hardware/fluke-dmm/api.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <glib.h>
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <fcntl.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include "libsigrok.h"
  27 #include "libsigrok-internal.h"
  28 #include "fluke-dmm.h"
  29
  30 static const int hwopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33         0,
  34 };
  35
  36 static const int hwcaps[] = {
  37         SR_CONF_MULTIMETER,
  38         SR_CONF_LIMIT_SAMPLES,
  39         SR_CONF_LIMIT_MSEC,
  40         SR_CONF_CONTINUOUS,
  41         0,
  42 };
  43
  44 SR_PRIV struct sr_dev_driver flukedmm_driver_info;
  45 static struct sr_dev_driver *di = &flukedmm_driver_info;
  46
  47 static char *scan_conn[] = {
  48         /* 287/289 */
  49         "115200/8n1",
  50         /* 187/189 */
  51         "9600/8n1",
  52         /* Scopemeter 190 series */
  53         "1200/8n1",
  54         NULL
  55 };
  56
  57 static const struct flukedmm_profile supported_flukedmm[] = {
  58         { FLUKE_187, "187", 100, 1000 },
  59         { FLUKE_287, "287", 100, 1000 },
  60         { FLUKE_190, "199B", 1000, 3500 },
  61 };
  62
  63
  64 /* Properly close and free all devices. */
  65 static int clear_instances(void)
  66 {
  67         struct sr_dev_inst *sdi;
  68         struct drv_context *drvc;
  69         struct dev_context *devc;
  70         GSList *l;
  71
  72         if (!(drvc = di->priv))
  73                 return SR_OK;
  74
  75         drvc = di->priv;
  76         for (l = drvc->instances; l; l = l->next) {
  77                 if (!(sdi = l->data))
  78                         continue;
  79                 if (!(devc = sdi->priv))
  80                         continue;
  81                 sr_serial_dev_inst_free(devc->serial);
  82                 sr_dev_inst_free(sdi);
  83         }
  84         g_slist_free(drvc->instances);
  85         drvc->instances = NULL;
  86
  87         return SR_OK;
  88 }
  89
  90 static int hw_init(struct sr_context *sr_ctx)
  91 {
  92         return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
  93 }
  94
  95 static GSList *fluke_scan(const char *conn, const char *serialcomm)
  96 {
  97         struct sr_dev_inst *sdi;
  98         struct drv_context *drvc;
  99         struct dev_context *devc;
 100         struct sr_probe *probe;
 101         struct sr_serial_dev_inst *serial;
 102         GSList *devices;
 103         int retry, len, i, s;
 104         char buf[128], *b, **tokens;
 105
 106         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 107                 return NULL;
 108
 109         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 110                 return NULL;
 111
 112         drvc = di->priv;
 113         b = buf;
 114         retry = 0;
 115         devices = NULL;
 116         /* We'll try the discovery sequence three times in case the device
 117          * is not in an idle state when we send ID. */
 118         while (!devices && retry < 3) {
 119                 retry++;
 120                 serial_flush(serial);
 121                 if (serial_write(serial, "ID\r", 3) == -1) {
 122                         sr_err("Unable to send ID string: %s.",
 123                                strerror(errno));
 124                         continue;
 125                 }
 126
 127                 /* Response is first a CMD_ACK byte (ASCII '0' for OK,
 128                  * or '1' to signify an error. */
 129                 len = 128;
 130                 serial_readline(serial, &b, &len, 150);
 131                 if (len != 1)
 132                         continue;
 133                 if (buf[0] != '0')
 134                         continue;
 135
 136                 /* If CMD_ACK was OK, ID string follows. */
 137                 len = 128;
 138                 serial_readline(serial, &b, &len, 850);
 139                 if (len < 10)
 140                         continue;
 141                 if (strcspn(buf, ",") < 15)
 142                         /* Looks like it's comma-separated. */
 143                         tokens = g_strsplit(buf, ",", 3);
 144                 else
 145                         /* Fluke 199B, at least, uses semicolon. */
 146                         tokens = g_strsplit(buf, ";", 3);
 147                 if (!strncmp("FLUKE", tokens[0], 5)
 148                                 && tokens[1] && tokens[2]) {
 149                         for (i = 0; supported_flukedmm[i].model; i++) {
 150                                 if (strcmp(supported_flukedmm[i].modelname, tokens[0] + 6))
 151                                         continue;
 152                                 /* Skip leading spaces in version number. */
 153                                 for (s = 0; tokens[1][s] == ' '; s++);
 154                                 if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Fluke",
 155                                                 tokens[0] + 6, tokens[1] + s)))
 156                                         return NULL;
 157                                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 158                                         sr_err("Device context malloc failed.");
 159                                         return NULL;
 160                                 }
 161                                 devc->profile = &supported_flukedmm[i];
 162                                 devc->serial = serial;
 163                                 sdi->priv = devc;
 164                                 sdi->driver = di;
 165                                 if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
 166                                         return NULL;
 167                                 sdi->probes = g_slist_append(sdi->probes, probe);
 168                                 drvc->instances = g_slist_append(drvc->instances, sdi);
 169                                 devices = g_slist_append(devices, sdi);
 170                                 break;
 171                         }
 172                 }
 173                 g_strfreev(tokens);
 174                 if (devices)
 175                         /* Found one. */
 176                         break;
 177         }
 178         serial_close(serial);
 179         if (!devices)
 180                 sr_serial_dev_inst_free(serial);
 181
 182         return devices;
 183 }
 184
 185 static GSList *hw_scan(GSList *options)
 186 {
 187         struct sr_config *src;
 188         GSList *l, *devices;
 189         int i;
 190         const char *conn, *serialcomm;
 191
 192         conn = serialcomm = NULL;
 193         for (l = options; l; l = l->next) {
 194                 src = l->data;
 195                 switch (src->key) {
 196                 case SR_CONF_CONN:
 197                         conn = src->value;
 198                         break;
 199                 case SR_CONF_SERIALCOMM:
 200                         serialcomm = src->value;
 201                         break;
 202                 }
 203         }
 204         if (!conn)
 205                 return NULL;
 206
 207         if (serialcomm) {
 208                 /* Use the provided comm specs. */
 209                 devices = fluke_scan(conn, serialcomm);
 210         } else {
 211                 for (i = 0; scan_conn[i]; i++) {
 212                         if ((devices = fluke_scan(conn, scan_conn[i])))
 213                                 break;
 214                         /* The Scopemeter 199B, at least, requires this
 215                          * after all the 115k/9.6k confusion. */
 216                         g_usleep(5000);
 217                 }
 218         }
 219
 220         return devices;
 221 }
 222
 223 static GSList *hw_dev_list(void)
 224 {
 225         return ((struct drv_context *)(di->priv))->instances;
 226 }
 227
 228 static int hw_dev_open(struct sr_dev_inst *sdi)
 229 {
 230         struct dev_context *devc;
 231
 232         if (!(devc = sdi->priv)) {
 233                 sr_err("sdi->priv was NULL.");
 234                 return SR_ERR_BUG;
 235         }
 236
 237         if (serial_open(devc->serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 238                 return SR_ERR;
 239
 240         sdi->status = SR_ST_ACTIVE;
 241
 242         return SR_OK;
 243 }
 244
 245 static int hw_dev_close(struct sr_dev_inst *sdi)
 246 {
 247         struct dev_context *devc;
 248
 249         devc = sdi->priv;
 250
 251         if (devc->serial && devc->serial->fd != -1) {
 252                 serial_close(devc->serial);
 253                 sdi->status = SR_ST_INACTIVE;
 254         }
 255
 256         return SR_OK;
 257 }
 258
 259 static int hw_cleanup(void)
 260 {
 261
 262         clear_instances();
 263
 264         return SR_OK;
 265 }
 266
 267 static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
 268 {
 269         struct dev_context *devc;
 270
 271         if (sdi->status != SR_ST_ACTIVE)
 272                 return SR_ERR;
 273
 274         if (!(devc = sdi->priv)) {
 275                 sr_err("sdi->priv was NULL.");
 276                 return SR_ERR_BUG;
 277         }
 278
 279         switch (id) {
 280         case SR_CONF_LIMIT_MSEC:
 281                 /* TODO: not yet implemented */
 282                 if (*(const uint64_t *)value == 0) {
 283                         sr_err("LIMIT_MSEC can't be 0.");
 284                         return SR_ERR;
 285                 }
 286                 devc->limit_msec = *(const uint64_t *)value;
 287                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 288                        devc->limit_msec);
 289                 break;
 290         case SR_CONF_LIMIT_SAMPLES:
 291                 devc->limit_samples = *(const uint64_t *)value;
 292                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 293                        devc->limit_samples);
 294                 break;
 295         default:
 296                 sr_err("Unknown capability: %d.", id);
 297                 return SR_ERR;
 298                 break;
 299         }
 300
 301         return SR_OK;
 302 }
 303
 304 static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
 305 {
 306
 307         (void)sdi;
 308
 309         switch (key) {
 310         case SR_CONF_SCAN_OPTIONS:
 311                 *data = hwopts;
 312                 break;
 313         case SR_CONF_DEVICE_OPTIONS:
 314                 *data = hwcaps;
 315                 break;
 316         default:
 317                 return SR_ERR_ARG;
 318         }
 319
 320         return SR_OK;
 321 }
 322
 323 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 324                 void *cb_data)
 325 {
 326         struct dev_context *devc;
 327
 328         if (!(devc = sdi->priv)) {
 329                 sr_err("sdi->priv was NULL.");
 330                 return SR_ERR_BUG;
 331         }
 332
 333         devc->cb_data = cb_data;
 334
 335         /* Send header packet to the session bus. */
 336         std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
 337
 338         /* Poll every 100ms, or whenever some data comes in. */
 339         sr_source_add(devc->serial->fd, G_IO_IN, 50, fluke_receive_data, (void *)sdi);
 340
 341         if (serial_write(devc->serial, "QM\r", 3) == -1) {
 342                 sr_err("Unable to send QM: %s.", strerror(errno));
 343                 return SR_ERR;
 344         }
 345         devc->cmd_sent_at = g_get_monotonic_time() / 1000;
 346         devc->expect_response = TRUE;
 347
 348         return SR_OK;
 349 }
 350
 351 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 352 {
 353         struct sr_datafeed_packet packet;
 354         struct dev_context *devc;
 355
 356         if (sdi->status != SR_ST_ACTIVE)
 357                 return SR_ERR;
 358
 359         if (!(devc = sdi->priv)) {
 360                 sr_err("sdi->priv was NULL.");
 361                 return SR_ERR_BUG;
 362         }
 363
 364         sr_dbg("Stopping acquisition.");
 365
 366         sr_source_remove(devc->serial->fd);
 367         hw_dev_close((struct sr_dev_inst *)sdi);
 368
 369         /* Send end packet to the session bus. */
 370         sr_dbg("Sending SR_DF_END.");
 371         packet.type = SR_DF_END;
 372         sr_session_send(cb_data, &packet);
 373
 374         return SR_OK;
 375 }
 376
 377 SR_PRIV struct sr_dev_driver flukedmm_driver_info = {
 378         .name = "fluke-dmm",
 379         .longname = "Fluke 18x/28x series DMMs",
 380         .api_version = 1,
 381         .init = hw_init,
 382         .cleanup = hw_cleanup,
 383         .scan = hw_scan,
 384         .dev_list = hw_dev_list,
 385         .dev_clear = clear_instances,
 386         .config_set = config_set,
 387         .config_list = config_list,
 388         .dev_open = hw_dev_open,
 389         .dev_close = hw_dev_close,
 390         .dev_acquisition_start = hw_dev_acquisition_start,
 391         .dev_acquisition_stop = hw_dev_acquisition_stop,
 392         .priv = NULL,
 393 };