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_probe *probe;
  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 (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "SPL")))
 130                                 return NULL;
 131                         sdi->probes = g_slist_append(sdi->probes, probe);
 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         struct drv_context *drvc;
 148
 149         drvc = di->priv;
 150
 151         return drvc->instances;
 152 }
 153
 154 static int dev_clear(void)
 155 {
 156         return std_dev_clear(di, NULL);
 157 }
 158
 159 static int dev_open(struct sr_dev_inst *sdi)
 160 {
 161         struct sr_serial_dev_inst *serial;
 162
 163         serial = sdi->conn;
 164         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 165                 return SR_ERR;
 166
 167         sdi->status = SR_ST_ACTIVE;
 168
 169         return SR_OK;
 170 }
 171
 172 static int dev_close(struct sr_dev_inst *sdi)
 173 {
 174         struct sr_serial_dev_inst *serial;
 175
 176         serial = sdi->conn;
 177         if (serial && serial->fd != -1) {
 178                 serial_close(serial);
 179                 sdi->status = SR_ST_INACTIVE;
 180         }
 181
 182         return SR_OK;
 183 }
 184
 185 static int cleanup(void)
 186 {
 187         return dev_clear();
 188 }
 189
 190 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
 191 {
 192         struct dev_context *devc;
 193         GVariant *range[2];
 194         uint64_t low, high;
 195         int tmp, ret;
 196
 197         if (!sdi)
 198                 return SR_ERR_ARG;
 199
 200         devc = sdi->priv;
 201         ret = SR_OK;
 202         switch (key) {
 203         case SR_CONF_LIMIT_SAMPLES:
 204                 *data = g_variant_new_uint64(devc->limit_samples);
 205                 break;
 206         case SR_CONF_DATALOG:
 207                 if ((ret = cem_dt_885x_recording_get(sdi, &tmp)) == SR_OK)
 208                         *data = g_variant_new_boolean(tmp);
 209                 break;
 210         case SR_CONF_SPL_WEIGHT_FREQ:
 211                 tmp = cem_dt_885x_weight_freq_get(sdi);
 212                 if (tmp == SR_MQFLAG_SPL_FREQ_WEIGHT_A)
 213                         *data = g_variant_new_string("A");
 214                 else if (tmp == SR_MQFLAG_SPL_FREQ_WEIGHT_C)
 215                         *data = g_variant_new_string("C");
 216                 else
 217                         return SR_ERR;
 218                 break;
 219         case SR_CONF_SPL_WEIGHT_TIME:
 220                 tmp = cem_dt_885x_weight_time_get(sdi);
 221                 if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_F)
 222                         *data = g_variant_new_string("F");
 223                 else if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_S)
 224                         *data = g_variant_new_string("S");
 225                 else
 226                         return SR_ERR;
 227                 break;
 228         case SR_CONF_HOLD_MAX:
 229                 if ((ret = cem_dt_885x_holdmode_get(sdi, &tmp)) == SR_OK)
 230                         *data = g_variant_new_boolean(tmp == SR_MQFLAG_MAX);
 231                 break;
 232         case SR_CONF_HOLD_MIN:
 233                 if ((ret = cem_dt_885x_holdmode_get(sdi, &tmp)) == SR_OK)
 234                         *data = g_variant_new_boolean(tmp == SR_MQFLAG_MIN);
 235                 break;
 236         case SR_CONF_SPL_MEASUREMENT_RANGE:
 237                 if ((ret = cem_dt_885x_meas_range_get(sdi, &low, &high)) == SR_OK) {
 238                         range[0] = g_variant_new_uint64(low);
 239                         range[1] = g_variant_new_uint64(high);
 240                         *data = g_variant_new_tuple(range, 2);
 241                 }
 242                 break;
 243         case SR_CONF_POWER_OFF:
 244                 *data = g_variant_new_boolean(FALSE);
 245                 break;
 246         case SR_CONF_DATA_SOURCE:
 247                 if (devc->cur_data_source == DATA_SOURCE_LIVE)
 248                         *data = g_variant_new_string("Live");
 249                 else
 250                         *data = g_variant_new_string("Memory");
 251                 break;
 252         default:
 253                 return SR_ERR_NA;
 254         }
 255
 256         return ret;
 257 }
 258
 259 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
 260 {
 261         struct dev_context *devc;
 262         uint64_t tmp_u64, low, high;
 263         unsigned int i;
 264         int tmp, ret;
 265         const char *tmp_str;
 266
 267         if (sdi->status != SR_ST_ACTIVE)
 268                 return SR_ERR_DEV_CLOSED;
 269
 270         if (!(devc = sdi->priv)) {
 271                 sr_err("sdi->priv was NULL.");
 272                 return SR_ERR_BUG;
 273         }
 274
 275         ret = SR_OK;
 276         switch (key) {
 277         case SR_CONF_LIMIT_SAMPLES:
 278                 tmp_u64 = g_variant_get_uint64(data);
 279                 devc->limit_samples = tmp_u64;
 280                 ret = SR_OK;
 281                 break;
 282         case SR_CONF_DATALOG:
 283                 ret = cem_dt_885x_recording_set(sdi, g_variant_get_boolean(data));
 284                 break;
 285         case SR_CONF_SPL_WEIGHT_FREQ:
 286                 tmp_str = g_variant_get_string(data, NULL);
 287                 if (!strcmp(tmp_str, "A"))
 288                         ret = cem_dt_885x_weight_freq_set(sdi,
 289                                         SR_MQFLAG_SPL_FREQ_WEIGHT_A);
 290                 else if (!strcmp(tmp_str, "C"))
 291                         ret = cem_dt_885x_weight_freq_set(sdi,
 292                                         SR_MQFLAG_SPL_FREQ_WEIGHT_C);
 293                 else
 294                         return SR_ERR_ARG;
 295                 break;
 296         case SR_CONF_SPL_WEIGHT_TIME:
 297                 tmp_str = g_variant_get_string(data, NULL);
 298                 if (!strcmp(tmp_str, "F"))
 299                         ret = cem_dt_885x_weight_time_set(sdi,
 300                                         SR_MQFLAG_SPL_TIME_WEIGHT_F);
 301                 else if (!strcmp(tmp_str, "S"))
 302                         ret = cem_dt_885x_weight_time_set(sdi,
 303                                         SR_MQFLAG_SPL_TIME_WEIGHT_S);
 304                 else
 305                         return SR_ERR_ARG;
 306                 break;
 307         case SR_CONF_HOLD_MAX:
 308                 tmp = g_variant_get_boolean(data) ? SR_MQFLAG_MAX : 0;
 309                 ret = cem_dt_885x_holdmode_set(sdi, tmp);
 310                 break;
 311         case SR_CONF_HOLD_MIN:
 312                 tmp = g_variant_get_boolean(data) ? SR_MQFLAG_MIN : 0;
 313                 ret = cem_dt_885x_holdmode_set(sdi, tmp);
 314                 break;
 315         case SR_CONF_SPL_MEASUREMENT_RANGE:
 316                 g_variant_get(data, "(tt)", &low, &high);
 317                 ret = SR_ERR_ARG;
 318                 for (i = 0; i < ARRAY_SIZE(meas_ranges); i++) {
 319                         if (meas_ranges[i][0] == low && meas_ranges[i][1] == high) {
 320                                 ret = cem_dt_885x_meas_range_set(sdi, low, high);
 321                                 break;
 322                         }
 323                 }
 324                 break;
 325         case SR_CONF_POWER_OFF:
 326                 if (g_variant_get_boolean(data))
 327                         ret = cem_dt_885x_power_off(sdi);
 328                 break;
 329         case SR_CONF_DATA_SOURCE:
 330                 tmp_str = g_variant_get_string(data, NULL);
 331                 if (!strcmp(tmp_str, "Live"))
 332                         devc->cur_data_source = DATA_SOURCE_LIVE;
 333                 else if (!strcmp(tmp_str, "Memory"))
 334                         devc->cur_data_source = DATA_SOURCE_MEMORY;
 335                 else
 336                         return SR_ERR;
 337                 devc->enable_data_source_memory = devc->cur_data_source == DATA_SOURCE_MEMORY;
 338                 break;
 339         default:
 340                 ret = SR_ERR_NA;
 341         }
 342
 343         return ret;
 344 }
 345
 346 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 347 {
 348         GVariant *tuple, *range[2];
 349         GVariantBuilder gvb;
 350         unsigned int i;
 351         int ret;
 352
 353         (void)sdi;
 354
 355         ret = SR_OK;
 356         switch (key) {
 357         case SR_CONF_SCAN_OPTIONS:
 358                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 359                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 360                 break;
 361         case SR_CONF_DEVICE_OPTIONS:
 362                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 363                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 364                 break;
 365         case SR_CONF_SPL_WEIGHT_FREQ:
 366                 *data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
 367                 break;
 368         case SR_CONF_SPL_WEIGHT_TIME:
 369                 *data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
 370                 break;
 371         case SR_CONF_SPL_MEASUREMENT_RANGE:
 372                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 373                 for (i = 0; i < ARRAY_SIZE(meas_ranges); i++) {
 374                         range[0] = g_variant_new_uint64(meas_ranges[i][0]);
 375                         range[1] = g_variant_new_uint64(meas_ranges[i][1]);
 376                         tuple = g_variant_new_tuple(range, 2);
 377                         g_variant_builder_add_value(&gvb, tuple);
 378                 }
 379                 *data = g_variant_builder_end(&gvb);
 380                 break;
 381         case SR_CONF_DATA_SOURCE:
 382                 *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
 383                 break;
 384         default:
 385                 return SR_ERR_NA;
 386         }
 387
 388         return ret;
 389 }
 390
 391 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 392 {
 393         struct dev_context *devc;
 394         struct sr_serial_dev_inst *serial;
 395
 396         if (sdi->status != SR_ST_ACTIVE)
 397                 return SR_ERR_DEV_CLOSED;
 398
 399         if (!(devc = sdi->priv)) {
 400                 sr_err("sdi->priv was NULL.");
 401                 return SR_ERR_BUG;
 402         }
 403
 404         devc->cb_data = cb_data;
 405         devc->state = ST_INIT;
 406         devc->num_samples = 0;
 407         devc->buf_len = 0;
 408
 409         /* Send header packet to the session bus. */
 410         std_session_send_df_header(cb_data, LOG_PREFIX);
 411
 412         /* Poll every 100ms, or whenever some data comes in. */
 413         serial = sdi->conn;
 414         sr_source_add(serial->fd, G_IO_IN, 150, cem_dt_885x_receive_data,
 415                         (void *)sdi);
 416
 417         return SR_OK;
 418 }
 419
 420 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 421 {
 422         (void)cb_data;
 423
 424         if (sdi->status != SR_ST_ACTIVE)
 425                 return SR_ERR_DEV_CLOSED;
 426
 427         return std_dev_acquisition_stop_serial(sdi, cb_data, dev_close,
 428                         sdi->conn, LOG_PREFIX);
 429
 430         return SR_OK;
 431 }
 432
 433 SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info = {
 434         .name = "cem-dt-885x",
 435         .longname = "CEM DT-885x",
 436         .api_version = 1,
 437         .init = init,
 438         .cleanup = cleanup,
 439         .scan = scan,
 440         .dev_list = dev_list,
 441         .dev_clear = dev_clear,
 442         .config_get = config_get,
 443         .config_set = config_set,
 444         .config_list = config_list,
 445         .dev_open = dev_open,
 446         .dev_close = dev_close,
 447         .dev_acquisition_start = dev_acquisition_start,
 448         .dev_acquisition_stop = dev_acquisition_stop,
 449         .priv = NULL,
 450 };