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 int32_t hwopts[] = {
  30         SR_CONF_CONN,
  31         SR_CONF_SERIALCOMM,
  32 };
  33
  34 static const int32_t hwcaps[] = {
  35         SR_CONF_POWER_SUPPLY,
  36         SR_CONF_OUTPUT_VOLTAGE,
  37         SR_CONF_OUTPUT_CURRENT,
  38         /* There's no SR_CONF_OUTPUT_ENABLED; can't know/set status remotely. */
  39         SR_CONF_OVER_CURRENT_PROTECTION,
  40 };
  41
  42 SR_PRIV struct sr_dev_driver conrad_digi_35_cpu_driver_info;
  43 static struct sr_dev_driver *di = &conrad_digi_35_cpu_driver_info;
  44
  45 static int init(struct sr_context *sr_ctx)
  46 {
  47         return std_init(sr_ctx, di, LOG_PREFIX);
  48 }
  49
  50 static GSList *scan(GSList *options)
  51 {
  52         struct sr_dev_inst *sdi;
  53         struct drv_context *drvc;
  54         struct sr_config *src;
  55         struct sr_channel *ch;
  56         struct sr_serial_dev_inst *serial;
  57         GSList *l, *devices;
  58         const char *conn, *serialcomm;
  59
  60         devices = NULL;
  61         drvc = di->priv;
  62         drvc->instances = NULL;
  63         conn = serialcomm = NULL;
  64
  65         for (l = options; l; l = l->next) {
  66                 src = l->data;
  67                 switch (src->key) {
  68                 case SR_CONF_CONN:
  69                         conn = g_variant_get_string(src->data, NULL);
  70                         break;
  71                 case SR_CONF_SERIALCOMM:
  72                         serialcomm = g_variant_get_string(src->data, NULL);
  73                         break;
  74                 }
  75         }
  76         if (!conn)
  77                 return NULL;
  78         if (!serialcomm)
  79                 serialcomm = SERIALCOMM;
  80
  81         /*
  82          * We cannot scan for this device because it is write-only.
  83          * So just check that the port parameters are valid and assume that
  84          * the device is there.
  85          */
  86
  87         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
  88                 return NULL;
  89
  90         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
  91                 return NULL;
  92
  93         serial_flush(serial);
  94         serial_close(serial);
  95
  96         sr_spew("Conrad DIGI 35 CPU assumed at %s.", conn);
  97
  98         if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "Conrad", "DIGI 35 CPU", NULL)))
  99                 return NULL;
 100
 101         sdi->conn = serial;
 102         sdi->priv = NULL;
 103         sdi->driver = di;
 104         if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "CH1")))
 105                 return NULL;
 106         sdi->channels = g_slist_append(sdi->channels, ch);
 107
 108         drvc->instances = g_slist_append(drvc->instances, sdi);
 109         devices = g_slist_append(devices, sdi);
 110
 111         return devices;
 112 }
 113
 114 static GSList *dev_list(void)
 115 {
 116         return ((struct drv_context *)(di->priv))->instances;
 117 }
 118
 119 static int cleanup(void)
 120 {
 121         return std_dev_clear(di, NULL);
 122 }
 123
 124 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
 125                 const struct sr_channel_group *cg)
 126 {
 127         int ret;
 128         double dblval;
 129
 130         (void)cg;
 131
 132         if (sdi->status != SR_ST_ACTIVE)
 133                 return SR_ERR_DEV_CLOSED;
 134
 135         ret = SR_OK;
 136         switch (key) {
 137         case SR_CONF_OUTPUT_VOLTAGE:
 138                 dblval = g_variant_get_double(data);
 139                 if ((dblval < 0.0) || (dblval > 35.0)) {
 140                         sr_err("Voltage out of range (0 - 35.0)!");
 141                         return SR_ERR_ARG;
 142                 }
 143                 ret = send_msg1(sdi, 'V', (int) (dblval * 10 + 0.5));
 144                 break;
 145         case SR_CONF_OUTPUT_CURRENT:
 146                 dblval = g_variant_get_double(data);
 147                 if ((dblval < 0.01) || (dblval > 2.55)) {
 148                         sr_err("Current out of range (0 - 2.55)!");
 149                         return SR_ERR_ARG;
 150                 }
 151                 ret = send_msg1(sdi, 'C', (int) (dblval * 100 + 0.5));
 152                 break;
 153         /* No SR_CONF_OUTPUT_ENABLED :-( . */
 154         case SR_CONF_OVER_CURRENT_PROTECTION:
 155                 if (g_variant_get_boolean(data))
 156                         ret = send_msg1(sdi, 'V', 900);
 157                 else /* Constant current mode */
 158                         ret = send_msg1(sdi, 'V', 901);
 159                 break;
 160         default:
 161                 ret = SR_ERR_NA;
 162         }
 163
 164         return ret;
 165 }
 166
 167 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 168                 const struct sr_channel_group *cg)
 169 {
 170         int ret;
 171
 172         (void)sdi;
 173         (void)cg;
 174
 175         ret = SR_OK;
 176         switch (key) {
 177         case SR_CONF_SCAN_OPTIONS:
 178                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 179                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 180                 break;
 181         case SR_CONF_DEVICE_OPTIONS:
 182                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 183                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 184                 break;
 185         default:
 186                 return SR_ERR_NA;
 187         }
 188
 189         return ret;
 190 }
 191
 192 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 193 {
 194         (void)cb_data;
 195
 196         if (sdi->status != SR_ST_ACTIVE)
 197                 return SR_ERR_DEV_CLOSED;
 198
 199         return SR_OK;
 200 }
 201
 202 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 203 {
 204         (void)cb_data;
 205
 206         if (sdi->status != SR_ST_ACTIVE)
 207                 return SR_ERR_DEV_CLOSED;
 208
 209         return SR_OK;
 210 }
 211
 212 SR_PRIV struct sr_dev_driver conrad_digi_35_cpu_driver_info = {
 213         .name = "conrad-digi-35-cpu",
 214         .longname = "Conrad DIGI 35 CPU",
 215         .api_version = 1,
 216         .init = init,
 217         .cleanup = cleanup,
 218         .scan = scan,
 219         .dev_list = dev_list,
 220         .dev_clear = NULL,
 221         .config_get = NULL,
 222         .config_set = config_set,
 223         .config_list = config_list,
 224         .dev_open = std_serial_dev_open,
 225         .dev_close = std_serial_dev_close,
 226         .dev_acquisition_start = dev_acquisition_start,
 227         .dev_acquisition_stop = dev_acquisition_stop,
 228         .priv = NULL,
 229 };