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         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
  87                 return NULL;
  88
  89         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
  90                 return NULL;
  91
  92         serial_flush(serial);
  93         serial_close(serial);
  94
  95         sr_spew("Conrad DIGI 35 CPU assumed at %s.", conn);
  96
  97         if (!(sdi = sr_dev_inst_new(SR_ST_ACTIVE, "Conrad", "DIGI 35 CPU", NULL)))
  98                 return NULL;
  99
 100         sdi->conn = serial;
 101         sdi->priv = NULL;
 102         sdi->driver = di;
 103         if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "CH1")))
 104                 return NULL;
 105         sdi->channels = g_slist_append(sdi->channels, ch);
 106
 107         drvc->instances = g_slist_append(drvc->instances, sdi);
 108         devices = g_slist_append(devices, sdi);
 109
 110         return devices;
 111 }
 112
 113 static GSList *dev_list(void)
 114 {
 115         return ((struct drv_context *)(di->priv))->instances;
 116 }
 117
 118 static int cleanup(void)
 119 {
 120         return std_dev_clear(di, NULL);
 121 }
 122
 123 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 124                 const struct sr_channel_group *cg)
 125 {
 126         int ret;
 127         double dblval;
 128
 129         (void)cg;
 130
 131         if (sdi->status != SR_ST_ACTIVE)
 132                 return SR_ERR_DEV_CLOSED;
 133
 134         ret = SR_OK;
 135         switch (key) {
 136         case SR_CONF_OUTPUT_VOLTAGE:
 137                 dblval = g_variant_get_double(data);
 138                 if ((dblval < 0.0) || (dblval > 35.0)) {
 139                         sr_err("Voltage out of range (0 - 35.0)!");
 140                         return SR_ERR_ARG;
 141                 }
 142                 ret = send_msg1(sdi, 'V', (int) (dblval * 10 + 0.5));
 143                 break;
 144         case SR_CONF_OUTPUT_CURRENT:
 145                 dblval = g_variant_get_double(data);
 146                 if ((dblval < 0.01) || (dblval > 2.55)) {
 147                         sr_err("Current out of range (0 - 2.55)!");
 148                         return SR_ERR_ARG;
 149                 }
 150                 ret = send_msg1(sdi, 'C', (int) (dblval * 100 + 0.5));
 151                 break;
 152         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 153                 if (g_variant_get_boolean(data))
 154                         ret = send_msg1(sdi, 'V', 900);
 155                 else /* Constant current mode */
 156                         ret = send_msg1(sdi, 'V', 901);
 157                 break;
 158         default:
 159                 ret = SR_ERR_NA;
 160         }
 161
 162         return ret;
 163 }
 164
 165 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 166                 const struct sr_channel_group *cg)
 167 {
 168         int ret;
 169
 170         (void)sdi;
 171         (void)cg;
 172
 173         ret = SR_OK;
 174         switch (key) {
 175         case SR_CONF_SCAN_OPTIONS:
 176                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 177                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 178                 break;
 179         case SR_CONF_DEVICE_OPTIONS:
 180                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 181                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 182                 break;
 183         default:
 184                 return SR_ERR_NA;
 185         }
 186
 187         return ret;
 188 }
 189
 190 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 191 {
 192         (void)cb_data;
 193
 194         if (sdi->status != SR_ST_ACTIVE)
 195                 return SR_ERR_DEV_CLOSED;
 196
 197         return SR_OK;
 198 }
 199
 200 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 201 {
 202         (void)cb_data;
 203
 204         if (sdi->status != SR_ST_ACTIVE)
 205                 return SR_ERR_DEV_CLOSED;
 206
 207         return SR_OK;
 208 }
 209
 210 SR_PRIV struct sr_dev_driver conrad_digi_35_cpu_driver_info = {
 211         .name = "conrad-digi-35-cpu",
 212         .longname = "Conrad DIGI 35 CPU",
 213         .api_version = 1,
 214         .init = init,
 215         .cleanup = cleanup,
 216         .scan = scan,
 217         .dev_list = dev_list,
 218         .dev_clear = NULL,
 219         .config_get = NULL,
 220         .config_set = config_set,
 221         .config_list = config_list,
 222         .dev_open = std_serial_dev_open,
 223         .dev_close = std_serial_dev_close,
 224         .dev_acquisition_start = dev_acquisition_start,
 225         .dev_acquisition_stop = dev_acquisition_stop,
 226         .priv = NULL,
 227 };