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 "protocol.h"
  26
  27 #define SERIALCOMM "9600/8n1"
  28
  29 static const uint32_t scanopts[] = {
  30         SR_CONF_CONN,
  31         SR_CONF_SERIALCOMM,
  32 };
  33
  34 static const uint32_t devopts[] = {
  35         SR_CONF_POWER_SUPPLY,
  36         SR_CONF_OUTPUT_VOLTAGE | SR_CONF_SET,
  37         SR_CONF_OUTPUT_CURRENT | SR_CONF_SET,
  38         SR_CONF_OVER_CURRENT_PROTECTION_ENABLED | SR_CONF_SET,
  39 };
  40
  41 SR_PRIV struct sr_dev_driver conrad_digi_35_cpu_driver_info;
  42 static struct sr_dev_driver *di = &conrad_digi_35_cpu_driver_info;
  43
  44 static int init(struct sr_context *sr_ctx)
  45 {
  46         return std_init(sr_ctx, di, LOG_PREFIX);
  47 }
  48
  49 static GSList *scan(GSList *options)
  50 {
  51         struct sr_dev_inst *sdi;
  52         struct drv_context *drvc;
  53         struct sr_config *src;
  54         struct sr_channel *ch;
  55         struct sr_serial_dev_inst *serial;
  56         GSList *l, *devices;
  57         const char *conn, *serialcomm;
  58
  59         devices = NULL;
  60         drvc = di->priv;
  61         drvc->instances = NULL;
  62         conn = serialcomm = NULL;
  63
  64         for (l = options; l; l = l->next) {
  65                 src = l->data;
  66                 switch (src->key) {
  67                 case SR_CONF_CONN:
  68                         conn = g_variant_get_string(src->data, NULL);
  69                         break;
  70                 case SR_CONF_SERIALCOMM:
  71                         serialcomm = g_variant_get_string(src->data, NULL);
  72                         break;
  73                 }
  74         }
  75         if (!conn)
  76                 return NULL;
  77         if (!serialcomm)
  78                 serialcomm = SERIALCOMM;
  79
  80         /*
  81          * We cannot scan for this device because it is write-only.
  82          * So just check that the port parameters are valid and assume that
  83          * the device is there.
  84          */
  85
  86         serial = sr_serial_dev_inst_new(conn, serialcomm);
  87
  88         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
  89                 return NULL;
  90
  91         serial_flush(serial);
  92         serial_close(serial);
  93
  94         sr_spew("Conrad DIGI 35 CPU assumed at %s.", conn);
  95
  96         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  97         sdi->status = SR_ST_ACTIVE;
  98         sdi->vendor = g_strdup("Conrad");
  99         sdi->model = g_strdup("DIGI 35 CPU");
 100         sdi->conn = serial;
 101         sdi->priv = NULL;
 102         sdi->driver = di;
 103         ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "CH1");
 104         sdi->channels = g_slist_append(sdi->channels, ch);
 105         drvc->instances = g_slist_append(drvc->instances, sdi);
 106         devices = g_slist_append(devices, sdi);
 107
 108         return devices;
 109 }
 110
 111 static GSList *dev_list(void)
 112 {
 113         return ((struct drv_context *)(di->priv))->instances;
 114 }
 115
 116 static int cleanup(void)
 117 {
 118         return std_dev_clear(di, NULL);
 119 }
 120
 121 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 122                 const struct sr_channel_group *cg)
 123 {
 124         int ret;
 125         double dblval;
 126
 127         (void)cg;
 128
 129         if (sdi->status != SR_ST_ACTIVE)
 130                 return SR_ERR_DEV_CLOSED;
 131
 132         ret = SR_OK;
 133         switch (key) {
 134         case SR_CONF_OUTPUT_VOLTAGE:
 135                 dblval = g_variant_get_double(data);
 136                 if ((dblval < 0.0) || (dblval > 35.0)) {
 137                         sr_err("Voltage out of range (0 - 35.0)!");
 138                         return SR_ERR_ARG;
 139                 }
 140                 ret = send_msg1(sdi, 'V', (int) (dblval * 10 + 0.5));
 141                 break;
 142         case SR_CONF_OUTPUT_CURRENT:
 143                 dblval = g_variant_get_double(data);
 144                 if ((dblval < 0.01) || (dblval > 2.55)) {
 145                         sr_err("Current out of range (0 - 2.55)!");
 146                         return SR_ERR_ARG;
 147                 }
 148                 ret = send_msg1(sdi, 'C', (int) (dblval * 100 + 0.5));
 149                 break;
 150         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 151                 if (g_variant_get_boolean(data))
 152                         ret = send_msg1(sdi, 'V', 900);
 153                 else /* Constant current mode */
 154                         ret = send_msg1(sdi, 'V', 901);
 155                 break;
 156         default:
 157                 ret = SR_ERR_NA;
 158         }
 159
 160         return ret;
 161 }
 162
 163 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 164                 const struct sr_channel_group *cg)
 165 {
 166         int ret;
 167
 168         (void)sdi;
 169         (void)cg;
 170
 171         ret = SR_OK;
 172         switch (key) {
 173         case SR_CONF_SCAN_OPTIONS:
 174                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 175                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 176                 break;
 177         case SR_CONF_DEVICE_OPTIONS:
 178                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 179                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 180                 break;
 181         default:
 182                 return SR_ERR_NA;
 183         }
 184
 185         return ret;
 186 }
 187
 188 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 189 {
 190         (void)cb_data;
 191
 192         if (sdi->status != SR_ST_ACTIVE)
 193                 return SR_ERR_DEV_CLOSED;
 194
 195         return SR_OK;
 196 }
 197
 198 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 199 {
 200         (void)cb_data;
 201
 202         if (sdi->status != SR_ST_ACTIVE)
 203                 return SR_ERR_DEV_CLOSED;
 204
 205         return SR_OK;
 206 }
 207
 208 SR_PRIV struct sr_dev_driver conrad_digi_35_cpu_driver_info = {
 209         .name = "conrad-digi-35-cpu",
 210         .longname = "Conrad DIGI 35 CPU",
 211         .api_version = 1,
 212         .init = init,
 213         .cleanup = cleanup,
 214         .scan = scan,
 215         .dev_list = dev_list,
 216         .dev_clear = NULL,
 217         .config_get = NULL,
 218         .config_set = config_set,
 219         .config_list = config_list,
 220         .dev_open = std_serial_dev_open,
 221         .dev_close = std_serial_dev_close,
 222         .dev_acquisition_start = dev_acquisition_start,
 223         .dev_acquisition_stop = dev_acquisition_stop,
 224         .priv = NULL,
 225 };