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         switch (key) {
 107         case SR_CONF_VOLTAGE:
 108                 dblval = g_variant_get_double(data);
 109                 if ((dblval < 0.0) || (dblval > 35.0)) {
 110                         sr_err("Voltage out of range (0 - 35.0)!");
 111                         return SR_ERR_ARG;
 112                 }
 113                 ret = send_msg1(sdi, 'V', (int) (dblval * 10 + 0.5));
 114                 break;
 115         case SR_CONF_CURRENT:
 116                 dblval = g_variant_get_double(data);
 117                 if ((dblval < 0.01) || (dblval > 2.55)) {
 118                         sr_err("Current out of range (0 - 2.55)!");
 119                         return SR_ERR_ARG;
 120                 }
 121                 ret = send_msg1(sdi, 'C', (int) (dblval * 100 + 0.5));
 122                 break;
 123         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 124                 if (g_variant_get_boolean(data))
 125                         ret = send_msg1(sdi, 'V', 900);
 126                 else /* Constant current mode */
 127                         ret = send_msg1(sdi, 'V', 901);
 128                 break;
 129         default:
 130                 ret = SR_ERR_NA;
 131         }
 132
 133         return ret;
 134 }
 135
 136 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 137                 const struct sr_channel_group *cg)
 138 {
 139         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, NULL, devopts);
 140 }
 141
 142 static struct sr_dev_driver conrad_digi_35_cpu_driver_info = {
 143         .name = "conrad-digi-35-cpu",
 144         .longname = "Conrad DIGI 35 CPU",
 145         .api_version = 1,
 146         .init = std_init,
 147         .cleanup = std_cleanup,
 148         .scan = scan,
 149         .dev_list = std_dev_list,
 150         .dev_clear = std_dev_clear,
 151         .config_get = NULL,
 152         .config_set = config_set,
 153         .config_list = config_list,
 154         .dev_open = std_serial_dev_open,
 155         .dev_close = std_serial_dev_close,
 156         .dev_acquisition_start = std_dummy_dev_acquisition_start,
 157         .dev_acquisition_stop = std_dummy_dev_acquisition_stop,
 158         .context = NULL,
 159 };
 160 SR_REGISTER_DEV_DRIVER(conrad_digi_35_cpu_driver_info);