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