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 /**
  21  * @file
  22  *
  23  * <em>Conrad DIGI 35 CPU</em> power supply driver
  24  *
  25  * @internal
  26  */
  27
  28 #include <config.h>
  29 #include "protocol.h"
  30
  31 #define SERIALCOMM "9600/8n1"
  32
  33 static const uint32_t scanopts[] = {
  34         SR_CONF_CONN,
  35         SR_CONF_SERIALCOMM,
  36 };
  37
  38 static const uint32_t devopts[] = {
  39         SR_CONF_POWER_SUPPLY,
  40         SR_CONF_VOLTAGE | SR_CONF_SET,
  41         SR_CONF_CURRENT | SR_CONF_SET,
  42         SR_CONF_OVER_CURRENT_PROTECTION_ENABLED | SR_CONF_SET,
  43 };
  44
  45 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  46 {
  47         struct sr_dev_inst *sdi;
  48         struct sr_config *src;
  49         struct sr_serial_dev_inst *serial;
  50         GSList *l;
  51         const char *conn, *serialcomm;
  52
  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         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "CH1");
  94
  95         return std_scan_complete(di, g_slist_append(NULL, sdi));
  96 }
  97
  98 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
  99                 const struct sr_channel_group *cg)
 100 {
 101         int ret;
 102         double dblval;
 103
 104         (void)cg;
 105
 106         if (sdi->status != SR_ST_ACTIVE)
 107                 return SR_ERR_DEV_CLOSED;
 108
 109         switch (key) {
 110         case SR_CONF_VOLTAGE:
 111                 dblval = g_variant_get_double(data);
 112                 if ((dblval < 0.0) || (dblval > 35.0)) {
 113                         sr_err("Voltage out of range (0 - 35.0)!");
 114                         return SR_ERR_ARG;
 115                 }
 116                 ret = send_msg1(sdi, 'V', (int) (dblval * 10 + 0.5));
 117                 break;
 118         case SR_CONF_CURRENT:
 119                 dblval = g_variant_get_double(data);
 120                 if ((dblval < 0.01) || (dblval > 2.55)) {
 121                         sr_err("Current out of range (0 - 2.55)!");
 122                         return SR_ERR_ARG;
 123                 }
 124                 ret = send_msg1(sdi, 'C', (int) (dblval * 100 + 0.5));
 125                 break;
 126         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 127                 if (g_variant_get_boolean(data))
 128                         ret = send_msg1(sdi, 'V', 900);
 129                 else /* Constant current mode */
 130                         ret = send_msg1(sdi, 'V', 901);
 131                 break;
 132         default:
 133                 ret = SR_ERR_NA;
 134         }
 135
 136         return ret;
 137 }
 138
 139 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 140                 const struct sr_channel_group *cg)
 141 {
 142         int ret;
 143
 144         (void)sdi;
 145         (void)cg;
 146
 147         ret = SR_OK;
 148         switch (key) {
 149         case SR_CONF_SCAN_OPTIONS:
 150                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 151                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 152                 break;
 153         case SR_CONF_DEVICE_OPTIONS:
 154                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 155                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 156                 break;
 157         default:
 158                 return SR_ERR_NA;
 159         }
 160
 161         return ret;
 162 }
 163
 164 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 165 {
 166         (void)sdi;
 167
 168         return SR_OK;
 169 }
 170
 171 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 172 {
 173         (void)sdi;
 174
 175         return SR_OK;
 176 }
 177
 178 static struct sr_dev_driver conrad_digi_35_cpu_driver_info = {
 179         .name = "conrad-digi-35-cpu",
 180         .longname = "Conrad DIGI 35 CPU",
 181         .api_version = 1,
 182         .init = std_init,
 183         .cleanup = std_cleanup,
 184         .scan = scan,
 185         .dev_list = std_dev_list,
 186         .dev_clear = NULL,
 187         .config_get = NULL,
 188         .config_set = config_set,
 189         .config_list = config_list,
 190         .dev_open = std_serial_dev_open,
 191         .dev_close = std_serial_dev_close,
 192         .dev_acquisition_start = dev_acquisition_start,
 193         .dev_acquisition_stop = dev_acquisition_stop,
 194         .context = NULL,
 195 };
 196 SR_REGISTER_DEV_DRIVER(conrad_digi_35_cpu_driver_info);