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 <string.h>
  21 #include "protocol.h"
  22
  23 #define SERIALCOMM "9600/8n1"
  24 /* 23ms is the longest interval between tokens. */
  25 #define MAX_SCAN_TIME 25 * 1000
  26
  27 static const int32_t hwopts[] = {
  28         SR_CONF_CONN,
  29 };
  30
  31 static const int32_t hwcaps[] = {
  32         SR_CONF_SOUNDLEVELMETER,
  33         SR_CONF_LIMIT_SAMPLES,
  34         SR_CONF_CONTINUOUS,
  35         SR_CONF_SPL_WEIGHT_FREQ,
  36         SR_CONF_SPL_WEIGHT_TIME,
  37         SR_CONF_SPL_MEASUREMENT_RANGE,
  38         SR_CONF_DATALOG,
  39         SR_CONF_HOLD_MAX,
  40         SR_CONF_HOLD_MIN,
  41         SR_CONF_POWER_OFF,
  42         SR_CONF_DATA_SOURCE,
  43 };
  44
  45 static const char *weight_freq[] = {
  46         "A",
  47         "C",
  48 };
  49
  50 static const char *weight_time[] = {
  51         "F",
  52         "S",
  53 };
  54
  55 static const uint64_t meas_ranges[][2] = {
  56         { 30, 130 },
  57         { 30, 80 },
  58         { 50, 100 },
  59         { 80, 130 },
  60 };
  61
  62 static const char *data_sources[] = {
  63         "Live",
  64         "Memory",
  65 };
  66 SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info;
  67 static struct sr_dev_driver *di = &cem_dt_885x_driver_info;
  68
  69
  70 static int init(struct sr_context *sr_ctx)
  71 {
  72         return std_init(sr_ctx, di, LOG_PREFIX);
  73 }
  74
  75 static GSList *scan(GSList *options)
  76 {
  77         struct drv_context *drvc;
  78         struct dev_context *devc;
  79         struct sr_config *src;
  80         struct sr_serial_dev_inst *serial;
  81         struct sr_dev_inst *sdi;
  82         struct sr_channel *ch;
  83         GSList *l, *devices;
  84         gint64 start;
  85         const char *conn;
  86         unsigned char c;
  87
  88         conn = NULL;
  89         for (l = options; l; l = l->next) {
  90                 src = l->data;
  91                 if (src->key == SR_CONF_CONN)
  92                         conn = g_variant_get_string(src->data, NULL);
  93         }
  94         if (!conn)
  95                 return NULL;
  96
  97         if (!(serial = sr_serial_dev_inst_new(conn, SERIALCOMM)))
  98                 return NULL;
  99
 100         if (serial_open(serial, SERIAL_RDONLY | SERIAL_NONBLOCK) != SR_OK)
 101                 return NULL;
 102
 103         devices = NULL;
 104         drvc = di->priv;
 105         start = g_get_monotonic_time();
 106         while (g_get_monotonic_time() - start < MAX_SCAN_TIME) {
 107                 if (serial_read(serial, &c, 1) == 1 && c == 0xa5) {
 108                         /* Found one. */
 109                         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "CEM",
 110                                         "DT-885x", NULL)))
 111                                 return NULL;
 112
 113                         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 114                                 sr_dbg("Device context malloc failed.");
 115                                 return NULL;
 116                         }
 117                         devc->cur_mqflags = 0;
 118                         devc->recording = -1;
 119                         devc->cur_meas_range = 0;
 120                         devc->cur_data_source = DATA_SOURCE_LIVE;
 121                         devc->enable_data_source_memory = FALSE;
 122
 123                         if (!(sdi->conn = sr_serial_dev_inst_new(conn, SERIALCOMM)))
 124                                 return NULL;
 125
 126                         sdi->inst_type = SR_INST_SERIAL;
 127                         sdi->priv = devc;
 128                         sdi->driver = di;
 129                         if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "SPL")))
 130                                 return NULL;
 131                         sdi->channels = g_slist_append(sdi->channels, ch);
 132                         drvc->instances = g_slist_append(drvc->instances, sdi);
 133                         devices = g_slist_append(devices, sdi);
 134                         break;
 135                 }
 136                 /* It takes about 1ms for a byte to come in. */
 137                 g_usleep(1000);
 138         }
 139
 140         serial_close(serial);
 141
 142         return devices;
 143 }
 144
 145 static GSList *dev_list(void)
 146 {
 147         return ((struct drv_context *)(di->priv))->instances;
 148 }
 149
 150 static int dev_open(struct sr_dev_inst *sdi)
 151 {
 152         struct sr_serial_dev_inst *serial;
 153
 154         serial = sdi->conn;
 155         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 156                 return SR_ERR;
 157
 158         sdi->status = SR_ST_ACTIVE;
 159
 160         return SR_OK;
 161 }
 162
 163 static int cleanup(void)
 164 {
 165         return std_dev_clear(di, NULL);
 166 }
 167
 168 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
 169                 const struct sr_channel_group *cg)
 170 {
 171         struct dev_context *devc;
 172         GVariant *range[2];
 173         uint64_t low, high;
 174         int tmp, ret;
 175
 176         (void)cg;
 177
 178         if (!sdi)
 179                 return SR_ERR_ARG;
 180
 181         devc = sdi->priv;
 182         ret = SR_OK;
 183         switch (key) {
 184         case SR_CONF_LIMIT_SAMPLES:
 185                 *data = g_variant_new_uint64(devc->limit_samples);
 186                 break;
 187         case SR_CONF_DATALOG:
 188                 if ((ret = cem_dt_885x_recording_get(sdi, &tmp)) == SR_OK)
 189                         *data = g_variant_new_boolean(tmp);
 190                 break;
 191         case SR_CONF_SPL_WEIGHT_FREQ:
 192                 tmp = cem_dt_885x_weight_freq_get(sdi);
 193                 if (tmp == SR_MQFLAG_SPL_FREQ_WEIGHT_A)
 194                         *data = g_variant_new_string("A");
 195                 else if (tmp == SR_MQFLAG_SPL_FREQ_WEIGHT_C)
 196                         *data = g_variant_new_string("C");
 197                 else
 198                         return SR_ERR;
 199                 break;
 200         case SR_CONF_SPL_WEIGHT_TIME:
 201                 tmp = cem_dt_885x_weight_time_get(sdi);
 202                 if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_F)
 203                         *data = g_variant_new_string("F");
 204                 else if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_S)
 205                         *data = g_variant_new_string("S");
 206                 else
 207                         return SR_ERR;
 208                 break;
 209         case SR_CONF_HOLD_MAX:
 210                 if ((ret = cem_dt_885x_holdmode_get(sdi, &tmp)) == SR_OK)
 211                         *data = g_variant_new_boolean(tmp == SR_MQFLAG_MAX);
 212                 break;
 213         case SR_CONF_HOLD_MIN:
 214                 if ((ret = cem_dt_885x_holdmode_get(sdi, &tmp)) == SR_OK)
 215                         *data = g_variant_new_boolean(tmp == SR_MQFLAG_MIN);
 216                 break;
 217         case SR_CONF_SPL_MEASUREMENT_RANGE:
 218                 if ((ret = cem_dt_885x_meas_range_get(sdi, &low, &high)) == SR_OK) {
 219                         range[0] = g_variant_new_uint64(low);
 220                         range[1] = g_variant_new_uint64(high);
 221                         *data = g_variant_new_tuple(range, 2);
 222                 }
 223                 break;
 224         case SR_CONF_POWER_OFF:
 225                 *data = g_variant_new_boolean(FALSE);
 226                 break;
 227         case SR_CONF_DATA_SOURCE:
 228                 if (devc->cur_data_source == DATA_SOURCE_LIVE)
 229                         *data = g_variant_new_string("Live");
 230                 else
 231                         *data = g_variant_new_string("Memory");
 232                 break;
 233         default:
 234                 return SR_ERR_NA;
 235         }
 236
 237         return ret;
 238 }
 239
 240 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 241                 const struct sr_channel_group *cg)
 242 {
 243         struct dev_context *devc;
 244         uint64_t tmp_u64, low, high;
 245         unsigned int i;
 246         int tmp, ret;
 247         const char *tmp_str;
 248
 249         (void)cg;
 250
 251         if (sdi->status != SR_ST_ACTIVE)
 252                 return SR_ERR_DEV_CLOSED;
 253
 254         if (!(devc = sdi->priv)) {
 255                 sr_err("sdi->priv was NULL.");
 256                 return SR_ERR_BUG;
 257         }
 258
 259         ret = SR_OK;
 260         switch (key) {
 261         case SR_CONF_LIMIT_SAMPLES:
 262                 tmp_u64 = g_variant_get_uint64(data);
 263                 devc->limit_samples = tmp_u64;
 264                 ret = SR_OK;
 265                 break;
 266         case SR_CONF_DATALOG:
 267                 ret = cem_dt_885x_recording_set(sdi, g_variant_get_boolean(data));
 268                 break;
 269         case SR_CONF_SPL_WEIGHT_FREQ:
 270                 tmp_str = g_variant_get_string(data, NULL);
 271                 if (!strcmp(tmp_str, "A"))
 272                         ret = cem_dt_885x_weight_freq_set(sdi,
 273                                         SR_MQFLAG_SPL_FREQ_WEIGHT_A);
 274                 else if (!strcmp(tmp_str, "C"))
 275                         ret = cem_dt_885x_weight_freq_set(sdi,
 276                                         SR_MQFLAG_SPL_FREQ_WEIGHT_C);
 277                 else
 278                         return SR_ERR_ARG;
 279                 break;
 280         case SR_CONF_SPL_WEIGHT_TIME:
 281                 tmp_str = g_variant_get_string(data, NULL);
 282                 if (!strcmp(tmp_str, "F"))
 283                         ret = cem_dt_885x_weight_time_set(sdi,
 284                                         SR_MQFLAG_SPL_TIME_WEIGHT_F);
 285                 else if (!strcmp(tmp_str, "S"))
 286                         ret = cem_dt_885x_weight_time_set(sdi,
 287                                         SR_MQFLAG_SPL_TIME_WEIGHT_S);
 288                 else
 289                         return SR_ERR_ARG;
 290                 break;
 291         case SR_CONF_HOLD_MAX:
 292                 tmp = g_variant_get_boolean(data) ? SR_MQFLAG_MAX : 0;
 293                 ret = cem_dt_885x_holdmode_set(sdi, tmp);
 294                 break;
 295         case SR_CONF_HOLD_MIN:
 296                 tmp = g_variant_get_boolean(data) ? SR_MQFLAG_MIN : 0;
 297                 ret = cem_dt_885x_holdmode_set(sdi, tmp);
 298                 break;
 299         case SR_CONF_SPL_MEASUREMENT_RANGE:
 300                 g_variant_get(data, "(tt)", &low, &high);
 301                 ret = SR_ERR_ARG;
 302                 for (i = 0; i < ARRAY_SIZE(meas_ranges); i++) {
 303                         if (meas_ranges[i][0] == low && meas_ranges[i][1] == high) {
 304                                 ret = cem_dt_885x_meas_range_set(sdi, low, high);
 305                                 break;
 306                         }
 307                 }
 308                 break;
 309         case SR_CONF_POWER_OFF:
 310                 if (g_variant_get_boolean(data))
 311                         ret = cem_dt_885x_power_off(sdi);
 312                 break;
 313         case SR_CONF_DATA_SOURCE:
 314                 tmp_str = g_variant_get_string(data, NULL);
 315                 if (!strcmp(tmp_str, "Live"))
 316                         devc->cur_data_source = DATA_SOURCE_LIVE;
 317                 else if (!strcmp(tmp_str, "Memory"))
 318                         devc->cur_data_source = DATA_SOURCE_MEMORY;
 319                 else
 320                         return SR_ERR;
 321                 devc->enable_data_source_memory = devc->cur_data_source == DATA_SOURCE_MEMORY;
 322                 break;
 323         default:
 324                 ret = SR_ERR_NA;
 325         }
 326
 327         return ret;
 328 }
 329
 330 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 331                 const struct sr_channel_group *cg)
 332 {
 333         GVariant *tuple, *range[2];
 334         GVariantBuilder gvb;
 335         unsigned int i;
 336         int ret;
 337
 338         (void)sdi;
 339         (void)cg;
 340
 341         ret = SR_OK;
 342         switch (key) {
 343         case SR_CONF_SCAN_OPTIONS:
 344                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 345                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 346                 break;
 347         case SR_CONF_DEVICE_OPTIONS:
 348                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 349                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 350                 break;
 351         case SR_CONF_SPL_WEIGHT_FREQ:
 352                 *data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
 353                 break;
 354         case SR_CONF_SPL_WEIGHT_TIME:
 355                 *data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
 356                 break;
 357         case SR_CONF_SPL_MEASUREMENT_RANGE:
 358                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 359                 for (i = 0; i < ARRAY_SIZE(meas_ranges); i++) {
 360                         range[0] = g_variant_new_uint64(meas_ranges[i][0]);
 361                         range[1] = g_variant_new_uint64(meas_ranges[i][1]);
 362                         tuple = g_variant_new_tuple(range, 2);
 363                         g_variant_builder_add_value(&gvb, tuple);
 364                 }
 365                 *data = g_variant_builder_end(&gvb);
 366                 break;
 367         case SR_CONF_DATA_SOURCE:
 368                 *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
 369                 break;
 370         default:
 371                 return SR_ERR_NA;
 372         }
 373
 374         return ret;
 375 }
 376
 377 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 378 {
 379         struct dev_context *devc;
 380         struct sr_serial_dev_inst *serial;
 381
 382         if (sdi->status != SR_ST_ACTIVE)
 383                 return SR_ERR_DEV_CLOSED;
 384
 385         if (!(devc = sdi->priv)) {
 386                 sr_err("sdi->priv was NULL.");
 387                 return SR_ERR_BUG;
 388         }
 389
 390         devc->cb_data = cb_data;
 391         devc->state = ST_INIT;
 392         devc->num_samples = 0;
 393         devc->buf_len = 0;
 394
 395         /* Send header packet to the session bus. */
 396         std_session_send_df_header(cb_data, LOG_PREFIX);
 397
 398         /* Poll every 100ms, or whenever some data comes in. */
 399         serial = sdi->conn;
 400         serial_source_add(sdi->session, serial, G_IO_IN, 150,
 401                         cem_dt_885x_receive_data, (void *)sdi);
 402
 403         return SR_OK;
 404 }
 405
 406 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 407 {
 408         if (sdi->status != SR_ST_ACTIVE)
 409                 return SR_ERR_DEV_CLOSED;
 410
 411         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 412                         sdi->conn, LOG_PREFIX);
 413 }
 414
 415 SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info = {
 416         .name = "cem-dt-885x",
 417         .longname = "CEM DT-885x",
 418         .api_version = 1,
 419         .init = init,
 420         .cleanup = cleanup,
 421         .scan = scan,
 422         .dev_list = dev_list,
 423         .dev_clear = NULL,
 424         .config_get = config_get,
 425         .config_set = config_set,
 426         .config_list = config_list,
 427         .dev_open = dev_open,
 428         .dev_close = std_serial_dev_close,
 429         .dev_acquisition_start = dev_acquisition_start,
 430         .dev_acquisition_stop = dev_acquisition_stop,
 431         .priv = NULL,
 432 };