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 /** @file
  21  *  Norma DM9x0/Siemens B102x DMMs driver.
  22  *  @internal
  23  */
  24
  25 #include "protocol.h"
  26
  27 static const int32_t hwopts[] = {
  28         SR_CONF_CONN,
  29         SR_CONF_SERIALCOMM,
  30 };
  31
  32 static const int32_t hwcaps[] = {
  33         SR_CONF_MULTIMETER,
  34         SR_CONF_LIMIT_SAMPLES,
  35         SR_CONF_LIMIT_MSEC,
  36         SR_CONF_CONTINUOUS,
  37 };
  38
  39 #define BUF_MAX 50
  40
  41 #define SERIALCOMM "4800/8n1/dtr=1/rts=0/flow=1"
  42
  43 SR_PRIV struct sr_dev_driver norma_dmm_driver_info;
  44 SR_PRIV struct sr_dev_driver siemens_b102x_driver_info;
  45
  46 static const char* get_brandstr(struct sr_dev_driver* drv)
  47 {
  48         if (drv == &norma_dmm_driver_info)
  49                 return "Norma";
  50         else
  51                 return "Siemens";
  52 }
  53
  54 static const char* get_typestr(int type, struct sr_dev_driver* drv)
  55 {
  56         static const char* nameref[5][2] = {
  57                 {"DM910", "B1024"},
  58                 {"DM920", "B1025"},
  59                 {"DM930", "B1026"},
  60                 {"DM940", "B1027"},
  61                 {"DM950", "B1028"}};
  62
  63         if ((type < 1) || (type > 5))
  64                 return "Unknown type!";
  65
  66         return nameref[type-1][(drv == &siemens_b102x_driver_info)];
  67 }
  68
  69 static int init_norma_dmm(struct sr_context *sr_ctx)
  70 {
  71         return std_init(sr_ctx, &norma_dmm_driver_info, LOG_PREFIX);
  72 }
  73
  74 static int init_siemens_b102x(struct sr_context *sr_ctx)
  75 {
  76         return std_init(sr_ctx, &siemens_b102x_driver_info, LOG_PREFIX);
  77 }
  78
  79 static GSList *do_scan(struct sr_dev_driver* drv, GSList *options)
  80 {
  81         struct sr_dev_inst *sdi;
  82         struct drv_context *drvc;
  83         struct dev_context *devc;
  84         struct sr_config *src;
  85         struct sr_channel *ch;
  86         struct sr_serial_dev_inst *serial;
  87         GSList *l, *devices;
  88         int len, cnt;
  89         const char *conn, *serialcomm;
  90         char *buf;
  91         char req[10];
  92         int auxtype;
  93
  94         devices = NULL;
  95         drvc = drv->priv;
  96         drvc->instances = NULL;
  97         conn = serialcomm = NULL;
  98
  99         for (l = options; l; l = l->next) {
 100                 src = l->data;
 101                 switch (src->key) {
 102                 case SR_CONF_CONN:
 103                         conn = g_variant_get_string(src->data, NULL);
 104                         break;
 105                 case SR_CONF_SERIALCOMM:
 106                         serialcomm = g_variant_get_string(src->data, NULL);
 107                         break;
 108                 }
 109         }
 110         if (!conn)
 111                 return NULL;
 112         if (!serialcomm)
 113                 serialcomm = SERIALCOMM;
 114
 115         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 116                 return NULL;
 117
 118         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 119                 return NULL;
 120
 121         serial_flush(serial);
 122
 123         if (!(buf = g_try_malloc(BUF_MAX))) {
 124                 sr_err("Serial buffer malloc failed.");
 125                 return NULL;
 126         }
 127
 128         snprintf(req, sizeof(req), "%s\r\n",
 129                  nmadmm_requests[NMADMM_REQ_IDN].req_str);
 130         g_usleep(150 * 1000); /* Wait a little to allow serial port to settle. */
 131         for (cnt = 0; cnt < 7; cnt++) {
 132                 if (serial_write(serial, req, strlen(req)) == -1) {
 133                         sr_err("Unable to send identification request: %d %s.",
 134                                errno, strerror(errno));
 135                         return NULL;
 136                 }
 137                 len = BUF_MAX;
 138                 serial_readline(serial, &buf, &len, NMADMM_TIMEOUT_MS);
 139                 if (!len)
 140                         continue;
 141                 buf[BUF_MAX - 1] = '\0';
 142
 143                 /* Match ID string, e.g. "1834 065 V1.06,IF V1.02" (DM950) */
 144                 if (g_regex_match_simple("^1834 [^,]*,IF V*", (char *)buf, 0, 0)) {
 145                         auxtype = xgittoint(buf[7]);
 146                         sr_spew("%s %s DMM %s detected!", get_brandstr(drv), get_typestr(auxtype, drv), buf + 9);
 147
 148                         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 149                                                 get_brandstr(drv), get_typestr(auxtype, drv), buf + 9)))
 150                                 return NULL;
 151                         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 152                                 sr_err("Device context malloc failed.");
 153                                 return NULL;
 154                         }
 155                         devc->type = auxtype;
 156                         devc->version = g_strdup(&buf[9]);
 157                         devc->elapsed_msec = g_timer_new();
 158
 159                         sdi->conn = serial;
 160                         sdi->priv = devc;
 161                         sdi->driver = drv;
 162                         if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE,
 163                                 "P1")))
 164                                 return NULL;
 165                         sdi->channels = g_slist_append(sdi->channels, ch);
 166                         drvc->instances = g_slist_append(drvc->instances, sdi);
 167                         devices = g_slist_append(devices, sdi);
 168                         break;
 169                 }
 170
 171                 /*
 172                  * The interface of the DM9x0 contains a cap that needs to
 173                  * charge for up to 10s before the interface works, if not
 174                  * powered externally. Therefore wait a little to improve
 175                  * chances.
 176                  */
 177                 if (cnt == 3) {
 178                         sr_info("Waiting 5s to allow interface to settle.");
 179                         g_usleep(5 * 1000 * 1000);
 180                 }
 181         }
 182
 183         g_free(buf);
 184
 185         serial_close(serial);
 186         if (!devices)
 187                 sr_serial_dev_inst_free(serial);
 188
 189         return devices;
 190 }
 191
 192 static GSList *scan_norma_dmm(GSList *options)
 193 {
 194         return do_scan(&norma_dmm_driver_info, options);
 195 }
 196
 197 static GSList *scan_siemens_b102x(GSList *options)
 198 {
 199         return do_scan(&siemens_b102x_driver_info, options);
 200 }
 201
 202 static GSList *dev_list_norma_dmm(void)
 203 {
 204         return ((struct drv_context *)(norma_dmm_driver_info.priv))->instances;
 205 }
 206
 207 static GSList *dev_list_siemens_b102x(void)
 208 {
 209         return ((struct drv_context *)(siemens_b102x_driver_info.priv))->instances;
 210 }
 211
 212 static int dev_close(struct sr_dev_inst *sdi)
 213 {
 214         struct dev_context *devc;
 215
 216         std_serial_dev_close(sdi);
 217
 218         /* Free dynamically allocated resources. */
 219         if ((devc = sdi->priv) && devc->version) {
 220                 g_free(devc->version);
 221                 devc->version = NULL;
 222                 g_timer_destroy(devc->elapsed_msec);
 223         }
 224
 225         return SR_OK;
 226 }
 227
 228 static int cleanup_norma_dmm(void)
 229 {
 230         return std_dev_clear(&norma_dmm_driver_info, NULL);
 231 }
 232
 233 static int cleanup_siemens_b102x(void)
 234 {
 235         return std_dev_clear(&siemens_b102x_driver_info, NULL);
 236 }
 237
 238 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 239                 const struct sr_channel_group *cg)
 240 {
 241         struct dev_context *devc;
 242
 243         (void)cg;
 244
 245         if (sdi->status != SR_ST_ACTIVE)
 246                 return SR_ERR_DEV_CLOSED;
 247
 248         if (!(devc = sdi->priv)) {
 249                 sr_err("sdi->priv was NULL.");
 250                 return SR_ERR_BUG;
 251         }
 252
 253         switch (key) {
 254         case SR_CONF_LIMIT_MSEC:
 255                 if (g_variant_get_uint64(data) == 0) {
 256                         sr_err("LIMIT_MSEC can't be 0.");
 257                         return SR_ERR;
 258                 }
 259                 devc->limit_msec = g_variant_get_uint64(data);
 260                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 261                        devc->limit_msec);
 262                 break;
 263         case SR_CONF_LIMIT_SAMPLES:
 264                 devc->limit_samples = g_variant_get_uint64(data);
 265                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 266                        devc->limit_samples);
 267                 break;
 268         default:
 269                 return SR_ERR_NA;
 270         }
 271
 272         return SR_OK;
 273 }
 274
 275 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 276                 const struct sr_channel_group *cg)
 277 {
 278         (void)sdi;
 279         (void)cg;
 280
 281         switch (key) {
 282         case SR_CONF_SCAN_OPTIONS:
 283                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 284                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 285                 break;
 286         case SR_CONF_DEVICE_OPTIONS:
 287                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 288                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 289                 break;
 290         default:
 291                 return SR_ERR_NA;
 292         }
 293
 294         return SR_OK;
 295 }
 296
 297 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 298                                     void *cb_data)
 299 {
 300         struct dev_context *devc;
 301         struct sr_serial_dev_inst *serial;
 302
 303         if (!sdi || !cb_data || !(devc = sdi->priv))
 304                 return SR_ERR_BUG;
 305
 306         if (sdi->status != SR_ST_ACTIVE)
 307                 return SR_ERR_DEV_CLOSED;
 308
 309         devc->cb_data = cb_data;
 310
 311         /* Send header packet to the session bus. */
 312         std_session_send_df_header(cb_data, LOG_PREFIX);
 313
 314         /* Start timer, if required. */
 315         if (devc->limit_msec)
 316                 g_timer_start(devc->elapsed_msec);
 317
 318         /* Poll every 100ms, or whenever some data comes in. */
 319         serial = sdi->conn;
 320         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 321                         norma_dmm_receive_data, (void *)sdi);
 322
 323         return SR_OK;
 324 }
 325
 326 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 327 {
 328         struct dev_context *devc;
 329
 330         /* Stop timer, if required. */
 331         if (sdi && (devc = sdi->priv) && devc->limit_msec)
 332                 g_timer_stop(devc->elapsed_msec);
 333
 334         return std_serial_dev_acquisition_stop(sdi, cb_data, dev_close,
 335                         sdi->conn, LOG_PREFIX);
 336 }
 337
 338 SR_PRIV struct sr_dev_driver norma_dmm_driver_info = {
 339         .name = "norma-dmm",
 340         .longname = "Norma DM9x0 DMMs",
 341         .api_version = 1,
 342         .init = init_norma_dmm,
 343         .cleanup = cleanup_norma_dmm,
 344         .scan = scan_norma_dmm,
 345         .dev_list = dev_list_norma_dmm,
 346         .dev_clear = NULL,
 347         .config_get = NULL,
 348         .config_set = config_set,
 349         .config_list = config_list,
 350         .dev_open = std_serial_dev_open,
 351         .dev_close = dev_close,
 352         .dev_acquisition_start = dev_acquisition_start,
 353         .dev_acquisition_stop = dev_acquisition_stop,
 354         .priv = NULL,
 355 };
 356
 357
 358 SR_PRIV struct sr_dev_driver siemens_b102x_driver_info = {
 359         .name = "siemens-b102x",
 360         .longname = "Siemens B102x DMMs",
 361         .api_version = 1,
 362         .init = init_siemens_b102x,
 363         .cleanup = cleanup_siemens_b102x,
 364         .scan = scan_siemens_b102x,
 365         .dev_list = dev_list_siemens_b102x,
 366         .dev_clear = NULL,
 367         .config_get = NULL,
 368         .config_set = config_set,
 369         .config_list = config_list,
 370         .dev_open = std_serial_dev_open,
 371         .dev_close = dev_close,
 372         .dev_acquisition_start = dev_acquisition_start,
 373         .dev_acquisition_stop = dev_acquisition_stop,
 374         .priv = NULL,
 375 };