src/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 <config.h>
  26 #include "protocol.h"
  27
  28 static const uint32_t scanopts[] = {
  29         SR_CONF_CONN,
  30         SR_CONF_SERIALCOMM,
  31 };
  32
  33 static const uint32_t devopts[] = {
  34         SR_CONF_MULTIMETER,
  35         SR_CONF_CONTINUOUS,
  36         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  37         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  38 };
  39
  40 #define BUF_MAX 50
  41
  42 #define SERIALCOMM "4800/8n1/dtr=1/rts=0/flow=1"
  43
  44 SR_PRIV struct sr_dev_driver norma_dmm_driver_info;
  45 SR_PRIV struct sr_dev_driver siemens_b102x_driver_info;
  46
  47 static const char *get_brandstr(struct sr_dev_driver *drv)
  48 {
  49         if (drv == &norma_dmm_driver_info)
  50                 return "Norma";
  51         else
  52                 return "Siemens";
  53 }
  54
  55 static const char *get_typestr(int type, struct sr_dev_driver *drv)
  56 {
  57         static const char *nameref[5][2] = {
  58                 {"DM910", "B1024"},
  59                 {"DM920", "B1025"},
  60                 {"DM930", "B1026"},
  61                 {"DM940", "B1027"},
  62                 {"DM950", "B1028"}};
  63
  64         if ((type < 1) || (type > 5))
  65                 return "Unknown type!";
  66
  67         return nameref[type-1][(drv == &siemens_b102x_driver_info)];
  68 }
  69
  70 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  71 {
  72         return std_init(sr_ctx, di, LOG_PREFIX);
  73 }
  74
  75 static GSList *scan(struct sr_dev_driver *drv, GSList *options)
  76 {
  77         struct sr_dev_inst *sdi;
  78         struct drv_context *drvc;
  79         struct dev_context *devc;
  80         struct sr_config *src;
  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->context;
  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         serial = sr_serial_dev_inst_new(conn, serialcomm);
 111
 112         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 113                 return NULL;
 114
 115         serial_flush(serial);
 116
 117         buf = g_malloc(BUF_MAX);
 118
 119         snprintf(req, sizeof(req), "%s\r\n",
 120                  nmadmm_requests[NMADMM_REQ_IDN].req_str);
 121         g_usleep(150 * 1000); /* Wait a little to allow serial port to settle. */
 122         for (cnt = 0; cnt < 7; cnt++) {
 123                 if (serial_write_blocking(serial, req, strlen(req),
 124                                 serial_timeout(serial, strlen(req))) < 0) {
 125                         sr_err("Unable to send identification request.");
 126                         return NULL;
 127                 }
 128                 len = BUF_MAX;
 129                 serial_readline(serial, &buf, &len, NMADMM_TIMEOUT_MS);
 130                 if (!len)
 131                         continue;
 132                 buf[BUF_MAX - 1] = '\0';
 133
 134                 /* Match ID string, e.g. "1834 065 V1.06,IF V1.02" (DM950) */
 135                 if (g_regex_match_simple("^1834 [^,]*,IF V*", (char *)buf, 0, 0)) {
 136                         auxtype = xgittoint(buf[7]);
 137                         sr_spew("%s %s DMM %s detected!", get_brandstr(drv), get_typestr(auxtype, drv), buf + 9);
 138
 139                         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 140                         sdi->status = SR_ST_INACTIVE;
 141                         sdi->vendor = g_strdup(get_brandstr(drv));
 142                         sdi->model = g_strdup(get_typestr(auxtype, drv));
 143                         sdi->version = g_strdup(buf + 9);
 144                         devc = g_malloc0(sizeof(struct dev_context));
 145                         devc->type = auxtype;
 146                         devc->version = g_strdup(&buf[9]);
 147                         devc->elapsed_msec = g_timer_new();
 148                         sdi->conn = serial;
 149                         sdi->priv = devc;
 150                         sdi->driver = drv;
 151                         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
 152                         drvc->instances = g_slist_append(drvc->instances, sdi);
 153                         devices = g_slist_append(devices, sdi);
 154                         break;
 155                 }
 156
 157                 /*
 158                  * The interface of the DM9x0 contains a cap that needs to
 159                  * charge for up to 10s before the interface works, if not
 160                  * powered externally. Therefore wait a little to improve
 161                  * chances.
 162                  */
 163                 if (cnt == 3) {
 164                         sr_info("Waiting 5s to allow interface to settle.");
 165                         g_usleep(5 * 1000 * 1000);
 166                 }
 167         }
 168
 169         g_free(buf);
 170
 171         serial_close(serial);
 172         if (!devices)
 173                 sr_serial_dev_inst_free(serial);
 174
 175         return devices;
 176 }
 177
 178 static GSList *dev_list(const struct sr_dev_driver *di)
 179 {
 180         return ((struct drv_context *)(di->context))->instances;
 181 }
 182
 183 static int dev_close(struct sr_dev_inst *sdi)
 184 {
 185         struct dev_context *devc;
 186
 187         std_serial_dev_close(sdi);
 188
 189         /* Free dynamically allocated resources. */
 190         if ((devc = sdi->priv) && devc->version) {
 191                 g_free(devc->version);
 192                 devc->version = NULL;
 193                 g_timer_destroy(devc->elapsed_msec);
 194         }
 195
 196         return SR_OK;
 197 }
 198
 199 static int cleanup(const struct sr_dev_driver *di)
 200 {
 201         return std_dev_clear(di, NULL);
 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
 209         (void)cg;
 210
 211         if (sdi->status != SR_ST_ACTIVE)
 212                 return SR_ERR_DEV_CLOSED;
 213
 214         if (!(devc = sdi->priv)) {
 215                 sr_err("sdi->priv was NULL.");
 216                 return SR_ERR_BUG;
 217         }
 218
 219         switch (key) {
 220         case SR_CONF_LIMIT_MSEC:
 221                 devc->limit_msec = g_variant_get_uint64(data);
 222                 break;
 223         case SR_CONF_LIMIT_SAMPLES:
 224                 devc->limit_samples = g_variant_get_uint64(data);
 225                 break;
 226         default:
 227                 return SR_ERR_NA;
 228         }
 229
 230         return SR_OK;
 231 }
 232
 233 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 234                 const struct sr_channel_group *cg)
 235 {
 236         (void)sdi;
 237         (void)cg;
 238
 239         switch (key) {
 240         case SR_CONF_SCAN_OPTIONS:
 241                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 242                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 243                 break;
 244         case SR_CONF_DEVICE_OPTIONS:
 245                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 246                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 247                 break;
 248         default:
 249                 return SR_ERR_NA;
 250         }
 251
 252         return SR_OK;
 253 }
 254
 255 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 256 {
 257         struct dev_context *devc;
 258         struct sr_serial_dev_inst *serial;
 259
 260         if (!sdi || !cb_data || !(devc = sdi->priv))
 261                 return SR_ERR_BUG;
 262
 263         if (sdi->status != SR_ST_ACTIVE)
 264                 return SR_ERR_DEV_CLOSED;
 265
 266         devc->cb_data = cb_data;
 267
 268         /* Send header packet to the session bus. */
 269         std_session_send_df_header(cb_data, LOG_PREFIX);
 270
 271         /* Start timer, if required. */
 272         if (devc->limit_msec)
 273                 g_timer_start(devc->elapsed_msec);
 274
 275         /* Poll every 100ms, or whenever some data comes in. */
 276         serial = sdi->conn;
 277         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 278                         norma_dmm_receive_data, (void *)sdi);
 279
 280         return SR_OK;
 281 }
 282
 283 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 284 {
 285         struct dev_context *devc;
 286
 287         /* Stop timer, if required. */
 288         if (sdi && (devc = sdi->priv) && devc->limit_msec)
 289                 g_timer_stop(devc->elapsed_msec);
 290
 291         return std_serial_dev_acquisition_stop(sdi, cb_data, dev_close,
 292                         sdi->conn, LOG_PREFIX);
 293 }
 294
 295 SR_PRIV struct sr_dev_driver norma_dmm_driver_info = {
 296         .name = "norma-dmm",
 297         .longname = "Norma DM9x0 DMMs",
 298         .api_version = 1,
 299         .init = init,
 300         .cleanup = cleanup,
 301         .scan = scan,
 302         .dev_list = dev_list,
 303         .dev_clear = NULL,
 304         .config_get = NULL,
 305         .config_set = config_set,
 306         .config_list = config_list,
 307         .dev_open = std_serial_dev_open,
 308         .dev_close = dev_close,
 309         .dev_acquisition_start = dev_acquisition_start,
 310         .dev_acquisition_stop = dev_acquisition_stop,
 311         .context = NULL,
 312 };
 313
 314 SR_PRIV struct sr_dev_driver siemens_b102x_driver_info = {
 315         .name = "siemens-b102x",
 316         .longname = "Siemens B102x DMMs",
 317         .api_version = 1,
 318         .init = init,
 319         .cleanup = cleanup,
 320         .scan = scan,
 321         .dev_list = dev_list,
 322         .dev_clear = NULL,
 323         .config_get = NULL,
 324         .config_set = config_set,
 325         .config_list = config_list,
 326         .dev_open = std_serial_dev_open,
 327         .dev_close = dev_close,
 328         .dev_acquisition_start = dev_acquisition_start,
 329         .dev_acquisition_stop = dev_acquisition_stop,
 330         .context = NULL,
 331 };