src/hardware/conrad-digi-35-cpu/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
   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 /** @file
  21  *  <em>Conrad DIGI 35 CPU</em> power supply driver
  22  *  @internal
  23  */
  24
  25 #include <config.h>
  26 #include "protocol.h"
  27
  28 #define SERIALCOMM "9600/8n1"
  29
  30 static const uint32_t scanopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33 };
  34
  35 static const uint32_t devopts[] = {
  36         SR_CONF_POWER_SUPPLY,
  37         SR_CONF_VOLTAGE | SR_CONF_SET,
  38         SR_CONF_CURRENT | SR_CONF_SET,
  39         SR_CONF_OVER_CURRENT_PROTECTION_ENABLED | SR_CONF_SET,
  40 };
  41
  42 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  43 {
  44         struct sr_dev_inst *sdi;
  45         struct drv_context *drvc;
  46         struct sr_config *src;
  47         struct sr_serial_dev_inst *serial;
  48         GSList *l, *devices;
  49         const char *conn, *serialcomm;
  50
  51         devices = NULL;
  52         drvc = di->context;
  53         conn = serialcomm = NULL;
  54
  55         for (l = options; l; l = l->next) {
  56                 src = l->data;
  57                 switch (src->key) {
  58                 case SR_CONF_CONN:
  59                         conn = g_variant_get_string(src->data, NULL);
  60                         break;
  61                 case SR_CONF_SERIALCOMM:
  62                         serialcomm = g_variant_get_string(src->data, NULL);
  63                         break;
  64                 }
  65         }
  66         if (!conn)
  67                 return NULL;
  68         if (!serialcomm)
  69                 serialcomm = SERIALCOMM;
  70
  71         /*
  72          * We cannot scan for this device because it is write-only.
  73          * So just check that the port parameters are valid and assume that
  74          * the device is there.
  75          */
  76
  77         serial = sr_serial_dev_inst_new(conn, serialcomm);
  78
  79         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
  80                 return NULL;
  81
  82         serial_flush(serial);
  83         serial_close(serial);
  84
  85         sr_spew("Conrad DIGI 35 CPU assumed at %s.", conn);
  86
  87         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  88         sdi->status = SR_ST_INACTIVE;
  89         sdi->vendor = g_strdup("Conrad");
  90         sdi->model = g_strdup("DIGI 35 CPU");
  91         sdi->conn = serial;
  92         sdi->priv = NULL;
  93         sdi->driver = di;
  94         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "CH1");
  95         drvc->instances = g_slist_append(drvc->instances, sdi);
  96         devices = g_slist_append(devices, sdi);
  97
  98         return devices;
  99 }
 100
 101 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 102                 const struct sr_channel_group *cg)
 103 {
 104         int ret;
 105         double dblval;
 106
 107         (void)cg;
 108
 109         if (sdi->status != SR_ST_ACTIVE)
 110                 return SR_ERR_DEV_CLOSED;
 111
 112         switch (key) {
 113         case SR_CONF_VOLTAGE:
 114                 dblval = g_variant_get_double(data);
 115                 if ((dblval < 0.0) || (dblval > 35.0)) {
 116                         sr_err("Voltage out of range (0 - 35.0)!");
 117                         return SR_ERR_ARG;
 118                 }
 119                 ret = send_msg1(sdi, 'V', (int) (dblval * 10 + 0.5));
 120                 break;
 121         case SR_CONF_CURRENT:
 122                 dblval = g_variant_get_double(data);
 123                 if ((dblval < 0.01) || (dblval > 2.55)) {
 124                         sr_err("Current out of range (0 - 2.55)!");
 125                         return SR_ERR_ARG;
 126                 }
 127                 ret = send_msg1(sdi, 'C', (int) (dblval * 100 + 0.5));
 128                 break;
 129         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 130                 if (g_variant_get_boolean(data))
 131                         ret = send_msg1(sdi, 'V', 900);
 132                 else /* Constant current mode */
 133                         ret = send_msg1(sdi, 'V', 901);
 134                 break;
 135         default:
 136                 ret = SR_ERR_NA;
 137         }
 138
 139         return ret;
 140 }
 141
 142 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 143                 const struct sr_channel_group *cg)
 144 {
 145         int ret;
 146
 147         (void)sdi;
 148         (void)cg;
 149
 150         ret = SR_OK;
 151         switch (key) {
 152         case SR_CONF_SCAN_OPTIONS:
 153                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 154                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 155                 break;
 156         case SR_CONF_DEVICE_OPTIONS:
 157                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 158                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 159                 break;
 160         default:
 161                 return SR_ERR_NA;
 162         }
 163
 164         return ret;
 165 }
 166
 167 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 168 {
 169         if (sdi->status != SR_ST_ACTIVE)
 170                 return SR_ERR_DEV_CLOSED;
 171
 172         return SR_OK;
 173 }
 174
 175 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 176 {
 177         if (sdi->status != SR_ST_ACTIVE)
 178                 return SR_ERR_DEV_CLOSED;
 179
 180         return SR_OK;
 181 }
 182
 183 static struct sr_dev_driver conrad_digi_35_cpu_driver_info = {
 184         .name = "conrad-digi-35-cpu",
 185         .longname = "Conrad DIGI 35 CPU",
 186         .api_version = 1,
 187         .init = std_init,
 188         .cleanup = std_cleanup,
 189         .scan = scan,
 190         .dev_list = std_dev_list,
 191         .dev_clear = NULL,
 192         .config_get = NULL,
 193         .config_set = config_set,
 194         .config_list = config_list,
 195         .dev_open = std_serial_dev_open,
 196         .dev_close = std_serial_dev_close,
 197         .dev_acquisition_start = dev_acquisition_start,
 198         .dev_acquisition_stop = dev_acquisition_stop,
 199         .context = NULL,
 200 };
 201 SR_REGISTER_DEV_DRIVER(conrad_digi_35_cpu_driver_info);