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1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 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 <stdlib.h> | |
22 | #include "sigrok.h" | |
23 | #include "sigrok-internal.h" | |
24 | ||
25 | #define MIN_NUM_SAMPLES 1 | |
26 | ||
27 | struct context { | |
28 | uint64_t limit_samples; | |
29 | uint64_t limit_msec; /* TODO: Implement. */ | |
30 | uint64_t num_samples; | |
31 | void *session_dev_id; | |
32 | }; | |
33 | ||
34 | static const int hwcaps[] = { | |
35 | SR_HWCAP_OSCILLOSCOPE, | |
36 | SR_HWCAP_LIMIT_SAMPLES, | |
37 | // SR_HWCAP_LIMIT_MSEC, | |
38 | // SR_HWCAP_CONTINUOUS, | |
39 | 0, | |
40 | }; | |
41 | ||
42 | static const char *probe_names[] = { | |
43 | "Probe", | |
44 | NULL, | |
45 | }; | |
46 | ||
47 | static GSList *dev_insts = NULL; | |
48 | ||
49 | /* Function prototypes. */ | |
50 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data); | |
51 | ||
52 | static int hw_init(const char *devinfo) | |
53 | { | |
54 | struct sr_dev_inst *sdi; | |
55 | struct context *ctx; | |
56 | int devcnt = 0; | |
57 | ||
58 | /* Avoid compiler warnings. */ | |
59 | (void)devinfo; /* TODO: This specifies the serial port to use. */ | |
60 | ||
61 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
62 | sr_err("va18b: %s: ctx malloc failed.", __func__); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | ctx->limit_samples = 0; | |
67 | ctx->limit_msec = 0; | |
68 | ctx->num_samples = 0; | |
69 | ctx->session_dev_id = NULL; | |
70 | ||
71 | if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE, | |
72 | "Mastech", "VA18B", ""))) { | |
73 | sr_err("va18b: %s: sr_dev_inst_new returned NULL.", __func__); | |
74 | return 0; | |
75 | } | |
76 | ||
77 | sdi->priv = ctx; | |
78 | dev_insts = g_slist_append(dev_insts, sdi); | |
79 | ||
80 | devcnt = 1; | |
81 | ||
82 | return devcnt; | |
83 | } | |
84 | ||
85 | static int hw_dev_open(int dev_index) | |
86 | { | |
87 | /* Avoid compiler warnings. */ | |
88 | (void)dev_index; | |
89 | ||
90 | /* TODO. */ | |
91 | ||
92 | return SR_OK; | |
93 | } | |
94 | ||
95 | static int hw_dev_close(int dev_index) | |
96 | { | |
97 | /* Avoid compiler warnings. */ | |
98 | (void)dev_index; | |
99 | ||
100 | /* TODO. */ | |
101 | ||
102 | return SR_OK; | |
103 | } | |
104 | ||
105 | static int hw_cleanup(void) | |
106 | { | |
107 | GSList *l; | |
108 | struct sr_dev_inst *sdi; | |
109 | struct context *ctx; | |
110 | ||
111 | /* Properly close and free all devices. */ | |
112 | for (l = dev_insts; l; l = l->next) { | |
113 | if (!(sdi = l->data)) { | |
114 | /* Log error, but continue cleaning up the rest. */ | |
115 | sr_err("va18b: %s: sdi was NULL, continuing.", | |
116 | __func__); | |
117 | continue; | |
118 | } | |
119 | if (!(ctx = sdi->priv)) { | |
120 | /* Log error, but continue cleaning up the rest. */ | |
121 | sr_err("va18b: %s: sdi->priv was NULL, continuing.", | |
122 | __func__); | |
123 | continue; | |
124 | } | |
125 | ||
126 | /* TODO. */ | |
127 | ||
128 | sr_dev_inst_free(sdi); | |
129 | } | |
130 | ||
131 | g_slist_free(dev_insts); | |
132 | dev_insts = NULL; | |
133 | ||
134 | return SR_OK; | |
135 | } | |
136 | ||
137 | static const void *hw_dev_info_get(int dev_index, int dev_info_id) | |
138 | { | |
139 | struct sr_dev_inst *sdi; | |
140 | struct context *ctx; | |
141 | const void *info; | |
142 | uint64_t tmp; | |
143 | int tmpint; | |
144 | ||
145 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) { | |
146 | sr_err("va18b: %s: sdi was NULL.", __func__); | |
147 | return NULL; | |
148 | } | |
149 | ||
150 | if (!(ctx = sdi->priv)) { | |
151 | sr_err("va18b: %s: sdi->priv was NULL.", __func__); | |
152 | return NULL; | |
153 | } | |
154 | ||
155 | sr_spew("va18b: %s: dev_index %d, dev_info_id %d.", __func__, | |
156 | dev_index, dev_info_id); | |
157 | ||
158 | switch (dev_info_id) { | |
159 | case SR_DI_INST: | |
160 | info = sdi; | |
161 | sr_spew("va18b: %s: Returning sdi.", __func__); | |
162 | break; | |
163 | case SR_DI_NUM_PROBES: | |
164 | tmpint = 1; | |
165 | info = (int *)tmpint; | |
166 | sr_spew("va18b: %s: Returning number of probes: 1.", __func__); | |
167 | break; | |
168 | case SR_DI_PROBE_NAMES: | |
169 | info = probe_names; | |
170 | sr_spew("va18b: %s: Returning probenames.", __func__); | |
171 | break; | |
172 | case SR_DI_CUR_SAMPLERATE: | |
173 | /* FIXME */ | |
174 | tmp = 1; | |
175 | info = (uint64_t *)&tmp; | |
176 | sr_spew("va18b: %s: Returning samplerate: %" PRIu64 "Hz.", | |
177 | __func__, tmp); | |
178 | break; | |
179 | default: | |
180 | /* Unknown device info ID, return NULL. */ | |
181 | sr_err("va18b: %s: Unknown device info ID: %d.", | |
182 | __func__, dev_info_id); | |
183 | info = NULL; | |
184 | break; | |
185 | } | |
186 | ||
187 | return info; | |
188 | } | |
189 | ||
190 | static int hw_dev_status_get(int dev_index) | |
191 | { | |
192 | struct sr_dev_inst *sdi; | |
193 | ||
194 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) { | |
195 | sr_err("va18b: %s: sdi was NULL, device not found.", __func__); | |
196 | return SR_ST_NOT_FOUND; | |
197 | } | |
198 | ||
199 | sr_dbg("va18b: Returning status: %d.", sdi->status); | |
200 | ||
201 | return sdi->status; | |
202 | } | |
203 | ||
204 | static const int *hw_hwcap_get_all(void) | |
205 | { | |
206 | sr_spew("va18b: Returning list of device capabilities."); | |
207 | ||
208 | return hwcaps; | |
209 | } | |
210 | ||
211 | static int hw_dev_config_set(int dev_index, int hwcap, const void *value) | |
212 | { | |
213 | struct sr_dev_inst *sdi; | |
214 | struct context *ctx; | |
215 | ||
216 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) { | |
217 | sr_err("va18b: %s: sdi was NULL.", __func__); | |
218 | return SR_ERR_BUG; | |
219 | } | |
220 | ||
221 | if (!(ctx = sdi->priv)) { | |
222 | sr_err("va18b: %s: sdi->priv was NULL.", __func__); | |
223 | return SR_ERR_BUG; | |
224 | } | |
225 | ||
226 | sr_spew("va18b: %s: dev_index %d, hwcap %d.", __func__, | |
227 | dev_index, hwcap); | |
228 | ||
229 | switch (hwcap) { | |
230 | case SR_HWCAP_PROBECONFIG: | |
231 | /* TODO: Required? */ | |
232 | break; | |
233 | case SR_HWCAP_LIMIT_MSEC: | |
234 | if (*(const uint64_t *)value == 0) { | |
235 | sr_err("va18b: %s: LIMIT_MSEC can't be 0.", __func__); | |
236 | return SR_ERR; | |
237 | } | |
238 | ctx->limit_msec = *(const uint64_t *)value; | |
239 | sr_dbg("va18b: Setting LIMIT_MSEC to %" PRIu64 ".", | |
240 | ctx->limit_msec); | |
241 | break; | |
242 | case SR_HWCAP_LIMIT_SAMPLES: | |
243 | if (*(const uint64_t *)value < MIN_NUM_SAMPLES) { | |
244 | sr_err("va18b: %s: LIMIT_SAMPLES too small.", __func__); | |
245 | return SR_ERR; | |
246 | } | |
247 | ctx->limit_samples = *(const uint64_t *)value; | |
248 | sr_dbg("va18b: Setting LIMIT_SAMPLES to %" PRIu64 ".", | |
249 | ctx->limit_samples); | |
250 | break; | |
251 | default: | |
252 | /* Unknown capability, return SR_ERR. */ | |
253 | sr_err("va18b: %s: Unknown capability: %d.", __func__, hwcap); | |
254 | return SR_ERR; | |
255 | break; | |
256 | } | |
257 | ||
258 | return SR_OK; | |
259 | } | |
260 | ||
261 | static int receive_data(int fd, int revents, void *cb_data) | |
262 | { | |
263 | struct sr_dev_inst *sdi; | |
264 | struct sr_datafeed_packet packet; | |
265 | struct sr_datafeed_analog analog; | |
266 | struct context *ctx; | |
267 | int num_probes; | |
268 | ||
269 | /* Avoid compiler warnings. */ | |
270 | (void)fd; | |
271 | (void)revents; | |
272 | ||
273 | if (!(sdi = cb_data)) { | |
274 | sr_err("va18b: %s: cb_data was NULL.", __func__); | |
275 | return FALSE; | |
276 | } | |
277 | ||
278 | if (!(ctx = sdi->priv)) { | |
279 | sr_err("va18b: %s: sdi->priv was NULL.", __func__); | |
280 | return FALSE; | |
281 | } | |
282 | ||
283 | sr_dbg("va18b: Sending SR_DF_ANALOG packet with 1 sample."); | |
284 | /* TODO: timestamp. */ | |
285 | num_probes = 1; | |
286 | packet.type = SR_DF_ANALOG; | |
287 | packet.payload = &analog; | |
288 | analog.num_samples = 1; | |
289 | analog.mq = SR_MQ_VOLTAGE; | |
290 | analog.unit = SR_UNIT_VOLT; | |
291 | /* TODO: Check alloc return value. */ | |
292 | analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes); | |
293 | analog.data[0] = rand() % 42; /* Transmit dummy data for now. */ | |
294 | sr_session_send(ctx->session_dev_id, &packet); | |
295 | ||
296 | ctx->num_samples++; | |
297 | ||
298 | /* Support for SR_HWCAP_LIMIT_SAMPLES. */ | |
299 | if (ctx->limit_samples > 0 && ctx->num_samples > ctx->limit_samples) { | |
300 | hw_dev_acquisition_stop(0 /* FIXME? */, cb_data); | |
301 | return FALSE; | |
302 | } | |
303 | ||
304 | return TRUE; | |
305 | } | |
306 | ||
307 | static int hw_dev_acquisition_start(int dev_index, void *cb_data) | |
308 | { | |
309 | struct sr_datafeed_packet packet; | |
310 | struct sr_datafeed_header header; | |
311 | struct sr_datafeed_meta_analog meta; | |
312 | struct sr_dev_inst *sdi; | |
313 | struct context *ctx; | |
314 | ||
315 | if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) { | |
316 | sr_err("va18b: %s: sdi was NULL.", __func__); | |
317 | return SR_ERR_BUG; | |
318 | } | |
319 | ||
320 | if (!(ctx = sdi->priv)) { | |
321 | sr_err("va18b: %s: sdi->priv was NULL.", __func__); | |
322 | return SR_ERR_BUG; | |
323 | } | |
324 | ||
325 | sr_dbg("va18b: Starting acquisition."); | |
326 | ||
327 | ctx->session_dev_id = cb_data; | |
328 | ||
329 | /* Send header packet to the session bus. */ | |
330 | sr_dbg("va18b: Sending SR_DF_HEADER."); | |
331 | packet.type = SR_DF_HEADER; | |
332 | packet.payload = (uint8_t *)&header; | |
333 | header.feed_version = 1; | |
334 | gettimeofday(&header.starttime, NULL); | |
335 | sr_session_send(ctx->session_dev_id, &packet); | |
336 | ||
337 | /* Send metadata about the SR_DF_ANALOG packets to come. */ | |
338 | sr_dbg("va18b: Sending SR_DF_META_ANALOG."); | |
339 | packet.type = SR_DF_META_ANALOG; | |
340 | packet.payload = &meta; | |
341 | meta.num_probes = 1; | |
342 | sr_session_send(ctx->session_dev_id, &packet); | |
343 | ||
344 | /* Hook up a dummy handler to receive data from the device. */ | |
345 | sr_source_add(-1, G_IO_IN, 0, receive_data, sdi); | |
346 | ||
347 | return SR_OK; | |
348 | } | |
349 | ||
350 | static int hw_dev_acquisition_stop(int dev_index, void *cb_data) | |
351 | { | |
352 | struct sr_datafeed_packet packet; | |
353 | ||
354 | /* Avoid compiler warnings. */ | |
355 | (void)dev_index; | |
356 | ||
357 | sr_dbg("va18b: Stopping acquisition."); | |
358 | ||
359 | /* Send end packet to the session bus. */ | |
360 | sr_dbg("va18b: Sending SR_DF_END."); | |
361 | packet.type = SR_DF_END; | |
362 | sr_session_send(cb_data, &packet); | |
363 | ||
364 | return SR_OK; | |
365 | } | |
366 | ||
367 | SR_PRIV struct sr_dev_driver mastech_va18b_driver_info = { | |
368 | .name = "mastech-va18b", | |
369 | .longname = "Mastech VA18B", | |
370 | .api_version = 1, | |
371 | .init = hw_init, | |
372 | .cleanup = hw_cleanup, | |
373 | .dev_open = hw_dev_open, | |
374 | .dev_close = hw_dev_close, | |
375 | .dev_info_get = hw_dev_info_get, | |
376 | .dev_status_get = hw_dev_status_get, | |
377 | .hwcap_get_all = hw_hwcap_get_all, | |
378 | .dev_config_set = hw_dev_config_set, | |
379 | .dev_acquisition_start = hw_dev_acquisition_start, | |
380 | .dev_acquisition_stop = hw_dev_acquisition_stop, | |
381 | }; |