hardware/agilent-dmm/api.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2012 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 <glib.h>
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <fcntl.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include "libsigrok.h"
  27 #include "libsigrok-internal.h"
  28 #include "agilent-dmm.h"
  29
  30 static const int hwopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33         0,
  34 };
  35
  36 static const int hwcaps[] = {
  37         SR_CONF_MULTIMETER,
  38         SR_CONF_LIMIT_SAMPLES,
  39         SR_CONF_LIMIT_MSEC,
  40         SR_CONF_CONTINUOUS,
  41         0,
  42 };
  43
  44 extern const struct agdmm_job agdmm_jobs_u123x[];
  45 extern const struct agdmm_recv agdmm_recvs_u123x[];
  46 extern const struct agdmm_job agdmm_jobs_u125x[];
  47 extern const struct agdmm_recv agdmm_recvs_u125x[];
  48
  49 /* This works on all the Agilent U12xxA series, although the
  50  * U127xA can apparently also run at 19200/8n1. */
  51 #define SERIALCOMM "9600/8n1"
  52
  53 static const struct agdmm_profile supported_agdmm[] = {
  54         { AGILENT_U1231A, "U1231A", agdmm_jobs_u123x, agdmm_recvs_u123x },
  55         { AGILENT_U1232A, "U1232A", agdmm_jobs_u123x, agdmm_recvs_u123x },
  56         { AGILENT_U1233A, "U1233A", agdmm_jobs_u123x, agdmm_recvs_u123x },
  57         { AGILENT_U1251A, "U1251A", agdmm_jobs_u125x, agdmm_recvs_u125x },
  58         { AGILENT_U1252A, "U1252A", agdmm_jobs_u125x, agdmm_recvs_u125x },
  59         { AGILENT_U1253A, "U1253A", agdmm_jobs_u125x, agdmm_recvs_u125x },
  60         { 0, NULL, NULL, NULL }
  61 };
  62
  63 SR_PRIV struct sr_dev_driver agdmm_driver_info;
  64 static struct sr_dev_driver *di = &agdmm_driver_info;
  65
  66 /* Properly close and free all devices. */
  67 static int clear_instances(void)
  68 {
  69         struct sr_dev_inst *sdi;
  70         struct drv_context *drvc;
  71         struct dev_context *devc;
  72         GSList *l;
  73
  74         if (!(drvc = di->priv))
  75                 return SR_OK;
  76
  77         drvc = di->priv;
  78         for (l = drvc->instances; l; l = l->next) {
  79                 if (!(sdi = l->data))
  80                         continue;
  81                 if (!(devc = sdi->priv))
  82                         continue;
  83                 sr_serial_dev_inst_free(devc->serial);
  84                 sr_dev_inst_free(sdi);
  85         }
  86         g_slist_free(drvc->instances);
  87         drvc->instances = NULL;
  88
  89         return SR_OK;
  90 }
  91
  92 static int hw_init(struct sr_context *sr_ctx)
  93 {
  94         return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
  95 }
  96
  97 static GSList *hw_scan(GSList *options)
  98 {
  99         struct sr_dev_inst *sdi;
 100         struct drv_context *drvc;
 101         struct dev_context *devc;
 102         struct sr_config *src;
 103         struct sr_probe *probe;
 104         struct sr_serial_dev_inst *serial;
 105         GSList *l, *devices;
 106         int len, i;
 107         const char *conn, *serialcomm;
 108         char *buf, **tokens;
 109
 110         drvc = di->priv;
 111         drvc->instances = NULL;
 112
 113         devices = NULL;
 114         conn = serialcomm = NULL;
 115         for (l = options; l; l = l->next) {
 116                 src = l->data;
 117                 switch (src->key) {
 118                 case SR_CONF_CONN:
 119                         conn = src->value;
 120                         break;
 121                 case SR_CONF_SERIALCOMM:
 122                         serialcomm = src->value;
 123                         break;
 124                 }
 125         }
 126         if (!conn)
 127                 return NULL;
 128         if (!serialcomm)
 129                 serialcomm = SERIALCOMM;
 130
 131         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 132                 return NULL;
 133
 134         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 135                 return NULL;
 136
 137         serial_flush(serial);
 138         if (serial_write(serial, "*IDN?\r\n", 7) == -1) {
 139                 sr_err("Unable to send identification string: %s.",
 140                        strerror(errno));
 141                 return NULL;
 142         }
 143
 144         len = 128;
 145         if (!(buf = g_try_malloc(len))) {
 146                 sr_err("Serial buffer malloc failed.");
 147                 return NULL;
 148         }
 149         serial_readline(serial, &buf, &len, 150);
 150         if (!len)
 151                 return NULL;
 152
 153         tokens = g_strsplit(buf, ",", 4);
 154         if (!strcmp("Agilent Technologies", tokens[0])
 155                         && tokens[2] && tokens[3]) {
 156                 for (i = 0; supported_agdmm[i].model; i++) {
 157                         if (strcmp(supported_agdmm[i].modelname, tokens[1]))
 158                                 continue;
 159                         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, tokens[0],
 160                                         tokens[1], tokens[3])))
 161                                 return NULL;
 162                         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 163                                 sr_err("Device context malloc failed.");
 164                                 return NULL;
 165                         }
 166                         devc->profile = &supported_agdmm[i];
 167                         devc->serial = serial;
 168                         devc->cur_mq = -1;
 169                         sdi->priv = devc;
 170                         sdi->driver = di;
 171                         if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
 172                                 return NULL;
 173                         sdi->probes = g_slist_append(sdi->probes, probe);
 174                         drvc->instances = g_slist_append(drvc->instances, sdi);
 175                         devices = g_slist_append(devices, sdi);
 176                         break;
 177                 }
 178         }
 179         g_strfreev(tokens);
 180         g_free(buf);
 181
 182         serial_close(serial);
 183         if (!devices)
 184                 sr_serial_dev_inst_free(serial);
 185
 186         return devices;
 187 }
 188
 189 static GSList *hw_dev_list(void)
 190 {
 191         return ((struct drv_context *)(di->priv))->instances;
 192 }
 193
 194 static int hw_dev_open(struct sr_dev_inst *sdi)
 195 {
 196         struct dev_context *devc;
 197
 198         if (!(devc = sdi->priv)) {
 199                 sr_err("sdi->priv was NULL.");
 200                 return SR_ERR_BUG;
 201         }
 202
 203         if (serial_open(devc->serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 204                 return SR_ERR;
 205
 206         sdi->status = SR_ST_ACTIVE;
 207
 208         return SR_OK;
 209 }
 210
 211 static int hw_dev_close(struct sr_dev_inst *sdi)
 212 {
 213         struct dev_context *devc;
 214
 215         if (!(devc = sdi->priv)) {
 216                 sr_err("sdi->priv was NULL.");
 217                 return SR_ERR_BUG;
 218         }
 219
 220         if (devc->serial && devc->serial->fd != -1) {
 221                 serial_close(devc->serial);
 222                 sdi->status = SR_ST_INACTIVE;
 223         }
 224
 225         return SR_OK;
 226 }
 227
 228 static int hw_cleanup(void)
 229 {
 230
 231         clear_instances();
 232
 233         return SR_OK;
 234 }
 235
 236 static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
 237 {
 238         struct dev_context *devc;
 239
 240         if (sdi->status != SR_ST_ACTIVE)
 241                 return SR_ERR;
 242
 243         if (!(devc = sdi->priv)) {
 244                 sr_err("sdi->priv was NULL.");
 245                 return SR_ERR_BUG;
 246         }
 247
 248         switch (id) {
 249         case SR_CONF_LIMIT_MSEC:
 250                 /* TODO: not yet implemented */
 251                 if (*(const uint64_t *)value == 0) {
 252                         sr_err("LIMIT_MSEC can't be 0.");
 253                         return SR_ERR;
 254                 }
 255                 devc->limit_msec = *(const uint64_t *)value;
 256                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 257                        devc->limit_msec);
 258                 break;
 259         case SR_CONF_LIMIT_SAMPLES:
 260                 devc->limit_samples = *(const uint64_t *)value;
 261                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 262                        devc->limit_samples);
 263                 break;
 264         default:
 265                 sr_err("Unknown capability: %d.", id);
 266                 return SR_ERR;
 267                 break;
 268         }
 269
 270         return SR_OK;
 271 }
 272
 273 static int config_list(int key, const void **data, const struct sr_dev_inst *sdi)
 274 {
 275
 276         (void)sdi;
 277
 278         switch (key) {
 279         case SR_CONF_SCAN_OPTIONS:
 280                 *data = hwopts;
 281                 break;
 282         case SR_CONF_DEVICE_OPTIONS:
 283                 *data = hwcaps;
 284                 break;
 285         default:
 286                 return SR_ERR_ARG;
 287         }
 288
 289         return SR_OK;
 290 }
 291
 292 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 293                 void *cb_data)
 294 {
 295         struct sr_datafeed_packet packet;
 296         struct sr_datafeed_header header;
 297         struct dev_context *devc;
 298
 299         if (!(devc = sdi->priv)) {
 300                 sr_err("sdi->priv was NULL.");
 301                 return SR_ERR_BUG;
 302         }
 303
 304         sr_dbg("Starting acquisition.");
 305
 306         devc->cb_data = cb_data;
 307
 308         /* Send header packet to the session bus. */
 309         sr_dbg("Sending SR_DF_HEADER.");
 310         packet.type = SR_DF_HEADER;
 311         packet.payload = (uint8_t *)&header;
 312         header.feed_version = 1;
 313         gettimeofday(&header.starttime, NULL);
 314         sr_session_send(devc->cb_data, &packet);
 315
 316         /* Poll every 100ms, or whenever some data comes in. */
 317         sr_source_add(devc->serial->fd, G_IO_IN, 100, agdmm_receive_data, (void *)sdi);
 318
 319         return SR_OK;
 320 }
 321
 322 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 323 {
 324         struct sr_datafeed_packet packet;
 325         struct dev_context *devc;
 326
 327         if (sdi->status != SR_ST_ACTIVE)
 328                 return SR_ERR;
 329
 330         if (!(devc = sdi->priv)) {
 331                 sr_err("sdi->priv was NULL.");
 332                 return SR_ERR_BUG;
 333         }
 334
 335         sr_dbg("Stopping acquisition.");
 336
 337         sr_source_remove(devc->serial->fd);
 338         hw_dev_close((struct sr_dev_inst *)sdi);
 339
 340         /* Send end packet to the session bus. */
 341         sr_dbg("Sending SR_DF_END.");
 342         packet.type = SR_DF_END;
 343         sr_session_send(cb_data, &packet);
 344
 345
 346         return SR_OK;
 347 }
 348
 349 SR_PRIV struct sr_dev_driver agdmm_driver_info = {
 350         .name = "agilent-dmm",
 351         .longname = "Agilent U12xx series DMMs",
 352         .api_version = 1,
 353         .init = hw_init,
 354         .cleanup = hw_cleanup,
 355         .scan = hw_scan,
 356         .dev_list = hw_dev_list,
 357         .dev_clear = clear_instances,
 358         .config_set = config_set,
 359         .config_list = config_list,
 360         .dev_open = hw_dev_open,
 361         .dev_close = hw_dev_close,
 362         .dev_acquisition_start = hw_dev_acquisition_start,
 363         .dev_acquisition_stop = hw_dev_acquisition_stop,
 364         .priv = NULL,
 365 };