hardware/norma-dmm/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
   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 "protocol.h"
  21
  22 static const int32_t hwopts[] = {
  23         SR_CONF_CONN,
  24         SR_CONF_SERIALCOMM,
  25 };
  26
  27 static const int32_t hwcaps[] = {
  28         SR_CONF_MULTIMETER,
  29         SR_CONF_LIMIT_SAMPLES,
  30         SR_CONF_LIMIT_MSEC,
  31         SR_CONF_CONTINUOUS,
  32 };
  33
  34 #define BUF_MAX 50
  35
  36 #define SERIALCOMM "4800/8n1/dtr=1/rts=0/flow=1"
  37
  38 SR_PRIV struct sr_dev_driver norma_dmm_driver_info;
  39 SR_PRIV struct sr_dev_driver siemens_b102x_driver_info;
  40
  41 static const char* get_brandstr(struct sr_dev_driver* drv)
  42 {
  43         if (drv == &norma_dmm_driver_info)
  44                 return "Norma";
  45         else
  46                 return "Siemens";
  47 }
  48
  49 static const char* get_typestr(int type, struct sr_dev_driver* drv)
  50 {
  51         static const char* nameref[5][2] = {
  52                 {"DM910", "B1024"},
  53                 {"DM920", "B1025"},
  54                 {"DM930", "B1026"},
  55                 {"DM940", "B1027"},
  56                 {"DM950", "B1028"}};
  57
  58         if ((type < 1) || (type > 5))
  59                 return "Unknown type!";
  60
  61         return nameref[type-1][(drv == &siemens_b102x_driver_info)];
  62 }
  63
  64 static int init_norma_dmm(struct sr_context *sr_ctx)
  65 {
  66         return std_init(sr_ctx, &norma_dmm_driver_info, LOG_PREFIX);
  67 }
  68
  69 static int init_siemens_b102x(struct sr_context *sr_ctx)
  70 {
  71         return std_init(sr_ctx, &siemens_b102x_driver_info, LOG_PREFIX);
  72 }
  73
  74 static GSList *do_scan(struct sr_dev_driver* drv, GSList *options)
  75 {
  76         struct sr_dev_inst *sdi;
  77         struct drv_context *drvc;
  78         struct dev_context *devc;
  79         struct sr_config *src;
  80         struct sr_channel *ch;
  81         struct sr_serial_dev_inst *serial;
  82         GSList *l, *devices;
  83         int len, cnt;
  84         const char *conn, *serialcomm;
  85         char *buf;
  86         char req[10];
  87         int auxtype;
  88
  89         devices = NULL;
  90         drvc = drv->priv;
  91         drvc->instances = NULL;
  92         conn = serialcomm = NULL;
  93
  94         for (l = options; l; l = l->next) {
  95                 src = l->data;
  96                 switch (src->key) {
  97                 case SR_CONF_CONN:
  98                         conn = g_variant_get_string(src->data, NULL);
  99                         break;
 100                 case SR_CONF_SERIALCOMM:
 101                         serialcomm = g_variant_get_string(src->data, NULL);
 102                         break;
 103                 }
 104         }
 105         if (!conn)
 106                 return NULL;
 107         if (!serialcomm)
 108                 serialcomm = SERIALCOMM;
 109
 110         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 111                 return NULL;
 112
 113         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 114                 return NULL;
 115
 116         serial_flush(serial);
 117
 118         if (!(buf = g_try_malloc(BUF_MAX))) {
 119                 sr_err("Serial buffer malloc failed.");
 120                 return NULL;
 121         }
 122
 123         snprintf(req, sizeof(req), "%s\r\n",
 124                  nmadmm_requests[NMADMM_REQ_IDN].req_str);
 125         for (cnt = 0; cnt < 7; cnt++) {
 126                 if (serial_write(serial, req, strlen(req)) == -1) {
 127                         sr_err("Unable to send identification request: %d %s.",
 128                                errno, strerror(errno));
 129                         return NULL;
 130                 }
 131                 len = BUF_MAX;
 132                 serial_readline(serial, &buf, &len, 1500);
 133                 if (!len)
 134                         continue;
 135                 buf[BUF_MAX - 1] = '\0';
 136
 137                 /* Match ID string, e.g. "1834 065 V1.06,IF V1.02" (DM950) */
 138                 if (g_regex_match_simple("^1834 [^,]*,IF V*", (char *)buf, 0, 0)) {
 139                         auxtype = xgittoint(buf[7]);
 140                         sr_spew("%s %s DMM %s detected!", get_brandstr(drv), get_typestr(auxtype, drv), buf + 9);
 141
 142                         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 143                                                 get_brandstr(drv), get_typestr(auxtype, drv), buf + 9)))
 144                                 return NULL;
 145                         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 146                                 sr_err("Device context malloc failed.");
 147                                 return NULL;
 148                         }
 149                         devc->type = auxtype;
 150                         devc->version = g_strdup(&buf[9]);
 151                         devc->elapsed_msec = g_timer_new();
 152
 153                         sdi->conn = serial;
 154                         sdi->priv = devc;
 155                         sdi->driver = drv;
 156                         if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE,
 157                                 "P1")))
 158                                 return NULL;
 159                         sdi->channels = g_slist_append(sdi->channels, ch);
 160                         drvc->instances = g_slist_append(drvc->instances, sdi);
 161                         devices = g_slist_append(devices, sdi);
 162                         break;
 163                 }
 164
 165                 /*
 166                  * The interface of the DM9x0 contains a cap that needs to
 167                  * charge for up to 10s before the interface works, if not
 168                  * powered externally. Therefore wait a little to improve
 169                  * chances.
 170                  */
 171                 if (cnt == 3) {
 172                         sr_info("Waiting 5s to allow interface to settle.");
 173                         g_usleep(5 * 1000 * 1000);
 174                 }
 175         }
 176
 177         g_free(buf);
 178
 179         serial_close(serial);
 180         if (!devices)
 181                 sr_serial_dev_inst_free(serial);
 182
 183         return devices;
 184 }
 185
 186 static GSList *scan_norma_dmm(GSList *options)
 187 {
 188         return do_scan(&norma_dmm_driver_info, options);
 189 }
 190
 191 static GSList *scan_siemens_b102x(GSList *options)
 192 {
 193         return do_scan(&siemens_b102x_driver_info, options);
 194 }
 195
 196 static GSList *dev_list_norma_dmm(void)
 197 {
 198         return ((struct drv_context *)(norma_dmm_driver_info.priv))->instances;
 199 }
 200
 201 static GSList *dev_list_siemens_b102x(void)
 202 {
 203         return ((struct drv_context *)(siemens_b102x_driver_info.priv))->instances;
 204 }
 205
 206 static int dev_close(struct sr_dev_inst *sdi)
 207 {
 208         struct dev_context *devc;
 209
 210         std_serial_dev_close(sdi);
 211
 212         /* Free dynamically allocated resources. */
 213         if ((devc = sdi->priv) && devc->version) {
 214                 g_free(devc->version);
 215                 devc->version = NULL;
 216                 g_timer_destroy(devc->elapsed_msec);
 217         }
 218
 219         return SR_OK;
 220 }
 221
 222 static int cleanup_norma_dmm(void)
 223 {
 224         return std_dev_clear(&norma_dmm_driver_info, NULL);
 225 }
 226
 227 static int cleanup_siemens_b102x(void)
 228 {
 229         return std_dev_clear(&siemens_b102x_driver_info, NULL);
 230 }
 231
 232 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 233                 const struct sr_channel_group *cg)
 234 {
 235         struct dev_context *devc;
 236
 237         (void)cg;
 238
 239         if (sdi->status != SR_ST_ACTIVE)
 240                 return SR_ERR_DEV_CLOSED;
 241
 242         if (!(devc = sdi->priv)) {
 243                 sr_err("sdi->priv was NULL.");
 244                 return SR_ERR_BUG;
 245         }
 246
 247         switch (key) {
 248         case SR_CONF_LIMIT_MSEC:
 249                 if (g_variant_get_uint64(data) == 0) {
 250                         sr_err("LIMIT_MSEC can't be 0.");
 251                         return SR_ERR;
 252                 }
 253                 devc->limit_msec = g_variant_get_uint64(data);
 254                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 255                        devc->limit_msec);
 256                 break;
 257         case SR_CONF_LIMIT_SAMPLES:
 258                 devc->limit_samples = g_variant_get_uint64(data);
 259                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 260                        devc->limit_samples);
 261                 break;
 262         default:
 263                 return SR_ERR_NA;
 264         }
 265
 266         return SR_OK;
 267 }
 268
 269 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 270                 const struct sr_channel_group *cg)
 271 {
 272         (void)sdi;
 273         (void)cg;
 274
 275         switch (key) {
 276         case SR_CONF_SCAN_OPTIONS:
 277                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 278                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 279                 break;
 280         case SR_CONF_DEVICE_OPTIONS:
 281                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 282                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 283                 break;
 284         default:
 285                 return SR_ERR_NA;
 286         }
 287
 288         return SR_OK;
 289 }
 290
 291 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 292                                     void *cb_data)
 293 {
 294         struct dev_context *devc;
 295         struct sr_serial_dev_inst *serial;
 296
 297         if (!sdi || !cb_data || !(devc = sdi->priv))
 298                 return SR_ERR_BUG;
 299
 300         if (sdi->status != SR_ST_ACTIVE)
 301                 return SR_ERR_DEV_CLOSED;
 302
 303         devc->cb_data = cb_data;
 304
 305         /* Send header packet to the session bus. */
 306         std_session_send_df_header(cb_data, LOG_PREFIX);
 307
 308         /* Start timer, if required. */
 309         if (devc->limit_msec)
 310                 g_timer_start(devc->elapsed_msec);
 311
 312         /* Poll every 100ms, or whenever some data comes in. */
 313         serial = sdi->conn;
 314         serial_source_add(serial, G_IO_IN, 100, norma_dmm_receive_data,
 315                       (void *)sdi);
 316
 317         return SR_OK;
 318 }
 319
 320 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 321 {
 322         struct dev_context *devc;
 323
 324         /* Stop timer, if required. */
 325         if (sdi && (devc = sdi->priv) && devc->limit_msec)
 326                 g_timer_stop(devc->elapsed_msec);
 327
 328         return std_serial_dev_acquisition_stop(sdi, cb_data, dev_close,
 329                         sdi->conn, LOG_PREFIX);
 330 }
 331
 332 SR_PRIV struct sr_dev_driver norma_dmm_driver_info = {
 333         .name = "norma-dmm",
 334         .longname = "Norma DM9x0 DMMs",
 335         .api_version = 1,
 336         .init = init_norma_dmm,
 337         .cleanup = cleanup_norma_dmm,
 338         .scan = scan_norma_dmm,
 339         .dev_list = dev_list_norma_dmm,
 340         .dev_clear = NULL,
 341         .config_get = NULL,
 342         .config_set = config_set,
 343         .config_list = config_list,
 344         .dev_open = std_serial_dev_open,
 345         .dev_close = dev_close,
 346         .dev_acquisition_start = dev_acquisition_start,
 347         .dev_acquisition_stop = dev_acquisition_stop,
 348         .priv = NULL,
 349 };
 350
 351
 352 SR_PRIV struct sr_dev_driver siemens_b102x_driver_info = {
 353         .name = "siemens-b102x",
 354         .longname = "Siemens B102x DMMs",
 355         .api_version = 1,
 356         .init = init_siemens_b102x,
 357         .cleanup = cleanup_siemens_b102x,
 358         .scan = scan_siemens_b102x,
 359         .dev_list = dev_list_siemens_b102x,
 360         .dev_clear = NULL,
 361         .config_get = NULL,
 362         .config_set = config_set,
 363         .config_list = config_list,
 364         .dev_open = std_serial_dev_open,
 365         .dev_close = dev_close,
 366         .dev_acquisition_start = dev_acquisition_start,
 367         .dev_acquisition_stop = dev_acquisition_stop,
 368         .priv = NULL,
 369 };