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 devopts[] = {
  29         SR_CONF_MULTIMETER,
  30         SR_CONF_CONTINUOUS,
  31         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  32         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  33 };
  34
  35 static GSList *brymen_scan(struct sr_dev_driver *di, const char *conn,
  36         const char *serialcomm)
  37 {
  38         struct sr_dev_inst *sdi;
  39         struct dev_context *devc;
  40         struct sr_serial_dev_inst *serial;
  41         GSList *devices;
  42         int ret;
  43         uint8_t buf[128];
  44         size_t len;
  45
  46         serial = sr_serial_dev_inst_new(conn, serialcomm);
  47
  48         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
  49                 return NULL;
  50
  51         sr_info("Probing port %s.", conn);
  52
  53         devices = NULL;
  54
  55         /* Request reading */
  56         if ((ret = brymen_packet_request(serial)) < 0) {
  57                 sr_err("Unable to send command: %d.", ret);
  58                 goto scan_cleanup;
  59         }
  60
  61         len = 128;
  62         ret = brymen_stream_detect(serial, buf, &len, brymen_packet_length,
  63                              brymen_packet_is_valid, 1000, 9600);
  64         if (ret != SR_OK)
  65                 goto scan_cleanup;
  66
  67         sr_info("Found device on port %s.", conn);
  68
  69         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  70         sdi->status = SR_ST_INACTIVE;
  71         sdi->vendor = g_strdup("Brymen");
  72         sdi->model = g_strdup("BM85x");
  73         devc = g_malloc0(sizeof(struct dev_context));
  74         sr_sw_limits_init(&devc->sw_limits);
  75         sdi->inst_type = SR_INST_SERIAL;
  76         sdi->conn = serial;
  77         sdi->priv = devc;
  78         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
  79         devices = g_slist_append(devices, sdi);
  80
  81 scan_cleanup:
  82         serial_close(serial);
  83
  84         return std_scan_complete(di, devices);
  85 }
  86
  87 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  88 {
  89         struct sr_config *src;
  90         GSList *devices, *l;
  91         const char *conn, *serialcomm;
  92
  93         devices = NULL;
  94
  95         conn = serialcomm = NULL;
  96         for (l = options; l; l = l->next) {
  97                 src = l->data;
  98                 switch (src->key) {
  99                 case SR_CONF_CONN:
 100                         conn = g_variant_get_string(src->data, NULL);
 101                         break;
 102                 case SR_CONF_SERIALCOMM:
 103                         serialcomm = g_variant_get_string(src->data, NULL);
 104                         break;
 105                 }
 106         }
 107         if (!conn)
 108                 return NULL;
 109
 110         if (serialcomm) {
 111                 /* Use the provided comm specs. */
 112                 devices = brymen_scan(di, conn, serialcomm);
 113         } else {
 114                 /* But 9600/8n1 should work all of the time. */
 115                 devices = brymen_scan(di, conn, "9600/8n1/dtr=1/rts=1");
 116         }
 117
 118         return devices;
 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         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, const struct sr_dev_inst *sdi,
 134                 const struct sr_channel_group *cg)
 135 {
 136         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, NULL, 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         /* Poll every 50ms, or whenever some data comes in. */
 150         serial = sdi->conn;
 151         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 152                         brymen_dmm_receive_data, (void *)sdi);
 153
 154         return SR_OK;
 155 }
 156
 157 static struct sr_dev_driver brymen_bm857_driver_info = {
 158         .name = "brymen-bm857",
 159         .longname = "Brymen BM857",
 160         .api_version = 1,
 161         .init = std_init,
 162         .cleanup = std_cleanup,
 163         .scan = scan,
 164         .dev_list = std_dev_list,
 165         .dev_clear = std_dev_clear,
 166         .config_get = NULL,
 167         .config_set = config_set,
 168         .config_list = config_list,
 169         .dev_open = std_serial_dev_open,
 170         .dev_close = std_serial_dev_close,
 171         .dev_acquisition_start = dev_acquisition_start,
 172         .dev_acquisition_stop = std_serial_dev_acquisition_stop,
 173         .context = NULL,
 174 };
 175 SR_REGISTER_DEV_DRIVER(brymen_bm857_driver_info);