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 hwopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33 };
  34
  35 static const uint32_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_u12xx[];
  43 extern const struct agdmm_recv agdmm_recvs_u123x[];
  44 extern const struct agdmm_recv agdmm_recvs_u124x[];
  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_U1231, "U1231A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  53         { AGILENT_U1232, "U1232A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  54         { AGILENT_U1233, "U1233A", agdmm_jobs_u12xx, agdmm_recvs_u123x },
  55
  56         { AGILENT_U1241, "U1241A", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  57         { AGILENT_U1242, "U1242A", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  58         { AGILENT_U1241, "U1241B", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  59         { AGILENT_U1242, "U1242B", agdmm_jobs_u12xx, agdmm_recvs_u124x },
  60
  61         { AGILENT_U1251, "U1251A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  62         { AGILENT_U1252, "U1252A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  63         { AGILENT_U1253, "U1253A", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  64         { AGILENT_U1251, "U1251B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  65         { AGILENT_U1252, "U1252B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  66         { AGILENT_U1253, "U1253B", agdmm_jobs_u12xx, agdmm_recvs_u125x },
  67         ALL_ZERO
  68 };
  69
  70 SR_PRIV struct sr_dev_driver agdmm_driver_info;
  71 static struct sr_dev_driver *di = &agdmm_driver_info;
  72
  73 static int init(struct sr_context *sr_ctx)
  74 {
  75         return std_init(sr_ctx, di, LOG_PREFIX);
  76 }
  77
  78 static GSList *scan(GSList *options)
  79 {
  80         struct sr_dev_inst *sdi;
  81         struct drv_context *drvc;
  82         struct dev_context *devc;
  83         struct sr_config *src;
  84         struct sr_channel *ch;
  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->priv;
  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         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 113                 return NULL;
 114
 115         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 116                 return NULL;
 117
 118         serial_flush(serial);
 119         if (serial_write(serial, "*IDN?\r\n", 7) == -1) {
 120                 sr_err("Unable to send identification string: %s.",
 121                        strerror(errno));
 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                         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, "Agilent",
 141                                         tokens[1], tokens[3])))
 142                                 return NULL;
 143                         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 144                                 sr_err("Device context malloc failed.");
 145                                 return NULL;
 146                         }
 147                         devc->profile = &supported_agdmm[i];
 148                         devc->cur_mq = -1;
 149                         sdi->inst_type = SR_INST_SERIAL;
 150                         sdi->conn = serial;
 151                         sdi->priv = devc;
 152                         sdi->driver = di;
 153                         if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P1")))
 154                                 return NULL;
 155                         sdi->channels = g_slist_append(sdi->channels, ch);
 156                         drvc->instances = g_slist_append(drvc->instances, sdi);
 157                         devices = g_slist_append(devices, sdi);
 158                         break;
 159                 }
 160         }
 161         g_strfreev(tokens);
 162         g_free(buf);
 163
 164         serial_close(serial);
 165         if (!devices)
 166                 sr_serial_dev_inst_free(serial);
 167
 168         return devices;
 169 }
 170
 171 static GSList *dev_list(void)
 172 {
 173         return ((struct drv_context *)(di->priv))->instances;
 174 }
 175
 176 static int cleanup(void)
 177 {
 178         return std_dev_clear(di, NULL);
 179 }
 180
 181 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 182                 const struct sr_channel_group *cg)
 183 {
 184         struct dev_context *devc;
 185
 186         (void)cg;
 187
 188         if (sdi->status != SR_ST_ACTIVE)
 189                 return SR_ERR_DEV_CLOSED;
 190
 191         if (!(devc = sdi->priv)) {
 192                 sr_err("sdi->priv was NULL.");
 193                 return SR_ERR_BUG;
 194         }
 195
 196         switch (key) {
 197         case SR_CONF_LIMIT_MSEC:
 198                 /* TODO: not yet implemented */
 199                 if (g_variant_get_uint64(data) == 0) {
 200                         sr_err("LIMIT_MSEC can't be 0.");
 201                         return SR_ERR;
 202                 }
 203                 devc->limit_msec = g_variant_get_uint64(data);
 204                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 205                        devc->limit_msec);
 206                 break;
 207         case SR_CONF_LIMIT_SAMPLES:
 208                 devc->limit_samples = g_variant_get_uint64(data);
 209                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 210                        devc->limit_samples);
 211                 break;
 212         default:
 213                 return SR_ERR_NA;
 214         }
 215
 216         return SR_OK;
 217 }
 218
 219 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 220                 const struct sr_channel_group *cg)
 221 {
 222         (void)sdi;
 223         (void)cg;
 224
 225         switch (key) {
 226         case SR_CONF_SCAN_OPTIONS:
 227                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 228                                 hwopts, ARRAY_SIZE(hwopts), sizeof(uint32_t));
 229                 break;
 230         case SR_CONF_DEVICE_OPTIONS:
 231                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 232                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(uint32_t));
 233                 break;
 234         default:
 235                 return SR_ERR_NA;
 236         }
 237
 238         return SR_OK;
 239 }
 240
 241 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 242 {
 243         struct dev_context *devc;
 244         struct sr_serial_dev_inst *serial;
 245
 246         if (sdi->status != SR_ST_ACTIVE)
 247                 return SR_ERR_DEV_CLOSED;
 248
 249         if (!(devc = sdi->priv)) {
 250                 sr_err("sdi->priv was NULL.");
 251                 return SR_ERR_BUG;
 252         }
 253
 254         devc->cb_data = cb_data;
 255
 256         /* Send header packet to the session bus. */
 257         std_session_send_df_header(cb_data, LOG_PREFIX);
 258
 259         /* Poll every 100ms, or whenever some data comes in. */
 260         serial = sdi->conn;
 261         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 262                         agdmm_receive_data, (void *)sdi);
 263
 264         return SR_OK;
 265 }
 266
 267 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 268 {
 269         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 270                         sdi->conn, LOG_PREFIX);
 271 }
 272
 273 SR_PRIV struct sr_dev_driver agdmm_driver_info = {
 274         .name = "agilent-dmm",
 275         .longname = "Agilent U12xx series DMMs",
 276         .api_version = 1,
 277         .init = init,
 278         .cleanup = cleanup,
 279         .scan = scan,
 280         .dev_list = dev_list,
 281         .dev_clear = NULL,
 282         .config_get = NULL,
 283         .config_set = config_set,
 284         .config_list = config_list,
 285         .dev_open = std_serial_dev_open,
 286         .dev_close = std_serial_dev_close,
 287         .dev_acquisition_start = dev_acquisition_start,
 288         .dev_acquisition_stop = dev_acquisition_stop,
 289         .priv = NULL,
 290 };