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

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
   5  * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> (code from atten-pps3xxx)
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <ctype.h>
  23 #include <math.h>
  24 #include <string.h>
  25 #include "protocol.h"
  26
  27 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen);
  28 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char *fmt, va_list args);
  29 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char *fmt, ...);
  30 SR_PRIV int lps_cmd_reply(char *reply, struct sr_serial_dev_inst *serial, const char *fmt, ...);
  31 SR_PRIV int lps_query_status(struct sr_dev_inst *sdi);
  32
  33 #define SERIALCOMM "2400/8n1/dtr=1/rts=1/flow=0"
  34
  35 #define VENDOR_MOTECH "Motech"
  36
  37 static const uint32_t scanopts[] = {
  38         SR_CONF_CONN,
  39         SR_CONF_SERIALCOMM,
  40 };
  41
  42 static const uint32_t drvopts[] = {
  43         SR_CONF_POWER_SUPPLY,
  44 };
  45
  46 static const uint32_t devopts[] = {
  47         SR_CONF_CONTINUOUS,
  48         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  49         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  50         SR_CONF_CHANNEL_CONFIG | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  51 };
  52
  53 /** Hardware capabilities channel 1, 2. */
  54 static const uint32_t devopts_cg_ch12[] = {
  55         SR_CONF_VOLTAGE | SR_CONF_GET,
  56         SR_CONF_VOLTAGE_TARGET | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  57         SR_CONF_CURRENT | SR_CONF_GET,
  58         SR_CONF_CURRENT_LIMIT | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  59         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  60 };
  61
  62 /** Hardware capabilities channel 3 (LPS-304/305 only). */
  63 static const uint32_t devopts_cg_ch3[] = {
  64         SR_CONF_VOLTAGE | SR_CONF_GET,
  65         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  66 };
  67
  68 static const char *channel_modes[] = {
  69         "Independent",
  70         "Track1",
  71         "Track2",
  72 };
  73
  74 static const struct lps_modelspec models[] = {
  75         { LPS_UNKNOWN, "Dummy", 0,
  76                 {
  77
  78                 }
  79         },
  80         { LPS_301, "LPS-301", 1,
  81                 {
  82                         /* Channel 1 */
  83                         { { 0, 32, 0.01 }, { 0.005, 2, 0.001 } },
  84                 },
  85         },
  86         { LPS_302, "LPS-302", 1,
  87                 {
  88                         /* Channel 1 */
  89                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
  90                 },
  91         },
  92         { LPS_303, "LPS-303", 1,
  93                 {
  94                         /* Channel 1 */
  95                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
  96                 },
  97         },
  98         { LPS_304, "LPS-304", 3,
  99                 {
 100                         /* Channel 1 */
 101                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 102                         /* Channel 2 */
 103                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 104                         /* Channel 3 */
 105                         { { 5, 5, 0.0 }, { 0.005, 3, 0.001 } },
 106                 },
 107         },
 108         { LPS_305, "LPS-305", 3,
 109                 {
 110                         /* Channel 1 */
 111                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 112                         /* Channel 2 */
 113                         { { 0, 32, 0.01 }, { 0.005, 3, 0.001 } },
 114                         /* Channel 3 */
 115                         { { 3.3, 5, 1.7 }, { 0.005, 3, 0.001 } },
 116                 },
 117         },
 118 };
 119
 120 /** Send command to device with va_list. */
 121 SR_PRIV int lps_send_va(struct sr_serial_dev_inst *serial, const char *fmt, va_list args)
 122 {
 123         int retc;
 124         char auxfmt[LINELEN_MAX];
 125         char buf[LINELEN_MAX];
 126
 127         snprintf(auxfmt, sizeof(auxfmt), "%s\r\n", fmt);
 128         vsnprintf(buf, sizeof(buf), auxfmt, args);
 129
 130         sr_spew("lps_send_va: \"%s\"", buf);
 131
 132         retc = serial_write_blocking(serial, buf, strlen(buf),
 133                         serial_timeout(serial, strlen(buf)));
 134
 135         if (retc < 0)
 136                 return SR_ERR;
 137
 138         return SR_OK;
 139 }
 140
 141 /** Send command to device. */
 142 SR_PRIV int lps_send_req(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 143 {
 144         int retc;
 145         va_list args;
 146
 147         va_start(args, fmt);
 148         retc = lps_send_va(serial, fmt, args);
 149         va_end(args);
 150
 151         return retc;
 152 }
 153
 154 /** Send command and consume simple OK reply. */
 155 SR_PRIV int lps_cmd_ok(struct sr_serial_dev_inst *serial, const char *fmt, ...)
 156 {
 157         int retc;
 158         va_list args;
 159         char buf[LINELEN_MAX];
 160         char *bufptr;
 161         int buflen;
 162
 163         /* Send command */
 164         va_start(args, fmt);
 165         retc = lps_send_va(serial, fmt, args);
 166         va_end(args);
 167
 168         if (retc != SR_OK)
 169                 return SR_ERR;
 170
 171         /* Read reply */
 172         buf[0] = '\0';
 173         bufptr = buf;
 174         buflen = sizeof(buf);
 175         retc = lps_read_reply(serial, &bufptr, &buflen);
 176         if ((retc == SR_OK) && (buflen == 0))
 177                 return SR_OK;
 178
 179         return SR_ERR;
 180 }
 181
 182 /**
 183  * Send command and read reply string.
 184  * @param reply Pointer to buffer of size LINELEN_MAX. Will be NUL-terminated.
 185  */
 186 SR_PRIV int lps_cmd_reply(char *reply, struct sr_serial_dev_inst *serial, const char *fmt, ...)
 187 {
 188         int retc;
 189         va_list args;
 190         char buf[LINELEN_MAX];
 191         char *bufptr;
 192         int buflen;
 193
 194         reply[0] = '\0';
 195
 196         /* Send command */
 197         va_start(args, fmt);
 198         retc = lps_send_va(serial, fmt, args);
 199         va_end(args);
 200
 201         if (retc != SR_OK)
 202                 return SR_ERR;
 203
 204         /* Read reply */
 205         buf[0] = '\0';
 206         bufptr = buf;
 207         buflen = sizeof(buf);
 208         retc = lps_read_reply(serial, &bufptr, &buflen);
 209         if ((retc == SR_OK) && (buflen > 0)) {
 210                 strcpy(reply, buf);
 211                 return SR_OK;
 212         }
 213
 214         return SR_ERR;
 215 }
 216
 217 /** Process integer value returned by STATUS command. */
 218 SR_PRIV int lps_process_status(struct sr_dev_inst *sdi, int stat)
 219 {
 220         struct dev_context *devc;
 221         int tracking_mode;
 222
 223         devc = sdi->priv;
 224
 225         sr_spew("Status: %d", stat);
 226         devc->channel_status[0].cc_mode = (stat & 0x01) != 0;
 227         sr_spew("Channel 1 %s mode", devc->channel_status[0].cc_mode?"CC":"CV");
 228         if (devc->model->num_channels > 1) {
 229                 devc->channel_status[1].cc_mode = (stat & 0x02) != 0;
 230                 sr_spew("Channel 2 %s mode", devc->channel_status[1].cc_mode?"CC":"CV");
 231
 232                 tracking_mode = (stat & 0x0c) >> 2;
 233                 switch (tracking_mode) {
 234                 case 0: devc->tracking_mode = 0;
 235                         break;
 236                 case 2: devc->tracking_mode = 1;
 237                         break;
 238                 case 3: devc->tracking_mode = 2;
 239                         break;
 240                 default:
 241                         sr_err("Illegal channel tracking mode %d!", tracking_mode);
 242                         devc->tracking_mode = 0;
 243                         break;
 244                 }
 245
 246                 sr_spew("Channel tracking: %d", devc->tracking_mode);
 247         }
 248         devc->channel_status[0].output_enabled = devc->channel_status[1].output_enabled = stat&0x040?TRUE:FALSE;
 249         sr_spew("Channel 1%s output: %s", devc->model->num_channels > 1?"+2":"", devc->channel_status[0].output_enabled?"ON":"OFF");
 250         if (devc->model->num_channels > 2) {
 251                 devc->channel_status[2].output_enabled = stat&0x010?TRUE:FALSE;
 252                 devc->channel_status[2].output_voltage_last = stat&0x020?3.3:5;
 253                 sr_spew("Channel 3 output: %s, U=%02f V, overload=%d",
 254                         devc->channel_status[2].output_enabled?"ON":"OFF",
 255                         devc->channel_status[2].output_voltage_last,
 256                         stat&0x080?1:0);
 257         }
 258         sr_spew("Fan=%d, beep=%d, CC output compensated=%d", stat&0x0100?1:0, stat&0x0200?1:0, stat&0x0400?1:0);
 259
 260         return SR_OK;
 261 }
 262
 263 /** Send STATUS commend and process status string. */
 264 SR_PRIV int lps_query_status(struct sr_dev_inst *sdi)
 265 {
 266         char buf[LINELEN_MAX];
 267         int stat, ret;
 268         struct dev_context *devc;
 269
 270         devc = sdi->priv;
 271
 272         devc->req_sent_at = g_get_real_time();
 273
 274         if ((ret = lps_cmd_reply(buf, sdi->conn, "STATUS")) < 0) {
 275                 sr_err("%s: Failed to read status: %s.", __func__,
 276                         sr_strerror(ret));
 277                 return SR_ERR;
 278         }
 279
 280         if (sr_atoi(buf, &stat) != SR_OK)
 281                 return SR_ERR;
 282
 283         return lps_process_status(sdi, stat);
 284 }
 285
 286 static gint64 calc_timeout_ms(gint64 start_us)
 287 {
 288         gint64 result = REQ_TIMEOUT_MS - ((g_get_real_time() - start_us) / 1000);
 289
 290         if (result < 0)
 291                 return 0;
 292
 293         return result;
 294 }
 295
 296 /**
 297  * Read message into buf until "OK" received.
 298  *
 299  * @retval SR_OK Msg received; buf and buflen contain result, if any except OK.
 300  * @retval SR_ERR Error, including timeout.
 301 */
 302 SR_PRIV int lps_read_reply(struct sr_serial_dev_inst *serial, char **buf, int *buflen)
 303 {
 304         int retries;
 305         char buf2[LINELEN_MAX];
 306         char *buf2ptr;
 307         int buf2len;
 308         gint64 timeout_start;
 309
 310         *buf[0] = '\0';
 311
 312         /* Read one line. It is either a data message or "OK". */
 313         timeout_start = g_get_real_time();
 314         buf2len = *buflen;
 315         /* Up to 5 tries because serial_readline() will consume only one CR or LF per
 316          * call, but device sends up to 4 in a row. */
 317         for (retries = 0; retries < 5; retries++) {
 318                 *buflen = buf2len;
 319                 if (serial_readline(serial, buf, buflen, calc_timeout_ms(timeout_start)) != SR_OK)
 320                         return SR_ERR;
 321                 if (!strcmp(*buf, "OK")) { /* We got an OK! */
 322                         *buf[0] = '\0';
 323                         *buflen = 0;
 324                         return SR_OK;
 325                 }
 326                 if (*buflen > 0) /* We got a msg! */
 327                         break;
 328         }
 329
 330         /* A data msg is in buf (possibly ERROR), need to consume "OK". */
 331         buf2[0] = '\0';
 332         buf2ptr = buf2;
 333         for (retries = 0; retries < 5; retries++) {
 334                 buf2len = sizeof(buf2);
 335                 if (serial_readline(serial, &buf2ptr, &buf2len, calc_timeout_ms(timeout_start)) != SR_OK)
 336                         return SR_ERR;
 337
 338                 if (!strcmp(buf2ptr, "OK")) { /* We got an OK! */
 339                         if (!strcmp(*buf, "ERROR")) { /* OK came after msg ERROR! */
 340                                 sr_spew("ERROR found!");
 341                                 *buf[0] = '\0';
 342                                 *buflen = 0;
 343                                 return SR_ERR;
 344                         }
 345                         return SR_OK;
 346                 }
 347         }
 348
 349         return SR_ERR; /* Timeout! */
 350 }
 351
 352 /** Scan for LPS-300 series device. */
 353 static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *options)
 354 {
 355         struct sr_dev_inst *sdi;
 356         struct dev_context *devc;
 357         struct sr_serial_dev_inst *serial;
 358         struct sr_channel *ch;
 359         struct sr_channel_group *cg;
 360         const char *conn, *serialcomm;
 361         int cnt, ret;
 362         gchar buf[LINELEN_MAX];
 363         gchar channel[10];
 364         char *verstr;
 365
 366         sdi = NULL;
 367         devc = NULL;
 368         conn = serialcomm = NULL;
 369
 370         /* Process and check options. */
 371         if (sr_serial_extract_options(options, &conn, &serialcomm) != SR_OK)
 372                 return NULL;
 373         if (!serialcomm)
 374                 serialcomm = SERIALCOMM;
 375
 376         /* Init serial port. */
 377         serial = sr_serial_dev_inst_new(conn, serialcomm);
 378
 379         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 380                 goto exit_err;
 381
 382         /* Query and verify model string. */
 383         serial_flush(serial);
 384         if (lps_cmd_reply(buf, serial, "MODEL") != SR_OK)
 385                 return NULL;
 386
 387         /* Check model string. */
 388         if (strncmp(buf, "LPS-", 4)) {
 389                 sr_spew("Unknown model code \"%s\"!", buf);
 390                 return NULL;
 391         }
 392
 393         /* Bug in device FW 1.17, model number is empty, so this can't work with this FW! */
 394         if (modelid == LPS_UNKNOWN) {
 395                 g_strstrip(buf);
 396                 for (cnt = LPS_301; cnt <= LPS_305; cnt++) {
 397                         if (!strcmp(buf, models[cnt].modelstr)) {
 398                                 modelid = cnt;
 399                                 break;
 400                         }
 401                 }
 402                 if (modelid == LPS_UNKNOWN) {
 403                         sr_err("Unable to detect model from model string '%s'!", buf);
 404                         return NULL;
 405                 }
 406         }
 407
 408         /* Query version */
 409         verstr = NULL;
 410         if ((ret = lps_cmd_reply(buf, serial, "VERSION")) == SR_OK) {
 411                 if (strncmp(buf, "Ver-", 4)) {
 412                         sr_spew("Version string %s not recognized.", buf);
 413                         goto exit_err;
 414                 }
 415
 416                 g_strstrip(buf);
 417                 verstr = buf + 4;
 418         }
 419         else /* Bug in device FW 1.17: Querying version string fails while output is active.
 420                 Therefore just print an error message, but do not exit with error. */
 421                 sr_err("Failed to query for hardware version: %s.",
 422                         sr_strerror(ret));
 423
 424         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 425         sdi->status = SR_ST_INACTIVE;
 426         sdi->vendor = g_strdup(VENDOR_MOTECH);
 427         sdi->model = g_strdup(models[modelid].modelstr);
 428         sdi->version = g_strdup(verstr);
 429         sdi->inst_type = SR_INST_SERIAL;
 430         sdi->conn = serial;
 431
 432         devc = g_malloc0(sizeof(struct dev_context));
 433         sr_sw_limits_init(&devc->limits);
 434         devc->model = &models[modelid];
 435
 436         sdi->priv = devc;
 437
 438         /* Setup channels and channel groups. */
 439         for (cnt = 0; cnt < models[modelid].num_channels; cnt++) {
 440                 snprintf(channel, sizeof(channel), "CH%d", cnt + 1);
 441                 ch = sr_channel_new(sdi, cnt, SR_CHANNEL_ANALOG, TRUE, channel);
 442
 443                 devc->channel_status[cnt].info = g_slist_append(NULL, ch);
 444
 445                 cg = g_malloc(sizeof(struct sr_channel_group));
 446                 snprintf(channel, sizeof(channel), "CG%d", cnt+1);
 447                 cg->name = g_strdup(channel);
 448                 cg->priv = NULL;
 449                 cg->channels = g_slist_append(NULL, ch);
 450
 451                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 452         }
 453
 454         /* Query status */
 455         if (lps_query_status(sdi) != SR_OK)
 456                 goto exit_err;
 457
 458         serial_close(serial);
 459
 460         return std_scan_complete(drv, g_slist_append(NULL, sdi));
 461
 462 exit_err:
 463         sr_info("%s: Error!", __func__);
 464
 465         if (serial)
 466                 serial_close(serial);
 467         sr_serial_dev_inst_free(serial);
 468         g_free(devc);
 469         sr_dev_inst_free(sdi);
 470
 471         return NULL;
 472 }
 473
 474 /** Scan for LPS-301 device. */
 475 static GSList *scan_lps301(struct sr_dev_driver *di, GSList *options)
 476 {
 477         return do_scan(LPS_301, di, options);
 478 }
 479
 480 static void clear_helper(struct dev_context *devc)
 481 {
 482         int ch_idx;
 483
 484         /* Free channel_status.info (list only, data owned by sdi). */
 485         for (ch_idx = 0; ch_idx < devc->model->num_channels; ch_idx++)
 486                 g_slist_free(devc->channel_status[ch_idx].info);
 487 }
 488
 489 static int dev_clear(const struct sr_dev_driver *di)
 490 {
 491         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 492 }
 493
 494 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 495                 const struct sr_channel_group *cg)
 496 {
 497         struct dev_context *devc;
 498         struct sr_channel *ch;
 499         int ch_idx;
 500
 501         if (!sdi)
 502                 return SR_ERR_ARG;
 503
 504         devc = sdi->priv;
 505
 506         if (!cg) {
 507                 switch (key) {
 508                 case SR_CONF_LIMIT_SAMPLES:
 509                 case SR_CONF_LIMIT_MSEC:
 510                         return sr_sw_limits_config_get(&devc->limits, key, data);
 511                 case SR_CONF_CHANNEL_CONFIG:
 512                         *data = g_variant_new_string(channel_modes[devc->tracking_mode]);
 513                         break;
 514                 default:
 515                         return SR_ERR_NA;
 516                 }
 517         } else {
 518                 /* We only ever have one channel per channel group in this driver. */
 519                 ch = cg->channels->data;
 520                 ch_idx = ch->index;
 521
 522                 switch (key) {
 523                 case SR_CONF_VOLTAGE:
 524                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_last);
 525                         break;
 526                 case SR_CONF_VOLTAGE_TARGET:
 527                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_voltage_max);
 528                         break;
 529                 case SR_CONF_CURRENT:
 530                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_last);
 531                         break;
 532                 case SR_CONF_CURRENT_LIMIT:
 533                         *data = g_variant_new_double(devc->channel_status[ch_idx].output_current_max);
 534                         break;
 535                 case SR_CONF_ENABLED:
 536                         *data = g_variant_new_boolean(devc->channel_status[ch_idx].output_enabled);
 537                         break;
 538                 default:
 539                         return SR_ERR_NA;
 540                 }
 541         }
 542
 543         return SR_OK;
 544 }
 545
 546 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 547                 const struct sr_channel_group *cg)
 548 {
 549         struct dev_context *devc;
 550         struct sr_channel *ch;
 551         gdouble dval;
 552         int ch_idx;
 553         const char *sval;
 554         gboolean bval;
 555         int idx;
 556         gboolean found;
 557
 558         devc = sdi->priv;
 559
 560         /* Cannot change settings while acquisition active, would cause a mess with commands.
 561          * Changing this would be possible, but tricky. */
 562         if (devc->acq_running)
 563                 return SR_ERR_NA;
 564
 565         if (!cg) {
 566                 switch (key) {
 567                 case SR_CONF_LIMIT_MSEC:
 568                 case SR_CONF_LIMIT_SAMPLES:
 569                         return sr_sw_limits_config_set(&devc->limits, key, data);
 570                 case SR_CONF_CHANNEL_CONFIG:
 571                         sval = g_variant_get_string(data, NULL);
 572                         found = FALSE;
 573                         for (idx = 0; idx < (int)ARRAY_SIZE(channel_modes); idx++) {
 574                                 if (!strcmp(sval, channel_modes[idx])) {
 575                                         found = TRUE;
 576                                         if (devc->tracking_mode == idx)
 577                                                 break;  /* Nothing to do! */
 578                                         devc->tracking_mode = idx;
 579                                         if (devc->model->modelid >= LPS_304) /* No use to set anything in the smaller models. */
 580                                                 return lps_cmd_ok(sdi->conn, "TRACK%1d", devc->tracking_mode);
 581                                 }
 582                                 if (devc->model->modelid <= LPS_303) /* Only first setting possible for smaller models. */
 583                                         break;
 584                         }
 585                         if (!found)
 586                                 return SR_ERR_ARG;
 587                         break;
 588                 default:
 589                         return SR_ERR_NA;
 590                 }
 591         } else {
 592                 /* We only ever have one channel per channel group in this driver. */
 593                 ch = cg->channels->data;
 594                 ch_idx = ch->index;
 595
 596                 switch (key) {
 597                 case SR_CONF_VOLTAGE_TARGET:
 598                         dval = g_variant_get_double(data);
 599                         if (dval < 0 || dval > devc->model->channels[ch_idx].voltage[1])
 600                                 return SR_ERR_ARG;
 601                         if (ch_idx == 2) {
 602                                 if (devc->model->modelid < LPS_304)
 603                                         return SR_ERR_ARG;
 604
 605                                 if (fabs(dval - 5.000) <= 0.001)
 606                                         dval = 5.0;
 607                                 else if ((devc->model->modelid >= LPS_305) && (fabs(dval - 3.300) <= 0.001))
 608                                         dval = 3.3;
 609                                 else return SR_ERR_ARG;
 610                         }
 611
 612                         devc->channel_status[ch_idx].output_voltage_max = dval;
 613                         if (ch_idx == 2)
 614                                 return lps_cmd_ok(sdi->conn, "VDD%1.0f", trunc(dval));
 615                         else
 616                                 return lps_cmd_ok(sdi->conn, "VSET%d %05.3f", ch_idx+1, dval);
 617                         break;
 618                 case SR_CONF_CURRENT_LIMIT:
 619                         dval = g_variant_get_double(data);
 620                         if (dval < 0 || dval > devc->model->channels[ch_idx].current[1])
 621                                 return SR_ERR_ARG;
 622                         if (ch_idx == 2) /* No current setting for CH3. */
 623                                 return SR_ERR_NA;
 624                         devc->channel_status[ch_idx].output_current_max = dval;
 625                         return lps_cmd_ok(sdi->conn, "ISET%d %05.4f", ch_idx+1, dval);
 626                         break;
 627                 case SR_CONF_ENABLED:
 628                         bval = g_variant_get_boolean(data);
 629                         if (bval == devc->channel_status[ch_idx].output_enabled) /* Nothing to do. */
 630                                 break;
 631                         devc->channel_status[ch_idx].output_enabled = bval;
 632                         if (ch_idx != 2) { /* Channels 1,2 can be set only together. */
 633                                 devc->channel_status[ch_idx^1].output_enabled = bval;
 634                                 return lps_cmd_ok(sdi->conn, "OUT%1d", (int)bval);
 635                         } else { /* Channel 3: No command to disable output, set voltage to 0 instead. */
 636                                 if (bval)
 637                                         return lps_cmd_ok(sdi->conn, "VDD%1.0f", devc->channel_status[ch_idx].output_voltage_max);
 638                                 else
 639                                         return lps_cmd_ok(sdi->conn, "VDD0");
 640                         }
 641                         break;
 642                 default:
 643                         return SR_ERR_NA;
 644                 }
 645         }
 646
 647         return SR_OK;
 648 }
 649
 650 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 651                 const struct sr_channel_group *cg)
 652 {
 653         struct dev_context *devc;
 654         struct sr_channel *ch;
 655         int ch_idx;
 656
 657         devc = (sdi) ? sdi->priv : NULL;
 658
 659         if (!cg) {
 660                 switch (key) {
 661                 case SR_CONF_SCAN_OPTIONS:
 662                 case SR_CONF_DEVICE_OPTIONS:
 663                         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 664                 case SR_CONF_CHANNEL_CONFIG:
 665                         if (devc->model->modelid <= LPS_303) {
 666                                 /* The 1-channel models. */
 667                                 *data = g_variant_new_strv(channel_modes, 1);
 668                         } else {
 669                                 /* The other models support all modes. */
 670                                 *data = g_variant_new_strv(channel_modes, ARRAY_SIZE(channel_modes));
 671                         }
 672                         return SR_OK;
 673                 default:
 674                         return SR_ERR_NA;
 675                 }
 676         }
 677
 678         /* We only ever have one channel per channel group in this driver. */
 679         ch = cg->channels->data;
 680         ch_idx = ch->index;
 681
 682         switch (key) {
 683         case SR_CONF_DEVICE_OPTIONS:
 684                 if ((ch_idx == 0) || (ch_idx == 1)) /* CH1, CH2 */
 685                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 686                                 devopts_cg_ch12, ARRAY_SIZE(devopts_cg_ch12), sizeof(uint32_t));
 687                 else /* Must be CH3 */
 688                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 689                                 devopts_cg_ch3, ARRAY_SIZE(devopts_cg_ch3), sizeof(uint32_t));
 690                 break;
 691         case SR_CONF_VOLTAGE_TARGET:
 692                 *data = std_gvar_min_max_step_array(devc->model->channels[ch_idx].voltage);
 693                 break;
 694         case SR_CONF_CURRENT_LIMIT:
 695                 *data = std_gvar_min_max_step_array(devc->model->channels[ch_idx].current);
 696                 break;
 697         default:
 698                 return SR_ERR_NA;
 699         }
 700
 701         return SR_OK;
 702 }
 703
 704 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 705 {
 706         struct dev_context *devc;
 707         struct sr_serial_dev_inst *serial;
 708
 709         devc = sdi->priv;
 710
 711         devc->acq_running = TRUE;
 712
 713         serial = sdi->conn;
 714         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 715                         motech_lps_30x_receive_data, (void *)sdi);
 716         std_session_send_df_header(sdi);
 717
 718         sr_sw_limits_acquisition_start(&devc->limits);
 719
 720         devc->acq_req = AQ_NONE;
 721         /* Do not start polling device here, the read function will do it in 50 ms. */
 722
 723         return SR_OK;
 724 }
 725
 726 static struct sr_dev_driver motech_lps_301_driver_info = {
 727         .name = "motech-lps-301",
 728         .longname = "Motech LPS-301",
 729         .api_version = 1,
 730         .init = std_init,
 731         .cleanup = std_cleanup,
 732         .scan = scan_lps301,
 733         .dev_list = std_dev_list,
 734         .dev_clear = dev_clear,
 735         .config_get = config_get,
 736         .config_set = config_set,
 737         .config_list = config_list,
 738         .dev_open = std_serial_dev_open,
 739         .dev_close = std_serial_dev_close,
 740         .dev_acquisition_start = dev_acquisition_start,
 741         .dev_acquisition_stop = std_serial_dev_acquisition_stop,
 742         .context = NULL,
 743 };
 744 SR_REGISTER_DEV_DRIVER(motech_lps_301_driver_info);