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 <errno.h>
  26 #include "libsigrok.h"
  27 #include "libsigrok-internal.h"
  28 #include "agilent-dmm.h"
  29
  30 static const uint32_t scanopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33 };
  34
  35 static const uint32_t drvopts[] = {
  36         SR_CONF_MULTIMETER,
  37 };
  38
  39 static const uint32_t devopts[] = {
  40         SR_CONF_CONTINUOUS | SR_CONF_SET,
  41         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  42         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  43 };
  44
  45 extern const struct agdmm_job agdmm_jobs_u12xx[];
  46 extern const struct agdmm_recv agdmm_recvs_u123x[];
  47 extern const struct agdmm_recv agdmm_recvs_u124x[];
  48 extern const struct agdmm_recv agdmm_recvs_u125x[];
  49
  50 /* This works on all the Agilent U12xxA series, although the
  51  * U127xA can apparently also run at 19200/8n1. */
  52 #define SERIALCOMM "9600/8n1"
  53
  54 static const struct agdmm_profile supported_agdmm[] = {
  55         { AGILENT_U1231, "U1231A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  56         { AGILENT_U1232, "U1232A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  57         { AGILENT_U1233, "U1233A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  58
  59         { AGILENT_U1241, "U1241A", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  60         { AGILENT_U1242, "U1242A", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  61         { AGILENT_U1241, "U1241B", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  62         { AGILENT_U1242, "U1242B", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  63
  64         { AGILENT_U1251, "U1251A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  65         { AGILENT_U1252, "U1252A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  66         { AGILENT_U1253, "U1253A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  67         { AGILENT_U1251, "U1251B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  68         { AGILENT_U1252, "U1252B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  69         { AGILENT_U1253, "U1253B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  70         ALL_ZERO
  71 };
  72
  73 SR_PRIV struct sr_dev_driver agdmm_driver_info;
  74 static struct sr_dev_driver *di = &agdmm_driver_info;
  75
  76 static int init(struct sr_context *sr_ctx)
  77 {
  78         return std_init(sr_ctx, di, LOG_PREFIX);
  79 }
  80
  81 static GSList *scan(GSList *options)
  82 {
  83         struct sr_dev_inst *sdi;
  84         struct drv_context *drvc;
  85         struct dev_context *devc;
  86         struct sr_config *src;
  87         struct sr_serial_dev_inst *serial;
  88         GSList *l, *devices;
  89         int len, i;
  90         const char *conn, *serialcomm;
  91         char *buf, **tokens;
  92
  93         drvc = di->priv;
  94         drvc->instances = NULL;
  95
  96         devices = NULL;
  97         conn = serialcomm = NULL;
  98         for (l = options; l; l = l->next) {
  99                 src = l->data;
 100                 switch (src->key) {
 101                 case SR_CONF_CONN:
 102                         conn = g_variant_get_string(src->data, NULL);
 103                         break;
 104                 case SR_CONF_SERIALCOMM:
 105                         serialcomm = g_variant_get_string(src->data, NULL);
 106                         break;
 107                 }
 108         }
 109         if (!conn)
 110                 return NULL;
 111         if (!serialcomm)
 112                 serialcomm = SERIALCOMM;
 113
 114         serial = sr_serial_dev_inst_new(conn, serialcomm);
 115
 116         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 117                 return NULL;
 118
 119         serial_flush(serial);
 120         if (serial_write_blocking(serial, "*IDN?\r\n", 7, SERIAL_WRITE_TIMEOUT_MS) < 7) {
 121                 sr_err("Unable to send identification string.");
 122                 return NULL;
 123         }
 124
 125         len = 128;
 126         if (!(buf = g_try_malloc(len))) {
 127                 sr_err("Serial buffer malloc failed.");
 128                 return NULL;
 129         }
 130         serial_readline(serial, &buf, &len, 250);
 131         if (!len)
 132                 return NULL;
 133
 134         tokens = g_strsplit(buf, ",", 4);
 135         if (!strcmp("Agilent Technologies", tokens[0])
 136                         && tokens[1] && tokens[2] && tokens[3]) {
 137                 for (i = 0; supported_agdmm[i].model; i++) {
 138                         if (strcmp(supported_agdmm[i].modelname, tokens[1]))
 139                                 continue;
 140                         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 141                         sdi->status = SR_ST_INACTIVE;
 142                         sdi->vendor = g_strdup("Agilent");
 143                         sdi->model = g_strdup(tokens[1]);
 144                         sdi->version = g_strdup(tokens[3]);
 145                         devc = g_malloc0(sizeof(struct dev_context));
 146                         devc->profile = &supported_agdmm[i];
 147                         devc->cur_mq = -1;
 148                         sdi->inst_type = SR_INST_SERIAL;
 149                         sdi->conn = serial;
 150                         sdi->priv = devc;
 151                         sdi->driver = di;
 152                         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
 153                         drvc->instances = g_slist_append(drvc->instances, sdi);
 154                         devices = g_slist_append(devices, sdi);
 155                         break;
 156                 }
 157         }
 158         g_strfreev(tokens);
 159         g_free(buf);
 160
 161         serial_close(serial);
 162         if (!devices)
 163                 sr_serial_dev_inst_free(serial);
 164
 165         return devices;
 166 }
 167
 168 static GSList *dev_list(void)
 169 {
 170         return ((struct drv_context *)(di->priv))->instances;
 171 }
 172
 173 static int cleanup(void)
 174 {
 175         return std_dev_clear(di, NULL);
 176 }
 177
 178 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 179                 const struct sr_channel_group *cg)
 180 {
 181         struct dev_context *devc;
 182
 183         (void)cg;
 184
 185         if (sdi->status != SR_ST_ACTIVE)
 186                 return SR_ERR_DEV_CLOSED;
 187
 188         if (!(devc = sdi->priv)) {
 189                 sr_err("sdi->priv was NULL.");
 190                 return SR_ERR_BUG;
 191         }
 192
 193         switch (key) {
 194         case SR_CONF_LIMIT_MSEC:
 195                 /* TODO: not yet implemented */
 196                 if (g_variant_get_uint64(data) == 0) {
 197                         sr_err("LIMIT_MSEC can't be 0.");
 198                         return SR_ERR;
 199                 }
 200                 devc->limit_msec = g_variant_get_uint64(data);
 201                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 202                        devc->limit_msec);
 203                 break;
 204         case SR_CONF_LIMIT_SAMPLES:
 205                 devc->limit_samples = g_variant_get_uint64(data);
 206                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 207                        devc->limit_samples);
 208                 break;
 209         default:
 210                 return SR_ERR_NA;
 211         }
 212
 213         return SR_OK;
 214 }
 215
 216 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 217                 const struct sr_channel_group *cg)
 218 {
 219         (void)sdi;
 220         (void)cg;
 221
 222         switch (key) {
 223         case SR_CONF_SCAN_OPTIONS:
 224                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 225                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 226                 break;
 227         case SR_CONF_DEVICE_OPTIONS:
 228                 if (!sdi)
 229                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 230                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 231                 else
 232                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 233                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 234                 break;
 235         default:
 236                 return SR_ERR_NA;
 237         }
 238
 239         return SR_OK;
 240 }
 241
 242 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 243 {
 244         struct dev_context *devc;
 245         struct sr_serial_dev_inst *serial;
 246
 247         if (sdi->status != SR_ST_ACTIVE)
 248                 return SR_ERR_DEV_CLOSED;
 249
 250         if (!(devc = sdi->priv)) {
 251                 sr_err("sdi->priv was NULL.");
 252                 return SR_ERR_BUG;
 253         }
 254
 255         devc->cb_data = cb_data;
 256
 257         /* Send header packet to the session bus. */
 258         std_session_send_df_header(cb_data, LOG_PREFIX);
 259
 260         /* Poll every 100ms, or whenever some data comes in. */
 261         serial = sdi->conn;
 262         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 263                         agdmm_receive_data, (void *)sdi);
 264
 265         return SR_OK;
 266 }
 267
 268 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 269 {
 270         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 271                         sdi->conn, LOG_PREFIX);
 272 }
 273
 274 SR_PRIV struct sr_dev_driver agdmm_driver_info = {
 275         .name = "agilent-dmm",
 276         .longname = "Agilent U12xx series DMMs",
 277         .api_version = 1,
 278         .init = init,
 279         .cleanup = cleanup,
 280         .scan = scan,
 281         .dev_list = dev_list,
 282         .dev_clear = NULL,
 283         .config_get = NULL,
 284         .config_set = config_set,
 285         .config_list = config_list,
 286         .dev_open = std_serial_dev_open,
 287         .dev_close = std_serial_dev_close,
 288         .dev_acquisition_start = dev_acquisition_start,
 289         .dev_acquisition_stop = dev_acquisition_stop,
 290         .priv = NULL,
 291 };