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1 /*
2  * This file is part of the libsigrok project.
3  *
4  * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
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 2 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_temp[] = {
29         SR_CONF_THERMOMETER,
30 };
31
32 static const uint32_t drvopts_temp_hum[] = {
33         SR_CONF_THERMOMETER,
34         SR_CONF_HYGROMETER,
35 };
36
37 static const uint32_t devopts[] = {
38         SR_CONF_CONTINUOUS,
39         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
40         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
41 };
42
43 static struct sr_dev_driver mic_98581_driver_info;
44 static struct sr_dev_driver mic_98583_driver_info;
45
46 SR_PRIV const struct mic_dev_info mic_devs[] = {
47         {
48                 "MIC", "98581", "38400/8n2", 32000, TRUE, FALSE, 6,
49                 packet_valid_temp,
50                 &mic_98581_driver_info, receive_data_MIC_98581,
51         },
52         {
53                 "MIC", "98583", "38400/8n2", 32000, TRUE, TRUE, 10,
54                 packet_valid_temp_hum,
55                 &mic_98583_driver_info, receive_data_MIC_98583,
56         },
57 };
58
59 static GSList *mic_scan(const char *conn, const char *serialcomm, int idx)
60 {
61         struct sr_dev_inst *sdi;
62         struct dev_context *devc;
63         struct sr_serial_dev_inst *serial;
64
65         serial = sr_serial_dev_inst_new(conn, serialcomm);
66
67         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
68                 return NULL;
69
70         /* TODO: Query device type. */
71         // ret = mic_cmd_get_device_info(serial);
72
73         sr_info("Found device on port %s.", conn);
74
75         /* TODO: Fill in version from protocol response. */
76         sdi = g_malloc0(sizeof(struct sr_dev_inst));
77         sdi->status = SR_ST_INACTIVE;
78         sdi->vendor = g_strdup(mic_devs[idx].vendor);
79         sdi->model = g_strdup(mic_devs[idx].device);
80         devc = g_malloc0(sizeof(struct dev_context));
81         sr_sw_limits_init(&devc->limits);
82         sdi->inst_type = SR_INST_SERIAL;
83         sdi->conn = serial;
84         sdi->priv = devc;
85
86         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "Temperature");
87
88         if (mic_devs[idx].has_humidity)
89                 sr_channel_new(sdi, 1, SR_CHANNEL_ANALOG, TRUE, "Humidity");
90
91         serial_close(serial);
92
93         return std_scan_complete(mic_devs[idx].di, g_slist_append(NULL, sdi));
94 }
95
96 static GSList *scan(GSList *options, int idx)
97 {
98         struct sr_config *src;
99         GSList *l, *devices;
100         const char *conn, *serialcomm;
101
102         conn = serialcomm = NULL;
103         for (l = options; l; l = l->next) {
104                 src = l->data;
105                 switch (src->key) {
106                 case SR_CONF_CONN:
107                         conn = g_variant_get_string(src->data, NULL);
108                         break;
109                 case SR_CONF_SERIALCOMM:
110                         serialcomm = g_variant_get_string(src->data, NULL);
111                         break;
112                 }
113         }
114         if (!conn)
115                 return NULL;
116
117         if (serialcomm)
118                 devices = mic_scan(conn, serialcomm, idx);
119         else
120                 devices = mic_scan(conn, mic_devs[idx].conn, idx);
121
122         return devices;
123 }
124
125 static int config_set(uint32_t key, GVariant *data,
126         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
127 {
128         struct dev_context *devc;
129
130         (void)cg;
131
132         devc = sdi->priv;
133
134         return sr_sw_limits_config_set(&devc->limits, key, data);
135 }
136
137 static int config_list(uint32_t key, GVariant **data,
138         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg, int idx)
139 {
140         /*
141          * We can't use the ternary operator here! The result would contain
142          * sizeof((cond) ? A : B) where A/B are arrays of different type/size.
143          * The ternary operator always returns the "common" type of A and B,
144          * which would be a pointer instead of either the A or B arrays.
145          * Thus, sizeof() would yield the size of a pointer, not the size
146          * of either the A or B array, which is not what we want.
147          */
148         if (mic_devs[idx].has_humidity)
149                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts_temp_hum, devopts);
150         else
151                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts_temp, devopts);
152 }
153
154 static int dev_acquisition_start(const struct sr_dev_inst *sdi, int idx)
155 {
156         struct dev_context *devc;
157         struct sr_serial_dev_inst *serial;
158
159         devc = sdi->priv;
160
161         sr_sw_limits_acquisition_start(&devc->limits);
162         std_session_send_df_header(sdi);
163
164         serial = sdi->conn;
165         serial_source_add(sdi->session, serial, G_IO_IN, 100,
166                       mic_devs[idx].receive_data, (void *)sdi);
167
168         return SR_OK;
169 }
170
171 /* Driver-specific API function wrappers */
172 #define HW_SCAN(X) \
173 static GSList *scan_##X(struct sr_dev_driver *di, GSList *options) { \
174         (void)di; return scan(options, X); }
175 #define HW_CONFIG_LIST(X) \
176 static int config_list_##X(uint32_t key, GVariant **data, \
177 const struct sr_dev_inst *sdi, const struct sr_channel_group *cg) { \
178 return config_list(key, data, sdi, cg, X); }
179 #define HW_DEV_ACQUISITION_START(X) \
180 static int dev_acquisition_start_##X(const struct sr_dev_inst *sdi \
181 ) { return dev_acquisition_start(sdi, X); }
182
183 /* Driver structs and API function wrappers */
184 #define DRV(ID, ID_UPPER, NAME, LONGNAME) \
185 HW_SCAN(ID_UPPER) \
186 HW_CONFIG_LIST(ID_UPPER) \
187 HW_DEV_ACQUISITION_START(ID_UPPER) \
188 static struct sr_dev_driver ID##_driver_info = { \
189         .name = NAME, \
190         .longname = LONGNAME, \
191         .api_version = 1, \
192         .init = std_init, \
193         .cleanup = std_cleanup, \
194         .scan = scan_##ID_UPPER, \
195         .dev_list = std_dev_list, \
196         .dev_clear = std_dev_clear, \
197         .config_get = NULL, \
198         .config_set = config_set, \
199         .config_list = config_list_##ID_UPPER, \
200         .dev_open = std_serial_dev_open, \
201         .dev_close = std_serial_dev_close, \
202         .dev_acquisition_start = dev_acquisition_start_##ID_UPPER, \
203         .dev_acquisition_stop = std_serial_dev_acquisition_stop, \
204         .context = NULL, \
205 }; \
206 SR_REGISTER_DEV_DRIVER(ID##_driver_info)
207
208 DRV(mic_98581, MIC_98581, "mic-98581", "MIC 98581")
209 DRV(mic_98583, MIC_98583, "mic-98583", "MIC 98583")