (buflen == 0))
 195                 return SR_OK;
 196
 197         return SR_ERR;
 198 }
 199
 200 /** Send command and read reply string.
 201  *  @param reply Pointer to buffer of size LINELEN_MAX. Will be NUL-terminated.
 202  */
 203 SR_PRIV int lps_cmd_reply(char *reply, struct sr_serial_dev_inst *serial, const char *fmt, ...)
 204 {
 205         int retc;
 206         va_list args;
 207         char buf[LINELEN_MAX];
 208         char *bufptr;
 209         int  buflen;
 210
 211         reply[0] = '\0';
 212
 213         /* Send command */
 214         va_start(args, fmt);
 215         retc = lps_send_va(serial, fmt, args);
 216         va_end(args);
 217
 218         if (retc != SR_OK)
 219                 return SR_ERR;
 220
 221         /* Read reply */
 222         buf[0] = '\0';
 223         bufptr = buf;
 224         buflen = sizeof(buf);
 225         retc = lps_read_reply(serial, &bufptr, &buflen);
 226         if ((retc == SR_OK) && (buflen > 0)) {
 227                 strcpy(reply, buf);
 228                 return SR_OK;
 229         }
 230
 231         return SR_ERR;
 232 }
 233
 234 /** Process integer value returned by STATUS command. */
 235 SR_PRIV int lps_process_status(struct sr_dev_inst *sdi, int stat)
 236 {
 237         struct dev_context *devc;
 238         int tracking_mode;
 239
 240         devc = sdi->priv;
 241
 242         sr_spew("Status: %d", stat);
 243         devc->channel_status[0].cc_mode = (stat & 0x01) != 0;
 244         sr_spew("Channel 1 %s mode", devc->channel_status[0].cc_mode?"CC":"CV");
 245         if (devc->model->num_channels > 1) {
 246                 devc->channel_status[1].cc_mode = (stat & 0x02) != 0;
 247                 sr_spew("Channel 2 %s mode", devc->channel_status[1].cc_mode?"CC":"CV");
 248
 249                 tracking_mode = (stat & 0x0c) >> 2;
 250                 switch (tracking_mode) {
 251                 case 0: devc->tracking_mode = 0;
 252                         break;
 253                 case 2: devc->tracking_mode = 1;
 254                         break;
 255                 case 3: devc->tracking_mode = 2;
 256                         break;
 257                 default:
 258                         sr_err("Illegal channel tracking mode %d!", tracking_mode);
 259                         devc->tracking_mode = 0;
 260                         break;
 261                 }
 262
 263                 sr_spew("Channel tracking: %d", devc->tracking_mode);
 264         }
 265         devc->channel_status[0].output_enabled = devc->channel_status[1].output_enabled = stat&0x040?TRUE:FALSE;
 266         sr_spew("Channel 1%s output: %s", devc->model->num_channels > 1?"+2":"", devc->channel_status[0].output_enabled?"ON":"OFF");
 267         if (devc->model->num_channels > 2) {
 268                 devc->channel_status[2].output_enabled = stat&0x010?TRUE:FALSE;
 269                 devc->channel_status[2].output_voltage_last = stat&0x020?3.3:5;
 270                 sr_spew("Channel 3 output: %s, U=%02f V, overload=%d",
 271                         devc->channel_status[2].output_enabled?"ON":"OFF",
 272                         devc->channel_status[2].output_voltage_last,
 273                         stat&0x080?1:0);
 274         }
 275         sr_spew("Fan=%d, beep=%d, CC output compensated=%d", stat&0x0100?1:0, stat&0x0200?1:0, stat&0x0400?1:0);
 276
 277         return SR_OK;
 278 }
 279
 280 /** Send STATUS commend and process status string. */
 281 SR_PRIV int lps_query_status(struct sr_dev_inst *sdi)
 282 {
 283         char buf[LINELEN_MAX];
 284         int stat, ret;
 285         struct dev_context *devc;
 286
 287         devc = sdi->priv;
 288
 289         devc->req_sent_at = g_get_real_time();
 290
 291         if ((ret = lps_cmd_reply(buf, sdi->conn, "STATUS")) < 0) {
 292                 sr_err("%s: Failed to read status: %s.", __func__,
 293                         sr_strerror(ret));
 294                 return SR_ERR;
 295         }
 296
 297         if (sr_atoi(buf, &stat) != SR_OK)
 298                 return SR_ERR;
 299
 300         return lps_process_status(sdi, stat);
 301 }
 302
 303 static gint64 calc_timeout_ms(gint64 start_us)
 304 {
 305         gint64 result = REQ_TIMEOUT_MS - ((g_get_real_time() - start_us) / 1000);
 306
 307         if (result < 0)
 308                 return 0;
 309
 310         return result;
 311 }
 312
 313 /** Read message into buf until "OK" received.
 314  *  @retval SR_OK Msg received; buf and buflen contain result, if any except OK.
 315  *  @retval SR_ERR Error, including timeout.
 316 */
 317 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen)
 318 {
 319         int retries;
 320         char buf2[LINELEN_MAX];
 321         char *buf2ptr;
 322         int buf2len;
 323         gint64 timeout_start;
 324
 325         *buf[0] = '\0';
 326
 327         /* Read one line. It is either a data message or "OK". */
 328         timeout_start = g_get_real_time();
 329         buf2len = *buflen;
 330         /* Up to 5 tries because serial_readline() will consume only one CR or LF per
 331          * call, but device sends up to 4 in a row. */
 332         for (retries = 0; retries < 5; retries++) {
 333                 *buflen = buf2len;
 334                 if (serial_readline(serial, buf, buflen, calc_timeout_ms(timeout_start)) != SR_OK)
 335                         return SR_ERR;
 336                 if (!strcmp(*buf, "OK")) { /* We got an OK! */
 337                         *buf[0] = '\0';
 338                         *buflen = 0;
 339                         return SR_OK;
 340                 }
 341                 if (*buflen > 0) /* We got a msg! */
 342                         break;
 343         }
 344
 345         /* A data msg is in buf (possibly ERROR), need to consume "OK". */
 346         buf2[0] = '\0';
 347         buf2ptr = buf2;
 348         for (retries = 0; retries < 5; retries++) {
 349                 buf2len = sizeof(buf2);
 350                 if (serial_readline(serial, &buf2ptr, &buf2len, calc_timeout_ms(timeout_start)) != SR_OK)
 351                         return SR_ERR;
 352
 353                 if (!strcmp(buf2ptr, "OK")) { /* We got an OK! */
 354                         if (!strcmp(*buf, "ERROR")) { /* OK came after msg ERROR! */
 355                                 sr_spew("ERROR found!");
 356                                 *buf[0] = '\0';
 357                                 *buflen = 0;
 358                                 return SR_ERR;
 359                         }
 360                         return SR_OK;
 361                 }
 362         }
 363
 364         return SR_ERR; /* Timeout! */
 365 }
 366
 367 /** Scan for LPS-300 series device.
 368  */
 369 static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *options)
 370 {
 371         struct sr_dev_inst *sdi;
 372         struct drv_context *drvc;
 373         struct dev_context *devc;
 374         struct sr_serial_dev_inst *serial;
 375         struct sr_channel *ch;
 376         struct sr_channel_group *cg;
 377         GSList *devices;
 378         const char *conn, *serialcomm;
 379         int cnt, ret;
 380         gchar buf[LINELEN_MAX];
 381         gchar channel[10];
 382         char *verstr;
 383
 384         sdi = NULL;
 385         devc = NULL;
 386         conn = serialcomm = NULL;
 387         devices = NULL;
 388
 389         drvc = drv->context;
 390         drvc->instances = NULL;
 391
 392         sr_spew("scan() called!");
 393
 394         /* Process and check options. */
 395         if (sr_serial_extract_options(options, &conn, &serialcomm) != SR_OK)
 396                 return NULL;
 397         if (!serialcomm)
 398                 serialcomm = SERIALCOMM;
 399
 400         /* Init serial port. */
 401         serial = sr_serial_dev_inst_new(conn, serialcomm);
 402
 403         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 404                 goto exit_err;
 405
 406         /* Query and verify model string. */
 407         serial_flush(serial);
 408         if (lps_cmd_reply(buf, serial, "MODEL") != SR_OK)
 409                 return NULL;
 410
 411         /* Check model string. */
 412         if (strncmp(buf, "LPS-", 4)) {
 413                 sr_spew("Unknown model code \"%s\"!", buf);
 414                 return NULL;
 415         }
 416
 417         /* Bug in device FW 1.17, model number is empty, so this can't work with this FW! */
 418         if (modelid == LPS_UNKNOWN) {
 419                 g_strstrip(buf);
 420                 for (cnt = LPS_301; cnt <= LPS_305; cnt++) {
 421                         if (!strcmp(buf, models[cnt].modelstr)) {
 422                                 modelid = cnt;
 423                                 break;
 424                         }
 425                 }
 426                 if (modelid == LPS_UNKNOWN) {
 427                         sr_err("Unable to detect model from model string '%s'!", buf);
 428                         return NULL;
 429                 }
 430         }
 431
 432         /* Query version */
 433         verstr = NULL;
 434         if ((ret = lps_cmd_reply(buf, serial, "VERSION")) == SR_OK) {
 435                 if (strncmp(buf, "Ver-", 4)) {
 436                         sr_spew("Version string %s not recognized.", buf);
 437                         goto exit_err;
 438                 }
 439
 440                 g_strstrip(buf);
 441                 verstr = buf + 4;
 442         }
 443         else  /* Bug in device FW 1.17: Querying version string fails while output is active.
 444                 Therefore just print an error message, but do not exit with error. */
 445                 sr_err("Failed to query for hardware version: %s.",
 446                         sr_strerror(ret));
 447
 448         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 449         sdi->status = SR_ST_INACTIVE;
 450         sdi->vendor = g_strdup(VENDOR_MOTECH);
 451         sdi->model = g_strdup(models[modelid].modelstr);
 452         sdi->version = g_strdup(verstr);
 453         sdi->driver = drv;
 454         sdi->inst_type = SR_INST_SERIAL;
 455         sdi->conn = serial;
 456
 457         devc = g_malloc0(sizeof(struct dev_context));
 458         sr_sw_limits_init(&devc->limits);
 459         devc->model = &models[modelid];
 460
 461         sdi->priv = devc;
 462
 463         /* Setup channels and channel groups. */
 464         for (cnt = 0; cnt < models[modelid].num_channels; cnt++) {
 465                 snprintf(channel, sizeof(channel), "CH%d", cnt + 1);
 466                 ch = sr_channel_new(sdi, cnt, SR_CHANNEL_ANALOG, TRUE, channel);
 467
 468                 devc->channel_status[cnt].info = g_slist_append(NULL, ch);
 469
 470                 cg = g_malloc(sizeof(struct sr_channel_group));
 471                 snprintf(channel, sizeof(channel), "CG%d", cnt+1);
 472                 cg->name = g_strdup(channel);
 473                 cg->priv = NULL;
 474                 cg->channels = g_slist_append(NULL, ch);
 475
 476                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 477         }
 478
 479         drvc->instances = g_slist_append(drvc->instances, sdi);
 480         devices = g_slist_append(devices, sdi);
 481
 482         /* Query status */
 483         if (lps_query_status(sdi) != SR_OK)
 484                 goto exit_err;
 485
 486         serial_close(serial);
 487         if (!devices)
 488                 sr_serial_dev_inst_free(serial);
 489
 490         return devices;
 491
 492 exit_err:
 493         sr_info("%s: Error!", __func__);
 494
 495         if (serial) {
 496                 serial_close(serial);
 497                 sr_serial_dev_inst_free(serial);
 498         }
 499         g_free(devc);
 500         if (sdi)
 501                 sr_dev_inst_free(sdi);
 502
 503         return NULL;
 504 }
 505
 506 /** Scan for LPS-301 device. */
 507 static GSList *scan_lps301(struct sr_dev_driver *di, GSList *options)
 508 {
 509         return do_scan(LPS_301, di, options);
 510 }
 511
 512 static void dev_clear_private(struct dev_context *devc)
 513 {
 514         int ch_idx;
 515
 516         /* Free channel_status.info (list only, data owned by sdi). */
 517         for (ch_idx = 0; ch_idx < devc->model->num_channels; ch_idx++)
 518                 g_slist_free(devc->channel_status[ch_idx].info);
 519 }
 520
 521 static int dev_clear_lps301(const struct sr_dev_driver *di)
 522 {
 523         return std_dev_clear(di, (std_dev_clear_callback)dev_clear_private);
 524 }
 525
 526 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 527                 const struct sr_channel_group *cg)
 528 {
 529         struct dev_context *devc;
 530         struct sr_channel *ch;
 531         int ch_idx;
 532
 533         if (!sdi)
 534                 return SR_ERR_ARG;
 535
 536         devc = sdi->priv;
 537
 538         if (!cg) {
 539                 /* No channel group: global options. */
 540                 switch (key) {
 541                 case SR_CONF_LIMIT_SAMPLES:
 542                 case SR_CONF_LIMIT_MSEC:
 543                         return sr_sw_limits_config_get(&devc->limits, key, data);
 544                 case SR_CONF_CHANNEL_CONFIG:
 545                         *data = g_variant_new_string(channel_modes[devc->tracking_mode]);
 546                         break;
 547                 default:
 548                         return SR_ERR_NA;
 549                 }
 550         } else {
 551                 /* We only ever have one channel per channel group in this driver. */
 552                 ch = cg->channels->data;
 553                 ch_idx = ch->index;
 554                 switch (key) {
 555                 case SR_CONF_VOLTAGE:
 556                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_last);
 557                         break;
 558                 case SR_CONF_VOLTAGE_TARGET:
 559                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_max);
 560                         break;
 561                 case SR_CONF_CURRENT:
 562                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_last);
 563                         break;
 564                 case SR_CONF_CURRENT_LIMIT:
 565                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_max);
 566                         break;
 567                 case SR_CONF_ENABLED:
 568                         *data = g_variant_new_boolean(devc->channel_status[ch_idx].output_enabled);
 569                         break;
 570                 default:
 571                         return SR_ERR_NA;
 572                 }
 573         }
 574
 575         return SR_OK;
 576 }
 577
 578 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 579                 const struct sr_channel_group *cg)
 580 {
 581         struct dev_context *devc;
 582         struct sr_channel *ch;
 583         gdouble dval;
 584         int ch_idx;
 585         const char *sval;
 586         gboolean bval;
 587         int idx;
 588         gboolean found;
 589
 590         if (sdi->status != SR_ST_ACTIVE)
 591                 return SR_ERR_DEV_CLOSED;
 592
 593         devc = sdi->priv;
 594
 595         /* Cannot change settings while acquisition active, would cause a mess with commands.
 596          * Changing this would be possible, but tricky. */
 597         if (devc->acq_running)
 598                 return SR_ERR_NA;
 599
 600         if (!cg) {
 601                 /* No channel group: global options. */
 602                 switch (key) {
 603                 case SR_CONF_LIMIT_MSEC:
 604                 case SR_CONF_LIMIT_SAMPLES:
 605                         return sr_sw_limits_config_set(&devc->limits, key, data);
 606                 case SR_CONF_CHANNEL_CONFIG:
 607                         sval = g_variant_get_string(data, NULL);
 608                         found = FALSE;
 609                         for (idx = 0; idx < (int)ARRAY_SIZE(channel_modes); idx++) {
 610                                 if (!strcmp(sval, channel_modes[idx])) {
 611                                         found = TRUE;
 612                                         if (devc->tracking_mode == idx)
 613                                                 break;  /* Nothing to do! */
 614                                         devc->tracking_mode = idx;
 615                                         if (devc->model->modelid >= LPS_304) /* No use to set anything in the smaller models. */
 616                                                 return lps_cmd_ok(sdi->conn, "TRACK%1d", devc->tracking_mode);
 617                                 }
 618                                 if (devc->model->modelid <= LPS_303) /* Only first setting possible for smaller models. */
 619                                         break;
 620                         }
 621                         if (!found)
 622                                 return SR_ERR_ARG;
 623                         break;
 624                 default:
 625                         return SR_ERR_NA;
 626                 }
 627         } else {
 628                 /* Channel group specified: per-channel options. */
 629                 /* We only ever have one channel per channel group in this driver. */
 630                 ch = cg->channels->data;
 631                 ch_idx = ch->index;
 632
 633                 switch (key) {
 634                 case SR_CONF_VOLTAGE_TARGET:
 635                         dval = g_variant_get_double(data);
 636                         if (dval < 0 || dval > devc->model->channels[ch_idx].voltage[1])
 637                                 return SR_ERR_ARG;
 638                         if (ch_idx == 2) {
 639                                 if (devc->model->modelid < LPS_304)
 640                                         return SR_ERR_ARG;
 641
 642                                 if (fabs(dval - 5.000) <= 0.001)
 643                                         dval = 5.0;
 644                                 else if ((devc->model->modelid >= LPS_305) && (fabs(dval - 3.300) <= 0.001))
 645                                         dval = 3.3;
 646                                 else return SR_ERR_ARG;
 647                         }
 648
 649                         devc->channel_status[ch_idx].output_voltage_max = dval;
 650                         if (ch_idx == 2)
 651                                 return lps_cmd_ok(sdi->conn, "VDD%1.0f", trunc(dval));
 652                         else
 653                                 return lps_cmd_ok(sdi->conn, "VSET%d %05.3f", ch_idx+1, dval);
 654                         break;
 655                 case SR_CONF_CURRENT_LIMIT:
 656                         dval = g_variant_get_double(data);
 657                         if (dval < 0 || dval > devc->model->channels[ch_idx].current[1])
 658                                 return SR_ERR_ARG;
 659                         if (ch_idx == 2) /* No current setting for CH3. */
 660                                 return SR_ERR_NA;
 661                         devc->channel_status[ch_idx].output_current_max = dval;
 662                         return lps_cmd_ok(sdi->conn, "ISET%d %05.4f", ch_idx+1, dval);
 663                         break;
 664                 case SR_CONF_ENABLED:
 665                         bval = g_variant_get_boolean(data);
 666                         if (bval == devc->channel_status[ch_idx].output_enabled) /* Nothing to do. */
 667                                 break;
 668                         devc->channel_status[ch_idx].output_enabled = bval;
 669                         if (ch_idx != 2) { /* Channels 1,2 can be set only together. */
 670                                 devc->channel_status[ch_idx^1].output_enabled = bval;
 671                                 return lps_cmd_ok(sdi->conn, "OUT%1d", (int)bval);
 672                         } else { /* Channel 3: No command to disable output, set voltage to 0 instead. */
 673                                 if (bval)
 674                                         return lps_cmd_ok(sdi->conn, "VDD%1.0f", devc->channel_status[ch_idx].output_voltage_max);
 675                                 else
 676                                         return lps_cmd_ok(sdi->conn, "VDD0");
 677                         }
 678                         break;
 679                 default:
 680                         return SR_ERR_NA;
 681                 }
 682         }
 683
 684         return SR_OK;
 685 }
 686
 687 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 688                 const struct sr_channel_group *cg)
 689 {
 690         struct dev_context *devc;
 691         struct sr_channel *ch;
 692         int ch_idx, i;
 693         GVariant *gvar;
 694         GVariantBuilder gvb;
 695
 696         /* Driver options, no device instance necessary. */
 697         switch (key) {
 698         case SR_CONF_SCAN_OPTIONS:
 699                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 700                         scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 701                 return SR_OK;
 702         case SR_CONF_DEVICE_OPTIONS:
 703                 if (sdi != NULL)
 704                         break;
 705                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 706                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 707                 return SR_OK;
 708         default:
 709                 if (!sdi)
 710                         return SR_ERR_ARG;
 711                 devc = sdi->priv;
 712                 break;
 713         }
 714
 715         /* Device options, independent from channel groups. */
 716         if (!cg) {
 717                 switch (key) {
 718                 case SR_CONF_DEVICE_OPTIONS:
 719                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 720                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 721                         return SR_OK;
 722                 case SR_CONF_CHANNEL_CONFIG:
 723                         if (devc->model->modelid <= LPS_303) {
 724                                 /* The 1-channel models. */
 725                                 *data = g_variant_new_strv(channel_modes, 1);
 726                         } else {
 727                                 /* The other models support all modes. */
 728                                 *data = g_variant_new_strv(channel_modes, ARRAY_SIZE(channel_modes));
 729                         }
 730                         return SR_OK;
 731                 default:
 732                         return SR_ERR_NA;
 733                 }
 734         }
 735
 736         /* Device options, depending on channel groups. */
 737         ch = cg->channels->data;
 738         ch_idx = ch->index;
 739         switch (key) {
 740         case SR_CONF_DEVICE_OPTIONS:
 741                 if ((ch_idx == 0) || (ch_idx == 1)) /* CH1, CH2 */
 742                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 743                                   devopts_ch12, ARRAY_SIZE(devopts_ch12), sizeof(uint32_t));
 744                 else /* Must be CH3 */
 745                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 746                                   devopts_ch3, ARRAY_SIZE(devopts_ch3), sizeof(uint32_t));
 747                 break;
 748         case SR_CONF_VOLTAGE_TARGET:
 749                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 750                 /* Min, max, step. */
 751                 for (i = 0; i < 3; i++) {
 752                         gvar = g_variant_new_double(devc->model->channels[ch_idx].voltage[i]);
 753                         g_variant_builder_add_value(&gvb, gvar);
 754                 }
 755                 *data = g_variant_builder_end(&gvb);
 756                 break;
 757         case SR_CONF_CURRENT_LIMIT:
 758                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 759                 /* Min, max, step. */
 760                 for (i = 0; i < 3; i++) {
 761                         gvar = g_variant_new_double(devc->model->channels[ch_idx].current[i]);
 762                         g_variant_builder_add_value(&gvb, gvar);
 763                 }
 764                 *data = g_variant_builder_end(&gvb);
 765                 break;
 766         default:
 767                 return SR_ERR_NA;
 768         }
 769
 770         return SR_OK;
 771 }
 772
 773 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 774 {
 775         struct dev_context *devc;
 776         struct sr_serial_dev_inst *serial;
 777
 778         if (sdi->status != SR_ST_ACTIVE)
 779                 return SR_ERR_DEV_CLOSED;
 780
 781         devc = sdi->priv;
 782
 783         devc->acq_running = TRUE;
 784
 785         serial = sdi->conn;
 786         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 787                         motech_lps_30x_receive_data, (void *)sdi);
 788         std_session_send_df_header(sdi, LOG_PREFIX);
 789
 790         sr_sw_limits_acquisition_start(&devc->limits);
 791
 792         devc->acq_req = AQ_NONE;
 793         /* Do not start polling device here, the read function will do it in 50 ms. */
 794
 795         return SR_OK;
 796 }
 797
 798 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 799 {
 800         return std_serial_dev_acquisition_stop(sdi, std_serial_dev_close,
 801                         sdi->conn, LOG_PREFIX);
 802 }
 803
 804 SR_PRIV struct sr_dev_driver motech_lps_301_driver_info = {
 805         .name = "motech-lps-301",
 806         .longname = "Motech LPS-301",
 807         .api_version = 1,
 808         .init = std_init,
 809         .cleanup = std_cleanup,
 810         .scan = scan_lps301,
 811         .dev_list = std_dev_list,
 812         .dev_clear = dev_clear_lps301,
 813         .config_get = config_get,
 814         .config_set = config_set,
 815         .config_list = config_list,
 816         .dev_open = std_serial_dev_open,
 817         .dev_close = std_serial_dev_close,
 818         .dev_acquisition_start = dev_acquisition_start,
 819         .dev_acquisition_stop = dev_acquisition_stop,
 820         .context = NULL,
 821 };