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 <ctype.h>
  27 #include <errno.h>
  28 #include <math.h>
  29 #include <string.h>
  30
  31 #include "protocol.h"
  32
  33 /* Forward declarations */
  34 SR_PRIV struct sr_dev_driver motech_lps_301_driver_info;
  35 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen);
  36 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char* fmt, va_list args);
  37 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char* fmt, ...);
  38 SR_PRIV int lps_cmd_reply(char* reply, struct sr_serial_dev_inst *serial, const char* fmt, ...);
  39 SR_PRIV int lps_query_status(struct sr_dev_inst* sdi);
  40
  41 /* Serial communication parameters */
  42 #define SERIALCOMM "2400/8n1/dtr=1/rts=1/flow=0"
  43
  44 #define VENDOR_MOTECH "Motech"
  45
  46 /** Driver capabilities generic. */
  47 static const uint32_t drvopts[] = {
  48         /* Device class */
  49         SR_CONF_POWER_SUPPLY,
  50 };
  51
  52 /** Driver scanning options. */
  53 static const uint32_t scanopts[] = {
  54         SR_CONF_CONN,
  55         SR_CONF_SERIALCOMM,
  56 };
  57
  58 /** Hardware capabilities generic. */
  59 static const uint32_t devopts[] = {
  60         /* Device class */
  61         SR_CONF_POWER_SUPPLY,
  62         /* Aquisition modes. */
  63         SR_CONF_CONTINUOUS,
  64         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  65         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  66         /* Device configuration */
  67         SR_CONF_OUTPUT_CHANNEL_CONFIG | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  68 };
  69
  70 /** Hardware capabilities channel 1, 2. */
  71 static const uint32_t devopts_ch12[] = {
  72         SR_CONF_OUTPUT_VOLTAGE | SR_CONF_GET,
  73         SR_CONF_OUTPUT_VOLTAGE_TARGET | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  74         SR_CONF_OUTPUT_CURRENT | SR_CONF_GET,
  75         SR_CONF_OUTPUT_CURRENT_LIMIT | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  76         SR_CONF_OUTPUT_ENABLED | SR_CONF_GET | SR_CONF_SET,
  77 };
  78
  79 /** Hardware capabilities channel 3. (LPS-304/305 only). */
  80 static const uint32_t devopts_ch3[] = {
  81         SR_CONF_OUTPUT_VOLTAGE | SR_CONF_GET,
  82         SR_CONF_OUTPUT_ENABLED | SR_CONF_GET | SR_CONF_SET,
  83 };
  84
  85 static const char *channel_modes[] = {
  86         "Independent",
  87         "Track1",
  88         "Track2",
  89 };
  90
  91 static struct lps_modelspec models[] = {
  92         { LPS_UNKNOWN, "Dummy", 0,
  93                 {
  94
  95                 }
  96         },
  97         { LPS_301, "LPS-301", 1,
  98                 {
  99                         /* Channel 1 */
 100                         { { 0, 32, 0.01 }, { 0.005, 2, 0.001 } },
 101                 },
 102         },
 103         { LPS_302, "LPS-302", 1,
 104                 {
 105                         /* Channel 1 */
 106                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 107                 },
 108         },
 109         { LPS_303, "LPS-303", 1,
 110                 {
 111                         /* Channel 1 */
 112                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 113                 },
 114         },
 115         { LPS_304, "LPS-304", 3,
 116                 {
 117                         /* Channel 1 */
 118                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 119                         /* Channel 2 */
 120                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 121                         /* Channel 3 */
 122                         { { 5, 5, 0.0 }, { 0.005, 3, 0.001 } },
 123                 },
 124         },
 125         { LPS_305, "LPS-305", 3,
 126                 {
 127                         /* Channel 1 */
 128                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 129                         /* Channel 2 */
 130                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 131                         /* Channel 3 */
 132                         { { 3.3, 5, 1.7 }, { 0.005, 3, 0.001 } },
 133                 },
 134         },
 135 };
 136
 137 static int init_lps301(struct sr_context *sr_ctx)
 138 {
 139         return std_init(sr_ctx, &motech_lps_301_driver_info, LOG_PREFIX);
 140 }
 141
 142 /** Send command to device with va_list.
 143  */
 144 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char* fmt, va_list args)
 145 {
 146         int retc;
 147         char auxfmt[LINELEN_MAX];
 148         char buf[LINELEN_MAX];
 149
 150         snprintf(auxfmt, sizeof(auxfmt), "%s\r\n", fmt);
 151         vsnprintf(buf, sizeof(buf), auxfmt, args);
 152
 153         sr_spew("lps_send_va: \"%s\"", buf);
 154
 155         retc = serial_write_blocking(serial, buf, strlen(buf), 0);
 156
 157         if (retc < 0)
 158                 return SR_ERR;
 159
 160         return SR_OK;
 161 }
 162
 163 /** Send command to device.
 164  */
 165 SR_PRIV int lps_send_req(struct sr_serial_dev_inst *serial, const char* fmt, ...)
 166 {
 167         int retc;
 168         va_list args;
 169
 170         va_start(args, fmt);
 171         retc = lps_send_va(serial, fmt, args);
 172         va_end(args);
 173
 174         return retc;
 175 }
 176
 177 /** Send command and consume simple OK reply. */
 178 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char* fmt, ...)
 179 {
 180         int retc;
 181         va_list args;
 182         char buf[LINELEN_MAX];
 183         char* bufptr;
 184         int  buflen;
 185
 186         /* Send command */
 187         va_start(args, fmt);
 188         retc = lps_send_va(serial, fmt, args);
 189         va_end(args);
 190
 191         if (retc != SR_OK)
 192                 return SR_ERR;
 193
 194         /* Read reply */
 195         buf[0] = '\0';
 196         bufptr = buf;
 197         buflen = sizeof(buf);
 198         retc = lps_read_reply(serial, &bufptr, &buflen);
 199         if ((retc == SR_OK) && (buflen == 0))
 200                 return SR_OK;
 201
 202         return SR_ERR;
 203 }
 204
 205 /** Send command and read reply string.
 206  *  \param reply Pointer to buffer of size LINELEN_MAX. Will be NUL-terminated.
 207  */
 208 SR_PRIV int lps_cmd_reply(char* reply, struct sr_serial_dev_inst *serial, const char* fmt, ...)
 209 {
 210         int retc;
 211         va_list args;
 212         char buf[LINELEN_MAX];
 213         char* bufptr;
 214         int  buflen;
 215
 216         reply[0] = '\0';
 217
 218         /* Send command */
 219         va_start(args, fmt);
 220         retc = lps_send_va(serial, fmt, args);
 221         va_end(args);
 222
 223         if (retc != SR_OK)
 224                 return SR_ERR;
 225
 226         /* Read reply */
 227         buf[0] = '\0';
 228         bufptr = buf;
 229         buflen = sizeof(buf);
 230         retc = lps_read_reply(serial, &bufptr, &buflen);
 231         if ((retc == SR_OK) && (buflen > 0)) {
 232                 strcpy(reply, buf);
 233                 return SR_OK;
 234         }
 235
 236         return SR_ERR;
 237 }
 238
 239 /** Process integer value returned by STATUS command. */
 240 SR_PRIV int lps_process_status(struct sr_dev_inst* sdi, int stat)
 241 {
 242         struct dev_context* devc;
 243         int tracking_mode;
 244
 245         devc = (struct dev_context*)sdi->priv;
 246
 247         sr_spew("Status: %d", stat);
 248         devc->channel_status[0].cc_mode = (stat & 0x01) != 0;
 249         sr_spew("Channel 1 %s mode", devc->channel_status[0].cc_mode?"CC":"CV");
 250         if (devc->model->num_channels > 1) {
 251                 devc->channel_status[1].cc_mode = (stat & 0x02) != 0;
 252                 sr_spew("Channel 2 %s mode", devc->channel_status[1].cc_mode?"CC":"CV");
 253
 254                 tracking_mode = (stat & 0x0c) >> 2;
 255                 switch (tracking_mode) {
 256                 case 0: devc->tracking_mode = 0;
 257                         break;
 258                 case 2: devc->tracking_mode = 1;
 259                         break;
 260                 case 3: devc->tracking_mode = 2;
 261                         break;
 262                 default:
 263                         sr_err("Illegal channel tracking mode %d!", tracking_mode);
 264                         devc->tracking_mode = 0;
 265                         break;
 266                 }
 267
 268                 sr_spew("Channel tracking: %d", devc->tracking_mode);
 269         }
 270         devc->channel_status[0].output_enabled = devc->channel_status[1].output_enabled = stat&0x040?TRUE:FALSE;
 271         sr_spew("Channel 1%s output: %s", devc->model->num_channels > 1?"+2":"", devc->channel_status[0].output_enabled?"ON":"OFF");
 272         if (devc->model->num_channels > 2) {
 273                 devc->channel_status[2].output_enabled = stat&0x010?TRUE:FALSE;
 274                 devc->channel_status[2].output_voltage_last = stat&0x020?3.3:5;
 275                 sr_spew("Channel 3 output: %s, U=%02f V, overload=%d",
 276                         devc->channel_status[2].output_enabled?"ON":"OFF",
 277                         devc->channel_status[2].output_voltage_last,
 278                         stat&0x080?1:0);
 279         }
 280         sr_spew("Fan=%d, beep=%d, CC output compensated=%d", stat&0x0100?1:0, stat&0x0200?1:0, stat&0x0400?1:0);
 281
 282         return SR_OK;
 283 }
 284
 285 /** Send STATUS commend and process status string. */
 286 SR_PRIV int lps_query_status(struct sr_dev_inst* sdi)
 287 {
 288         char buf[LINELEN_MAX];
 289         int stat;
 290         struct dev_context* devc;
 291
 292         devc = (struct dev_context*)sdi->priv;
 293
 294         devc->req_sent_at = g_get_real_time();
 295
 296         if (lps_cmd_reply(buf, sdi->conn, "STATUS") < 0) {
 297                 sr_err("%s: Failed to read status: %d %s", __func__, errno, strerror(errno));
 298                 return SR_ERR;
 299         }
 300
 301         if (sr_atoi(buf, &stat) != SR_OK)
 302                 return SR_ERR;
 303
 304         return lps_process_status(sdi, stat);
 305 }
 306
 307 static gint64 calc_timeout_ms(gint64 start_us)
 308 {
 309         gint64 result = REQ_TIMEOUT_MS - ((g_get_real_time() - start_us) / 1000);
 310
 311         if (result < 0)
 312                 return 0;
 313
 314         return result;
 315 }
 316
 317 /** Read message into buf until "OK" received.
 318  *  \retval SR_OK Msg received; buf and buflen contain result, if any except OK.
 319  *  \retval SR_ERR Error, including timeout.
 320 */
 321 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen)
 322 {
 323         int retries;
 324         char buf2[LINELEN_MAX];
 325         char *buf2ptr;
 326         int buf2len;
 327         gint64 timeout_start;
 328
 329         *buf[0] = '\0';
 330
 331         /* Read one line. It is either a data message or "OK". */
 332         timeout_start = g_get_real_time();
 333         buf2len = *buflen;
 334         /* Up to 5 tries because serial_readline() will consume only one CR or LF per
 335          * call, but device sends up to 4 in a row. */
 336         for (retries = 0; retries < 5; retries++) {
 337                 *buflen = buf2len;
 338                 if (serial_readline(serial, buf, buflen, calc_timeout_ms(timeout_start)) != SR_OK)
 339                         return SR_ERR;
 340                 if (!strcmp(*buf, "OK")) { /* We got an OK! */
 341                         *buf[0] = '\0';
 342                         *buflen = 0;
 343                         return SR_OK;
 344                 }
 345                 if (*buflen > 0) /* We got a msg! */
 346                         break;
 347         }
 348
 349         /* A data msg is in buf (possibly ERROR), need to consume "OK". */
 350         buf2[0] = '\0';
 351         buf2ptr = buf2;
 352         for (retries = 0; retries < 5; retries++) {
 353                 buf2len = sizeof(buf2);
 354                 if (serial_readline(serial, &buf2ptr, &buf2len, calc_timeout_ms(timeout_start)) != SR_OK)
 355                         return SR_ERR;
 356
 357                 if (!strcmp(buf2ptr, "OK")) { /* We got an OK! */
 358                         if (!strcmp(*buf, "ERROR")) { /* OK came after msg ERROR! */
 359                                 sr_spew("ERROR found!");
 360                                 *buf[0] = '\0';
 361                                 *buflen = 0;
 362                                 return SR_ERR;
 363                         }
 364                         return SR_OK;
 365                 }
 366         }
 367
 368         return SR_ERR; /* Timeout! */
 369 }
 370
 371 /** Scan for LPS-300 series device.
 372  */
 373 static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *options)
 374 {
 375         struct sr_dev_inst *sdi;
 376         struct drv_context *drvc;
 377         struct dev_context *devc;
 378         struct sr_serial_dev_inst *serial;
 379         struct sr_channel *ch;
 380         struct sr_channel_group *cg;
 381         GSList *devices;
 382         const char *conn, *serialcomm;
 383         int cnt;
 384         gchar buf[LINELEN_MAX];
 385         gchar channel[10];
 386         char *verstr;
 387
 388         sdi = NULL;
 389         devc = NULL;
 390         conn = serialcomm = NULL;
 391         devices = NULL;
 392
 393         drvc = drv->priv;
 394         drvc->instances = NULL;
 395
 396         sr_spew("scan() called!");
 397
 398         /* Process and check options. */
 399         if (sr_serial_extract_options(options, &conn, &serialcomm) != SR_OK)
 400                 return NULL;
 401         if (!serialcomm)
 402                 serialcomm = SERIALCOMM;
 403
 404         /* Init serial port. */
 405         serial = sr_serial_dev_inst_new(conn, serialcomm);
 406
 407         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 408                 goto exit_err;
 409
 410         /* Query and verify model string. */
 411         serial_flush(serial);
 412         if (lps_cmd_reply(buf, serial, "MODEL") != SR_OK)
 413                 return NULL;
 414
 415         /* Check model string. */
 416         if (strncmp(buf, "LPS-", 4)) {
 417                 sr_spew("Unknown model code \"%s\"!", buf);
 418                 return NULL;
 419         }
 420
 421         /* Bug in device FW 1.17, model number is empty, so this can't work with this FW! */
 422         if (modelid == LPS_UNKNOWN) {
 423                 g_strstrip(buf);
 424                 for (cnt = LPS_301; cnt <= LPS_305; cnt++) {
 425                         if (!strcmp(buf, models[cnt].modelstr)) {
 426                                 modelid = cnt;
 427                                 break;
 428                         }
 429                 }
 430                 if (modelid == LPS_UNKNOWN) {
 431                         sr_err("Unable to detect model from model string '%s'!", buf);
 432                         return NULL;
 433                 }
 434         }
 435
 436         /* Query version */
 437         verstr = NULL;
 438         if (lps_cmd_reply(buf, serial, "VERSION") == SR_OK) {
 439                 if (strncmp(buf, "Ver-", 4)) {
 440                         sr_spew("Version string %s not recognized.", buf);
 441                         goto exit_err;
 442                 }
 443
 444
 445                 g_strstrip(buf);
 446                 verstr = buf + 4;
 447         }
 448         else  /* Bug in device FW 1.17: Quering version string fails while output is active.
 449                 Therefore just print an error message, but do not exit with error. */
 450                 sr_err("Failed to query for hardware version: %d %s", errno, strerror(errno));
 451
 452         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 453         sdi->status = SR_ST_INACTIVE;
 454         sdi->vendor = g_strdup(VENDOR_MOTECH);
 455         sdi->model = g_strdup(models[modelid].modelstr);
 456         sdi->version = g_strdup(verstr);
 457         sdi->driver = drv;
 458         sdi->inst_type = SR_INST_SERIAL;
 459         sdi->conn = serial;
 460
 461         devc = g_malloc0(sizeof(struct dev_context));
 462         devc->model = &models[modelid];
 463         devc->limit_samples = 0;
 464         devc->limit_msec = 0;
 465         devc->num_samples = 0;
 466         devc->elapsed_msec = g_timer_new();
 467
 468         sdi->priv = devc;
 469
 470         /* Setup channels and channel groups. */
 471         for (cnt = 0; cnt < models[modelid].num_channels; cnt++) {
 472                 snprintf(channel, sizeof(channel), "CH%d", cnt + 1);
 473                 ch = sr_channel_new(cnt, SR_CHANNEL_ANALOG, TRUE, channel);
 474                 sdi->channels = g_slist_append(sdi->channels, ch);
 475
 476                 devc->channel_status[cnt].info = g_slist_append(NULL, ch);
 477
 478                 cg = g_malloc(sizeof(struct sr_channel_group));
 479                 snprintf(channel, sizeof(channel), "CG%d", cnt+1);
 480                 cg->name = g_strdup(channel);
 481                 cg->priv = NULL;
 482                 cg->channels = g_slist_append(NULL, ch);
 483
 484                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 485         }
 486
 487         drvc->instances = g_slist_append(drvc->instances, sdi);
 488         devices = g_slist_append(devices, sdi);
 489
 490         /* Query status */
 491         if (lps_query_status(sdi) != SR_OK)
 492                 goto exit_err;
 493
 494         serial_close(serial);
 495         if (!devices)
 496                 sr_serial_dev_inst_free(serial);
 497
 498         return devices;
 499
 500 exit_err:
 501         sr_info("%s: Error!", __func__);
 502
 503         if (serial) {
 504                 serial_close(serial);
 505                 sr_serial_dev_inst_free(serial);
 506         }
 507         if (devc)
 508                 g_free(devc);
 509         if (sdi)
 510                 sr_dev_inst_free(sdi);
 511
 512         return NULL;
 513 }
 514
 515 /** Scan for LPS-301 device. */
 516 static GSList *scan_lps301(GSList *options)
 517 {
 518         return do_scan(LPS_301, &motech_lps_301_driver_info, options);
 519 }
 520
 521 static GSList *doDevList(struct sr_dev_driver *drv)
 522 {
 523         return ((struct drv_context *)(drv->priv))->instances;
 524 }
 525
 526 static GSList *dev_list_lps301(void)
 527 {
 528         return doDevList(&motech_lps_301_driver_info);
 529 }
 530
 531 static void dev_clear_private(struct dev_context* devc)
 532 {
 533         int ch_idx;
 534
 535         /* Free channel_status.info (list only, data owned by sdi). */
 536         for (ch_idx = 0; ch_idx < devc->model->num_channels; ch_idx++)
 537                 g_slist_free(devc->channel_status[ch_idx].info);
 538
 539         g_timer_destroy(devc->elapsed_msec);
 540 }
 541
 542 static int dev_clear_lps301(void)
 543 {
 544         return std_dev_clear(&motech_lps_301_driver_info, (std_dev_clear_callback)dev_clear_private);
 545 }
 546
 547 static int cleanup(void)
 548 {
 549         return dev_clear_lps301();
 550 }
 551
 552 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 553                 const struct sr_channel_group *cg)
 554 {
 555         struct dev_context *devc;
 556         struct sr_channel *ch;
 557         int ch_idx;
 558
 559         if (!sdi)
 560                 return SR_ERR_ARG;
 561
 562         devc = sdi->priv;
 563
 564         if (!cg) {
 565                 /* No channel group: global options. */
 566                 switch (key) {
 567                 case SR_CONF_LIMIT_SAMPLES:
 568                         *data = g_variant_new_uint64(devc->limit_samples);
 569                         break;
 570                 case SR_CONF_LIMIT_MSEC:
 571                         *data = g_variant_new_uint64(devc->limit_msec);
 572                         break;
 573                 case SR_CONF_OUTPUT_CHANNEL_CONFIG:
 574                         *data = g_variant_new_string(channel_modes[devc->tracking_mode]);
 575                         break;
 576                 default:
 577                         return SR_ERR_NA;
 578                 }
 579         } else {
 580                 /* We only ever have one channel per channel group in this driver. */
 581                 ch = cg->channels->data;
 582                 ch_idx = ch->index;
 583                 switch (key) {
 584                 case SR_CONF_OUTPUT_VOLTAGE:
 585                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_last);
 586                         break;
 587                 case SR_CONF_OUTPUT_VOLTAGE_TARGET:
 588                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_max);
 589                         break;
 590                 case SR_CONF_OUTPUT_CURRENT:
 591                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_last);
 592                         break;
 593                 case SR_CONF_OUTPUT_CURRENT_LIMIT:
 594                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_max);
 595                         break;
 596                 case SR_CONF_OUTPUT_ENABLED:
 597                         *data = g_variant_new_boolean(devc->channel_status[ch_idx].output_enabled);
 598                         break;
 599                 default:
 600                         return SR_ERR_NA;
 601                 }
 602         }
 603
 604         return SR_OK;
 605 }
 606
 607 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 608                 const struct sr_channel_group *cg)
 609 {
 610         struct dev_context *devc;
 611         struct sr_channel *ch;
 612         gdouble dval;
 613         int ch_idx;
 614         const char *sval;
 615         gboolean bval;
 616         int idx;
 617         gboolean found;
 618
 619         if (sdi->status != SR_ST_ACTIVE)
 620                 return SR_ERR_DEV_CLOSED;
 621
 622         devc = sdi->priv;
 623
 624         /* Cannot change settings while acquisition active, would cause a mess with commands.
 625          * Changing this would be possible, but tricky. */
 626         if (devc->acq_running)
 627                 return SR_ERR_NA;
 628
 629         if (!cg) {
 630                 /* No channel group: global options. */
 631                 switch (key) {
 632                 case SR_CONF_LIMIT_MSEC:
 633                         if (g_variant_get_uint64(data) == 0) {
 634                                 sr_err("LIMIT_MSEC can't be 0.");
 635                                 return SR_ERR;
 636                         }
 637                         devc->limit_msec = g_variant_get_uint64(data);
 638                         sr_dbg("Setting time limit to %" PRIu64 "ms.",
 639                                 devc->limit_msec);
 640                         break;
 641                 case SR_CONF_LIMIT_SAMPLES:
 642                         devc->limit_samples = g_variant_get_uint64(data);
 643                         sr_dbg("Setting sample limit to %" PRIu64 ".",
 644                                 devc->limit_samples);
 645                         break;
 646                 case SR_CONF_OUTPUT_CHANNEL_CONFIG:
 647                         sval = g_variant_get_string(data, NULL);
 648                         found = FALSE;
 649                         for (idx = 0; idx < (int)ARRAY_SIZE(channel_modes); idx++)
 650                         {
 651                                 if (!strcmp(sval, channel_modes[idx])) {
 652                                         found = TRUE;
 653                                         if (devc->tracking_mode == idx)
 654                                                 break;  /* Nothing to do! */
 655                                         devc->tracking_mode = idx;
 656                                         if (devc->model->modelid >= LPS_304) /* No use to set anything in the smaller models. */
 657                                                 return lps_cmd_ok(sdi->conn, "TRACK%1d", devc->tracking_mode);
 658                                 }
 659                                 if (devc->model->modelid <= LPS_303) /* Only first setting possible for smaller models. */
 660                                         break;
 661                         }
 662                         if (!found) {
 663                                 return SR_ERR_ARG;
 664                         }
 665                         break;
 666                 default:
 667                         return SR_ERR_NA;
 668                 }
 669         } else {
 670                 /* Channel group specified: per-channel options. */
 671                 /* We only ever have one channel per channel group in this driver. */
 672                 ch = cg->channels->data;
 673                 ch_idx = ch->index;
 674
 675                 switch (key) {
 676                 case SR_CONF_OUTPUT_VOLTAGE_TARGET:
 677                         dval = g_variant_get_double(data);
 678                         if (dval < 0 || dval > devc->model->channels[ch_idx].voltage[1])
 679                                 return SR_ERR_ARG;
 680                         if (ch_idx == 2) {
 681                                 if (devc->model->modelid < LPS_304)
 682                                         return SR_ERR_ARG;
 683
 684                                 if (fabs(dval - 5.000) <= 0.001)
 685                                         dval = 5.0;
 686                                 else if ((devc->model->modelid >= LPS_305) && (fabs(dval - 3.300) <= 0.001))
 687                                         dval = 3.3;
 688                                 else return SR_ERR_ARG;
 689                         }
 690
 691                         devc->channel_status[ch_idx].output_voltage_max = dval;
 692                         if (ch_idx == 2)
 693                                 return lps_cmd_ok(sdi->conn, "VDD%1.0f", trunc(dval));
 694                         else
 695                                 return lps_cmd_ok(sdi->conn, "VSET%d %05.3f", ch_idx+1, dval);
 696                         break;
 697                 case SR_CONF_OUTPUT_CURRENT_LIMIT:
 698                         dval = g_variant_get_double(data);
 699                         if (dval < 0 || dval > devc->model->channels[ch_idx].current[1])
 700                                 return SR_ERR_ARG;
 701                         if (ch_idx == 2) /* No current setting for CH3. */
 702                                 return SR_ERR_NA;
 703                         devc->channel_status[ch_idx].output_current_max = dval;
 704                         return lps_cmd_ok(sdi->conn, "ISET%d %05.4f", ch_idx+1, dval);
 705                         break;
 706                 case SR_CONF_OUTPUT_ENABLED:
 707                         bval = g_variant_get_boolean(data);
 708                         if (bval == devc->channel_status[ch_idx].output_enabled) /* Nothing to do. */
 709                                 break;
 710                         devc->channel_status[ch_idx].output_enabled = bval;
 711                         if (ch_idx != 2) { /* Channels 1,2 can be set only together. */
 712                                 devc->channel_status[ch_idx^1].output_enabled = bval;
 713                                 return lps_cmd_ok(sdi->conn, "OUT%1d", (int)bval);
 714                         } else { /* Channel 3: No command to disable output, set voltage to 0 instead. */
 715                                 if (bval)
 716                                         return lps_cmd_ok(sdi->conn, "VDD%1.0f", devc->channel_status[ch_idx].output_voltage_max);
 717                                 else
 718                                         return lps_cmd_ok(sdi->conn, "VDD0");
 719                         }
 720                         break;
 721                 default:
 722                         return SR_ERR_NA;
 723                 }
 724         }
 725
 726         return SR_OK;
 727 }
 728
 729 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 730                 const struct sr_channel_group *cg)
 731 {
 732         struct dev_context *devc;
 733         struct sr_channel *ch;
 734         int ch_idx, i;
 735         GVariant *gvar;
 736         GVariantBuilder gvb;
 737
 738         (void)data;
 739
 740         /* Driver options, no device instance necessary. */
 741         switch (key) {
 742         case SR_CONF_SCAN_OPTIONS:
 743                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 744                                                   scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 745                 return SR_OK;
 746         case SR_CONF_DEVICE_OPTIONS:
 747                 if (sdi != NULL)
 748                         break;
 749                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 750                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 751                 return SR_OK;
 752         default:
 753                 if (sdi == NULL)
 754                         return SR_ERR_ARG;
 755
 756                 devc = sdi->priv;
 757         }
 758
 759         /* Device options, independent from channel groups. */
 760         if (cg == NULL) {
 761                 switch (key) {
 762                 case SR_CONF_DEVICE_OPTIONS:
 763                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 764                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 765                         return SR_OK;
 766                 case SR_CONF_OUTPUT_CHANNEL_CONFIG:
 767                         if (devc->model->modelid <= LPS_303) {
 768                                 /* The 1-channel models. */
 769                                 *data = g_variant_new_strv(channel_modes, 1);
 770                         } else {
 771                                 /* The other models support all modes. */
 772                                 *data = g_variant_new_strv(channel_modes, ARRAY_SIZE(channel_modes));
 773                         }
 774                         return SR_OK;
 775                         break;
 776                 default:
 777                         return SR_ERR_NA;
 778                 }
 779         }
 780
 781         /* Device options, depending on channel groups. */
 782         ch = cg->channels->data;
 783         ch_idx = ch->index;
 784         switch (key) {
 785         case SR_CONF_DEVICE_OPTIONS:
 786                 if ((ch_idx == 0) || (ch_idx == 1)) /* CH1, CH2 */
 787                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 788                                   devopts_ch12, ARRAY_SIZE(devopts_ch12), sizeof(uint32_t));
 789                 else /* Must be CH3 */
 790                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 791                                   devopts_ch3, ARRAY_SIZE(devopts_ch3), sizeof(uint32_t));
 792                 break;
 793         case SR_CONF_OUTPUT_VOLTAGE_TARGET:
 794                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 795                 /* Min, max, step. */
 796                 for (i = 0; i < 3; i++) {
 797                         gvar = g_variant_new_double(devc->model->channels[ch_idx].voltage[i]);
 798                         g_variant_builder_add_value(&gvb, gvar);
 799                 }
 800                 *data = g_variant_builder_end(&gvb);
 801                 break;
 802         case SR_CONF_OUTPUT_CURRENT_LIMIT:
 803                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 804                 /* Min, max, step. */
 805                 for (i = 0; i < 3; i++) {
 806                         gvar = g_variant_new_double(devc->model->channels[ch_idx].current[i]);
 807                         g_variant_builder_add_value(&gvb, gvar);
 808                 }
 809                 *data = g_variant_builder_end(&gvb);
 810                 break;
 811         default:
 812                 return SR_ERR_NA;
 813         }
 814
 815         return SR_OK;
 816 }
 817
 818 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 819                                     void *cb_data)
 820 {
 821         struct dev_context *devc;
 822         struct sr_serial_dev_inst *serial;
 823
 824         if (sdi->status != SR_ST_ACTIVE)
 825                 return SR_ERR_DEV_CLOSED;
 826
 827         devc = sdi->priv;
 828
 829         devc->acq_running = TRUE;
 830
 831         serial = sdi->conn;
 832         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 833                         motech_lps_30x_receive_data, (void *)sdi);
 834         std_session_send_df_header(cb_data, LOG_PREFIX);
 835
 836         /* Start timer, if required. */
 837         if (devc->limit_msec)
 838                 g_timer_start(devc->elapsed_msec);
 839
 840         devc->acq_req = AQ_NONE;
 841         /* Do not start polling device here, the read function will do it in 50 ms. */
 842
 843         return SR_OK;
 844 }
 845
 846 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 847 {
 848         struct dev_context *devc;
 849
 850         /* Stop timer, if required. */
 851         if (sdi && (devc = sdi->priv) && devc->limit_msec)
 852                 g_timer_stop(devc->elapsed_msec);
 853
 854         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 855                         sdi->conn, LOG_PREFIX);
 856 }
 857
 858 SR_PRIV struct sr_dev_driver motech_lps_301_driver_info = {
 859         .name = "motech-lps-301",
 860         .longname = "Motech LPS-301",
 861         .api_version = 1,
 862         .init = init_lps301,
 863         .cleanup = cleanup,
 864         .scan = scan_lps301,
 865         .dev_list = dev_list_lps301,
 866         .dev_clear = dev_clear_lps301,
 867         .config_get = config_get,
 868         .config_set = config_set,
 869         .config_list = config_list,
 870         .dev_open = std_serial_dev_open,
 871         .dev_close = std_serial_dev_close,
 872         .dev_acquisition_start = dev_acquisition_start,
 873         .dev_acquisition_stop = dev_acquisition_stop,
 874         .priv = NULL,
 875 };