src/hardware/agilent-dmm/api.c

   1 /*
   2  * This file is part of the libsigrok 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 "libsigrok.h"
  26 #include "libsigrok-internal.h"
  27 #include "agilent-dmm.h"
  28
  29 static const uint32_t scanopts[] = {
  30         SR_CONF_CONN,
  31         SR_CONF_SERIALCOMM,
  32 };
  33
  34 static const uint32_t drvopts[] = {
  35         SR_CONF_MULTIMETER,
  36 };
  37
  38 static const uint32_t devopts[] = {
  39         SR_CONF_CONTINUOUS | SR_CONF_SET,
  40         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  41         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  42 };
  43
  44 extern const struct agdmm_job agdmm_jobs_u12xx[];
  45 extern const struct agdmm_recv agdmm_recvs_u123x[];
  46 extern const struct agdmm_recv agdmm_recvs_u124x[];
  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_U1231, "U1231A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  55         { AGILENT_U1232, "U1232A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  56         { AGILENT_U1233, "U1233A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  57
  58         { AGILENT_U1241, "U1241A", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  59         { AGILENT_U1242, "U1242A", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  60         { AGILENT_U1241, "U1241B", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  61         { AGILENT_U1242, "U1242B", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  62
  63         { AGILENT_U1251, "U1251A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  64         { AGILENT_U1252, "U1252A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  65         { AGILENT_U1253, "U1253A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  66         { AGILENT_U1251, "U1251B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  67         { AGILENT_U1252, "U1252B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  68         { AGILENT_U1253, "U1253B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  69         ALL_ZERO
  70 };
  71
  72 SR_PRIV struct sr_dev_driver agdmm_driver_info;
  73
  74 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  75 {
  76         return std_init(sr_ctx, di, LOG_PREFIX);
  77 }
  78
  79 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  80 {
  81         struct sr_dev_inst *sdi;
  82         struct drv_context *drvc;
  83         struct dev_context *devc;
  84         struct sr_config *src;
  85         struct sr_serial_dev_inst *serial;
  86         GSList *l, *devices;
  87         int len, i;
  88         const char *conn, *serialcomm;
  89         char *buf, **tokens;
  90
  91         drvc = di->context;
  92         drvc->instances = NULL;
  93
  94         devices = NULL;
  95         conn = serialcomm = NULL;
  96         for (l = options; l; l = l->next) {
  97                 src = l->data;
  98                 switch (src->key) {
  99                 case SR_CONF_CONN:
 100                         conn = g_variant_get_string(src->data, NULL);
 101                         break;
 102                 case SR_CONF_SERIALCOMM:
 103                         serialcomm = g_variant_get_string(src->data, NULL);
 104                         break;
 105                 }
 106         }
 107         if (!conn)
 108                 return NULL;
 109         if (!serialcomm)
 110                 serialcomm = SERIALCOMM;
 111
 112         serial = sr_serial_dev_inst_new(conn, serialcomm);
 113
 114         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 115                 return NULL;
 116
 117         serial_flush(serial);
 118         if (serial_write_blocking(serial, "*IDN?\r\n", 7, SERIAL_WRITE_TIMEOUT_MS) < 7) {
 119                 sr_err("Unable to send identification string.");
 120                 return NULL;
 121         }
 122
 123         len = 128;
 124         buf = g_malloc(len);
 125         serial_readline(serial, &buf, &len, 250);
 126         if (!len)
 127                 return NULL;
 128
 129         tokens = g_strsplit(buf, ",", 4);
 130         if (!strcmp("Agilent Technologies", tokens[0])
 131                         && tokens[1] && tokens[2] && tokens[3]) {
 132                 for (i = 0; supported_agdmm[i].model; i++) {
 133                         if (strcmp(supported_agdmm[i].modelname, tokens[1]))
 134                                 continue;
 135                         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 136                         sdi->status = SR_ST_INACTIVE;
 137                         sdi->vendor = g_strdup("Agilent");
 138                         sdi->model = g_strdup(tokens[1]);
 139                         sdi->version = g_strdup(tokens[3]);
 140                         devc = g_malloc0(sizeof(struct dev_context));
 141                         devc->profile = &supported_agdmm[i];
 142                         devc->cur_mq = -1;
 143                         sdi->inst_type = SR_INST_SERIAL;
 144                         sdi->conn = serial;
 145                         sdi->priv = devc;
 146                         sdi->driver = di;
 147                         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
 148                         drvc->instances = g_slist_append(drvc->instances, sdi);
 149                         devices = g_slist_append(devices, sdi);
 150                         break;
 151                 }
 152         }
 153         g_strfreev(tokens);
 154         g_free(buf);
 155
 156         serial_close(serial);
 157         if (!devices)
 158                 sr_serial_dev_inst_free(serial);
 159
 160         return devices;
 161 }
 162
 163 static GSList *dev_list(const struct sr_dev_driver *di)
 164 {
 165         return ((struct drv_context *)(di->context))->instances;
 166 }
 167
 168 static int cleanup(const struct sr_dev_driver *di)
 169 {
 170         return std_dev_clear(di, NULL);
 171 }
 172
 173 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 174                 const struct sr_channel_group *cg)
 175 {
 176         struct dev_context *devc;
 177
 178         (void)cg;
 179
 180         if (sdi->status != SR_ST_ACTIVE)
 181                 return SR_ERR_DEV_CLOSED;
 182
 183         if (!(devc = sdi->priv)) {
 184                 sr_err("sdi->priv was NULL.");
 185                 return SR_ERR_BUG;
 186         }
 187
 188         switch (key) {
 189         case SR_CONF_LIMIT_MSEC:
 190                 /* TODO: not yet implemented */
 191                 devc->limit_msec = g_variant_get_uint64(data);
 192                 break;
 193         case SR_CONF_LIMIT_SAMPLES:
 194                 devc->limit_samples = g_variant_get_uint64(data);
 195                 break;
 196         default:
 197                 return SR_ERR_NA;
 198         }
 199
 200         return SR_OK;
 201 }
 202
 203 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 204                 const struct sr_channel_group *cg)
 205 {
 206         (void)sdi;
 207         (void)cg;
 208
 209         switch (key) {
 210         case SR_CONF_SCAN_OPTIONS:
 211                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 212                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 213                 break;
 214         case SR_CONF_DEVICE_OPTIONS:
 215                 if (!sdi)
 216                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 217                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 218                 else
 219                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 220                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 221                 break;
 222         default:
 223                 return SR_ERR_NA;
 224         }
 225
 226         return SR_OK;
 227 }
 228
 229 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 230 {
 231         struct dev_context *devc;
 232         struct sr_serial_dev_inst *serial;
 233
 234         if (sdi->status != SR_ST_ACTIVE)
 235                 return SR_ERR_DEV_CLOSED;
 236
 237         if (!(devc = sdi->priv)) {
 238                 sr_err("sdi->priv was NULL.");
 239                 return SR_ERR_BUG;
 240         }
 241
 242         devc->cb_data = cb_data;
 243
 244         /* Send header packet to the session bus. */
 245         std_session_send_df_header(cb_data, LOG_PREFIX);
 246
 247         /* Poll every 100ms, or whenever some data comes in. */
 248         serial = sdi->conn;
 249         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 250                         agdmm_receive_data, (void *)sdi);
 251
 252         return SR_OK;
 253 }
 254
 255 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 256 {
 257         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 258                         sdi->conn, LOG_PREFIX);
 259 }
 260
 261 SR_PRIV struct sr_dev_driver agdmm_driver_info = {
 262         .name = "agilent-dmm",
 263         .longname = "Agilent U12xx series DMMs",
 264         .api_version = 1,
 265         .init = init,
 266         .cleanup = cleanup,
 267         .scan = scan,
 268         .dev_list = dev_list,
 269         .dev_clear = NULL,
 270         .config_get = NULL,
 271         .config_set = config_set,
 272         .config_list = config_list,
 273         .dev_open = std_serial_dev_open,
 274         .dev_close = std_serial_dev_close,
 275         .dev_acquisition_start = dev_acquisition_start,
 276         .dev_acquisition_stop = dev_acquisition_stop,
 277         .context = NULL,
 278 };