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 static int init_lps301(struct sr_dev_driver *di, struct sr_context *sr_ctx)
 137 {
 138         return std_init(sr_ctx, di, LOG_PREFIX);
 139 }
 140
 141 /** Send command to device with va_list.
 142  */
 143 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char *fmt, va_list args)
 144 {
 145         int retc;
 146         char auxfmt[LINELEN_MAX];
 147         char buf[LINELEN_MAX];
 148
 149         snprintf(auxfmt, sizeof(auxfmt), "%s\r\n", fmt);
 150         vsnprintf(buf, sizeof(buf), auxfmt, args);
 151
 152         sr_spew("lps_send_va: \"%s\"", buf);
 153
 154         retc = serial_write_blocking(serial, buf, strlen(buf), 0);
 155
 156         if (retc < 0)
 157                 return SR_ERR;
 158
 159         return SR_OK;
 160 }
 161
 162 /** Send command to device.
 163  */
 164 SR_PRIV int lps_send_req(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 165 {
 166         int retc;
 167         va_list args;
 168
 169         va_start(args, fmt);
 170         retc = lps_send_va(serial, fmt, args);
 171         va_end(args);
 172
 173         return retc;
 174 }
 175
 176 /** Send command and consume simple OK reply. */
 177 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 178 {
 179         int retc;
 180         va_list args;
 181         char buf[LINELEN_MAX];
 182         char *bufptr;
 183         int  buflen;
 184
 185         /* Send command */
 186         va_start(args, fmt);
 187         retc = lps_send_va(serial, fmt, args);
 188         va_end(args);
 189
 190         if (retc != SR_OK)
 191                 return SR_ERR;
 192
 193         /* Read reply */
 194         buf[0] = '\0';
 195         bufptr = buf;
 196         buflen = sizeof(buf);
 197         retc = lps_read_reply(serial, &bufptr, &buflen);
 198         if ((retc == SR_OK) && (buflen == 0))
 199                 return SR_OK;
 200
 201         return SR_ERR;
 202 }
 203
 204 /** Send command and read reply string.
 205  *  @param reply Pointer to buffer of size LINELEN_MAX. Will be NUL-terminated.
 206  */
 207 SR_PRIV int lps_cmd_reply(char *reply, struct sr_serial_dev_inst *serial, const char *fmt, ...)
 208 {
 209         int retc;
 210         va_list args;
 211         char buf[LINELEN_MAX];
 212         char *bufptr;
 213         int  buflen;
 214
 215         reply[0] = '\0';
 216
 217         /* Send command */
 218         va_start(args, fmt);
 219         retc = lps_send_va(serial, fmt, args);
 220         va_end(args);
 221
 222         if (retc != SR_OK)
 223                 return SR_ERR;
 224
 225         /* Read reply */
 226         buf[0] = '\0';
 227         bufptr = buf;
 228         buflen = sizeof(buf);
 229         retc = lps_read_reply(serial, &bufptr, &buflen);
 230         if ((retc == SR_OK) && (buflen > 0)) {
 231                 strcpy(reply, buf);
 232                 return SR_OK;
 233         }
 234
 235         return SR_ERR;
 236 }
 237
 238 /** Process integer value returned by STATUS command. */
 239 SR_PRIV int lps_process_status(struct sr_dev_inst *sdi, int stat)
 240 {
 241         struct dev_context *devc;
 242         int tracking_mode;
 243
 244         devc = (struct dev_context *)sdi->priv;
 245
 246         sr_spew("Status: %d", stat);
 247         devc->channel_status[0].cc_mode = (stat & 0x01) != 0;
 248         sr_spew("Channel 1 %s mode", devc->channel_status[0].cc_mode?"CC":"CV");
 249         if (devc->model->num_channels > 1) {
 250                 devc->channel_status[1].cc_mode = (stat & 0x02) != 0;
 251                 sr_spew("Channel 2 %s mode", devc->channel_status[1].cc_mode?"CC":"CV");
 252
 253                 tracking_mode = (stat & 0x0c) >> 2;
 254                 switch (tracking_mode) {
 255                 case 0: devc->tracking_mode = 0;
 256                         break;
 257                 case 2: devc->tracking_mode = 1;
 258                         break;
 259                 case 3: devc->tracking_mode = 2;
 260                         break;
 261                 default:
 262                         sr_err("Illegal channel tracking mode %d!", tracking_mode);
 263                         devc->tracking_mode = 0;
 264                         break;
 265                 }
 266
 267                 sr_spew("Channel tracking: %d", devc->tracking_mode);
 268         }
 269         devc->channel_status[0].output_enabled = devc->channel_status[1].output_enabled = stat&0x040?TRUE:FALSE;
 270         sr_spew("Channel 1%s output: %s", devc->model->num_channels > 1?"+2":"", devc->channel_status[0].output_enabled?"ON":"OFF");
 271         if (devc->model->num_channels > 2) {
 272                 devc->channel_status[2].output_enabled = stat&0x010?TRUE:FALSE;
 273                 devc->channel_status[2].output_voltage_last = stat&0x020?3.3:5;
 274                 sr_spew("Channel 3 output: %s, U=%02f V, overload=%d",
 275                         devc->channel_status[2].output_enabled?"ON":"OFF",
 276                         devc->channel_status[2].output_voltage_last,
 277                         stat&0x080?1:0);
 278         }
 279         sr_spew("Fan=%d, beep=%d, CC output compensated=%d", stat&0x0100?1:0, stat&0x0200?1:0, stat&0x0400?1:0);
 280
 281         return SR_OK;
 282 }
 283
 284 /** Send STATUS commend and process status string. */
 285 SR_PRIV int lps_query_status(struct sr_dev_inst *sdi)
 286 {
 287         char buf[LINELEN_MAX];
 288         int stat, ret;
 289         struct dev_context *devc;
 290
 291         devc = (struct dev_context *)sdi->priv;
 292
 293         devc->req_sent_at = g_get_real_time();
 294
 295         if ((ret = lps_cmd_reply(buf, sdi->conn, "STATUS")) < 0) {
 296                 sr_err("%s: Failed to read status: %s.", __func__,
 297                         sr_strerror(ret));
 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, ret;
 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->context;
 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 ((ret = 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                 g_strstrip(buf);
 445                 verstr = buf + 4;
 446         }
 447         else  /* Bug in device FW 1.17: Querying version string fails while output is active.
 448                 Therefore just print an error message, but do not exit with error. */
 449                 sr_err("Failed to query for hardware version: %s.",
 450                         sr_strerror(ret));
 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(sdi, cnt, SR_CHANNEL_ANALOG, TRUE, channel);
 474
 475                 devc->channel_status[cnt].info = g_slist_append(NULL, ch);
 476
 477                 cg = g_malloc(sizeof(struct sr_channel_group));
 478                 snprintf(channel, sizeof(channel), "CG%d", cnt+1);
 479                 cg->name = g_strdup(channel);
 480                 cg->priv = NULL;
 481                 cg->channels = g_slist_append(NULL, ch);
 482
 483                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 484         }
 485
 486         drvc->instances = g_slist_append(drvc->instances, sdi);
 487         devices = g_slist_append(devices, sdi);
 488
 489         /* Query status */
 490         if (lps_query_status(sdi) != SR_OK)
 491                 goto exit_err;
 492
 493         serial_close(serial);
 494         if (!devices)
 495                 sr_serial_dev_inst_free(serial);
 496
 497         return devices;
 498
 499 exit_err:
 500         sr_info("%s: Error!", __func__);
 501
 502         if (serial) {
 503                 serial_close(serial);
 504                 sr_serial_dev_inst_free(serial);
 505         }
 506         g_free(devc);
 507         if (sdi)
 508                 sr_dev_inst_free(sdi);
 509
 510         return NULL;
 511 }
 512
 513 /** Scan for LPS-301 device. */
 514 static GSList *scan_lps301(struct sr_dev_driver *di, GSList *options)
 515 {
 516         return do_scan(LPS_301, di, options);
 517 }
 518
 519 static GSList *dev_list_lps301(const struct sr_dev_driver *di)
 520 {
 521         return ((struct drv_context *)(di->context))->instances;
 522 }
 523
 524 static void dev_clear_private(struct dev_context *devc)
 525 {
 526         int ch_idx;
 527
 528         /* Free channel_status.info (list only, data owned by sdi). */
 529         for (ch_idx = 0; ch_idx < devc->model->num_channels; ch_idx++)
 530                 g_slist_free(devc->channel_status[ch_idx].info);
 531
 532         g_timer_destroy(devc->elapsed_msec);
 533 }
 534
 535 static int dev_clear_lps301(const struct sr_dev_driver *di)
 536 {
 537         return std_dev_clear(di, (std_dev_clear_callback)dev_clear_private);
 538 }
 539
 540 static int cleanup(const struct sr_dev_driver *di)
 541 {
 542         return dev_clear_lps301(di);
 543 }
 544
 545 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 546                 const struct sr_channel_group *cg)
 547 {
 548         struct dev_context *devc;
 549         struct sr_channel *ch;
 550         int ch_idx;
 551
 552         if (!sdi)
 553                 return SR_ERR_ARG;
 554
 555         devc = sdi->priv;
 556
 557         if (!cg) {
 558                 /* No channel group: global options. */
 559                 switch (key) {
 560                 case SR_CONF_LIMIT_SAMPLES:
 561                         *data = g_variant_new_uint64(devc->limit_samples);
 562                         break;
 563                 case SR_CONF_LIMIT_MSEC:
 564                         *data = g_variant_new_uint64(devc->limit_msec);
 565                         break;
 566                 case SR_CONF_CHANNEL_CONFIG:
 567                         *data = g_variant_new_string(channel_modes[devc->tracking_mode]);
 568                         break;
 569                 default:
 570                         return SR_ERR_NA;
 571                 }
 572         } else {
 573                 /* We only ever have one channel per channel group in this driver. */
 574                 ch = cg->channels->data;
 575                 ch_idx = ch->index;
 576                 switch (key) {
 577                 case SR_CONF_VOLTAGE:
 578                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_last);
 579                         break;
 580                 case SR_CONF_VOLTAGE_TARGET:
 581                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_max);
 582                         break;
 583                 case SR_CONF_CURRENT:
 584                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_last);
 585                         break;
 586                 case SR_CONF_CURRENT_LIMIT:
 587                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_max);
 588                         break;
 589                 case SR_CONF_ENABLED:
 590                         *data = g_variant_new_boolean(devc->channel_status[ch_idx].output_enabled);
 591                         break;
 592                 default:
 593                         return SR_ERR_NA;
 594                 }
 595         }
 596
 597         return SR_OK;
 598 }
 599
 600 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 601                 const struct sr_channel_group *cg)
 602 {
 603         struct dev_context *devc;
 604         struct sr_channel *ch;
 605         gdouble dval;
 606         int ch_idx;
 607         const char *sval;
 608         gboolean bval;
 609         int idx;
 610         gboolean found;
 611
 612         if (sdi->status != SR_ST_ACTIVE)
 613                 return SR_ERR_DEV_CLOSED;
 614
 615         devc = sdi->priv;
 616
 617         /* Cannot change settings while acquisition active, would cause a mess with commands.
 618          * Changing this would be possible, but tricky. */
 619         if (devc->acq_running)
 620                 return SR_ERR_NA;
 621
 622         if (!cg) {
 623                 /* No channel group: global options. */
 624                 switch (key) {
 625                 case SR_CONF_LIMIT_MSEC:
 626                         devc->limit_msec = g_variant_get_uint64(data);
 627                         break;
 628                 case SR_CONF_LIMIT_SAMPLES:
 629                         devc->limit_samples = g_variant_get_uint64(data);
 630                         break;
 631                 case SR_CONF_CHANNEL_CONFIG:
 632                         sval = g_variant_get_string(data, NULL);
 633                         found = FALSE;
 634                         for (idx = 0; idx < (int)ARRAY_SIZE(channel_modes); idx++) {
 635                                 if (!strcmp(sval, channel_modes[idx])) {
 636                                         found = TRUE;
 637                                         if (devc->tracking_mode == idx)
 638                                                 break;  /* Nothing to do! */
 639                                         devc->tracking_mode = idx;
 640                                         if (devc->model->modelid >= LPS_304) /* No use to set anything in the smaller models. */
 641                                                 return lps_cmd_ok(sdi->conn, "TRACK%1d", devc->tracking_mode);
 642                                 }
 643                                 if (devc->model->modelid <= LPS_303) /* Only first setting possible for smaller models. */
 644                                         break;
 645                         }
 646                         if (!found)
 647                                 return SR_ERR_ARG;
 648                         break;
 649                 default:
 650                         return SR_ERR_NA;
 651                 }
 652         } else {
 653                 /* Channel group specified: per-channel options. */
 654                 /* We only ever have one channel per channel group in this driver. */
 655                 ch = cg->channels->data;
 656                 ch_idx = ch->index;
 657
 658                 switch (key) {
 659                 case SR_CONF_VOLTAGE_TARGET:
 660                         dval = g_variant_get_double(data);
 661                         if (dval < 0 || dval > devc->model->channels[ch_idx].voltage[1])
 662                                 return SR_ERR_ARG;
 663                         if (ch_idx == 2) {
 664                                 if (devc->model->modelid < LPS_304)
 665                                         return SR_ERR_ARG;
 666
 667                                 if (fabs(dval - 5.000) <= 0.001)
 668                                         dval = 5.0;
 669                                 else if ((devc->model->modelid >= LPS_305) && (fabs(dval - 3.300) <= 0.001))
 670                                         dval = 3.3;
 671                                 else return SR_ERR_ARG;
 672                         }
 673
 674                         devc->channel_status[ch_idx].output_voltage_max = dval;
 675                         if (ch_idx == 2)
 676                                 return lps_cmd_ok(sdi->conn, "VDD%1.0f", trunc(dval));
 677                         else
 678                                 return lps_cmd_ok(sdi->conn, "VSET%d %05.3f", ch_idx+1, dval);
 679                         break;
 680                 case SR_CONF_CURRENT_LIMIT:
 681                         dval = g_variant_get_double(data);
 682                         if (dval < 0 || dval > devc->model->channels[ch_idx].current[1])
 683                                 return SR_ERR_ARG;
 684                         if (ch_idx == 2) /* No current setting for CH3. */
 685                                 return SR_ERR_NA;
 686                         devc->channel_status[ch_idx].output_current_max = dval;
 687                         return lps_cmd_ok(sdi->conn, "ISET%d %05.4f", ch_idx+1, dval);
 688                         break;
 689                 case SR_CONF_ENABLED:
 690                         bval = g_variant_get_boolean(data);
 691                         if (bval == devc->channel_status[ch_idx].output_enabled) /* Nothing to do. */
 692                                 break;
 693                         devc->channel_status[ch_idx].output_enabled = bval;
 694                         if (ch_idx != 2) { /* Channels 1,2 can be set only together. */
 695                                 devc->channel_status[ch_idx^1].output_enabled = bval;
 696                                 return lps_cmd_ok(sdi->conn, "OUT%1d", (int)bval);
 697                         } else { /* Channel 3: No command to disable output, set voltage to 0 instead. */
 698                                 if (bval)
 699                                         return lps_cmd_ok(sdi->conn, "VDD%1.0f", devc->channel_status[ch_idx].output_voltage_max);
 700                                 else
 701                                         return lps_cmd_ok(sdi->conn, "VDD0");
 702                         }
 703                         break;
 704                 default:
 705                         return SR_ERR_NA;
 706                 }
 707         }
 708
 709         return SR_OK;
 710 }
 711
 712 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 713                 const struct sr_channel_group *cg)
 714 {
 715         struct dev_context *devc;
 716         struct sr_channel *ch;
 717         int ch_idx, i;
 718         GVariant *gvar;
 719         GVariantBuilder gvb;
 720
 721         /* Driver options, no device instance necessary. */
 722         switch (key) {
 723         case SR_CONF_SCAN_OPTIONS:
 724                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 725                         scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 726                 return SR_OK;
 727         case SR_CONF_DEVICE_OPTIONS:
 728                 if (sdi != NULL)
 729                         break;
 730                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 731                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 732                 return SR_OK;
 733         default:
 734                 if (!sdi)
 735                         return SR_ERR_ARG;
 736                 devc = sdi->priv;
 737                 break;
 738         }
 739
 740         /* Device options, independent from channel groups. */
 741         if (!cg) {
 742                 switch (key) {
 743                 case SR_CONF_DEVICE_OPTIONS:
 744                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 745                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 746                         return SR_OK;
 747                 case SR_CONF_CHANNEL_CONFIG:
 748                         if (devc->model->modelid <= LPS_303) {
 749                                 /* The 1-channel models. */
 750                                 *data = g_variant_new_strv(channel_modes, 1);
 751                         } else {
 752                                 /* The other models support all modes. */
 753                                 *data = g_variant_new_strv(channel_modes, ARRAY_SIZE(channel_modes));
 754                         }
 755                         return SR_OK;
 756                 default:
 757                         return SR_ERR_NA;
 758                 }
 759         }
 760
 761         /* Device options, depending on channel groups. */
 762         ch = cg->channels->data;
 763         ch_idx = ch->index;
 764         switch (key) {
 765         case SR_CONF_DEVICE_OPTIONS:
 766                 if ((ch_idx == 0) || (ch_idx == 1)) /* CH1, CH2 */
 767                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 768                                   devopts_ch12, ARRAY_SIZE(devopts_ch12), sizeof(uint32_t));
 769                 else /* Must be CH3 */
 770                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 771                                   devopts_ch3, ARRAY_SIZE(devopts_ch3), sizeof(uint32_t));
 772                 break;
 773         case SR_CONF_VOLTAGE_TARGET:
 774                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 775                 /* Min, max, step. */
 776                 for (i = 0; i < 3; i++) {
 777                         gvar = g_variant_new_double(devc->model->channels[ch_idx].voltage[i]);
 778                         g_variant_builder_add_value(&gvb, gvar);
 779                 }
 780                 *data = g_variant_builder_end(&gvb);
 781                 break;
 782         case SR_CONF_CURRENT_LIMIT:
 783                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 784                 /* Min, max, step. */
 785                 for (i = 0; i < 3; i++) {
 786                         gvar = g_variant_new_double(devc->model->channels[ch_idx].current[i]);
 787                         g_variant_builder_add_value(&gvb, gvar);
 788                 }
 789                 *data = g_variant_builder_end(&gvb);
 790                 break;
 791         default:
 792                 return SR_ERR_NA;
 793         }
 794
 795         return SR_OK;
 796 }
 797
 798 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 799 {
 800         struct dev_context *devc;
 801         struct sr_serial_dev_inst *serial;
 802
 803         if (sdi->status != SR_ST_ACTIVE)
 804                 return SR_ERR_DEV_CLOSED;
 805
 806         devc = sdi->priv;
 807
 808         devc->acq_running = TRUE;
 809
 810         serial = sdi->conn;
 811         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 812                         motech_lps_30x_receive_data, (void *)sdi);
 813         std_session_send_df_header(cb_data, LOG_PREFIX);
 814
 815         /* Start timer, if required. */
 816         if (devc->limit_msec)
 817                 g_timer_start(devc->elapsed_msec);
 818
 819         devc->acq_req = AQ_NONE;
 820         /* Do not start polling device here, the read function will do it in 50 ms. */
 821
 822         return SR_OK;
 823 }
 824
 825 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 826 {
 827         struct dev_context *devc;
 828
 829         /* Stop timer, if required. */
 830         if (sdi && (devc = sdi->priv) && devc->limit_msec)
 831                 g_timer_stop(devc->elapsed_msec);
 832
 833         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 834                         sdi->conn, LOG_PREFIX);
 835 }
 836
 837 SR_PRIV struct sr_dev_driver motech_lps_301_driver_info = {
 838         .name = "motech-lps-301",
 839         .longname = "Motech LPS-301",
 840         .api_version = 1,
 841         .init = init_lps301,
 842         .cleanup = cleanup,
 843         .scan = scan_lps301,
 844         .dev_list = dev_list_lps301,
 845         .dev_clear = dev_clear_lps301,
 846         .config_get = config_get,
 847         .config_set = config_set,
 848         .config_list = config_list,
 849         .dev_open = std_serial_dev_open,
 850         .dev_close = std_serial_dev_close,
 851         .dev_acquisition_start = dev_acquisition_start,
 852         .dev_acquisition_stop = dev_acquisition_stop,
 853         .context = NULL,
 854 };