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std_serial_dev_acquisition_stop(): Remove serial parameter
[libsigrok.git] / src / hardware / kern-scale / api.c
1 /*
2  * This file is part of the libsigrok project.
3  *
4  * Copyright (C) 2015 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, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
19  */
20
21 #include <config.h>
22 #include <glib.h>
23 #include <libsigrok/libsigrok.h>
24 #include "libsigrok-internal.h"
25 #include "protocol.h"
26
27 static const uint32_t scanopts[] = {
28         SR_CONF_CONN,
29         SR_CONF_SERIALCOMM,
30 };
31
32 static const uint32_t devopts[] = {
33         SR_CONF_SCALE,
34         SR_CONF_CONTINUOUS,
35         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
36         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
37 };
38
39 static GSList *scan(struct sr_dev_driver *di, GSList *options)
40 {
41         struct scale_info *scale;
42         struct sr_config *src;
43         GSList *l, *devices;
44         const char *conn, *serialcomm;
45         struct sr_dev_inst *sdi;
46         struct dev_context *devc;
47         struct sr_serial_dev_inst *serial;
48         int ret;
49         size_t len;
50         uint8_t buf[128];
51
52         scale = (struct scale_info *)di;
53
54         conn = serialcomm = NULL;
55         for (l = options; l; l = l->next) {
56                 src = l->data;
57                 switch (src->key) {
58                 case SR_CONF_CONN:
59                         conn = g_variant_get_string(src->data, NULL);
60                         break;
61                 case SR_CONF_SERIALCOMM:
62                         serialcomm = g_variant_get_string(src->data, NULL);
63                         break;
64                 }
65         }
66         if (!conn)
67                 return NULL;
68
69         if (!serialcomm)
70                 serialcomm = scale->conn;
71
72         serial = sr_serial_dev_inst_new(conn, serialcomm);
73
74         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
75                 return NULL;
76
77         sr_info("Probing serial port %s.", conn);
78
79         devices = NULL;
80         serial_flush(serial);
81
82         sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
83         if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
84                 goto scan_cleanup;
85         /* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
86
87         /* Let's get a bit of data and see if we can find a packet. */
88         len = sizeof(buf);
89         ret = serial_stream_detect(serial, buf, &len, scale->packet_size,
90                                    scale->packet_valid, 3000, scale->baudrate);
91         if (ret != SR_OK)
92                 goto scan_cleanup;
93
94         sr_info("Found device on port %s.", conn);
95
96         sdi = g_malloc0(sizeof(struct sr_dev_inst));
97         sdi->status = SR_ST_INACTIVE;
98         sdi->vendor = g_strdup(scale->vendor);
99         sdi->model = g_strdup(scale->device);
100         devc = g_malloc0(sizeof(struct dev_context));
101         sr_sw_limits_init(&devc->limits);
102         sdi->inst_type = SR_INST_SERIAL;
103         sdi->conn = serial;
104         sdi->priv = devc;
105         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "Mass");
106         devices = g_slist_append(devices, sdi);
107
108 scan_cleanup:
109         serial_close(serial);
110
111         return std_scan_complete(di, devices);
112 }
113
114 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
115                 const struct sr_channel_group *cg)
116 {
117         struct dev_context *devc;
118
119         (void)cg;
120
121         if (sdi->status != SR_ST_ACTIVE)
122                 return SR_ERR_DEV_CLOSED;
123
124         devc = sdi->priv;
125
126         return sr_sw_limits_config_set(&devc->limits, key, data);
127 }
128
129 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
130                 const struct sr_channel_group *cg)
131 {
132         (void)sdi;
133         (void)cg;
134
135         switch (key) {
136         case SR_CONF_SCAN_OPTIONS:
137                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
138                         scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
139                 break;
140         case SR_CONF_DEVICE_OPTIONS:
141                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
142                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
143                 break;
144         default:
145                 return SR_ERR_NA;
146         }
147
148         return SR_OK;
149 }
150
151 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
152 {
153         struct dev_context *devc;
154         struct sr_serial_dev_inst *serial;
155
156         if (sdi->status != SR_ST_ACTIVE)
157                 return SR_ERR_DEV_CLOSED;
158
159         devc = sdi->priv;
160         serial = sdi->conn;
161
162         sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
163         if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
164                 return SR_ERR;
165         /* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
166
167         sr_sw_limits_acquisition_start(&devc->limits);
168         std_session_send_df_header(sdi);
169
170         /* Poll every 50ms, or whenever some data comes in. */
171         serial_source_add(sdi->session, serial, G_IO_IN, 50,
172                       kern_scale_receive_data, (void *)sdi);
173
174         return SR_OK;
175 }
176
177 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
178 {
179         return std_serial_dev_acquisition_stop(sdi, std_serial_dev_close);
180 }
181
182 #define SCALE(ID, CHIPSET, VENDOR, MODEL, CONN, BAUDRATE, PACKETSIZE, \
183                         VALID, PARSE) \
184         &((struct scale_info) { \
185                 { \
186                         .name = ID, \
187                         .longname = VENDOR " " MODEL, \
188                         .api_version = 1, \
189                         .init = std_init, \
190                         .cleanup = std_cleanup, \
191                         .scan = scan, \
192                         .dev_list = std_dev_list, \
193                         .config_get = NULL, \
194                         .config_set = config_set, \
195                         .config_list = config_list, \
196                         .dev_open = std_serial_dev_open, \
197                         .dev_close = std_serial_dev_close, \
198                         .dev_acquisition_start = dev_acquisition_start, \
199                         .dev_acquisition_stop = dev_acquisition_stop, \
200                         .context = NULL, \
201                 }, \
202                 VENDOR, MODEL, CONN, BAUDRATE, PACKETSIZE, \
203                 VALID, PARSE, sizeof(struct CHIPSET##_info) \
204         }).di
205
206 /*
207  * Some scales have (user-configurable) 14-byte or 15-byte packets.
208  * We transparently support both variants by specifying the larger value
209  * below and due to the way the stream parser works.
210  *
211  * The scales have a standard baudrate (model dependent) as listed below,
212  * but serial parameters are user-configurable. We support that by letting
213  * the user override them via "serialcomm".
214  */
215
216 SR_REGISTER_DEV_DRIVER_LIST(kern_scale_drivers,
217         SCALE(
218                 "kern-ew-6200-2nm", kern,
219                 "KERN", "EW 6200-2NM", "1200/8n2", 1200,
220                 15 /* (or 14) */, sr_kern_packet_valid, sr_kern_parse
221         )
222 );