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 int32_t hwopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33 };
  34
  35 static const int32_t hwcaps[] = {
  36         SR_CONF_MULTIMETER,
  37         SR_CONF_LIMIT_SAMPLES,
  38         SR_CONF_LIMIT_MSEC,
  39         SR_CONF_CONTINUOUS,
  40 };
  41
  42 extern const struct agdmm_job agdmm_jobs_u123x[];
  43 extern const struct agdmm_recv agdmm_recvs_u123x[];
  44 extern const struct agdmm_job agdmm_jobs_u125x[];
  45 extern const struct agdmm_recv agdmm_recvs_u125x[];
  46
  47 /* This works on all the Agilent U12xxA series, although the
  48  * U127xA can apparently also run at 19200/8n1. */
  49 #define SERIALCOMM "9600/8n1"
  50
  51 static const struct agdmm_profile supported_agdmm[] = {
  52         { AGILENT_U1231A, "U1231A", agdmm_jobs_u123x, agdmm_recvs_u123x },
  53         { AGILENT_U1232A, "U1232A", agdmm_jobs_u123x, agdmm_recvs_u123x },
  54         { AGILENT_U1233A, "U1233A", agdmm_jobs_u123x, agdmm_recvs_u123x },
  55         { AGILENT_U1251A, "U1251A", agdmm_jobs_u125x, agdmm_recvs_u125x },
  56         { AGILENT_U1252A, "U1252A", agdmm_jobs_u125x, agdmm_recvs_u125x },
  57         { AGILENT_U1253A, "U1253A", agdmm_jobs_u125x, agdmm_recvs_u125x },
  58         { 0, NULL, NULL, NULL }
  59 };
  60
  61 SR_PRIV struct sr_dev_driver agdmm_driver_info;
  62 static struct sr_dev_driver *di = &agdmm_driver_info;
  63
  64 static int init(struct sr_context *sr_ctx)
  65 {
  66         return std_init(sr_ctx, di, LOG_PREFIX);
  67 }
  68
  69 static GSList *scan(GSList *options)
  70 {
  71         struct sr_dev_inst *sdi;
  72         struct drv_context *drvc;
  73         struct dev_context *devc;
  74         struct sr_config *src;
  75         struct sr_channel *ch;
  76         struct sr_serial_dev_inst *serial;
  77         GSList *l, *devices;
  78         int len, i;
  79         const char *conn, *serialcomm;
  80         char *buf, **tokens;
  81
  82         drvc = di->priv;
  83         drvc->instances = NULL;
  84
  85         devices = NULL;
  86         conn = serialcomm = NULL;
  87         for (l = options; l; l = l->next) {
  88                 src = l->data;
  89                 switch (src->key) {
  90                 case SR_CONF_CONN:
  91                         conn = g_variant_get_string(src->data, NULL);
  92                         break;
  93                 case SR_CONF_SERIALCOMM:
  94                         serialcomm = g_variant_get_string(src->data, NULL);
  95                         break;
  96                 }
  97         }
  98         if (!conn)
  99                 return NULL;
 100         if (!serialcomm)
 101                 serialcomm = SERIALCOMM;
 102
 103         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 104                 return NULL;
 105
 106         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 107                 return NULL;
 108
 109         serial_flush(serial);
 110         if (serial_write(serial, "*IDN?\r\n", 7) == -1) {
 111                 sr_err("Unable to send identification string: %s.",
 112                        strerror(errno));
 113                 return NULL;
 114         }
 115
 116         len = 128;
 117         if (!(buf = g_try_malloc(len))) {
 118                 sr_err("Serial buffer malloc failed.");
 119                 return NULL;
 120         }
 121         serial_readline(serial, &buf, &len, 150);
 122         if (!len)
 123                 return NULL;
 124
 125         tokens = g_strsplit(buf, ",", 4);
 126         if (!strcmp("Agilent Technologies", tokens[0])
 127                         && tokens[1] && tokens[2] && tokens[3]) {
 128                 for (i = 0; supported_agdmm[i].model; i++) {
 129                         if (strcmp(supported_agdmm[i].modelname, tokens[1]))
 130                                 continue;
 131                         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Agilent",
 132                                         tokens[1], tokens[3])))
 133                                 return NULL;
 134                         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 135                                 sr_err("Device context malloc failed.");
 136                                 return NULL;
 137                         }
 138                         devc->profile = &supported_agdmm[i];
 139                         devc->cur_mq = -1;
 140                         sdi->inst_type = SR_INST_SERIAL;
 141                         sdi->conn = serial;
 142                         sdi->priv = devc;
 143                         sdi->driver = di;
 144                         if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P1")))
 145                                 return NULL;
 146                         sdi->channels = g_slist_append(sdi->channels, ch);
 147                         drvc->instances = g_slist_append(drvc->instances, sdi);
 148                         devices = g_slist_append(devices, sdi);
 149                         break;
 150                 }
 151         }
 152         g_strfreev(tokens);
 153         g_free(buf);
 154
 155         serial_close(serial);
 156         if (!devices)
 157                 sr_serial_dev_inst_free(serial);
 158
 159         return devices;
 160 }
 161
 162 static GSList *dev_list(void)
 163 {
 164         return ((struct drv_context *)(di->priv))->instances;
 165 }
 166
 167 static int cleanup(void)
 168 {
 169         return std_dev_clear(di, NULL);
 170 }
 171
 172 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
 173                 const struct sr_channel_group *cg)
 174 {
 175         struct dev_context *devc;
 176
 177         (void)cg;
 178
 179         if (sdi->status != SR_ST_ACTIVE)
 180                 return SR_ERR_DEV_CLOSED;
 181
 182         if (!(devc = sdi->priv)) {
 183                 sr_err("sdi->priv was NULL.");
 184                 return SR_ERR_BUG;
 185         }
 186
 187         switch (id) {
 188         case SR_CONF_LIMIT_MSEC:
 189                 /* TODO: not yet implemented */
 190                 if (g_variant_get_uint64(data) == 0) {
 191                         sr_err("LIMIT_MSEC can't be 0.");
 192                         return SR_ERR;
 193                 }
 194                 devc->limit_msec = g_variant_get_uint64(data);
 195                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 196                        devc->limit_msec);
 197                 break;
 198         case SR_CONF_LIMIT_SAMPLES:
 199                 devc->limit_samples = g_variant_get_uint64(data);
 200                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 201                        devc->limit_samples);
 202                 break;
 203         default:
 204                 return SR_ERR_NA;
 205         }
 206
 207         return SR_OK;
 208 }
 209
 210 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 211                 const struct sr_channel_group *cg)
 212 {
 213         (void)sdi;
 214         (void)cg;
 215
 216         switch (key) {
 217         case SR_CONF_SCAN_OPTIONS:
 218                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 219                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 220                 break;
 221         case SR_CONF_DEVICE_OPTIONS:
 222                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 223                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 224                 break;
 225         default:
 226                 return SR_ERR_NA;
 227         }
 228
 229         return SR_OK;
 230 }
 231
 232 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 233 {
 234         struct dev_context *devc;
 235         struct sr_serial_dev_inst *serial;
 236
 237         if (sdi->status != SR_ST_ACTIVE)
 238                 return SR_ERR_DEV_CLOSED;
 239
 240         if (!(devc = sdi->priv)) {
 241                 sr_err("sdi->priv was NULL.");
 242                 return SR_ERR_BUG;
 243         }
 244
 245         devc->cb_data = cb_data;
 246
 247         /* Send header packet to the session bus. */
 248         std_session_send_df_header(cb_data, LOG_PREFIX);
 249
 250         /* Poll every 100ms, or whenever some data comes in. */
 251         serial = sdi->conn;
 252         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 253                         agdmm_receive_data, (void *)sdi);
 254
 255         return SR_OK;
 256 }
 257
 258 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 259 {
 260         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 261                         sdi->conn, LOG_PREFIX);
 262 }
 263
 264 SR_PRIV struct sr_dev_driver agdmm_driver_info = {
 265         .name = "agilent-dmm",
 266         .longname = "Agilent U12xx series DMMs",
 267         .api_version = 1,
 268         .init = init,
 269         .cleanup = cleanup,
 270         .scan = scan,
 271         .dev_list = dev_list,
 272         .dev_clear = NULL,
 273         .config_get = NULL,
 274         .config_set = config_set,
 275         .config_list = config_list,
 276         .dev_open = std_serial_dev_open,
 277         .dev_close = std_serial_dev_close,
 278         .dev_acquisition_start = dev_acquisition_start,
 279         .dev_acquisition_stop = dev_acquisition_stop,
 280         .priv = NULL,
 281 };