src/hardware/atten-pps3xxx/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 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 <config.h>
  21 #include <string.h>
  22 #include "protocol.h"
  23
  24 /*
  25  * The default serial communication settings on the device are 9600
  26  * baud, 9 data bits. The 9th bit isn't actually used, and the vendor
  27  * software uses Mark parity to absorb the extra bit.
  28  *
  29  * Since 9 data bits is not a standard available in POSIX, we use two
  30  * stop bits to skip over the extra bit instead.
  31  */
  32 #define SERIALCOMM "9600/8n2"
  33
  34 static const uint32_t scanopts[] = {
  35         SR_CONF_CONN,
  36         SR_CONF_SERIALCOMM,
  37 };
  38
  39 static const uint32_t drvopts[] = {
  40         SR_CONF_POWER_SUPPLY,
  41 };
  42
  43 static const uint32_t devopts[] = {
  44         SR_CONF_CONTINUOUS,
  45         SR_CONF_CHANNEL_CONFIG | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  46         SR_CONF_OVER_CURRENT_PROTECTION_ENABLED | SR_CONF_GET | SR_CONF_SET,
  47 };
  48
  49 static const uint32_t devopts_cg[] = {
  50         SR_CONF_VOLTAGE | SR_CONF_GET,
  51         SR_CONF_VOLTAGE_TARGET | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  52         SR_CONF_CURRENT | SR_CONF_GET,
  53         SR_CONF_CURRENT_LIMIT | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  54         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  55 };
  56
  57 static const char *channel_modes[] = {
  58         "Independent",
  59         "Series",
  60         "Parallel",
  61 };
  62
  63 static const struct pps_model models[] = {
  64         { PPS_3203T_3S, "PPS3203T-3S",
  65                 CHANMODE_INDEPENDENT | CHANMODE_SERIES | CHANMODE_PARALLEL,
  66                 3,
  67                 {
  68                         /* Channel 1 */
  69                         { { 0, 32, 0.01 }, { 0, 3, 0.001 } },
  70                         /* Channel 2 */
  71                         { { 0, 32, 0.01 }, { 0, 3, 0.001 } },
  72                         /* Channel 3 */
  73                         { { 0, 6, 0.01 }, { 0, 3, 0.001 } },
  74                 },
  75         },
  76 };
  77
  78 static GSList *scan(struct sr_dev_driver *di, GSList *options, int modelid)
  79 {
  80         struct sr_dev_inst *sdi;
  81         struct dev_context *devc;
  82         struct sr_config *src;
  83         struct sr_channel *ch;
  84         struct sr_channel_group *cg;
  85         struct sr_serial_dev_inst *serial;
  86         GSList *l;
  87         const struct pps_model *model;
  88         uint8_t packet[PACKET_SIZE];
  89         unsigned int i;
  90         int delay_ms, ret;
  91         const char *conn, *serialcomm;
  92         char channel[10];
  93
  94         conn = serialcomm = NULL;
  95         for (l = options; l; l = l->next) {
  96                 src = l->data;
  97                 switch (src->key) {
  98                 case SR_CONF_CONN:
  99                         conn = g_variant_get_string(src->data, NULL);
 100                         break;
 101                 case SR_CONF_SERIALCOMM:
 102                         serialcomm = g_variant_get_string(src->data, NULL);
 103                         break;
 104                 }
 105         }
 106         if (!conn)
 107                 return NULL;
 108         if (!serialcomm)
 109                 serialcomm = SERIALCOMM;
 110
 111         serial = sr_serial_dev_inst_new(conn, serialcomm);
 112
 113         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 114                 return NULL;
 115
 116         serial_flush(serial);
 117
 118         /* This is how the vendor software scans for hardware. */
 119         memset(packet, 0, PACKET_SIZE);
 120         packet[0] = 0xaa;
 121         packet[1] = 0xaa;
 122         delay_ms = serial_timeout(serial, PACKET_SIZE);
 123         if (serial_write_blocking(serial, packet, PACKET_SIZE, delay_ms) < PACKET_SIZE) {
 124                 sr_err("Unable to write while probing for hardware.");
 125                 return NULL;
 126         }
 127         /* The device responds with a 24-byte packet when it receives a packet.
 128          * At 9600 baud, 300ms is long enough for it to have arrived. */
 129         g_usleep(300 * 1000);
 130         memset(packet, 0, PACKET_SIZE);
 131         if ((ret = serial_read_nonblocking(serial, packet, PACKET_SIZE)) < 0) {
 132                 sr_err("Unable to read while probing for hardware: %s",
 133                                 sr_strerror(ret));
 134                 return NULL;
 135         }
 136         if (ret != PACKET_SIZE || packet[0] != 0xaa || packet[1] != 0xaa) {
 137                 /* Doesn't look like an Atten PPS. */
 138                 return NULL;
 139         }
 140
 141         model = NULL;
 142         for (i = 0; i < ARRAY_SIZE(models); i++) {
 143                 if (models[i].modelid == modelid) {
 144                         model = &models[i];
 145                         break;
 146                 }
 147         }
 148         if (!model) {
 149                 sr_err("Unknown modelid %d", modelid);
 150                 return NULL;
 151         }
 152
 153         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 154         sdi->status = SR_ST_INACTIVE;
 155         sdi->vendor = g_strdup("Atten");
 156         sdi->model = g_strdup(model->name);
 157         sdi->inst_type = SR_INST_SERIAL;
 158         sdi->conn = serial;
 159         for (i = 0; i < MAX_CHANNELS; i++) {
 160                 snprintf(channel, 10, "CH%d", i + 1);
 161                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel);
 162                 cg = g_malloc(sizeof(struct sr_channel_group));
 163                 cg->name = g_strdup(channel);
 164                 cg->channels = g_slist_append(NULL, ch);
 165                 cg->priv = NULL;
 166                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 167         }
 168
 169         devc = g_malloc0(sizeof(struct dev_context));
 170         devc->model = model;
 171         devc->config = g_malloc0(sizeof(struct per_channel_config) * model->num_channels);
 172         devc->delay_ms = delay_ms;
 173         sdi->priv = devc;
 174
 175         serial_close(serial);
 176
 177         return std_scan_complete(di, g_slist_append(NULL, sdi));
 178 }
 179
 180 static GSList *scan_3203(struct sr_dev_driver *di, GSList *options)
 181 {
 182         return scan(di, options, PPS_3203T_3S);
 183 }
 184
 185 static int config_get(uint32_t key, GVariant **data,
 186         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 187 {
 188         struct dev_context *devc;
 189         struct sr_channel *ch;
 190         int channel;
 191
 192         if (!sdi)
 193                 return SR_ERR_ARG;
 194
 195         devc = sdi->priv;
 196
 197         if (!cg) {
 198                 switch (key) {
 199                 case SR_CONF_CHANNEL_CONFIG:
 200                         *data = g_variant_new_string(channel_modes[devc->channel_mode]);
 201                         break;
 202                 case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 203                         *data = g_variant_new_boolean(devc->over_current_protection);
 204                         break;
 205                 default:
 206                         return SR_ERR_NA;
 207                 }
 208         } else {
 209                 /* We only ever have one channel per channel group in this driver. */
 210                 ch = cg->channels->data;
 211                 channel = ch->index;
 212
 213                 switch (key) {
 214                 case SR_CONF_VOLTAGE:
 215                         *data = g_variant_new_double(devc->config[channel].output_voltage_last);
 216                         break;
 217                 case SR_CONF_VOLTAGE_TARGET:
 218                         *data = g_variant_new_double(devc->config[channel].output_voltage_max);
 219                         break;
 220                 case SR_CONF_CURRENT:
 221                         *data = g_variant_new_double(devc->config[channel].output_current_last);
 222                         break;
 223                 case SR_CONF_CURRENT_LIMIT:
 224                         *data = g_variant_new_double(devc->config[channel].output_current_max);
 225                         break;
 226                 case SR_CONF_ENABLED:
 227                         *data = g_variant_new_boolean(devc->config[channel].output_enabled);
 228                         break;
 229                 default:
 230                         return SR_ERR_NA;
 231                 }
 232         }
 233
 234         return SR_OK;
 235 }
 236
 237 static int config_set(uint32_t key, GVariant *data,
 238         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 239 {
 240         struct dev_context *devc;
 241         struct sr_channel *ch;
 242         gdouble dval;
 243         int channel, ival;
 244         gboolean bval;
 245
 246         devc = sdi->priv;
 247
 248         if (!cg) {
 249                 switch (key) {
 250                 case SR_CONF_CHANNEL_CONFIG:
 251                         if ((ival = std_str_idx(data, ARRAY_AND_SIZE(channel_modes))) < 0)
 252                                 return SR_ERR_ARG;
 253                         if (devc->model->channel_modes && (1 << ival) == 0)
 254                                 return SR_ERR_ARG; /* Not supported on this model. */
 255                         if (ival == devc->channel_mode_set)
 256                                 break; /* Nothing to do. */
 257                         devc->channel_mode_set = ival;
 258                         devc->config_dirty = TRUE;
 259                         break;
 260                 case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 261                         bval = g_variant_get_boolean(data);
 262                         if (bval == devc->over_current_protection_set)
 263                                 break; /* Nothing to do. */
 264                         devc->over_current_protection_set = bval;
 265                         devc->config_dirty = TRUE;
 266                         break;
 267                 default:
 268                         return SR_ERR_NA;
 269                 }
 270         } else {
 271                 /* We only ever have one channel per channel group in this driver. */
 272                 ch = cg->channels->data;
 273                 channel = ch->index;
 274
 275                 switch (key) {
 276                 case SR_CONF_VOLTAGE_TARGET:
 277                         dval = g_variant_get_double(data);
 278                         if (dval < 0 || dval > devc->model->channels[channel].voltage[1])
 279                                 return SR_ERR_ARG;
 280                         devc->config[channel].output_voltage_max = dval;
 281                         devc->config_dirty = TRUE;
 282                         break;
 283                 case SR_CONF_CURRENT_LIMIT:
 284                         dval = g_variant_get_double(data);
 285                         if (dval < 0 || dval > devc->model->channels[channel].current[1])
 286                                 return SR_ERR_ARG;
 287                         devc->config[channel].output_current_max = dval;
 288                         devc->config_dirty = TRUE;
 289                         break;
 290                 case SR_CONF_ENABLED:
 291                         bval = g_variant_get_boolean(data);
 292                         if (bval == devc->config[channel].output_enabled_set)
 293                                 break; /* Nothing to do. */
 294                         devc->config[channel].output_enabled_set = bval;
 295                         devc->config_dirty = TRUE;
 296                         break;
 297                 default:
 298                         return SR_ERR_NA;
 299                 }
 300         }
 301
 302         return SR_OK;
 303 }
 304
 305 static int config_list(uint32_t key, GVariant **data,
 306         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 307 {
 308         struct dev_context *devc;
 309         struct sr_channel *ch;
 310         int channel;
 311
 312         devc = (sdi) ? sdi->priv : NULL;
 313
 314         if (!cg) {
 315                 switch (key) {
 316                 case SR_CONF_SCAN_OPTIONS:
 317                 case SR_CONF_DEVICE_OPTIONS:
 318                         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 319                 case SR_CONF_CHANNEL_CONFIG:
 320                         if (!devc || !devc->model)
 321                                 return SR_ERR_ARG;
 322                         if (devc->model->channel_modes == CHANMODE_INDEPENDENT) {
 323                                 /* The 1-channel models. */
 324                                 *data = g_variant_new_strv(channel_modes, 1);
 325                         } else {
 326                                 /* The other models support all modes. */
 327                                 *data = g_variant_new_strv(ARRAY_AND_SIZE(channel_modes));
 328                         }
 329                         break;
 330                 default:
 331                         return SR_ERR_NA;
 332                 }
 333         } else {
 334                 /* We only ever have one channel per channel group in this driver. */
 335                 ch = cg->channels->data;
 336                 channel = ch->index;
 337
 338                 switch (key) {
 339                 case SR_CONF_DEVICE_OPTIONS:
 340                         *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
 341                         break;
 342                 case SR_CONF_VOLTAGE_TARGET:
 343                         if (!devc || !devc->model)
 344                                 return SR_ERR_ARG;
 345                         *data = std_gvar_min_max_step_array(devc->model->channels[channel].voltage);
 346                         break;
 347                 case SR_CONF_CURRENT_LIMIT:
 348                         if (!devc || !devc->model)
 349                                 return SR_ERR_ARG;
 350                         *data = std_gvar_min_max_step_array(devc->model->channels[channel].current);
 351                         break;
 352                 default:
 353                         return SR_ERR_NA;
 354                 }
 355         }
 356
 357         return SR_OK;
 358 }
 359
 360 static int dev_close(struct sr_dev_inst *sdi)
 361 {
 362         struct dev_context *devc;
 363
 364         devc = sdi->priv;
 365
 366         if (devc->config_dirty)
 367                 /* Some configuration changes were queued up but didn't
 368                  * get sent to the device, likely because we were never
 369                  * in acquisition mode. Send them out now. */
 370                 send_config(sdi);
 371
 372         return std_serial_dev_close(sdi);
 373 }
 374
 375 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 376 {
 377         struct dev_context *devc;
 378         struct sr_serial_dev_inst *serial;
 379         uint8_t packet[PACKET_SIZE];
 380
 381         devc = sdi->priv;
 382         memset(devc->packet, 0x44, PACKET_SIZE);
 383         devc->packet_size = 0;
 384
 385         devc->acquisition_running = TRUE;
 386
 387         serial = sdi->conn;
 388         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 389                         atten_pps3xxx_receive_data, (void *)sdi);
 390         std_session_send_df_header(sdi);
 391
 392         /* Send a "channel" configuration packet now. */
 393         memset(packet, 0, PACKET_SIZE);
 394         packet[0] = 0xaa;
 395         packet[1] = 0xaa;
 396         send_packet(sdi, packet);
 397
 398         return SR_OK;
 399 }
 400
 401 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 402 {
 403         struct dev_context *devc;
 404
 405         devc = sdi->priv;
 406         devc->acquisition_running = FALSE;
 407
 408         return SR_OK;
 409 }
 410
 411 static struct sr_dev_driver atten_pps3203_driver_info = {
 412         .name = "atten-pps3203",
 413         .longname = "Atten PPS3203T-3S",
 414         .api_version = 1,
 415         .init = std_init,
 416         .cleanup = std_cleanup,
 417         .scan = scan_3203,
 418         .dev_list = std_dev_list,
 419         .dev_clear = std_dev_clear,
 420         .config_get = config_get,
 421         .config_set = config_set,
 422         .config_list = config_list,
 423         .dev_open = std_serial_dev_open,
 424         .dev_close = dev_close,
 425         .dev_acquisition_start = dev_acquisition_start,
 426         .dev_acquisition_stop = dev_acquisition_stop,
 427         .context = NULL,
 428 };
 429 SR_REGISTER_DEV_DRIVER(atten_pps3203_driver_info);