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 static struct sr_dev_driver norma_dmm_driver_info;
  45 static struct sr_dev_driver siemens_b102x_driver_info;
  46
  47 static const char *get_brandstr(struct sr_dev_driver *drv)
  48 {
  49         return (drv == &norma_dmm_driver_info) ? "Norma" : "Siemens";
  50 }
  51
  52 static const char *get_typestr(int type, struct sr_dev_driver *drv)
  53 {
  54         static const char *nameref[5][2] = {
  55                 {"DM910", "B1024"},
  56                 {"DM920", "B1025"},
  57                 {"DM930", "B1026"},
  58                 {"DM940", "B1027"},
  59                 {"DM950", "B1028"},
  60         };
  61
  62         if ((type < 1) || (type > 5))
  63                 return "Unknown type!";
  64
  65         return nameref[type - 1][(drv == &siemens_b102x_driver_info)];
  66 }
  67
  68 static GSList *scan(struct sr_dev_driver *drv, GSList *options)
  69 {
  70         struct sr_dev_inst *sdi;
  71         struct dev_context *devc;
  72         struct sr_config *src;
  73         struct sr_serial_dev_inst *serial;
  74         GSList *l, *devices;
  75         int len, cnt, auxtype;
  76         const char *conn, *serialcomm;
  77         char *buf;
  78         char req[10];
  79
  80         devices = NULL;
  81         conn = serialcomm = NULL;
  82
  83         for (l = options; l; l = l->next) {
  84                 src = l->data;
  85                 switch (src->key) {
  86                 case SR_CONF_CONN:
  87                         conn = g_variant_get_string(src->data, NULL);
  88                         break;
  89                 case SR_CONF_SERIALCOMM:
  90                         serialcomm = g_variant_get_string(src->data, NULL);
  91                         break;
  92                 }
  93         }
  94         if (!conn)
  95                 return NULL;
  96         if (!serialcomm)
  97                 serialcomm = SERIALCOMM;
  98
  99         serial = sr_serial_dev_inst_new(conn, serialcomm);
 100
 101         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 102                 return NULL;
 103
 104         serial_flush(serial);
 105
 106         buf = g_malloc(BUF_MAX);
 107
 108         snprintf(req, sizeof(req), "%s\r\n",
 109                  nmadmm_requests[NMADMM_REQ_IDN].req_str);
 110         g_usleep(150 * 1000); /* Wait a little to allow serial port to settle. */
 111         for (cnt = 0; cnt < 7; cnt++) {
 112                 if (serial_write_blocking(serial, req, strlen(req),
 113                                 serial_timeout(serial, strlen(req))) < 0) {
 114                         sr_err("Unable to send identification request.");
 115                         return NULL;
 116                 }
 117                 len = BUF_MAX;
 118                 serial_readline(serial, &buf, &len, NMADMM_TIMEOUT_MS);
 119                 if (!len)
 120                         continue;
 121                 buf[BUF_MAX - 1] = '\0';
 122
 123                 /* Match ID string, e.g. "1834 065 V1.06,IF V1.02" (DM950). */
 124                 if (g_regex_match_simple("^1834 [^,]*,IF V*", (char *)buf, 0, 0)) {
 125                         auxtype = xgittoint(buf[7]);
 126                         sr_spew("%s %s DMM %s detected!", get_brandstr(drv), get_typestr(auxtype, drv), buf + 9);
 127
 128                         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 129                         sdi->status = SR_ST_INACTIVE;
 130                         sdi->vendor = g_strdup(get_brandstr(drv));
 131                         sdi->model = g_strdup(get_typestr(auxtype, drv));
 132                         sdi->version = g_strdup(buf + 9);
 133                         devc = g_malloc0(sizeof(struct dev_context));
 134                         sr_sw_limits_init(&devc->limits);
 135                         devc->type = auxtype;
 136                         sdi->conn = serial;
 137                         sdi->priv = devc;
 138                         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
 139                         devices = g_slist_append(devices, sdi);
 140                         break;
 141                 }
 142
 143                 /*
 144                  * The interface of the DM9x0 contains a cap that needs to
 145                  * charge for up to 10s before the interface works, if not
 146                  * powered externally. Therefore wait a little to improve
 147                  * chances.
 148                  */
 149                 if (cnt == 3) {
 150                         sr_info("Waiting 5s to allow interface to settle.");
 151                         g_usleep(5 * 1000 * 1000);
 152                 }
 153         }
 154
 155         g_free(buf);
 156
 157         serial_close(serial);
 158         if (!devices)
 159                 sr_serial_dev_inst_free(serial);
 160
 161         return std_scan_complete(drv, devices);
 162 }
 163
 164 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 165                 const struct sr_channel_group *cg)
 166 {
 167         struct dev_context *devc;
 168
 169         (void)cg;
 170
 171         devc = sdi->priv;
 172
 173         return sr_sw_limits_config_set(&devc->limits, key, data);
 174 }
 175
 176 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 177                 const struct sr_channel_group *cg)
 178 {
 179         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, NULL, devopts);
 180 }
 181
 182 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 183 {
 184         struct dev_context *devc;
 185         struct sr_serial_dev_inst *serial;
 186
 187         devc = sdi->priv;
 188
 189         sr_sw_limits_acquisition_start(&devc->limits);
 190         std_session_send_df_header(sdi);
 191
 192         /* Poll every 100ms, or whenever some data comes in. */
 193         serial = sdi->conn;
 194         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 195                         norma_dmm_receive_data, (void *)sdi);
 196
 197         return SR_OK;
 198 }
 199
 200 static struct sr_dev_driver norma_dmm_driver_info = {
 201         .name = "norma-dmm",
 202         .longname = "Norma DM9x0 DMMs",
 203         .api_version = 1,
 204         .init = std_init,
 205         .cleanup = std_cleanup,
 206         .scan = scan,
 207         .dev_list = std_dev_list,
 208         .dev_clear = std_dev_clear,
 209         .config_get = NULL,
 210         .config_set = config_set,
 211         .config_list = config_list,
 212         .dev_open = std_serial_dev_open,
 213         .dev_close = std_serial_dev_close,
 214         .dev_acquisition_start = dev_acquisition_start,
 215         .dev_acquisition_stop = std_serial_dev_acquisition_stop,
 216         .context = NULL,
 217 };
 218 SR_REGISTER_DEV_DRIVER(norma_dmm_driver_info);
 219
 220 static struct sr_dev_driver siemens_b102x_driver_info = {
 221         .name = "siemens-b102x",
 222         .longname = "Siemens B102x DMMs",
 223         .api_version = 1,
 224         .init = std_init,
 225         .cleanup = std_cleanup,
 226         .scan = scan,
 227         .dev_list = std_dev_list,
 228         .dev_clear = std_dev_clear,
 229         .config_get = NULL,
 230         .config_set = config_set,
 231         .config_list = config_list,
 232         .dev_open = std_serial_dev_open,
 233         .dev_close = std_serial_dev_close,
 234         .dev_acquisition_start = dev_acquisition_start,
 235         .dev_acquisition_stop = std_serial_dev_acquisition_stop,
 236         .context = NULL,
 237 };
 238 SR_REGISTER_DEV_DRIVER(siemens_b102x_driver_info);