hardware/uni-t-dmm/api.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
   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 2 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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include "libsigrok.h"
  24 #include "libsigrok-internal.h"
  25 #include "protocol.h"
  26
  27 #define UNI_T_UT_D04_NEW "1a86.e008"
  28
  29 static const int hwopts[] = {
  30         SR_CONF_CONN,
  31         0,
  32 };
  33
  34 static const int hwcaps[] = {
  35         SR_CONF_MULTIMETER,
  36         SR_CONF_LIMIT_SAMPLES,
  37         SR_CONF_LIMIT_MSEC,
  38         SR_CONF_CONTINUOUS,
  39         0,
  40 };
  41
  42 SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
  43 SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
  44
  45 static struct sr_dev_driver *di_ut61d = &uni_t_ut61d_driver_info;
  46 static struct sr_dev_driver *di_vc820 = &voltcraft_vc820_driver_info;
  47
  48 /* After hw_init() this will point to a device-specific entry (see above). */
  49 static struct sr_dev_driver *di = NULL;
  50
  51 static int clear_instances(void)
  52 {
  53         /* TODO: Use common code later. */
  54
  55         return SR_OK;
  56 }
  57
  58 static int hw_init(struct sr_context *sr_ctx, int dmm)
  59 {
  60         struct drv_context *drvc;
  61
  62         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
  63                 sr_err("Driver context malloc failed.");
  64                 return SR_ERR_MALLOC;
  65         }
  66
  67         if (dmm == UNI_T_UT61D)
  68                 di = di_ut61d;
  69         else if (dmm == VOLTCRAFT_VC820)
  70                 di = di_vc820;
  71         sr_dbg("Selected '%s' subdriver.", di->name);
  72
  73         drvc->sr_ctx = sr_ctx;
  74         di->priv = drvc;
  75
  76         return SR_OK;
  77 }
  78
  79 static int hw_init_ut61d(struct sr_context *sr_ctx)
  80 {
  81         return hw_init(sr_ctx, UNI_T_UT61D);
  82 }
  83
  84 static int hw_init_vc820(struct sr_context *sr_ctx)
  85 {
  86         return hw_init(sr_ctx, VOLTCRAFT_VC820);
  87 }
  88
  89 static GSList *hw_scan(GSList *options)
  90 {
  91         GSList *usb_devices, *devices, *l;
  92         struct sr_dev_inst *sdi;
  93         struct dev_context *devc;
  94         struct drv_context *drvc;
  95         struct sr_usb_dev_inst *usb;
  96         struct sr_config *src;
  97         struct sr_probe *probe;
  98         const char *conn;
  99
 100         (void)options;
 101
 102         drvc = di->priv;
 103
 104         /* USB scan is always authoritative. */
 105         clear_instances();
 106
 107         conn = NULL;
 108         for (l = options; l; l = l->next) {
 109                 src = l->data;
 110                 switch (src->key) {
 111                 case SR_CONF_CONN:
 112                         conn = src->value;
 113                         break;
 114                 }
 115         }
 116         if (!conn)
 117                 conn = UNI_T_UT_D04_NEW;
 118
 119         devices = NULL;
 120         if (!(usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
 121                 g_slist_free_full(usb_devices, g_free);
 122                 return NULL;
 123         }
 124
 125         for (l = usb_devices; l; l = l->next) {
 126                 usb = l->data;
 127
 128                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 129                         sr_err("Device context malloc failed.");
 130                         return NULL;
 131                 }
 132
 133                 if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 134                                 di->longname, NULL, NULL))) {
 135                         sr_err("sr_dev_inst_new returned NULL.");
 136                         return NULL;
 137                 }
 138                 sdi->priv = devc;
 139                 sdi->driver = di;
 140                 if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
 141                         return NULL;
 142                 sdi->probes = g_slist_append(sdi->probes, probe);
 143
 144                 devc->usb = usb;
 145
 146                 drvc->instances = g_slist_append(drvc->instances, sdi);
 147                 devices = g_slist_append(devices, sdi);
 148         }
 149
 150         return devices;
 151 }
 152
 153 static GSList *hw_dev_list(void)
 154 {
 155         struct drv_context *drvc;
 156
 157         drvc = di->priv;
 158
 159         return drvc->instances;
 160 }
 161
 162 static int hw_dev_open(struct sr_dev_inst *sdi)
 163 {
 164         struct drv_context *drvc;
 165         struct dev_context *devc;
 166
 167         drvc = di->priv;
 168         devc = sdi->priv;
 169
 170         return sr_usb_open(drvc->sr_ctx->libusb_ctx, devc->usb);
 171 }
 172
 173 static int hw_dev_close(struct sr_dev_inst *sdi)
 174 {
 175         (void)sdi;
 176
 177         /* TODO */
 178
 179         return SR_OK;
 180 }
 181
 182 static int hw_cleanup(void)
 183 {
 184         clear_instances();
 185
 186         return SR_OK;
 187 }
 188
 189 static int config_get(int id, const void **data, const struct sr_dev_inst *sdi)
 190 {
 191         (void)sdi;
 192
 193         sr_spew("Backend requested info_id %d.", id);
 194
 195         switch (id) {
 196         case SR_DI_HWOPTS:
 197                 *data = hwopts;
 198                 break;
 199         case SR_DI_HWCAPS:
 200                 *data = hwcaps;
 201                 sr_spew("%s: Returning hwcaps.", __func__);
 202                 break;
 203         case SR_DI_SAMPLERATES:
 204                 /* TODO: Get rid of this. */
 205                 *data = NULL;
 206                 sr_spew("%s: Returning samplerates.", __func__);
 207                 return SR_ERR_ARG;
 208                 break;
 209         case SR_DI_CUR_SAMPLERATE:
 210                 /* TODO: Get rid of this. */
 211                 *data = NULL;
 212                 sr_spew("%s: Returning current samplerate.", __func__);
 213                 return SR_ERR_ARG;
 214                 break;
 215         default:
 216                 return SR_ERR_ARG;
 217                 break;
 218         }
 219
 220         return SR_OK;
 221 }
 222
 223 static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
 224 {
 225         struct dev_context *devc;
 226
 227         devc = sdi->priv;
 228
 229         switch (id) {
 230         case SR_CONF_LIMIT_MSEC:
 231                 /* TODO: Not yet implemented. */
 232                 if (*(const uint64_t *)value == 0) {
 233                         sr_err("Time limit cannot be 0.");
 234                         return SR_ERR;
 235                 }
 236                 devc->limit_msec = *(const uint64_t *)value;
 237                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 238                        devc->limit_msec);
 239                 break;
 240         case SR_CONF_LIMIT_SAMPLES:
 241                 if (*(const uint64_t *)value == 0) {
 242                         sr_err("Sample limit cannot be 0.");
 243                         return SR_ERR;
 244                 }
 245                 devc->limit_samples = *(const uint64_t *)value;
 246                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 247                        devc->limit_samples);
 248                 break;
 249         default:
 250                 sr_err("Unknown capability: %d.", id);
 251                 return SR_ERR;
 252                 break;
 253         }
 254
 255         return SR_OK;
 256 }
 257
 258 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 259                                     void *cb_data)
 260 {
 261         struct sr_datafeed_packet packet;
 262         struct sr_datafeed_header header;
 263         struct dev_context *devc;
 264
 265         devc = sdi->priv;
 266
 267         sr_dbg("Starting acquisition.");
 268
 269         devc->cb_data = cb_data;
 270
 271         /* Send header packet to the session bus. */
 272         sr_dbg("Sending SR_DF_HEADER.");
 273         packet.type = SR_DF_HEADER;
 274         packet.payload = (uint8_t *)&header;
 275         header.feed_version = 1;
 276         gettimeofday(&header.starttime, NULL);
 277         sr_session_send(devc->cb_data, &packet);
 278
 279         if (!strcmp(di->name, "uni-t-ut61d")) {
 280                 sr_source_add(0, 0, 10 /* poll_timeout */,
 281                               uni_t_ut61d_receive_data, (void *)sdi);
 282         } else if (!strcmp(di->name, "voltcraft-vc820")) {
 283                 sr_source_add(0, 0, 10 /* poll_timeout */,
 284                               voltcraft_vc820_receive_data, (void *)sdi);
 285         }
 286
 287         return SR_OK;
 288 }
 289
 290 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 291 {
 292         struct sr_datafeed_packet packet;
 293
 294         (void)sdi;
 295
 296         sr_dbg("Stopping acquisition.");
 297
 298         /* Send end packet to the session bus. */
 299         sr_dbg("Sending SR_DF_END.");
 300         packet.type = SR_DF_END;
 301         sr_session_send(cb_data, &packet);
 302
 303         /* TODO? */
 304         sr_source_remove(0);
 305
 306         return SR_OK;
 307 }
 308
 309 SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info = {
 310         .name = "uni-t-ut61d",
 311         .longname = "UNI-T UT61D",
 312         .api_version = 1,
 313         .init = hw_init_ut61d,
 314         .cleanup = hw_cleanup,
 315         .scan = hw_scan,
 316         .dev_list = hw_dev_list,
 317         .dev_clear = clear_instances,
 318         .config_get = config_get,
 319         .config_set = config_set,
 320         .dev_open = hw_dev_open,
 321         .dev_close = hw_dev_close,
 322         .dev_acquisition_start = hw_dev_acquisition_start,
 323         .dev_acquisition_stop = hw_dev_acquisition_stop,
 324         .priv = NULL,
 325 };
 326
 327 SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info = {
 328         .name = "voltcraft-vc820",
 329         .longname = "Voltcraft VC-820",
 330         .api_version = 1,
 331         .init = hw_init_vc820,
 332         .cleanup = hw_cleanup,
 333         .scan = hw_scan,
 334         .dev_list = hw_dev_list,
 335         .dev_clear = clear_instances,
 336         .config_get = config_get,
 337         .config_set = config_set,
 338         .dev_open = hw_dev_open,
 339         .dev_close = hw_dev_close,
 340         .dev_acquisition_start = hw_dev_acquisition_start,
 341         .dev_acquisition_stop = hw_dev_acquisition_stop,
 342         .priv = NULL,
 343 };