src/hardware/cem-dt-885x/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 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 <config.h>
  21 #include <string.h>
  22 #include "protocol.h"
  23
  24 #define SERIALCOMM "9600/8n1"
  25
  26 /* 23ms is the longest interval between tokens. */
  27 #define MAX_SCAN_TIME_US (25 * 1000)
  28
  29 static const uint32_t scanopts[] = {
  30         SR_CONF_CONN,
  31 };
  32
  33 static const uint32_t drvopts[] = {
  34         SR_CONF_SOUNDLEVELMETER,
  35 };
  36
  37 static const uint32_t devopts[] = {
  38         SR_CONF_CONTINUOUS,
  39         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  40         SR_CONF_SPL_WEIGHT_FREQ | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  41         SR_CONF_SPL_WEIGHT_TIME | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  42         SR_CONF_SPL_MEASUREMENT_RANGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  43         SR_CONF_DATALOG | SR_CONF_GET | SR_CONF_SET,
  44         SR_CONF_HOLD_MAX | SR_CONF_GET | SR_CONF_SET,
  45         SR_CONF_HOLD_MIN | SR_CONF_GET | SR_CONF_SET,
  46         SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET,
  47         SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  48 };
  49
  50 static const char *weight_freq[] = {
  51         "A",
  52         "C",
  53 };
  54
  55 static const char *weight_time[] = {
  56         "F",
  57         "S",
  58 };
  59
  60 static const uint64_t meas_ranges[][2] = {
  61         { 30, 130 },
  62         { 30, 80 },
  63         { 50, 100 },
  64         { 80, 130 },
  65 };
  66
  67 static const char *data_sources[] = {
  68         "Live",
  69         "Memory",
  70 };
  71
  72 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  73 {
  74         struct drv_context *drvc;
  75         struct dev_context *devc;
  76         struct sr_config *src;
  77         struct sr_serial_dev_inst *serial;
  78         struct sr_dev_inst *sdi;
  79         GSList *l, *devices;
  80         gint64 start;
  81         const char *conn;
  82         unsigned char c;
  83
  84         conn = NULL;
  85         for (l = options; l; l = l->next) {
  86                 src = l->data;
  87                 if (src->key == SR_CONF_CONN)
  88                         conn = g_variant_get_string(src->data, NULL);
  89         }
  90         if (!conn)
  91                 return NULL;
  92
  93         serial = sr_serial_dev_inst_new(conn, SERIALCOMM);
  94
  95         if (serial_open(serial, SERIAL_RDONLY) != SR_OK)
  96                 return NULL;
  97
  98         devices = NULL;
  99         drvc = di->context;
 100         start = g_get_monotonic_time();
 101         while (g_get_monotonic_time() - start < MAX_SCAN_TIME_US) {
 102                 if (serial_read_nonblocking(serial, &c, 1) == 1 && c == 0xa5) {
 103                         /* Found one. */
 104                         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 105                         sdi->status = SR_ST_INACTIVE;
 106                         sdi->vendor = g_strdup("CEM");
 107                         sdi->model = g_strdup("DT-885x");
 108                         devc = g_malloc0(sizeof(struct dev_context));
 109                         devc->cur_mqflags = 0;
 110                         devc->recording = -1;
 111                         devc->cur_meas_range = 0;
 112                         devc->cur_data_source = DATA_SOURCE_LIVE;
 113                         devc->enable_data_source_memory = FALSE;
 114                         sdi->conn = sr_serial_dev_inst_new(conn, SERIALCOMM);
 115                         sdi->inst_type = SR_INST_SERIAL;
 116                         sdi->priv = devc;
 117                         sdi->driver = di;
 118                         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "SPL");
 119                         drvc->instances = g_slist_append(drvc->instances, sdi);
 120                         devices = g_slist_append(devices, sdi);
 121                         break;
 122                 }
 123                 /* It takes about 1ms for a byte to come in. */
 124                 g_usleep(1000);
 125         }
 126
 127         serial_close(serial);
 128
 129         return devices;
 130 }
 131
 132 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 133                 const struct sr_channel_group *cg)
 134 {
 135         struct dev_context *devc;
 136         GVariant *range[2];
 137         uint64_t low, high;
 138         int tmp, ret;
 139
 140         (void)cg;
 141
 142         if (!sdi)
 143                 return SR_ERR_ARG;
 144
 145         devc = sdi->priv;
 146         ret = SR_OK;
 147         switch (key) {
 148         case SR_CONF_LIMIT_SAMPLES:
 149                 *data = g_variant_new_uint64(devc->limit_samples);
 150                 break;
 151         case SR_CONF_DATALOG:
 152                 if ((ret = cem_dt_885x_recording_get(sdi, &tmp)) == SR_OK)
 153                         *data = g_variant_new_boolean(tmp);
 154                 break;
 155         case SR_CONF_SPL_WEIGHT_FREQ:
 156                 tmp = cem_dt_885x_weight_freq_get(sdi);
 157                 if (tmp == SR_MQFLAG_SPL_FREQ_WEIGHT_A)
 158                         *data = g_variant_new_string("A");
 159                 else if (tmp == SR_MQFLAG_SPL_FREQ_WEIGHT_C)
 160                         *data = g_variant_new_string("C");
 161                 else
 162                         return SR_ERR;
 163                 break;
 164         case SR_CONF_SPL_WEIGHT_TIME:
 165                 tmp = cem_dt_885x_weight_time_get(sdi);
 166                 if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_F)
 167                         *data = g_variant_new_string("F");
 168                 else if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_S)
 169                         *data = g_variant_new_string("S");
 170                 else
 171                         return SR_ERR;
 172                 break;
 173         case SR_CONF_HOLD_MAX:
 174                 if ((ret = cem_dt_885x_holdmode_get(sdi, &tmp)) == SR_OK)
 175                         *data = g_variant_new_boolean(tmp == SR_MQFLAG_MAX);
 176                 break;
 177         case SR_CONF_HOLD_MIN:
 178                 if ((ret = cem_dt_885x_holdmode_get(sdi, &tmp)) == SR_OK)
 179                         *data = g_variant_new_boolean(tmp == SR_MQFLAG_MIN);
 180                 break;
 181         case SR_CONF_SPL_MEASUREMENT_RANGE:
 182                 if ((ret = cem_dt_885x_meas_range_get(sdi, &low, &high)) == SR_OK) {
 183                         range[0] = g_variant_new_uint64(low);
 184                         range[1] = g_variant_new_uint64(high);
 185                         *data = g_variant_new_tuple(range, 2);
 186                 }
 187                 break;
 188         case SR_CONF_POWER_OFF:
 189                 *data = g_variant_new_boolean(FALSE);
 190                 break;
 191         case SR_CONF_DATA_SOURCE:
 192                 if (devc->cur_data_source == DATA_SOURCE_LIVE)
 193                         *data = g_variant_new_string("Live");
 194                 else
 195                         *data = g_variant_new_string("Memory");
 196                 break;
 197         default:
 198                 return SR_ERR_NA;
 199         }
 200
 201         return ret;
 202 }
 203
 204 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 205                 const struct sr_channel_group *cg)
 206 {
 207         struct dev_context *devc;
 208         uint64_t tmp_u64, low, high;
 209         unsigned int i;
 210         int tmp, ret;
 211         const char *tmp_str;
 212
 213         (void)cg;
 214
 215         if (sdi->status != SR_ST_ACTIVE)
 216                 return SR_ERR_DEV_CLOSED;
 217
 218         devc = sdi->priv;
 219
 220         ret = SR_OK;
 221         switch (key) {
 222         case SR_CONF_LIMIT_SAMPLES:
 223                 tmp_u64 = g_variant_get_uint64(data);
 224                 devc->limit_samples = tmp_u64;
 225                 ret = SR_OK;
 226                 break;
 227         case SR_CONF_DATALOG:
 228                 ret = cem_dt_885x_recording_set(sdi, g_variant_get_boolean(data));
 229                 break;
 230         case SR_CONF_SPL_WEIGHT_FREQ:
 231                 tmp_str = g_variant_get_string(data, NULL);
 232                 if (!strcmp(tmp_str, "A"))
 233                         ret = cem_dt_885x_weight_freq_set(sdi,
 234                                         SR_MQFLAG_SPL_FREQ_WEIGHT_A);
 235                 else if (!strcmp(tmp_str, "C"))
 236                         ret = cem_dt_885x_weight_freq_set(sdi,
 237                                         SR_MQFLAG_SPL_FREQ_WEIGHT_C);
 238                 else
 239                         return SR_ERR_ARG;
 240                 break;
 241         case SR_CONF_SPL_WEIGHT_TIME:
 242                 tmp_str = g_variant_get_string(data, NULL);
 243                 if (!strcmp(tmp_str, "F"))
 244                         ret = cem_dt_885x_weight_time_set(sdi,
 245                                         SR_MQFLAG_SPL_TIME_WEIGHT_F);
 246                 else if (!strcmp(tmp_str, "S"))
 247                         ret = cem_dt_885x_weight_time_set(sdi,
 248                                         SR_MQFLAG_SPL_TIME_WEIGHT_S);
 249                 else
 250                         return SR_ERR_ARG;
 251                 break;
 252         case SR_CONF_HOLD_MAX:
 253                 tmp = g_variant_get_boolean(data) ? SR_MQFLAG_MAX : 0;
 254                 ret = cem_dt_885x_holdmode_set(sdi, tmp);
 255                 break;
 256         case SR_CONF_HOLD_MIN:
 257                 tmp = g_variant_get_boolean(data) ? SR_MQFLAG_MIN : 0;
 258                 ret = cem_dt_885x_holdmode_set(sdi, tmp);
 259                 break;
 260         case SR_CONF_SPL_MEASUREMENT_RANGE:
 261                 g_variant_get(data, "(tt)", &low, &high);
 262                 ret = SR_ERR_ARG;
 263                 for (i = 0; i < ARRAY_SIZE(meas_ranges); i++) {
 264                         if (meas_ranges[i][0] == low && meas_ranges[i][1] == high) {
 265                                 ret = cem_dt_885x_meas_range_set(sdi, low, high);
 266                                 break;
 267                         }
 268                 }
 269                 break;
 270         case SR_CONF_POWER_OFF:
 271                 if (g_variant_get_boolean(data))
 272                         ret = cem_dt_885x_power_off(sdi);
 273                 break;
 274         case SR_CONF_DATA_SOURCE:
 275                 tmp_str = g_variant_get_string(data, NULL);
 276                 if (!strcmp(tmp_str, "Live"))
 277                         devc->cur_data_source = DATA_SOURCE_LIVE;
 278                 else if (!strcmp(tmp_str, "Memory"))
 279                         devc->cur_data_source = DATA_SOURCE_MEMORY;
 280                 else
 281                         return SR_ERR;
 282                 devc->enable_data_source_memory = devc->cur_data_source == DATA_SOURCE_MEMORY;
 283                 break;
 284         default:
 285                 ret = SR_ERR_NA;
 286         }
 287
 288         return ret;
 289 }
 290
 291 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 292                 const struct sr_channel_group *cg)
 293 {
 294         GVariant *tuple, *range[2];
 295         GVariantBuilder gvb;
 296         unsigned int i;
 297         int ret;
 298
 299         (void)cg;
 300
 301         ret = SR_OK;
 302         if (!sdi) {
 303                 switch (key) {
 304                 case SR_CONF_SCAN_OPTIONS:
 305                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 306                                         scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 307                         break;
 308                 case SR_CONF_DEVICE_OPTIONS:
 309                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 310                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 311                         break;
 312                 default:
 313                         return SR_ERR_NA;
 314                 }
 315         } else {
 316                 switch (key) {
 317                 case SR_CONF_DEVICE_OPTIONS:
 318                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 319                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 320                         break;
 321                 case SR_CONF_SPL_WEIGHT_FREQ:
 322                         *data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
 323                         break;
 324                 case SR_CONF_SPL_WEIGHT_TIME:
 325                         *data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
 326                         break;
 327                 case SR_CONF_SPL_MEASUREMENT_RANGE:
 328                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 329                         for (i = 0; i < ARRAY_SIZE(meas_ranges); i++) {
 330                                 range[0] = g_variant_new_uint64(meas_ranges[i][0]);
 331                                 range[1] = g_variant_new_uint64(meas_ranges[i][1]);
 332                                 tuple = g_variant_new_tuple(range, 2);
 333                                 g_variant_builder_add_value(&gvb, tuple);
 334                         }
 335                         *data = g_variant_builder_end(&gvb);
 336                         break;
 337                 case SR_CONF_DATA_SOURCE:
 338                         *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
 339                         break;
 340                 default:
 341                         return SR_ERR_NA;
 342                 }
 343         }
 344
 345         return ret;
 346 }
 347
 348 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 349 {
 350         struct dev_context *devc;
 351         struct sr_serial_dev_inst *serial;
 352
 353         if (sdi->status != SR_ST_ACTIVE)
 354                 return SR_ERR_DEV_CLOSED;
 355
 356         devc = sdi->priv;
 357         devc->state = ST_INIT;
 358         devc->num_samples = 0;
 359         devc->buf_len = 0;
 360
 361         std_session_send_df_header(sdi, LOG_PREFIX);
 362
 363         /* Poll every 100ms, or whenever some data comes in. */
 364         serial = sdi->conn;
 365         serial_source_add(sdi->session, serial, G_IO_IN, 150,
 366                         cem_dt_885x_receive_data, (void *)sdi);
 367
 368         return SR_OK;
 369 }
 370
 371 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 372 {
 373         if (sdi->status != SR_ST_ACTIVE)
 374                 return SR_ERR_DEV_CLOSED;
 375
 376         return std_serial_dev_acquisition_stop(sdi, std_serial_dev_close,
 377                         sdi->conn, LOG_PREFIX);
 378 }
 379
 380 SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info = {
 381         .name = "cem-dt-885x",
 382         .longname = "CEM DT-885x",
 383         .api_version = 1,
 384         .init = std_init,
 385         .cleanup = std_cleanup,
 386         .scan = scan,
 387         .dev_list = std_dev_list,
 388         .dev_clear = NULL,
 389         .config_get = config_get,
 390         .config_set = config_set,
 391         .config_list = config_list,
 392         .dev_open = std_serial_dev_open,
 393         .dev_close = std_serial_dev_close,
 394         .dev_acquisition_start = dev_acquisition_start,
 395         .dev_acquisition_stop = dev_acquisition_stop,
 396         .context = NULL,
 397 };