src/hardware/brymen-dmm/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
   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 #include <config.h>
  21 #include "protocol.h"
  22
  23 static const uint32_t scanopts[] = {
  24         SR_CONF_CONN,
  25         SR_CONF_SERIALCOMM,
  26 };
  27
  28 static const uint32_t drvopts[] = {
  29         SR_CONF_MULTIMETER,
  30 };
  31
  32 static const uint32_t devopts[] = {
  33         SR_CONF_CONTINUOUS,
  34         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  35         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  36 };
  37
  38 static GSList *brymen_scan(struct sr_dev_driver *di, const char *conn,
  39         const char *serialcomm)
  40 {
  41         struct sr_dev_inst *sdi;
  42         struct dev_context *devc;
  43         struct sr_serial_dev_inst *serial;
  44         GSList *devices;
  45         int ret;
  46         uint8_t buf[128];
  47         size_t len;
  48
  49         serial = sr_serial_dev_inst_new(conn, serialcomm);
  50
  51         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
  52                 return NULL;
  53
  54         sr_info("Probing port %s.", conn);
  55
  56         devices = NULL;
  57
  58         /* Request reading */
  59         if ((ret = brymen_packet_request(serial)) < 0) {
  60                 sr_err("Unable to send command: %d.", ret);
  61                 goto scan_cleanup;
  62         }
  63
  64         len = sizeof(buf);
  65         ret = brymen_stream_detect(serial, buf, &len, brymen_packet_length,
  66                              brymen_packet_is_valid, 1000, 9600);
  67         if (ret != SR_OK)
  68                 goto scan_cleanup;
  69
  70         sr_info("Found device on port %s.", conn);
  71
  72         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  73         sdi->status = SR_ST_INACTIVE;
  74         sdi->vendor = g_strdup("Brymen");
  75         sdi->model = g_strdup("BM85x");
  76         devc = g_malloc0(sizeof(struct dev_context));
  77         sr_sw_limits_init(&devc->sw_limits);
  78         sdi->inst_type = SR_INST_SERIAL;
  79         sdi->conn = serial;
  80         sdi->priv = devc;
  81         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
  82         devices = g_slist_append(devices, sdi);
  83
  84 scan_cleanup:
  85         serial_close(serial);
  86
  87         return std_scan_complete(di, devices);
  88 }
  89
  90 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  91 {
  92         struct sr_config *src;
  93         GSList *devices, *l;
  94         const char *conn, *serialcomm;
  95
  96         devices = NULL;
  97
  98         conn = serialcomm = NULL;
  99         for (l = options; l; l = l->next) {
 100                 src = l->data;
 101                 switch (src->key) {
 102                 case SR_CONF_CONN:
 103                         conn = g_variant_get_string(src->data, NULL);
 104                         break;
 105                 case SR_CONF_SERIALCOMM:
 106                         serialcomm = g_variant_get_string(src->data, NULL);
 107                         break;
 108                 }
 109         }
 110         if (!conn)
 111                 return NULL;
 112
 113         if (serialcomm)
 114                 devices = brymen_scan(di, conn, serialcomm);
 115         else
 116                 devices = brymen_scan(di, conn, "9600/8n1/dtr=1/rts=1");
 117
 118         return devices;
 119 }
 120
 121 static int config_set(uint32_t key, GVariant *data,
 122         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 123 {
 124         struct dev_context *devc;
 125
 126         (void)cg;
 127
 128         devc = sdi->priv;
 129
 130         return sr_sw_limits_config_set(&devc->sw_limits, key, data);
 131 }
 132
 133 static int config_list(uint32_t key, GVariant **data,
 134         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 135 {
 136         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 137 }
 138
 139 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 140 {
 141         struct dev_context *devc;
 142         struct sr_serial_dev_inst *serial;
 143
 144         devc = sdi->priv;
 145
 146         sr_sw_limits_acquisition_start(&devc->sw_limits);
 147         std_session_send_df_header(sdi);
 148
 149         serial = sdi->conn;
 150         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 151                         brymen_dmm_receive_data, (void *)sdi);
 152
 153         return SR_OK;
 154 }
 155
 156 static struct sr_dev_driver brymen_bm857_driver_info = {
 157         .name = "brymen-bm857",
 158         .longname = "Brymen BM857",
 159         .api_version = 1,
 160         .init = std_init,
 161         .cleanup = std_cleanup,
 162         .scan = scan,
 163         .dev_list = std_dev_list,
 164         .dev_clear = std_dev_clear,
 165         .config_get = NULL,
 166         .config_set = config_set,
 167         .config_list = config_list,
 168         .dev_open = std_serial_dev_open,
 169         .dev_close = std_serial_dev_close,
 170         .dev_acquisition_start = dev_acquisition_start,
 171         .dev_acquisition_stop = std_serial_dev_acquisition_stop,
 172         .context = NULL,
 173 };
 174 SR_REGISTER_DEV_DRIVER(brymen_bm857_driver_info);