src/hardware/rdtech-um/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2018-2020 Andreas Sandberg <andreas@sandberg.pp.se>
   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
  21 #include <config.h>
  22 #include <glib.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <string.h>
  27
  28 #include <libsigrok/libsigrok.h>
  29 #include "libsigrok-internal.h"
  30
  31 #include "protocol.h"
  32
  33 #define RDTECH_UM_SERIALCOMM "115200/8n1"
  34
  35 static const uint32_t scanopts[] = {
  36         SR_CONF_CONN,
  37         SR_CONF_SERIALCOMM,
  38 };
  39
  40 static const uint32_t drvopts[] = {
  41         SR_CONF_ENERGYMETER,
  42 };
  43
  44 static const uint32_t devopts[] = {
  45         SR_CONF_CONTINUOUS,
  46         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  47         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  48 };
  49
  50 static GSList *rdtech_um_scan(struct sr_dev_driver *di, const char *conn,
  51                               const char *serialcomm)
  52 {
  53         struct sr_serial_dev_inst *serial;
  54         const struct rdtech_um_profile *p = NULL;
  55         GSList *devices = NULL;
  56         struct dev_context *devc = NULL;
  57         struct sr_dev_inst *sdi = NULL;
  58
  59         serial = sr_serial_dev_inst_new(conn, serialcomm);
  60         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
  61                 goto err_out;
  62
  63         p = rdtech_um_probe(serial);
  64         if (!p) {
  65                 sr_err("Failed to find a supported RDTech UM device.");
  66                 goto err_out_serial;
  67         }
  68
  69         devc = g_malloc0(sizeof(struct dev_context));
  70         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  71
  72         sr_sw_limits_init(&devc->limits);
  73         devc->profile = p;
  74
  75         sdi->status = SR_ST_INACTIVE;
  76         sdi->vendor = g_strdup("RDTech");
  77         sdi->model = g_strdup(p->model_name);
  78         sdi->version = NULL;
  79         sdi->inst_type = SR_INST_SERIAL;
  80         sdi->conn = serial;
  81         sdi->priv = devc;
  82
  83         for (int i = 0; p->channels[i].name; i++)
  84                 sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE,
  85                                p->channels[i].name);
  86
  87         devices = g_slist_append(devices, sdi);
  88         serial_close(serial);
  89         if (!devices)
  90                 sr_serial_dev_inst_free(serial);
  91
  92         return std_scan_complete(di, devices);
  93
  94 err_out_serial:
  95         serial_close(serial);
  96 err_out:
  97         sr_serial_dev_inst_free(serial);
  98
  99         return NULL;
 100 }
 101
 102 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 103 {
 104         struct sr_config *src;
 105         const char *conn = NULL;
 106         const char *serialcomm = RDTECH_UM_SERIALCOMM;
 107
 108         for (GSList *l = options; l; l = l->next) {
 109                 src = l->data;
 110                 switch (src->key) {
 111                 case SR_CONF_CONN:
 112                         conn = g_variant_get_string(src->data, NULL);
 113                         break;
 114                 case SR_CONF_SERIALCOMM:
 115                         serialcomm = g_variant_get_string(src->data, NULL);
 116                         break;
 117                 }
 118         }
 119         if (!conn)
 120                 return NULL;
 121
 122         return rdtech_um_scan(di, conn, serialcomm);
 123 }
 124
 125 static int config_set(uint32_t key, GVariant *data,
 126                       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 127 {
 128         struct dev_context *devc;
 129
 130         (void)cg;
 131
 132         devc = sdi->priv;
 133
 134         return sr_sw_limits_config_set(&devc->limits, key, data);
 135 }
 136
 137 static int config_list(uint32_t key, GVariant **data,
 138                        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 139 {
 140         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 141 }
 142
 143 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 144 {
 145         struct dev_context *devc = sdi->priv;
 146         struct sr_serial_dev_inst *serial = sdi->conn;
 147
 148         sr_sw_limits_acquisition_start(&devc->limits);
 149         std_session_send_df_header(sdi);
 150
 151         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 152                           rdtech_um_receive_data, (void *)sdi);
 153
 154         return rdtech_um_poll(sdi);
 155 }
 156
 157 static struct sr_dev_driver rdtech_um_driver_info = {
 158         .name = "rdtech-um",
 159         .longname = "RDTech UMxx USB power meter",
 160         .api_version = 1,
 161         .init = std_init,
 162         .cleanup = std_cleanup,
 163         .scan = scan,
 164         .dev_list = std_dev_list,
 165         .dev_clear = std_dev_clear,
 166         .config_get = NULL,
 167         .config_set = config_set,
 168         .config_list = config_list,
 169         .dev_open = std_serial_dev_open,
 170         .dev_close = std_serial_dev_close,
 171         .dev_acquisition_start = dev_acquisition_start,
 172         .dev_acquisition_stop = std_serial_dev_acquisition_stop,
 173         .context = NULL,
 174 };
 175 SR_REGISTER_DEV_DRIVER(rdtech_um_driver_info);