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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, LOG_PREFIX); | |
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 | sdi->conn, LOG_PREFIX); | |
181 | } | |
182 | ||
183 | #define SCALE(ID, CHIPSET, VENDOR, MODEL, CONN, BAUDRATE, PACKETSIZE, \ | |
184 | VALID, PARSE) \ | |
185 | &((struct scale_info) { \ | |
186 | { \ | |
187 | .name = ID, \ | |
188 | .longname = VENDOR " " MODEL, \ | |
189 | .api_version = 1, \ | |
190 | .init = std_init, \ | |
191 | .cleanup = std_cleanup, \ | |
192 | .scan = scan, \ | |
193 | .dev_list = std_dev_list, \ | |
194 | .config_get = NULL, \ | |
195 | .config_set = config_set, \ | |
196 | .config_list = config_list, \ | |
197 | .dev_open = std_serial_dev_open, \ | |
198 | .dev_close = std_serial_dev_close, \ | |
199 | .dev_acquisition_start = dev_acquisition_start, \ | |
200 | .dev_acquisition_stop = dev_acquisition_stop, \ | |
201 | .context = NULL, \ | |
202 | }, \ | |
203 | VENDOR, MODEL, CONN, BAUDRATE, PACKETSIZE, \ | |
204 | VALID, PARSE, sizeof(struct CHIPSET##_info) \ | |
205 | }).di | |
206 | ||
207 | /* | |
208 | * Some scales have (user-configurable) 14-byte or 15-byte packets. | |
209 | * We transparently support both variants by specifying the larger value | |
210 | * below and due to the way the stream parser works. | |
211 | * | |
212 | * The scales have a standard baudrate (model dependent) as listed below, | |
213 | * but serial parameters are user-configurable. We support that by letting | |
214 | * the user override them via "serialcomm". | |
215 | */ | |
216 | ||
217 | SR_REGISTER_DEV_DRIVER_LIST(kern_scale_drivers, | |
218 | SCALE( | |
219 | "kern-ew-6200-2nm", kern, | |
220 | "KERN", "EW 6200-2NM", "1200/8n2", 1200, | |
221 | 15 /* (or 14) */, sr_kern_packet_valid, sr_kern_parse | |
222 | ) | |
223 | ); |